/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 INSUFFICIENT_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 08:43:57,241 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 08:43:57,297 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 08:43:57,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 08:43:57,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 08:43:57,328 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 08:43:57,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 08:43:57,329 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 08:43:57,329 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 08:43:57,332 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 08:43:57,332 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 08:43:57,332 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 08:43:57,332 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 08:43:57,333 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 08:43:57,334 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 08:43:57,334 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 08:43:57,334 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 08:43:57,334 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 08:43:57,334 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 08:43:57,334 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 08:43:57,335 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 08:43:57,335 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 08:43:57,335 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 08:43:57,336 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 08:43:57,336 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 08:43:57,336 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 08:43:57,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 08:43:57,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:43:57,337 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 08:43:57,337 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 08:43:57,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 08:43:57,337 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 08:43:57,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 08:43:57,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 08:43:57,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 08:43:57,338 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 08:43:57,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 08:43:57,561 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 08:43:57,563 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 08:43:57,563 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 08:43:57,564 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 08:43:57,564 INFO L431 ainManager$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 08:43:58,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 08:43:58,596 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 08:43:58,597 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-bad-three-array-sum-alt.wvr.c [2023-08-24 08:43:58,609 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f8ffd25/816417f4d5cc443f8504bfef7f2b26c0/FLAGd4949cacc [2023-08-24 08:43:58,624 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11f8ffd25/816417f4d5cc443f8504bfef7f2b26c0 [2023-08-24 08:43:58,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 08:43:58,628 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 08:43:58,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 08:43:58,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 08:43:58,632 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 08:43:58,633 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,634 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490d2a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58, skipping insertion in model container [2023-08-24 08:43:58,634 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,653 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 08:43:58,793 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 08:43:58,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:43:58,810 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 08:43:58,840 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 08:43:58,844 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 08:43:58,857 INFO L206 MainTranslator]: Completed translation [2023-08-24 08:43:58,857 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58 WrapperNode [2023-08-24 08:43:58,858 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 08:43:58,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 08:43:58,859 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 08:43:58,859 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 08:43:58,863 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,904 INFO L138 Inliner]: procedures = 26, calls = 45, calls flagged for inlining = 15, calls inlined = 27, statements flattened = 281 [2023-08-24 08:43:58,905 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 08:43:58,905 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 08:43:58,905 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 08:43:58,905 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 08:43:58,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,922 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,922 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,930 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,931 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,932 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,951 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 08:43:58,951 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 08:43:58,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 08:43:58,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 08:43:58,952 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (1/1) ... [2023-08-24 08:43:58,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 08:43:58,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:43:58,972 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 08:43:58,988 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 08:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 08:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 08:43:59,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 08:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 08:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 08:43:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 08:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 08:43:59,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 08:43:59,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 08:43:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 08:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 08:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 08:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 08:43:59,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 08:43:59,004 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 08:43:59,005 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 08:43:59,100 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 08:43:59,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 08:43:59,442 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 08:43:59,452 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 08:43:59,452 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-24 08:43:59,455 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:43:59 BoogieIcfgContainer [2023-08-24 08:43:59,456 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 08:43:59,458 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 08:43:59,458 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 08:43:59,460 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 08:43:59,460 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 08:43:58" (1/3) ... [2023-08-24 08:43:59,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9a6db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:43:59, skipping insertion in model container [2023-08-24 08:43:59,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 08:43:58" (2/3) ... [2023-08-24 08:43:59,461 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9a6db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 08:43:59, skipping insertion in model container [2023-08-24 08:43:59,461 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 08:43:59" (3/3) ... [2023-08-24 08:43:59,462 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2023-08-24 08:43:59,473 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 08:43:59,473 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 08:43:59,474 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 08:43:59,561 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-24 08:43:59,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 308 places, 327 transitions, 678 flow [2023-08-24 08:43:59,710 INFO L124 PetriNetUnfolderBase]: 29/324 cut-off events. [2023-08-24 08:43:59,710 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:43:59,716 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 08:43:59,716 INFO L82 GeneralOperation]: Start removeDead. Operand has 308 places, 327 transitions, 678 flow [2023-08-24 08:43:59,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 295 places, 314 transitions, 646 flow [2023-08-24 08:43:59,726 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 08:43:59,735 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 295 places, 314 transitions, 646 flow [2023-08-24 08:43:59,738 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 295 places, 314 transitions, 646 flow [2023-08-24 08:43:59,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 295 places, 314 transitions, 646 flow [2023-08-24 08:43:59,789 INFO L124 PetriNetUnfolderBase]: 29/314 cut-off events. [2023-08-24 08:43:59,789 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:43:59,793 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 08:43:59,798 INFO L119 LiptonReduction]: Number of co-enabled transitions 13388 [2023-08-24 08:44:07,282 INFO L134 LiptonReduction]: Checked pairs total: 13040 [2023-08-24 08:44:07,282 INFO L136 LiptonReduction]: Total number of compositions: 368 [2023-08-24 08:44:07,291 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 08:44:07,296 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;@5a7c976d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 08:44:07,296 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-24 08:44:07,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 08:44:07,300 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-08-24 08:44:07,300 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-24 08:44:07,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:07,301 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 08:44:07,301 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 08:44:07,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1559945570, now seen corresponding path program 1 times [2023-08-24 08:44:07,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:07,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121160587] [2023-08-24 08:44:07,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:07,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:07,817 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 08:44:07,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:07,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121160587] [2023-08-24 08:44:07,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121160587] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:44:07,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:44:07,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 08:44:07,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834117504] [2023-08-24 08:44:07,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:07,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 08:44:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:07,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 08:44:07,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 08:44:07,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 286 out of 695 [2023-08-24 08:44:07,851 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 08:44:07,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:07,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 286 of 695 [2023-08-24 08:44:07,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:07,940 INFO L124 PetriNetUnfolderBase]: 362/512 cut-off events. [2023-08-24 08:44:07,940 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-08-24 08:44:07,941 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 08:44:07,943 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 36 selfloop transitions, 4 changer transitions 1/44 dead transitions. [2023-08-24 08:44:07,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 44 transitions, 203 flow [2023-08-24 08:44:07,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 08:44:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 08:44:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 900 transitions. [2023-08-24 08:44:07,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4316546762589928 [2023-08-24 08:44:07,960 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 900 transitions. [2023-08-24 08:44:07,960 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 900 transitions. [2023-08-24 08:44:07,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:07,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 900 transitions. [2023-08-24 08:44:07,969 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 08:44:07,975 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 08:44:07,976 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 08:44:07,977 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 900 transitions. [2023-08-24 08:44:07,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 44 transitions, 203 flow [2023-08-24 08:44:07,981 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 08:44:07,982 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 88 flow [2023-08-24 08:44:07,984 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 08:44:07,986 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-08-24 08:44:07,986 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 88 flow [2023-08-24 08:44:07,987 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 08:44:07,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:07,987 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 08:44:07,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 08:44:07,987 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 08:44:07,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:07,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1846036056, now seen corresponding path program 1 times [2023-08-24 08:44:07,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:07,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005274344] [2023-08-24 08:44:07,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:07,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:08,127 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 08:44:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:08,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005274344] [2023-08-24 08:44:08,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005274344] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:44:08,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:44:08,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:44:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875547009] [2023-08-24 08:44:08,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:08,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:44:08,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:08,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:44:08,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:44:08,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 08:44:08,133 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 08:44:08,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:08,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 08:44:08,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:08,290 INFO L124 PetriNetUnfolderBase]: 617/936 cut-off events. [2023-08-24 08:44:08,290 INFO L125 PetriNetUnfolderBase]: For 257/257 co-relation queries the response was YES. [2023-08-24 08:44:08,291 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 08:44:08,294 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 59 selfloop transitions, 15 changer transitions 0/76 dead transitions. [2023-08-24 08:44:08,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 76 transitions, 356 flow [2023-08-24 08:44:08,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:44:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:44:08,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1538 transitions. [2023-08-24 08:44:08,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688249400479616 [2023-08-24 08:44:08,298 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1538 transitions. [2023-08-24 08:44:08,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1538 transitions. [2023-08-24 08:44:08,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:08,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1538 transitions. [2023-08-24 08:44:08,301 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 08:44:08,306 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 08:44:08,307 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 08:44:08,307 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 88 flow. Second operand 6 states and 1538 transitions. [2023-08-24 08:44:08,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 76 transitions, 356 flow [2023-08-24 08:44:08,309 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 08:44:08,310 INFO L231 Difference]: Finished difference. Result has 37 places, 44 transitions, 188 flow [2023-08-24 08:44:08,310 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 08:44:08,310 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 5 predicate places. [2023-08-24 08:44:08,311 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 44 transitions, 188 flow [2023-08-24 08:44:08,311 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 08:44:08,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:08,311 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 08:44:08,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 08:44:08,312 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 08:44:08,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:08,312 INFO L85 PathProgramCache]: Analyzing trace with hash 983849383, now seen corresponding path program 1 times [2023-08-24 08:44:08,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:08,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467888074] [2023-08-24 08:44:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:08,385 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 08:44:08,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:08,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467888074] [2023-08-24 08:44:08,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467888074] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:44:08,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:44:08,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:44:08,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8080814] [2023-08-24 08:44:08,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:08,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:44:08,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:08,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:44:08,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:44:08,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 08:44:08,389 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 08:44:08,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:08,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 08:44:08,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:08,520 INFO L124 PetriNetUnfolderBase]: 489/767 cut-off events. [2023-08-24 08:44:08,520 INFO L125 PetriNetUnfolderBase]: For 513/575 co-relation queries the response was YES. [2023-08-24 08:44:08,521 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 08:44:08,524 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 55 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2023-08-24 08:44:08,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 73 transitions, 420 flow [2023-08-24 08:44:08,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:44:08,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:44:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1536 transitions. [2023-08-24 08:44:08,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3683453237410072 [2023-08-24 08:44:08,527 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1536 transitions. [2023-08-24 08:44:08,527 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1536 transitions. [2023-08-24 08:44:08,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:08,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1536 transitions. [2023-08-24 08:44:08,530 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 08:44:08,534 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 08:44:08,536 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 08:44:08,536 INFO L175 Difference]: Start difference. First operand has 37 places, 44 transitions, 188 flow. Second operand 6 states and 1536 transitions. [2023-08-24 08:44:08,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 73 transitions, 420 flow [2023-08-24 08:44:08,537 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 08:44:08,538 INFO L231 Difference]: Finished difference. Result has 44 places, 46 transitions, 239 flow [2023-08-24 08:44:08,538 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 08:44:08,539 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-08-24 08:44:08,539 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 46 transitions, 239 flow [2023-08-24 08:44:08,540 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 08:44:08,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:08,540 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 08:44:08,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 08:44:08,540 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 08:44:08,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:08,540 INFO L85 PathProgramCache]: Analyzing trace with hash -661782300, now seen corresponding path program 1 times [2023-08-24 08:44:08,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:08,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25722743] [2023-08-24 08:44:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:08,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:08,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:08,610 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 08:44:08,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:08,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25722743] [2023-08-24 08:44:08,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25722743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 08:44:08,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 08:44:08,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 08:44:08,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835903532] [2023-08-24 08:44:08,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:08,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:44:08,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:08,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:44:08,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 08:44:08,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 695 [2023-08-24 08:44:08,614 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 08:44:08,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:08,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 695 [2023-08-24 08:44:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:08,724 INFO L124 PetriNetUnfolderBase]: 427/653 cut-off events. [2023-08-24 08:44:08,724 INFO L125 PetriNetUnfolderBase]: For 748/822 co-relation queries the response was YES. [2023-08-24 08:44:08,725 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 08:44:08,727 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 26 selfloop transitions, 6 changer transitions 35/69 dead transitions. [2023-08-24 08:44:08,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 69 transitions, 443 flow [2023-08-24 08:44:08,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 08:44:08,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 08:44:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1515 transitions. [2023-08-24 08:44:08,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36330935251798563 [2023-08-24 08:44:08,730 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1515 transitions. [2023-08-24 08:44:08,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1515 transitions. [2023-08-24 08:44:08,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:08,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1515 transitions. [2023-08-24 08:44:08,733 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 08:44:08,737 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 08:44:08,739 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 08:44:08,739 INFO L175 Difference]: Start difference. First operand has 44 places, 46 transitions, 239 flow. Second operand 6 states and 1515 transitions. [2023-08-24 08:44:08,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 69 transitions, 443 flow [2023-08-24 08:44:08,741 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 08:44:08,741 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 156 flow [2023-08-24 08:44:08,742 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 08:44:08,742 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 16 predicate places. [2023-08-24 08:44:08,742 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 156 flow [2023-08-24 08:44:08,743 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 08:44:08,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:08,743 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 08:44:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 08:44:08,743 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 08:44:08,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1161612982, now seen corresponding path program 1 times [2023-08-24 08:44:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268280827] [2023-08-24 08:44:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:08,819 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 08:44:08,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:08,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268280827] [2023-08-24 08:44:08,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268280827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:08,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146833716] [2023-08-24 08:44:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:08,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:08,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:08,822 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 08:44:08,849 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 08:44:08,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:08,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:44:08,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:09,023 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 08:44:09,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:09,058 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 08:44:09,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146833716] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:09,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:44:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 08:44:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136243159] [2023-08-24 08:44:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:09,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:44:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:44:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 08:44:09,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 08:44:09,061 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 08:44:09,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:09,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 08:44:09,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:09,143 INFO L124 PetriNetUnfolderBase]: 378/548 cut-off events. [2023-08-24 08:44:09,143 INFO L125 PetriNetUnfolderBase]: For 567/567 co-relation queries the response was YES. [2023-08-24 08:44:09,144 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 08:44:09,146 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 39 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-24 08:44:09,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 46 transitions, 292 flow [2023-08-24 08:44:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:44:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:44:09,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1263 transitions. [2023-08-24 08:44:09,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36345323741007196 [2023-08-24 08:44:09,149 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1263 transitions. [2023-08-24 08:44:09,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1263 transitions. [2023-08-24 08:44:09,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:09,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1263 transitions. [2023-08-24 08:44:09,151 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 08:44:09,154 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 08:44:09,155 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 08:44:09,155 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 156 flow. Second operand 5 states and 1263 transitions. [2023-08-24 08:44:09,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 46 transitions, 292 flow [2023-08-24 08:44:09,157 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 08:44:09,157 INFO L231 Difference]: Finished difference. Result has 35 places, 35 transitions, 129 flow [2023-08-24 08:44:09,158 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 08:44:09,158 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-24 08:44:09,158 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 35 transitions, 129 flow [2023-08-24 08:44:09,159 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 08:44:09,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:09,159 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 08:44:09,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 08:44:09,365 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 08:44:09,365 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 08:44:09,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:09,366 INFO L85 PathProgramCache]: Analyzing trace with hash 370826187, now seen corresponding path program 1 times [2023-08-24 08:44:09,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:09,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729891482] [2023-08-24 08:44:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:09,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:09,447 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 08:44:09,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729891482] [2023-08-24 08:44:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729891482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624807748] [2023-08-24 08:44:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:09,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:09,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:09,451 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 08:44:09,457 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 08:44:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:09,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:44:09,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:09,604 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 08:44:09,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:09,628 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 08:44:09,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624807748] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:09,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:44:09,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 08:44:09,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448000770] [2023-08-24 08:44:09,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:09,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:44:09,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:09,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:44:09,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 08:44:09,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 695 [2023-08-24 08:44:09,631 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 08:44:09,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:09,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 695 [2023-08-24 08:44:09,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:09,702 INFO L124 PetriNetUnfolderBase]: 297/441 cut-off events. [2023-08-24 08:44:09,703 INFO L125 PetriNetUnfolderBase]: For 283/345 co-relation queries the response was YES. [2023-08-24 08:44:09,703 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 08:44:09,705 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 41 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2023-08-24 08:44:09,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 48 transitions, 271 flow [2023-08-24 08:44:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:44:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:44:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1263 transitions. [2023-08-24 08:44:09,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36345323741007196 [2023-08-24 08:44:09,707 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1263 transitions. [2023-08-24 08:44:09,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1263 transitions. [2023-08-24 08:44:09,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:09,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1263 transitions. [2023-08-24 08:44:09,710 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 08:44:09,713 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 08:44:09,713 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 08:44:09,713 INFO L175 Difference]: Start difference. First operand has 35 places, 35 transitions, 129 flow. Second operand 5 states and 1263 transitions. [2023-08-24 08:44:09,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 48 transitions, 271 flow [2023-08-24 08:44:09,714 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 08:44:09,715 INFO L231 Difference]: Finished difference. Result has 38 places, 36 transitions, 139 flow [2023-08-24 08:44:09,715 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 08:44:09,715 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-08-24 08:44:09,715 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 36 transitions, 139 flow [2023-08-24 08:44:09,716 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 08:44:09,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:09,716 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 08:44:09,728 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 08:44:09,921 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 08:44:09,922 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 08:44:09,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:09,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1419956551, now seen corresponding path program 1 times [2023-08-24 08:44:09,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:09,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180844969] [2023-08-24 08:44:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:09,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:10,027 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 08:44:10,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:10,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180844969] [2023-08-24 08:44:10,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180844969] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:10,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942646359] [2023-08-24 08:44:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:10,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:10,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:10,028 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 08:44:10,056 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 08:44:10,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:10,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 08:44:10,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:10,175 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 08:44:10,175 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:10,202 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 08:44:10,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942646359] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:10,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-24 08:44:10,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-24 08:44:10,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456693725] [2023-08-24 08:44:10,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 08:44:10,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 08:44:10,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:10,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 08:44:10,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-24 08:44:10,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 695 [2023-08-24 08:44:10,205 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 08:44:10,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:10,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 695 [2023-08-24 08:44:10,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:10,280 INFO L124 PetriNetUnfolderBase]: 282/422 cut-off events. [2023-08-24 08:44:10,280 INFO L125 PetriNetUnfolderBase]: For 431/551 co-relation queries the response was YES. [2023-08-24 08:44:10,280 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 08:44:10,282 INFO L140 encePairwiseOnDemand]: 690/695 looper letters, 43 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-08-24 08:44:10,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 50 transitions, 293 flow [2023-08-24 08:44:10,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 08:44:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 08:44:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1248 transitions. [2023-08-24 08:44:10,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.359136690647482 [2023-08-24 08:44:10,285 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1248 transitions. [2023-08-24 08:44:10,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1248 transitions. [2023-08-24 08:44:10,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:10,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1248 transitions. [2023-08-24 08:44:10,287 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 08:44:10,290 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 08:44:10,291 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 08:44:10,291 INFO L175 Difference]: Start difference. First operand has 38 places, 36 transitions, 139 flow. Second operand 5 states and 1248 transitions. [2023-08-24 08:44:10,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 50 transitions, 293 flow [2023-08-24 08:44:10,291 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 08:44:10,292 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 149 flow [2023-08-24 08:44:10,292 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 08:44:10,293 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-24 08:44:10,293 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 149 flow [2023-08-24 08:44:10,293 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 08:44:10,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:10,293 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 08:44:10,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 08:44:10,498 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 08:44:10,498 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 08:44:10,499 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:10,499 INFO L85 PathProgramCache]: Analyzing trace with hash 571492525, now seen corresponding path program 1 times [2023-08-24 08:44:10,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:10,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875233648] [2023-08-24 08:44:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:10,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:11,466 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 08:44:11,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:11,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875233648] [2023-08-24 08:44:11,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875233648] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:11,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859043849] [2023-08-24 08:44:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:11,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:11,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:11,468 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 08:44:11,470 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 08:44:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:11,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-24 08:44:11,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:11,886 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 08:44:12,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:12,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:12,024 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:44:12,024 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 08:44:12,113 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:12,113 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 08:44:12,136 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 08:44:12,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:12,228 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 08:44:12,243 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 08:44:12,251 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 08:44:12,266 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 08:44:12,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:12,295 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 08:44:12,325 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:12,325 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 08:44:12,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:12,339 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 08:44:13,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:13,633 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:13,634 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:13,636 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 08:44:13,808 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 08:44:13,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859043849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:13,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:13,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2023-08-24 08:44:13,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516958890] [2023-08-24 08:44:13,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:13,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:44:13,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:13,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:44:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=662, Unknown=4, NotChecked=220, Total=992 [2023-08-24 08:44:13,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 695 [2023-08-24 08:44:13,819 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 08:44:13,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:13,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 695 [2023-08-24 08:44:13,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:14,946 INFO L124 PetriNetUnfolderBase]: 827/1205 cut-off events. [2023-08-24 08:44:14,947 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2023-08-24 08:44:14,948 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 08:44:14,953 INFO L140 encePairwiseOnDemand]: 680/695 looper letters, 88 selfloop transitions, 44 changer transitions 1/133 dead transitions. [2023-08-24 08:44:14,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 133 transitions, 772 flow [2023-08-24 08:44:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:44:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:44:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2614 transitions. [2023-08-24 08:44:14,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419228253760628 [2023-08-24 08:44:14,958 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2614 transitions. [2023-08-24 08:44:14,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2614 transitions. [2023-08-24 08:44:14,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:14,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2614 transitions. [2023-08-24 08:44:14,962 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 08:44:14,968 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 08:44:14,969 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 08:44:14,969 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 149 flow. Second operand 11 states and 2614 transitions. [2023-08-24 08:44:14,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 133 transitions, 772 flow [2023-08-24 08:44:14,971 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 08:44:14,972 INFO L231 Difference]: Finished difference. Result has 53 places, 77 transitions, 486 flow [2023-08-24 08:44:14,972 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 08:44:14,973 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 21 predicate places. [2023-08-24 08:44:14,973 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 77 transitions, 486 flow [2023-08-24 08:44:14,975 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 08:44:14,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:14,975 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 08:44:14,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 08:44:15,180 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 08:44:15,180 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 08:44:15,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:15,181 INFO L85 PathProgramCache]: Analyzing trace with hash -660330391, now seen corresponding path program 2 times [2023-08-24 08:44:15,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:15,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193752513] [2023-08-24 08:44:15,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:15,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:16,306 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 08:44:16,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193752513] [2023-08-24 08:44:16,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193752513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:16,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431166815] [2023-08-24 08:44:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:44:16,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:16,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:16,307 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 08:44:16,310 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 08:44:16,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:44:16,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:16,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:44:16,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:16,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:16,753 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 08:44:16,767 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 08:44:16,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:16,892 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:16,893 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 08:44:16,985 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:44:16,985 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 08:44:17,095 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 08:44:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431166815] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:17,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:17,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 23 [2023-08-24 08:44:17,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724444671] [2023-08-24 08:44:17,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:17,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 08:44:17,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:17,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 08:44:17,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 08:44:17,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 08:44:17,103 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 08:44:17,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:17,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 08:44:17,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:17,774 INFO L124 PetriNetUnfolderBase]: 946/1379 cut-off events. [2023-08-24 08:44:17,774 INFO L125 PetriNetUnfolderBase]: For 2886/2886 co-relation queries the response was YES. [2023-08-24 08:44:17,776 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 08:44:17,782 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 97 selfloop transitions, 34 changer transitions 1/132 dead transitions. [2023-08-24 08:44:17,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 132 transitions, 1090 flow [2023-08-24 08:44:17,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:44:17,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:44:17,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2524 transitions. [2023-08-24 08:44:17,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026378896882494 [2023-08-24 08:44:17,787 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2524 transitions. [2023-08-24 08:44:17,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2524 transitions. [2023-08-24 08:44:17,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:17,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2524 transitions. [2023-08-24 08:44:17,791 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 08:44:17,797 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 08:44:17,798 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 08:44:17,798 INFO L175 Difference]: Start difference. First operand has 53 places, 77 transitions, 486 flow. Second operand 12 states and 2524 transitions. [2023-08-24 08:44:17,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 132 transitions, 1090 flow [2023-08-24 08:44:17,803 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 08:44:17,806 INFO L231 Difference]: Finished difference. Result has 69 places, 100 transitions, 698 flow [2023-08-24 08:44:17,806 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 08:44:17,807 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 37 predicate places. [2023-08-24 08:44:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 100 transitions, 698 flow [2023-08-24 08:44:17,808 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 08:44:17,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:17,808 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, 1, 1, 1, 1, 1, 1] [2023-08-24 08:44:17,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 08:44:18,013 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 08:44:18,013 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 08:44:18,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:18,014 INFO L85 PathProgramCache]: Analyzing trace with hash 10907973, now seen corresponding path program 3 times [2023-08-24 08:44:18,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:18,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271065776] [2023-08-24 08:44:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:18,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:18,636 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 08:44:18,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:18,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271065776] [2023-08-24 08:44:18,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271065776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:18,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836873261] [2023-08-24 08:44:18,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:44:18,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:18,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:18,638 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 08:44:18,664 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 08:44:18,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:44:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:18,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:44:18,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:18,978 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:18,978 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 08:44:18,994 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 08:44:18,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:19,116 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:19,117 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 08:44:19,293 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 08:44:19,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836873261] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:19,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:19,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-24 08:44:19,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003543739] [2023-08-24 08:44:19,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:19,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:44:19,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:44:19,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:44:19,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:44:19,304 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 08:44:19,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:19,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:44:19,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:19,885 INFO L124 PetriNetUnfolderBase]: 1113/1621 cut-off events. [2023-08-24 08:44:19,886 INFO L125 PetriNetUnfolderBase]: For 4300/4300 co-relation queries the response was YES. [2023-08-24 08:44:19,889 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 08:44:19,896 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 126 selfloop transitions, 45 changer transitions 1/172 dead transitions. [2023-08-24 08:44:19,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 172 transitions, 1497 flow [2023-08-24 08:44:19,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:44:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:44:19,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2233 transitions. [2023-08-24 08:44:19,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569944044764189 [2023-08-24 08:44:19,901 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2233 transitions. [2023-08-24 08:44:19,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2233 transitions. [2023-08-24 08:44:19,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:19,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2233 transitions. [2023-08-24 08:44:19,904 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 08:44:19,909 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 08:44:19,909 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 08:44:19,909 INFO L175 Difference]: Start difference. First operand has 69 places, 100 transitions, 698 flow. Second operand 9 states and 2233 transitions. [2023-08-24 08:44:19,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 172 transitions, 1497 flow [2023-08-24 08:44:19,917 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 08:44:19,920 INFO L231 Difference]: Finished difference. Result has 81 places, 126 transitions, 1027 flow [2023-08-24 08:44:19,920 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 08:44:19,921 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 49 predicate places. [2023-08-24 08:44:19,921 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 126 transitions, 1027 flow [2023-08-24 08:44:19,922 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 08:44:19,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:19,923 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 08:44:19,928 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 08:44:20,128 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 08:44:20,129 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 08:44:20,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:20,129 INFO L85 PathProgramCache]: Analyzing trace with hash -530011037, now seen corresponding path program 4 times [2023-08-24 08:44:20,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:20,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850751241] [2023-08-24 08:44:20,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:20,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:20,838 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 08:44:20,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:20,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850751241] [2023-08-24 08:44:20,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850751241] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:20,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620987732] [2023-08-24 08:44:20,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:44:20,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:20,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:20,841 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 08:44:20,869 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 08:44:20,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:44:20,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:20,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:44:20,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:21,186 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:21,186 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 08:44:21,204 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 08:44:21,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:21,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:21,332 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 38 treesize of output 87 [2023-08-24 08:44:21,464 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 08:44:21,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620987732] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:21,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:21,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-24 08:44:21,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661968489] [2023-08-24 08:44:21,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:21,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:44:21,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:44:21,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:44:21,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:44:21,472 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 08:44:21,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:21,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:44:21,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:22,065 INFO L124 PetriNetUnfolderBase]: 1270/1849 cut-off events. [2023-08-24 08:44:22,065 INFO L125 PetriNetUnfolderBase]: For 6522/6522 co-relation queries the response was YES. [2023-08-24 08:44:22,070 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 08:44:22,078 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 137 selfloop transitions, 54 changer transitions 1/192 dead transitions. [2023-08-24 08:44:22,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 192 transitions, 1874 flow [2023-08-24 08:44:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:44:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:44:22,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2229 transitions. [2023-08-24 08:44:22,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563549160671463 [2023-08-24 08:44:22,082 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2229 transitions. [2023-08-24 08:44:22,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2229 transitions. [2023-08-24 08:44:22,083 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:22,083 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2229 transitions. [2023-08-24 08:44:22,086 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 08:44:22,092 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 08:44:22,092 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 08:44:22,092 INFO L175 Difference]: Start difference. First operand has 81 places, 126 transitions, 1027 flow. Second operand 9 states and 2229 transitions. [2023-08-24 08:44:22,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 192 transitions, 1874 flow [2023-08-24 08:44:22,104 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 08:44:22,106 INFO L231 Difference]: Finished difference. Result has 92 places, 151 transitions, 1378 flow [2023-08-24 08:44:22,107 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 08:44:22,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 60 predicate places. [2023-08-24 08:44:22,107 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 151 transitions, 1378 flow [2023-08-24 08:44:22,108 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 08:44:22,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:22,108 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 08:44:22,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-24 08:44:22,318 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 08:44:22,319 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 08:44:22,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:22,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1994739219, now seen corresponding path program 5 times [2023-08-24 08:44:22,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:22,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373122277] [2023-08-24 08:44:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:22,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:22,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:22,908 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 08:44:22,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:22,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373122277] [2023-08-24 08:44:22,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373122277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:22,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853281191] [2023-08-24 08:44:22,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:44:22,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:22,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:22,910 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 08:44:22,912 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 08:44:23,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:44:23,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:23,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:44:23,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:23,295 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:23,295 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 08:44:23,315 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 08:44:23,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:23,438 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:23,439 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 08:44:23,497 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 08:44:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853281191] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:23,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:23,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2023-08-24 08:44:23,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599793221] [2023-08-24 08:44:23,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:23,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:44:23,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:23,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:44:23,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:44:23,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:44:23,503 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 08:44:23,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:23,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:44:23,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:24,050 INFO L124 PetriNetUnfolderBase]: 1521/2215 cut-off events. [2023-08-24 08:44:24,051 INFO L125 PetriNetUnfolderBase]: For 9853/9853 co-relation queries the response was YES. [2023-08-24 08:44:24,057 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 08:44:24,071 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 155 selfloop transitions, 83 changer transitions 1/239 dead transitions. [2023-08-24 08:44:24,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 239 transitions, 2488 flow [2023-08-24 08:44:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:44:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:44:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2241 transitions. [2023-08-24 08:44:24,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35827338129496406 [2023-08-24 08:44:24,076 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2241 transitions. [2023-08-24 08:44:24,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2241 transitions. [2023-08-24 08:44:24,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:24,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2241 transitions. [2023-08-24 08:44:24,079 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 08:44:24,083 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 08:44:24,083 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 08:44:24,083 INFO L175 Difference]: Start difference. First operand has 92 places, 151 transitions, 1378 flow. Second operand 9 states and 2241 transitions. [2023-08-24 08:44:24,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 239 transitions, 2488 flow [2023-08-24 08:44:24,105 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 08:44:24,109 INFO L231 Difference]: Finished difference. Result has 104 places, 184 transitions, 1874 flow [2023-08-24 08:44:24,109 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 08:44:24,110 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 72 predicate places. [2023-08-24 08:44:24,110 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 184 transitions, 1874 flow [2023-08-24 08:44:24,111 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 08:44:24,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:24,111 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 08:44:24,119 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 08:44:24,316 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 08:44:24,317 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 08:44:24,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:24,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1191421785, now seen corresponding path program 6 times [2023-08-24 08:44:24,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447026203] [2023-08-24 08:44:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:24,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:25,289 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 08:44:25,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:25,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447026203] [2023-08-24 08:44:25,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447026203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:25,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889798200] [2023-08-24 08:44:25,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:44:25,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:25,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:25,291 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 08:44:25,293 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 08:44:25,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:44:25,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:25,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:44:25,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:25,501 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 08:44:25,547 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:44:25,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-24 08:44:25,847 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:44:25,848 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 08:44:25,967 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:25,967 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 08:44:26,023 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 08:44:26,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:30,341 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:30,341 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 08:44:30,358 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:30,540 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 08:44:30,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889798200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:30,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:30,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2023-08-24 08:44:30,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457735499] [2023-08-24 08:44:30,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:30,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:44:30,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:30,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:44:30,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:44:30,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:44:30,548 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 08:44:30,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:30,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:44:30,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:31,642 INFO L124 PetriNetUnfolderBase]: 1609/2344 cut-off events. [2023-08-24 08:44:31,642 INFO L125 PetriNetUnfolderBase]: For 12955/12955 co-relation queries the response was YES. [2023-08-24 08:44:31,650 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 08:44:31,658 INFO L140 encePairwiseOnDemand]: 679/695 looper letters, 147 selfloop transitions, 90 changer transitions 1/238 dead transitions. [2023-08-24 08:44:31,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 238 transitions, 2734 flow [2023-08-24 08:44:31,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:44:31,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:44:31,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2715 transitions. [2023-08-24 08:44:31,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30049806308799115 [2023-08-24 08:44:31,665 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2715 transitions. [2023-08-24 08:44:31,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2715 transitions. [2023-08-24 08:44:31,666 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:31,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2715 transitions. [2023-08-24 08:44:31,669 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 08:44:31,675 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 08:44:31,676 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 08:44:31,676 INFO L175 Difference]: Start difference. First operand has 104 places, 184 transitions, 1874 flow. Second operand 13 states and 2715 transitions. [2023-08-24 08:44:31,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 238 transitions, 2734 flow [2023-08-24 08:44:31,711 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 08:44:31,714 INFO L231 Difference]: Finished difference. Result has 118 places, 193 transitions, 2109 flow [2023-08-24 08:44:31,714 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 08:44:31,714 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 86 predicate places. [2023-08-24 08:44:31,714 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 193 transitions, 2109 flow [2023-08-24 08:44:31,716 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 08:44:31,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:31,716 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 08:44:31,721 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 08:44:31,921 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 08:44:31,921 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 08:44:31,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1481917211, now seen corresponding path program 7 times [2023-08-24 08:44:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:31,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625604236] [2023-08-24 08:44:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:31,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:32,472 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 08:44:32,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:32,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625604236] [2023-08-24 08:44:32,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625604236] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:32,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163087713] [2023-08-24 08:44:32,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:44:32,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:32,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:32,473 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 08:44:32,515 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 08:44:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:32,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:44:32,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:32,954 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:32,955 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 08:44:32,969 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 08:44:32,969 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:33,120 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:33,120 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 08:44:33,176 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 08:44:33,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163087713] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:33,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:33,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 18 [2023-08-24 08:44:33,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575074102] [2023-08-24 08:44:33,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:33,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 08:44:33,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:33,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 08:44:33,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2023-08-24 08:44:33,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:44:33,182 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 08:44:33,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:33,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:44:33,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:33,850 INFO L124 PetriNetUnfolderBase]: 1699/2477 cut-off events. [2023-08-24 08:44:33,850 INFO L125 PetriNetUnfolderBase]: For 14664/14664 co-relation queries the response was YES. [2023-08-24 08:44:33,860 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 08:44:33,869 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 161 selfloop transitions, 84 changer transitions 1/246 dead transitions. [2023-08-24 08:44:33,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 246 transitions, 2954 flow [2023-08-24 08:44:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:44:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:44:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2243 transitions. [2023-08-24 08:44:33,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585931254996003 [2023-08-24 08:44:33,873 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2243 transitions. [2023-08-24 08:44:33,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2243 transitions. [2023-08-24 08:44:33,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:33,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2243 transitions. [2023-08-24 08:44:33,876 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 08:44:33,880 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 08:44:33,881 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 08:44:33,881 INFO L175 Difference]: Start difference. First operand has 118 places, 193 transitions, 2109 flow. Second operand 9 states and 2243 transitions. [2023-08-24 08:44:33,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 246 transitions, 2954 flow [2023-08-24 08:44:33,921 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 08:44:33,925 INFO L231 Difference]: Finished difference. Result has 123 places, 199 transitions, 2286 flow [2023-08-24 08:44:33,925 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 08:44:33,926 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 91 predicate places. [2023-08-24 08:44:33,926 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 199 transitions, 2286 flow [2023-08-24 08:44:33,927 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 08:44:33,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:33,927 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 08:44:33,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-24 08:44:34,132 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 08:44:34,132 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 08:44:34,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:34,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1102152841, now seen corresponding path program 8 times [2023-08-24 08:44:34,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:34,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364394830] [2023-08-24 08:44:34,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:34,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:34,775 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 08:44:34,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364394830] [2023-08-24 08:44:34,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364394830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:34,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023467667] [2023-08-24 08:44:34,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:44:34,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:34,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:34,776 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 08:44:34,802 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 08:44:34,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:44:34,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:34,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:44:34,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:34,931 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 08:44:34,961 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:44:34,962 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 08:44:35,156 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:44:35,157 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 08:44:35,322 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:35,322 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 08:44:35,399 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 08:44:35,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:35,641 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:35,642 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 08:44:35,658 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:35,818 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 08:44:35,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023467667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:35,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:35,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-08-24 08:44:35,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81743682] [2023-08-24 08:44:35,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:35,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:44:35,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:35,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:44:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:44:35,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:44:35,827 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 08:44:35,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:35,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:44:35,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:36,736 INFO L124 PetriNetUnfolderBase]: 1843/2686 cut-off events. [2023-08-24 08:44:36,736 INFO L125 PetriNetUnfolderBase]: For 18411/18411 co-relation queries the response was YES. [2023-08-24 08:44:36,744 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 08:44:36,752 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 166 selfloop transitions, 91 changer transitions 1/258 dead transitions. [2023-08-24 08:44:36,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 258 transitions, 3239 flow [2023-08-24 08:44:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:44:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:44:36,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2563 transitions. [2023-08-24 08:44:36,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33525179856115106 [2023-08-24 08:44:36,755 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2563 transitions. [2023-08-24 08:44:36,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2563 transitions. [2023-08-24 08:44:36,755 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:36,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2563 transitions. [2023-08-24 08:44:36,758 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 08:44:36,762 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 08:44:36,763 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 08:44:36,763 INFO L175 Difference]: Start difference. First operand has 123 places, 199 transitions, 2286 flow. Second operand 11 states and 2563 transitions. [2023-08-24 08:44:36,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 258 transitions, 3239 flow [2023-08-24 08:44:36,809 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 08:44:36,811 INFO L231 Difference]: Finished difference. Result has 129 places, 209 transitions, 2439 flow [2023-08-24 08:44:36,812 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 08:44:36,812 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 97 predicate places. [2023-08-24 08:44:36,812 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 209 transitions, 2439 flow [2023-08-24 08:44:36,813 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 08:44:36,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:36,813 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 08:44:36,818 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 08:44:37,018 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 08:44:37,018 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 08:44:37,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash -24367267, now seen corresponding path program 9 times [2023-08-24 08:44:37,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:37,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953844274] [2023-08-24 08:44:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:37,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:37,918 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 08:44:37,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:37,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953844274] [2023-08-24 08:44:37,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953844274] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:37,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433997262] [2023-08-24 08:44:37,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:44:37,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:37,919 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 08:44:37,920 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 08:44:38,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:44:38,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:38,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:44:38,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:38,116 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 08:44:38,165 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:44:38,165 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 08:44:38,440 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:44:38,440 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 08:44:38,555 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:38,555 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 08:44:38,630 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 08:44:38,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:42,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:42,245 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 08:44:42,260 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:42,415 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 08:44:42,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433997262] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:42,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:42,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 28 [2023-08-24 08:44:42,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734043183] [2023-08-24 08:44:42,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:42,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:44:42,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:42,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:44:42,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:44:42,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:44:42,421 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 08:44:42,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:42,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:44:42,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:43,413 INFO L124 PetriNetUnfolderBase]: 1931/2815 cut-off events. [2023-08-24 08:44:43,413 INFO L125 PetriNetUnfolderBase]: For 20612/20612 co-relation queries the response was YES. [2023-08-24 08:44:43,421 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 08:44:43,428 INFO L140 encePairwiseOnDemand]: 679/695 looper letters, 174 selfloop transitions, 88 changer transitions 1/263 dead transitions. [2023-08-24 08:44:43,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 263 transitions, 3357 flow [2023-08-24 08:44:43,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:44:43,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:44:43,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2713 transitions. [2023-08-24 08:44:43,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30027670171555065 [2023-08-24 08:44:43,432 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2713 transitions. [2023-08-24 08:44:43,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2713 transitions. [2023-08-24 08:44:43,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:43,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2713 transitions. [2023-08-24 08:44:43,435 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 08:44:43,439 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 08:44:43,440 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 08:44:43,440 INFO L175 Difference]: Start difference. First operand has 129 places, 209 transitions, 2439 flow. Second operand 13 states and 2713 transitions. [2023-08-24 08:44:43,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 263 transitions, 3357 flow [2023-08-24 08:44:43,502 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 08:44:43,505 INFO L231 Difference]: Finished difference. Result has 137 places, 215 transitions, 2510 flow [2023-08-24 08:44:43,505 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 08:44:43,506 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 105 predicate places. [2023-08-24 08:44:43,506 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 215 transitions, 2510 flow [2023-08-24 08:44:43,506 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 08:44:43,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:43,507 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 08:44:43,514 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 08:44:43,717 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 08:44:43,717 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 08:44:43,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:43,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1998475161, now seen corresponding path program 10 times [2023-08-24 08:44:43,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:43,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193860723] [2023-08-24 08:44:43,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:43,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:44,393 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 08:44:44,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193860723] [2023-08-24 08:44:44,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193860723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:44,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669898314] [2023-08-24 08:44:44,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:44:44,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:44,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:44,395 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 08:44:44,397 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 08:44:44,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:44:44,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:44,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 08:44:44,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:44,745 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 08:44:44,878 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:44,879 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 08:44:44,903 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 08:44:44,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:45,071 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_942 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_942) c_~A~0.base) c_~A~0.offset) c_~csum~0))) (forall ((v_ArrVal_942 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_942) c_~A~0.base) c_~A~0.offset) c_~csum~0) .cse0)))) is different from false [2023-08-24 08:44:45,083 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:45,083 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 08:44:45,086 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 08:44:45,096 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:45,204 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 08:44:45,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669898314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:45,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:45,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-08-24 08:44:45,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693998196] [2023-08-24 08:44:45,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:45,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:44:45,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:44:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=643, Unknown=1, NotChecked=52, Total=812 [2023-08-24 08:44:45,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 08:44:45,210 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 08:44:45,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:45,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 08:44:45,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:46,035 INFO L124 PetriNetUnfolderBase]: 2142/3121 cut-off events. [2023-08-24 08:44:46,036 INFO L125 PetriNetUnfolderBase]: For 22877/22877 co-relation queries the response was YES. [2023-08-24 08:44:46,047 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 08:44:46,057 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 185 selfloop transitions, 113 changer transitions 1/299 dead transitions. [2023-08-24 08:44:46,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 299 transitions, 3810 flow [2023-08-24 08:44:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:44:46,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:44:46,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2439 transitions. [2023-08-24 08:44:46,060 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35093525179856117 [2023-08-24 08:44:46,060 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2439 transitions. [2023-08-24 08:44:46,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2439 transitions. [2023-08-24 08:44:46,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:46,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2439 transitions. [2023-08-24 08:44:46,062 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 08:44:46,065 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 08:44:46,066 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 08:44:46,066 INFO L175 Difference]: Start difference. First operand has 137 places, 215 transitions, 2510 flow. Second operand 10 states and 2439 transitions. [2023-08-24 08:44:46,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 299 transitions, 3810 flow [2023-08-24 08:44:46,130 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 08:44:46,133 INFO L231 Difference]: Finished difference. Result has 141 places, 244 transitions, 3042 flow [2023-08-24 08:44:46,133 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 08:44:46,133 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 109 predicate places. [2023-08-24 08:44:46,133 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 244 transitions, 3042 flow [2023-08-24 08:44:46,134 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 08:44:46,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:46,134 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 08:44:46,141 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 08:44:46,344 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 08:44:46,344 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 08:44:46,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:46,344 INFO L85 PathProgramCache]: Analyzing trace with hash 420186925, now seen corresponding path program 11 times [2023-08-24 08:44:46,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:46,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944158001] [2023-08-24 08:44:46,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:46,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:47,385 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 08:44:47,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:47,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944158001] [2023-08-24 08:44:47,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944158001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:47,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660394139] [2023-08-24 08:44:47,385 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:44:47,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:47,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:47,387 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 08:44:47,387 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 08:44:47,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:44:47,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:47,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:44:47,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:47,560 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 08:44:47,612 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:44:47,612 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 08:44:47,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:47,862 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 08:44:47,972 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:44:47,972 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 08:44:48,084 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:48,084 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 08:44:48,131 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 08:44:48,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:51,250 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 08:44:51,261 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 08:44:51,294 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:51,295 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 08:44:51,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:51,314 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 08:44:52,903 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:52,904 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 08:44:52,922 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 08:44:52,928 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:52,928 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 08:44:52,938 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:52,941 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:52,952 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 08:44:52,967 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:52,967 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 08:44:53,051 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,055 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,061 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,064 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 08:44:53,096 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:53,097 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 08:44:53,205 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,208 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,215 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:53,216 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 08:44:53,225 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,231 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,235 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,240 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 08:44:53,248 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:53,248 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 08:44:53,271 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:53,271 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 08:44:53,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:53,301 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 08:44:53,302 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 08:44:53,304 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,309 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,314 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:44:53,332 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:53,335 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:53,347 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 08:44:53,580 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 08:44:53,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660394139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:53,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:53,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 33 [2023-08-24 08:44:53,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720414916] [2023-08-24 08:44:53,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:53,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:44:53,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:53,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:44:53,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=935, Unknown=2, NotChecked=126, Total=1190 [2023-08-24 08:44:53,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 695 [2023-08-24 08:44:53,586 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 08:44:53,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:53,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 695 [2023-08-24 08:44:53,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:54,906 INFO L124 PetriNetUnfolderBase]: 2230/3250 cut-off events. [2023-08-24 08:44:54,907 INFO L125 PetriNetUnfolderBase]: For 28673/28673 co-relation queries the response was YES. [2023-08-24 08:44:54,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20321 conditions, 3250 events. 2230/3250 cut-off events. For 28673/28673 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14422 event pairs, 244 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 08:44:54,929 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 183 selfloop transitions, 113 changer transitions 1/297 dead transitions. [2023-08-24 08:44:54,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 297 transitions, 4069 flow [2023-08-24 08:44:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:44:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:44:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2609 transitions. [2023-08-24 08:44:54,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2887659103486442 [2023-08-24 08:44:54,935 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2609 transitions. [2023-08-24 08:44:54,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2609 transitions. [2023-08-24 08:44:54,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:54,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2609 transitions. [2023-08-24 08:44:54,938 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 08:44:54,942 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 08:44:54,943 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 08:44:54,943 INFO L175 Difference]: Start difference. First operand has 141 places, 244 transitions, 3042 flow. Second operand 13 states and 2609 transitions. [2023-08-24 08:44:54,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 297 transitions, 4069 flow [2023-08-24 08:44:55,020 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 08:44:55,024 INFO L231 Difference]: Finished difference. Result has 154 places, 252 transitions, 3322 flow [2023-08-24 08:44:55,024 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 08:44:55,024 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 122 predicate places. [2023-08-24 08:44:55,024 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 252 transitions, 3322 flow [2023-08-24 08:44:55,025 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 08:44:55,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:55,025 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 08:44:55,032 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 08:44:55,233 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 08:44:55,233 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 08:44:55,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:55,233 INFO L85 PathProgramCache]: Analyzing trace with hash -172778783, now seen corresponding path program 12 times [2023-08-24 08:44:55,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:55,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313971746] [2023-08-24 08:44:55,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:55,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:55,844 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 08:44:55,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:55,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313971746] [2023-08-24 08:44:55,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313971746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:55,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819063317] [2023-08-24 08:44:55,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:44:55,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:55,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:55,845 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 08:44:55,847 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 08:44:55,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:44:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:44:55,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 08:44:55,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:56,204 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 08:44:56,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:56,314 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 08:44:56,329 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 08:44:56,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:44:56,453 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 08:44:56,459 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 08:44:56,476 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:56,476 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 08:44:56,479 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 08:44:56,487 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:44:56,574 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 08:44:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819063317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:44:56,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:44:56,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-24 08:44:56,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997720832] [2023-08-24 08:44:56,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:44:56,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:44:56,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:44:56,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:44:56,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=510, Unknown=2, NotChecked=94, Total=702 [2023-08-24 08:44:56,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 08:44:56,580 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 08:44:56,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:44:56,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 08:44:56,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:44:57,366 INFO L124 PetriNetUnfolderBase]: 2320/3383 cut-off events. [2023-08-24 08:44:57,366 INFO L125 PetriNetUnfolderBase]: For 29022/29022 co-relation queries the response was YES. [2023-08-24 08:44:57,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21579 conditions, 3383 events. 2320/3383 cut-off events. For 29022/29022 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 15250 event pairs, 246 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 08:44:57,389 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 194 selfloop transitions, 110 changer transitions 1/305 dead transitions. [2023-08-24 08:44:57,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 305 transitions, 4315 flow [2023-08-24 08:44:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:44:57,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:44:57,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2441 transitions. [2023-08-24 08:44:57,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35122302158273383 [2023-08-24 08:44:57,392 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2441 transitions. [2023-08-24 08:44:57,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2441 transitions. [2023-08-24 08:44:57,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:44:57,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2441 transitions. [2023-08-24 08:44:57,395 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 08:44:57,398 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 08:44:57,398 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 08:44:57,398 INFO L175 Difference]: Start difference. First operand has 154 places, 252 transitions, 3322 flow. Second operand 10 states and 2441 transitions. [2023-08-24 08:44:57,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 305 transitions, 4315 flow [2023-08-24 08:44:57,471 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 08:44:57,474 INFO L231 Difference]: Finished difference. Result has 160 places, 258 transitions, 3557 flow [2023-08-24 08:44:57,475 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 08:44:57,475 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 128 predicate places. [2023-08-24 08:44:57,475 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 258 transitions, 3557 flow [2023-08-24 08:44:57,476 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 08:44:57,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:44:57,476 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 08:44:57,483 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 08:44:57,676 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 08:44:57,676 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 08:44:57,676 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:44:57,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1560142563, now seen corresponding path program 13 times [2023-08-24 08:44:57,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:44:57,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529788821] [2023-08-24 08:44:57,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:44:57,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:44:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:58,298 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 08:44:58,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:44:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529788821] [2023-08-24 08:44:58,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529788821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:44:58,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233495789] [2023-08-24 08:44:58,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:44:58,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:44:58,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:44:58,299 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 08:44:58,300 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 08:44:58,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:44:58,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:44:58,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:44:58,458 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 08:44:58,505 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:44:58,505 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 08:44:58,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:44:58,686 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 08:44:58,798 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:44:58,798 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 08:44:58,953 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:44:58,954 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 08:44:58,991 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 08:44:58,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:00,781 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_thread3Thread1of1ForFork1_~i~2#1| 4))) (let ((.cse4 (select (select |c_#memory_int| c_~B~0.base) (+ .cse2 c_~B~0.offset))) (.cse5 (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset .cse2)))) (let ((.cse1 (select |c_#memory_int| c_~C~0.base)) (.cse3 (+ .cse4 .cse5)) (.cse0 (+ .cse4 c_~csum~0 .cse5))) (and (forall ((~C~0.offset Int)) (<= .cse0 (+ (select (select (store |c_#memory_int| c_~C~0.base (store .cse1 (+ .cse2 ~C~0.offset) .cse3)) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0))) (forall ((~C~0.offset Int)) (<= (+ (select (select (store |c_#memory_int| c_~C~0.base (store .cse1 (+ .cse2 ~C~0.offset) .cse3)) c_~B~0.base) c_~B~0.offset) c_~asum~0 c_~bsum~0) .cse0)))))) is different from false [2023-08-24 08:45:00,866 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 08:45:00,895 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:00,895 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 08:45:00,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:00,913 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 08:45:02,933 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:02,933 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 08:45:02,937 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 08:45:02,966 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:02,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:45:02,973 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 08:45:02,985 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 08:45:02,991 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 08:45:02,998 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:02,998 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 08:45:03,010 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 08:45:03,019 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 08:45:03,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:45:03,025 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 116 [2023-08-24 08:45:03,040 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,044 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,049 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,052 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,056 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,060 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,064 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,092 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:03,093 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 08:45:03,227 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,230 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,234 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,237 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,242 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,246 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,256 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 08:45:03,263 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,266 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:03,321 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 08:45:03,425 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:03,426 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 216 treesize of output 156 [2023-08-24 08:45:03,557 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,563 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:03,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:03,571 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 08:45:03,604 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 08:45:03,629 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:03,631 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:03,633 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 08:45:03,822 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 08:45:03,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233495789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:03,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:03,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 08:45:03,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248643748] [2023-08-24 08:45:03,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:03,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:45:03,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:03,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:45:03,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=812, Unknown=2, NotChecked=118, Total=1056 [2023-08-24 08:45:03,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 695 [2023-08-24 08:45:03,828 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 08:45:03,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:03,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 695 [2023-08-24 08:45:03,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:04,851 INFO L124 PetriNetUnfolderBase]: 2524/3682 cut-off events. [2023-08-24 08:45:04,852 INFO L125 PetriNetUnfolderBase]: For 36058/36058 co-relation queries the response was YES. [2023-08-24 08:45:04,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24348 conditions, 3682 events. 2524/3682 cut-off events. For 36058/36058 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 16942 event pairs, 199 based on Foata normal form. 1/3683 useless extension candidates. Maximal degree in co-relation 24244. Up to 2865 conditions per place. [2023-08-24 08:45:04,878 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 193 selfloop transitions, 141 changer transitions 1/335 dead transitions. [2023-08-24 08:45:04,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 335 transitions, 5011 flow [2023-08-24 08:45:04,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:45:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:45:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2993 transitions. [2023-08-24 08:45:04,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3312672938572219 [2023-08-24 08:45:04,883 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2993 transitions. [2023-08-24 08:45:04,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2993 transitions. [2023-08-24 08:45:04,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:04,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2993 transitions. [2023-08-24 08:45:04,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 230.23076923076923) internal successors, (2993), 13 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:04,890 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 08:45:04,891 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 08:45:04,891 INFO L175 Difference]: Start difference. First operand has 160 places, 258 transitions, 3557 flow. Second operand 13 states and 2993 transitions. [2023-08-24 08:45:04,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 335 transitions, 5011 flow [2023-08-24 08:45:04,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 335 transitions, 4677 flow, removed 52 selfloop flow, removed 7 redundant places. [2023-08-24 08:45:04,983 INFO L231 Difference]: Finished difference. Result has 168 places, 284 transitions, 4082 flow [2023-08-24 08:45:04,984 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=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4082, PETRI_PLACES=168, PETRI_TRANSITIONS=284} [2023-08-24 08:45:04,984 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 136 predicate places. [2023-08-24 08:45:04,984 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 284 transitions, 4082 flow [2023-08-24 08:45:04,985 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 08:45:04,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:04,985 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 08:45:04,992 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 08:45:05,189 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 08:45:05,189 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 08:45:05,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1608304625, now seen corresponding path program 14 times [2023-08-24 08:45:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:05,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893899665] [2023-08-24 08:45:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:05,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:05,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:06,148 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 08:45:06,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893899665] [2023-08-24 08:45:06,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893899665] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:06,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612675382] [2023-08-24 08:45:06,148 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:45:06,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:06,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:06,149 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 08:45:06,150 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 08:45:06,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:45:06,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:06,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-24 08:45:06,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:06,320 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 08:45:06,370 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:45:06,370 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 08:45:06,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:45:06,553 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 08:45:06,704 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:45:06,704 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 08:45:06,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:06,801 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 08:45:06,880 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 08:45:06,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:09,439 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 08:45:09,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:09,470 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 08:45:09,489 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:09,489 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 08:45:11,063 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:11,064 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 08:45:11,087 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:11,087 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 08:45:11,166 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 08:45:11,174 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:45:11,182 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 08:45:11,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:45:11,187 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 08:45:11,207 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:11,207 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 08:45:11,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:11,327 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 08:45:11,410 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 08:45:11,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:11,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:11,428 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 08:45:11,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:11,615 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 08:45:11,684 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 08:45:11,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612675382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:11,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:11,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 33 [2023-08-24 08:45:11,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211301381] [2023-08-24 08:45:11,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:11,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:45:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:11,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:45:11,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=992, Unknown=1, NotChecked=64, Total=1190 [2023-08-24 08:45:11,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:45:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 284 transitions, 4082 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 08:45:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:45:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:13,421 INFO L124 PetriNetUnfolderBase]: 2612/3811 cut-off events. [2023-08-24 08:45:13,421 INFO L125 PetriNetUnfolderBase]: For 37687/37687 co-relation queries the response was YES. [2023-08-24 08:45:13,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26082 conditions, 3811 events. 2612/3811 cut-off events. For 37687/37687 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17692 event pairs, 267 based on Foata normal form. 1/3812 useless extension candidates. Maximal degree in co-relation 25973. Up to 3210 conditions per place. [2023-08-24 08:45:13,449 INFO L140 encePairwiseOnDemand]: 680/695 looper letters, 210 selfloop transitions, 127 changer transitions 1/338 dead transitions. [2023-08-24 08:45:13,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 338 transitions, 5204 flow [2023-08-24 08:45:13,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:45:13,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:45:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2713 transitions. [2023-08-24 08:45:13,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30027670171555065 [2023-08-24 08:45:13,453 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2713 transitions. [2023-08-24 08:45:13,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2713 transitions. [2023-08-24 08:45:13,453 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:13,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2713 transitions. [2023-08-24 08:45:13,456 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 08:45:13,460 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 08:45:13,460 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 08:45:13,460 INFO L175 Difference]: Start difference. First operand has 168 places, 284 transitions, 4082 flow. Second operand 13 states and 2713 transitions. [2023-08-24 08:45:13,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 338 transitions, 5204 flow [2023-08-24 08:45:13,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 338 transitions, 4908 flow, removed 105 selfloop flow, removed 6 redundant places. [2023-08-24 08:45:13,584 INFO L231 Difference]: Finished difference. Result has 176 places, 290 transitions, 4225 flow [2023-08-24 08:45:13,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=3828, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4225, PETRI_PLACES=176, PETRI_TRANSITIONS=290} [2023-08-24 08:45:13,585 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 144 predicate places. [2023-08-24 08:45:13,585 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 290 transitions, 4225 flow [2023-08-24 08:45:13,586 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 08:45:13,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:13,586 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 08:45:13,591 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 08:45:13,788 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 08:45:13,789 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 08:45:13,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:13,789 INFO L85 PathProgramCache]: Analyzing trace with hash 306301773, now seen corresponding path program 15 times [2023-08-24 08:45:13,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:13,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057126356] [2023-08-24 08:45:13,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:13,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:14,276 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 08:45:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057126356] [2023-08-24 08:45:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057126356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586814497] [2023-08-24 08:45:14,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:45:14,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:14,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:14,277 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 08:45:14,278 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 08:45:14,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:45:14,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:14,427 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:14,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:14,640 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:14,640 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 08:45:14,653 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 08:45:14,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:14,771 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:14,772 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 08:45:15,004 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 08:45:15,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586814497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:15,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:15,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-24 08:45:15,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742398057] [2023-08-24 08:45:15,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:15,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:45:15,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:15,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:45:15,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:45:15,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:45:15,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 290 transitions, 4225 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 08:45:15,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:15,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:45:15,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:15,932 INFO L124 PetriNetUnfolderBase]: 2871/4190 cut-off events. [2023-08-24 08:45:15,932 INFO L125 PetriNetUnfolderBase]: For 43826/43826 co-relation queries the response was YES. [2023-08-24 08:45:15,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29421 conditions, 4190 events. 2871/4190 cut-off events. For 43826/43826 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19701 event pairs, 792 based on Foata normal form. 1/4191 useless extension candidates. Maximal degree in co-relation 29306. Up to 3842 conditions per place. [2023-08-24 08:45:15,963 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 299 selfloop transitions, 70 changer transitions 1/370 dead transitions. [2023-08-24 08:45:15,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 370 transitions, 6042 flow [2023-08-24 08:45:15,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:45:15,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:45:15,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2241 transitions. [2023-08-24 08:45:15,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35827338129496406 [2023-08-24 08:45:15,965 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2241 transitions. [2023-08-24 08:45:15,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2241 transitions. [2023-08-24 08:45:15,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:15,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2241 transitions. [2023-08-24 08:45:15,968 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 08:45:15,970 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 08:45:15,970 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 08:45:15,970 INFO L175 Difference]: Start difference. First operand has 176 places, 290 transitions, 4225 flow. Second operand 9 states and 2241 transitions. [2023-08-24 08:45:15,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 370 transitions, 6042 flow [2023-08-24 08:45:16,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 370 transitions, 5666 flow, removed 45 selfloop flow, removed 10 redundant places. [2023-08-24 08:45:16,073 INFO L231 Difference]: Finished difference. Result has 178 places, 326 transitions, 4873 flow [2023-08-24 08:45:16,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4873, PETRI_PLACES=178, PETRI_TRANSITIONS=326} [2023-08-24 08:45:16,074 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 146 predicate places. [2023-08-24 08:45:16,074 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 326 transitions, 4873 flow [2023-08-24 08:45:16,074 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 08:45:16,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:16,074 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 08:45:16,079 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 08:45:16,274 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 08:45:16,275 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 08:45:16,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1761101207, now seen corresponding path program 16 times [2023-08-24 08:45:16,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:16,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243198081] [2023-08-24 08:45:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:16,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:17,070 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 08:45:17,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:17,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243198081] [2023-08-24 08:45:17,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243198081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:17,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836531725] [2023-08-24 08:45:17,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:45:17,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:17,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:17,072 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 08:45:17,074 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 08:45:17,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:45:17,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:17,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:17,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:17,468 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:17,468 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 08:45:17,484 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 08:45:17,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:17,626 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:17,626 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 08:45:17,783 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 08:45:17,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836531725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:17,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:17,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 24 [2023-08-24 08:45:17,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197287129] [2023-08-24 08:45:17,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:17,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:45:17,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:17,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:45:17,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:45:17,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 08:45:17,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 326 transitions, 4873 flow. Second operand has 26 states, 26 states have (on average 205.5) internal successors, (5343), 26 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:17,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:17,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 08:45:17,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:18,893 INFO L124 PetriNetUnfolderBase]: 3065/4475 cut-off events. [2023-08-24 08:45:18,894 INFO L125 PetriNetUnfolderBase]: For 47172/47172 co-relation queries the response was YES. [2023-08-24 08:45:18,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31290 conditions, 4475 events. 3065/4475 cut-off events. For 47172/47172 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 21281 event pairs, 873 based on Foata normal form. 1/4476 useless extension candidates. Maximal degree in co-relation 31177. Up to 4202 conditions per place. [2023-08-24 08:45:18,929 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 323 selfloop transitions, 60 changer transitions 1/384 dead transitions. [2023-08-24 08:45:18,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 384 transitions, 6229 flow [2023-08-24 08:45:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:45:18,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:45:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2538 transitions. [2023-08-24 08:45:18,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3043165467625899 [2023-08-24 08:45:18,932 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2538 transitions. [2023-08-24 08:45:18,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2538 transitions. [2023-08-24 08:45:18,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:18,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2538 transitions. [2023-08-24 08:45:18,934 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 08:45:18,937 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 08:45:18,938 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 08:45:18,938 INFO L175 Difference]: Start difference. First operand has 178 places, 326 transitions, 4873 flow. Second operand 12 states and 2538 transitions. [2023-08-24 08:45:18,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 384 transitions, 6229 flow [2023-08-24 08:45:19,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 384 transitions, 6038 flow, removed 91 selfloop flow, removed 1 redundant places. [2023-08-24 08:45:19,077 INFO L231 Difference]: Finished difference. Result has 192 places, 342 transitions, 5165 flow [2023-08-24 08:45:19,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=4689, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5165, PETRI_PLACES=192, PETRI_TRANSITIONS=342} [2023-08-24 08:45:19,078 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 160 predicate places. [2023-08-24 08:45:19,078 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 342 transitions, 5165 flow [2023-08-24 08:45:19,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 205.5) internal successors, (5343), 26 states have internal predecessors, (5343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:19,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:19,079 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 08:45:19,084 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 08:45:19,283 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 08:45:19,283 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 08:45:19,283 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:19,283 INFO L85 PathProgramCache]: Analyzing trace with hash -831520087, now seen corresponding path program 17 times [2023-08-24 08:45:19,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:19,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131794204] [2023-08-24 08:45:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:19,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:19,732 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 08:45:19,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:19,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131794204] [2023-08-24 08:45:19,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131794204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:19,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032672234] [2023-08-24 08:45:19,733 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:45:19,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:19,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:19,734 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 08:45:19,734 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 08:45:19,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:45:19,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:19,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:19,874 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:20,074 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:20,074 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 08:45:20,092 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 08:45:20,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:20,206 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:20,207 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 08:45:20,416 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 08:45:20,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032672234] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:20,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:20,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-24 08:45:20,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251458371] [2023-08-24 08:45:20,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:20,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:45:20,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:45:20,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:45:20,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:45:20,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 342 transitions, 5165 flow. Second operand has 18 states, 18 states have (on average 240.94444444444446) internal successors, (4337), 18 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:20,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:20,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:45:20,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:21,388 INFO L124 PetriNetUnfolderBase]: 3231/4720 cut-off events. [2023-08-24 08:45:21,388 INFO L125 PetriNetUnfolderBase]: For 52351/52351 co-relation queries the response was YES. [2023-08-24 08:45:21,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33053 conditions, 4720 events. 3231/4720 cut-off events. For 52351/52351 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22852 event pairs, 933 based on Foata normal form. 1/4721 useless extension candidates. Maximal degree in co-relation 32930. Up to 4404 conditions per place. [2023-08-24 08:45:21,426 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 342 selfloop transitions, 66 changer transitions 1/409 dead transitions. [2023-08-24 08:45:21,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 409 transitions, 6805 flow [2023-08-24 08:45:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:45:21,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:45:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2243 transitions. [2023-08-24 08:45:21,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3585931254996003 [2023-08-24 08:45:21,428 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2243 transitions. [2023-08-24 08:45:21,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2243 transitions. [2023-08-24 08:45:21,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:21,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2243 transitions. [2023-08-24 08:45:21,430 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 08:45:21,433 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 08:45:21,433 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 08:45:21,433 INFO L175 Difference]: Start difference. First operand has 192 places, 342 transitions, 5165 flow. Second operand 9 states and 2243 transitions. [2023-08-24 08:45:21,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 409 transitions, 6805 flow [2023-08-24 08:45:21,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 409 transitions, 6561 flow, removed 111 selfloop flow, removed 4 redundant places. [2023-08-24 08:45:21,575 INFO L231 Difference]: Finished difference. Result has 199 places, 363 transitions, 5616 flow [2023-08-24 08:45:21,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=4921, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5616, PETRI_PLACES=199, PETRI_TRANSITIONS=363} [2023-08-24 08:45:21,576 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 167 predicate places. [2023-08-24 08:45:21,576 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 363 transitions, 5616 flow [2023-08-24 08:45:21,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 240.94444444444446) internal successors, (4337), 18 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:21,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:21,577 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 08:45:21,583 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 08:45:21,777 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 08:45:21,777 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 08:45:21,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:21,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1961992107, now seen corresponding path program 18 times [2023-08-24 08:45:21,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:21,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474677266] [2023-08-24 08:45:21,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:21,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:22,575 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 08:45:22,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474677266] [2023-08-24 08:45:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474677266] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228011992] [2023-08-24 08:45:22,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:45:22,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:22,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:22,576 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 08:45:22,577 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 08:45:22,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:45:22,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:22,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:45:22,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:22,761 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 08:45:22,799 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:45:22,800 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 08:45:22,964 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:45:22,964 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 08:45:23,164 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:23,164 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 08:45:23,231 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 08:45:23,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:26,225 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:26,225 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 08:45:26,450 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:26,615 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 08:45:26,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228011992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:26,616 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:26,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 25 [2023-08-24 08:45:26,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876537855] [2023-08-24 08:45:26,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:26,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:45:26,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:45:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=598, Unknown=0, NotChecked=0, Total=702 [2023-08-24 08:45:26,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:45:26,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 363 transitions, 5616 flow. Second operand has 27 states, 27 states have (on average 203.5185185185185) internal successors, (5495), 27 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:26,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:26,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:45:26,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:27,973 INFO L124 PetriNetUnfolderBase]: 3319/4849 cut-off events. [2023-08-24 08:45:27,973 INFO L125 PetriNetUnfolderBase]: For 54184/54184 co-relation queries the response was YES. [2023-08-24 08:45:27,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33712 conditions, 4849 events. 3319/4849 cut-off events. For 54184/54184 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 23581 event pairs, 998 based on Foata normal form. 1/4850 useless extension candidates. Maximal degree in co-relation 33590. Up to 4625 conditions per place. [2023-08-24 08:45:28,010 INFO L140 encePairwiseOnDemand]: 680/695 looper letters, 340 selfloop transitions, 68 changer transitions 1/409 dead transitions. [2023-08-24 08:45:28,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 409 transitions, 6875 flow [2023-08-24 08:45:28,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:45:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:45:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2709 transitions. [2023-08-24 08:45:28,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2998339789706696 [2023-08-24 08:45:28,013 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2709 transitions. [2023-08-24 08:45:28,013 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2709 transitions. [2023-08-24 08:45:28,013 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:28,014 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2709 transitions. [2023-08-24 08:45:28,016 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 08:45:28,019 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 08:45:28,020 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 08:45:28,020 INFO L175 Difference]: Start difference. First operand has 199 places, 363 transitions, 5616 flow. Second operand 13 states and 2709 transitions. [2023-08-24 08:45:28,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 409 transitions, 6875 flow [2023-08-24 08:45:28,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 409 transitions, 6595 flow, removed 123 selfloop flow, removed 2 redundant places. [2023-08-24 08:45:28,161 INFO L231 Difference]: Finished difference. Result has 212 places, 370 transitions, 5665 flow [2023-08-24 08:45:28,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5665, PETRI_PLACES=212, PETRI_TRANSITIONS=370} [2023-08-24 08:45:28,162 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 180 predicate places. [2023-08-24 08:45:28,162 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 370 transitions, 5665 flow [2023-08-24 08:45:28,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 203.5185185185185) internal successors, (5495), 27 states have internal predecessors, (5495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:28,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:28,163 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 08:45:28,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-24 08:45:28,364 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 08:45:28,365 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 08:45:28,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:28,365 INFO L85 PathProgramCache]: Analyzing trace with hash 835299553, now seen corresponding path program 19 times [2023-08-24 08:45:28,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:28,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941773047] [2023-08-24 08:45:28,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:28,823 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 08:45:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:28,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941773047] [2023-08-24 08:45:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941773047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:28,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501804800] [2023-08-24 08:45:28,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:45:28,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:28,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:28,825 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 08:45:28,826 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 08:45:28,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:28,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:28,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:29,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:29,179 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 08:45:29,191 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 08:45:29,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:29,318 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:29,318 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 08:45:29,512 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 08:45:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501804800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:29,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:29,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:45:29,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926135926] [2023-08-24 08:45:29,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:29,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:45:29,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:45:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:45:29,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:45:29,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 370 transitions, 5665 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 08:45:29,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:29,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:45:29,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:30,570 INFO L124 PetriNetUnfolderBase]: 3419/4996 cut-off events. [2023-08-24 08:45:30,570 INFO L125 PetriNetUnfolderBase]: For 54026/54026 co-relation queries the response was YES. [2023-08-24 08:45:30,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34075 conditions, 4996 events. 3419/4996 cut-off events. For 54026/54026 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 24429 event pairs, 1032 based on Foata normal form. 1/4997 useless extension candidates. Maximal degree in co-relation 33943. Up to 4793 conditions per place. [2023-08-24 08:45:30,610 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 360 selfloop transitions, 54 changer transitions 1/415 dead transitions. [2023-08-24 08:45:30,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 415 transitions, 6906 flow [2023-08-24 08:45:30,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:45:30,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:45:30,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2233 transitions. [2023-08-24 08:45:30,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569944044764189 [2023-08-24 08:45:30,612 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2233 transitions. [2023-08-24 08:45:30,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2233 transitions. [2023-08-24 08:45:30,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:30,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2233 transitions. [2023-08-24 08:45:30,614 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 08:45:30,617 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 08:45:30,617 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 08:45:30,617 INFO L175 Difference]: Start difference. First operand has 212 places, 370 transitions, 5665 flow. Second operand 9 states and 2233 transitions. [2023-08-24 08:45:30,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 415 transitions, 6906 flow [2023-08-24 08:45:30,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 415 transitions, 6685 flow, removed 48 selfloop flow, removed 9 redundant places. [2023-08-24 08:45:30,745 INFO L231 Difference]: Finished difference. Result has 214 places, 380 transitions, 5748 flow [2023-08-24 08:45:30,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5444, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5748, PETRI_PLACES=214, PETRI_TRANSITIONS=380} [2023-08-24 08:45:30,746 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 182 predicate places. [2023-08-24 08:45:30,746 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 380 transitions, 5748 flow [2023-08-24 08:45:30,747 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 08:45:30,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:30,747 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 08:45:30,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 08:45:30,947 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 08:45:30,947 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 08:45:30,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1369689263, now seen corresponding path program 20 times [2023-08-24 08:45:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:30,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655799795] [2023-08-24 08:45:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:30,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:31,861 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 08:45:31,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:31,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655799795] [2023-08-24 08:45:31,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655799795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:31,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957149819] [2023-08-24 08:45:31,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:45:31,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:31,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:31,863 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 08:45:31,863 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 08:45:32,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:45:32,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:32,024 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:45:32,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:32,062 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:45:32,062 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 08:45:32,109 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:45:32,109 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 08:45:32,150 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:45:32,150 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 08:45:32,328 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:45:32,328 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 08:45:32,470 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:32,470 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 08:45:32,528 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 08:45:32,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:34,453 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:34,453 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 08:45:34,540 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:34,799 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 08:45:34,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957149819] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:34,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:34,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-24 08:45:34,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572322295] [2023-08-24 08:45:34,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:34,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:45:34,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:34,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:45:34,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:45:34,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 08:45:34,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 380 transitions, 5748 flow. Second operand has 29 states, 29 states have (on average 204.13793103448276) internal successors, (5920), 29 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:34,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:34,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 08:45:34,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:36,280 INFO L124 PetriNetUnfolderBase]: 3499/5113 cut-off events. [2023-08-24 08:45:36,280 INFO L125 PetriNetUnfolderBase]: For 58513/58513 co-relation queries the response was YES. [2023-08-24 08:45:36,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34933 conditions, 5113 events. 3499/5113 cut-off events. For 58513/58513 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 25076 event pairs, 1078 based on Foata normal form. 1/5114 useless extension candidates. Maximal degree in co-relation 34804. Up to 4924 conditions per place. [2023-08-24 08:45:36,320 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 359 selfloop transitions, 57 changer transitions 1/417 dead transitions. [2023-08-24 08:45:36,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 417 transitions, 6990 flow [2023-08-24 08:45:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:45:36,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:45:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2512 transitions. [2023-08-24 08:45:36,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011990407673861 [2023-08-24 08:45:36,323 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2512 transitions. [2023-08-24 08:45:36,323 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2512 transitions. [2023-08-24 08:45:36,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:36,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2512 transitions. [2023-08-24 08:45:36,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.33333333333334) internal successors, (2512), 12 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:36,329 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 08:45:36,329 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 08:45:36,329 INFO L175 Difference]: Start difference. First operand has 214 places, 380 transitions, 5748 flow. Second operand 12 states and 2512 transitions. [2023-08-24 08:45:36,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 417 transitions, 6990 flow [2023-08-24 08:45:36,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 417 transitions, 6782 flow, removed 55 selfloop flow, removed 5 redundant places. [2023-08-24 08:45:36,464 INFO L231 Difference]: Finished difference. Result has 222 places, 386 transitions, 5854 flow [2023-08-24 08:45:36,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5540, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5854, PETRI_PLACES=222, PETRI_TRANSITIONS=386} [2023-08-24 08:45:36,465 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 190 predicate places. [2023-08-24 08:45:36,465 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 386 transitions, 5854 flow [2023-08-24 08:45:36,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 204.13793103448276) internal successors, (5920), 29 states have internal predecessors, (5920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:45:36,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:36,466 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 08:45:36,473 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 08:45:36,666 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 08:45:36,666 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 08:45:36,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1869401065, now seen corresponding path program 21 times [2023-08-24 08:45:36,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:36,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163507099] [2023-08-24 08:45:36,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:36,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:37,126 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 08:45:37,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163507099] [2023-08-24 08:45:37,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163507099] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:37,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299739643] [2023-08-24 08:45:37,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:45:37,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:37,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:37,128 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 08:45:37,129 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 08:45:37,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:45:37,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:37,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:37,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:37,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:37,523 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 08:45:37,537 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 08:45:37,537 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:37,676 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:37,676 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 08:45:37,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:45:37,807 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:37,807 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 08:45:37,887 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 08:45:37,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299739643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:37,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:37,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:45:37,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083688193] [2023-08-24 08:45:37,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:37,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:45:37,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:37,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:45:37,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:45:37,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:45:37,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 386 transitions, 5854 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 08:45:37,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:37,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:45:37,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:38,950 INFO L124 PetriNetUnfolderBase]: 3589/5246 cut-off events. [2023-08-24 08:45:38,950 INFO L125 PetriNetUnfolderBase]: For 61724/61724 co-relation queries the response was YES. [2023-08-24 08:45:38,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35695 conditions, 5246 events. 3589/5246 cut-off events. For 61724/61724 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 25928 event pairs, 1105 based on Foata normal form. 1/5247 useless extension candidates. Maximal degree in co-relation 35561. Up to 5018 conditions per place. [2023-08-24 08:45:38,991 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 370 selfloop transitions, 62 changer transitions 1/433 dead transitions. [2023-08-24 08:45:38,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 433 transitions, 7145 flow [2023-08-24 08:45:38,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:45:38,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:45:38,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2237 transitions. [2023-08-24 08:45:38,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576338928856915 [2023-08-24 08:45:38,994 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2237 transitions. [2023-08-24 08:45:38,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2237 transitions. [2023-08-24 08:45:38,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:38,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2237 transitions. [2023-08-24 08:45:38,996 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 08:45:39,005 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 08:45:39,006 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 08:45:39,006 INFO L175 Difference]: Start difference. First operand has 222 places, 386 transitions, 5854 flow. Second operand 9 states and 2237 transitions. [2023-08-24 08:45:39,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 433 transitions, 7145 flow [2023-08-24 08:45:39,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 433 transitions, 6920 flow, removed 80 selfloop flow, removed 8 redundant places. [2023-08-24 08:45:39,153 INFO L231 Difference]: Finished difference. Result has 224 places, 392 transitions, 5907 flow [2023-08-24 08:45:39,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5629, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5907, PETRI_PLACES=224, PETRI_TRANSITIONS=392} [2023-08-24 08:45:39,153 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 192 predicate places. [2023-08-24 08:45:39,154 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 392 transitions, 5907 flow [2023-08-24 08:45:39,154 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 08:45:39,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:39,154 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 08:45:39,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 08:45:39,357 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 08:45:39,358 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 08:45:39,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1021178593, now seen corresponding path program 22 times [2023-08-24 08:45:39,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:39,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737289841] [2023-08-24 08:45:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:39,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:39,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:39,813 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 08:45:39,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737289841] [2023-08-24 08:45:39,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737289841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:39,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982112357] [2023-08-24 08:45:39,814 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:45:39,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:39,815 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 08:45:39,816 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 08:45:39,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:45:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:39,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:39,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:40,208 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:40,209 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 08:45:40,220 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 08:45:40,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:40,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:40,321 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 08:45:40,407 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:45:40,407 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 08:45:40,488 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 08:45:40,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982112357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:40,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:40,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:45:40,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797599737] [2023-08-24 08:45:40,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:40,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:45:40,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:40,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:45:40,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:45:40,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:45:40,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 392 transitions, 5907 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 08:45:40,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:40,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:45:40,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:41,581 INFO L124 PetriNetUnfolderBase]: 3689/5393 cut-off events. [2023-08-24 08:45:41,581 INFO L125 PetriNetUnfolderBase]: For 64750/64750 co-relation queries the response was YES. [2023-08-24 08:45:41,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36663 conditions, 5393 events. 3689/5393 cut-off events. For 64750/64750 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 26810 event pairs, 1155 based on Foata normal form. 1/5394 useless extension candidates. Maximal degree in co-relation 36529. Up to 5214 conditions per place. [2023-08-24 08:45:41,621 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 380 selfloop transitions, 51 changer transitions 1/432 dead transitions. [2023-08-24 08:45:41,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 432 transitions, 7147 flow [2023-08-24 08:45:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:45:41,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:45:41,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2227 transitions. [2023-08-24 08:45:41,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35603517186251 [2023-08-24 08:45:41,625 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2227 transitions. [2023-08-24 08:45:41,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2227 transitions. [2023-08-24 08:45:41,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:41,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2227 transitions. [2023-08-24 08:45:41,626 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 08:45:41,629 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 08:45:41,629 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 08:45:41,629 INFO L175 Difference]: Start difference. First operand has 224 places, 392 transitions, 5907 flow. Second operand 9 states and 2227 transitions. [2023-08-24 08:45:41,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 432 transitions, 7147 flow [2023-08-24 08:45:41,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 432 transitions, 6930 flow, removed 50 selfloop flow, removed 6 redundant places. [2023-08-24 08:45:41,762 INFO L231 Difference]: Finished difference. Result has 230 places, 402 transitions, 6020 flow [2023-08-24 08:45:41,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5692, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6020, PETRI_PLACES=230, PETRI_TRANSITIONS=402} [2023-08-24 08:45:41,763 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 198 predicate places. [2023-08-24 08:45:41,763 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 402 transitions, 6020 flow [2023-08-24 08:45:41,764 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 08:45:41,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:41,764 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 08:45:41,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 08:45:41,965 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 08:45:41,965 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 08:45:41,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:41,965 INFO L85 PathProgramCache]: Analyzing trace with hash -355464987, now seen corresponding path program 23 times [2023-08-24 08:45:41,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:41,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604522224] [2023-08-24 08:45:41,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:41,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:41,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:42,412 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 08:45:42,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604522224] [2023-08-24 08:45:42,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604522224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:42,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610061612] [2023-08-24 08:45:42,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:45:42,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:42,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:42,414 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 08:45:42,415 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 08:45:42,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:45:42,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:42,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:45:42,569 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:42,771 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:42,771 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 08:45:42,783 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 08:45:42,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:42,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:42,882 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 08:45:42,982 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 08:45:42,983 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 08:45:43,064 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 08:45:43,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610061612] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:43,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:45:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455498216] [2023-08-24 08:45:43,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:43,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:45:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:45:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:45:43,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:45:43,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 402 transitions, 6020 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 08:45:43,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:43,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:45:43,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:44,206 INFO L124 PetriNetUnfolderBase]: 3789/5540 cut-off events. [2023-08-24 08:45:44,207 INFO L125 PetriNetUnfolderBase]: For 69017/69017 co-relation queries the response was YES. [2023-08-24 08:45:44,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37626 conditions, 5540 events. 3789/5540 cut-off events. For 69017/69017 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27649 event pairs, 1207 based on Foata normal form. 1/5541 useless extension candidates. Maximal degree in co-relation 37488. Up to 5361 conditions per place. [2023-08-24 08:45:44,331 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 392 selfloop transitions, 51 changer transitions 1/444 dead transitions. [2023-08-24 08:45:44,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 444 transitions, 7331 flow [2023-08-24 08:45:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:45:44,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:45:44,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2229 transitions. [2023-08-24 08:45:44,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563549160671463 [2023-08-24 08:45:44,338 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2229 transitions. [2023-08-24 08:45:44,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2229 transitions. [2023-08-24 08:45:44,338 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:44,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2229 transitions. [2023-08-24 08:45:44,340 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 08:45:44,343 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 08:45:44,343 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 08:45:44,343 INFO L175 Difference]: Start difference. First operand has 230 places, 402 transitions, 6020 flow. Second operand 9 states and 2229 transitions. [2023-08-24 08:45:44,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 444 transitions, 7331 flow [2023-08-24 08:45:44,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 444 transitions, 7153 flow, removed 56 selfloop flow, removed 3 redundant places. [2023-08-24 08:45:44,577 INFO L231 Difference]: Finished difference. Result has 239 places, 412 transitions, 6196 flow [2023-08-24 08:45:44,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5843, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6196, PETRI_PLACES=239, PETRI_TRANSITIONS=412} [2023-08-24 08:45:44,578 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 207 predicate places. [2023-08-24 08:45:44,578 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 412 transitions, 6196 flow [2023-08-24 08:45:44,579 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 08:45:44,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:44,579 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 08:45:44,592 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 08:45:44,784 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 08:45:44,784 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 08:45:44,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:44,784 INFO L85 PathProgramCache]: Analyzing trace with hash -61178583, now seen corresponding path program 24 times [2023-08-24 08:45:44,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:44,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972581096] [2023-08-24 08:45:44,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:44,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:45,810 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 08:45:45,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:45,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972581096] [2023-08-24 08:45:45,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972581096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:45,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864512005] [2023-08-24 08:45:45,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:45:45,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:45,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:45,811 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 08:45:45,812 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 08:45:45,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:45:45,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:45,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:45:45,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:46,017 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:45:46,017 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 08:45:46,064 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:45:46,064 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 08:45:46,120 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:45:46,121 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 08:45:46,405 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 08:45:46,515 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 08:45:46,543 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 08:45:46,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:46,653 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:46,654 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 08:45:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:47,594 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:47,637 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:45:47,637 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 08:45:48,074 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 08:45:48,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864512005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:48,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:48,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-08-24 08:45:48,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412245396] [2023-08-24 08:45:48,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:48,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 08:45:48,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:48,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 08:45:48,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 08:45:48,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 08:45:48,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 412 transitions, 6196 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 08:45:48,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:48,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 08:45:48,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:49,781 INFO L124 PetriNetUnfolderBase]: 3887/5683 cut-off events. [2023-08-24 08:45:49,781 INFO L125 PetriNetUnfolderBase]: For 75263/75263 co-relation queries the response was YES. [2023-08-24 08:45:49,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38783 conditions, 5683 events. 3887/5683 cut-off events. For 75263/75263 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28561 event pairs, 1230 based on Foata normal form. 1/5684 useless extension candidates. Maximal degree in co-relation 38641. Up to 5508 conditions per place. [2023-08-24 08:45:49,834 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 395 selfloop transitions, 55 changer transitions 1/451 dead transitions. [2023-08-24 08:45:49,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 451 transitions, 7591 flow [2023-08-24 08:45:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:45:49,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:45:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2712 transitions. [2023-08-24 08:45:49,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3001660210293304 [2023-08-24 08:45:49,836 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2712 transitions. [2023-08-24 08:45:49,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2712 transitions. [2023-08-24 08:45:49,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:49,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2712 transitions. [2023-08-24 08:45:49,839 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 08:45:49,842 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 08:45:49,843 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 08:45:49,843 INFO L175 Difference]: Start difference. First operand has 239 places, 412 transitions, 6196 flow. Second operand 13 states and 2712 transitions. [2023-08-24 08:45:49,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 451 transitions, 7591 flow [2023-08-24 08:45:50,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 451 transitions, 7360 flow, removed 65 selfloop flow, removed 5 redundant places. [2023-08-24 08:45:50,048 INFO L231 Difference]: Finished difference. Result has 248 places, 421 transitions, 6381 flow [2023-08-24 08:45:50,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=5965, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6381, PETRI_PLACES=248, PETRI_TRANSITIONS=421} [2023-08-24 08:45:50,049 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 216 predicate places. [2023-08-24 08:45:50,049 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 421 transitions, 6381 flow [2023-08-24 08:45:50,050 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 08:45:50,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:50,050 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 08:45:50,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 08:45:50,252 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 08:45:50,252 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 08:45:50,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1804623529, now seen corresponding path program 25 times [2023-08-24 08:45:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:50,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10223971] [2023-08-24 08:45:50,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:51,294 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 08:45:51,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10223971] [2023-08-24 08:45:51,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10223971] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:51,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382330749] [2023-08-24 08:45:51,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:45:51,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:51,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:51,295 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 08:45:51,297 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 08:45:51,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:51,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:45:51,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:51,482 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:45:51,482 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 08:45:51,522 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:45:51,522 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 08:45:51,572 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:45:51,572 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 08:45:51,730 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:45:51,730 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 08:45:51,831 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:51,832 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 08:45:51,860 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 08:45:51,860 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:51,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:51,961 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 195 treesize of output 215 [2023-08-24 08:45:52,834 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:52,834 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:52,882 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:45:52,882 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 08:45:53,297 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 08:45:53,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382330749] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:53,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:53,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-08-24 08:45:53,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444029976] [2023-08-24 08:45:53,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:45:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:53,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:45:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:45:53,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:45:53,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 421 transitions, 6381 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 08:45:53,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:53,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:45:53,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:55,006 INFO L124 PetriNetUnfolderBase]: 3967/5800 cut-off events. [2023-08-24 08:45:55,006 INFO L125 PetriNetUnfolderBase]: For 81421/81421 co-relation queries the response was YES. [2023-08-24 08:45:55,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39650 conditions, 5800 events. 3967/5800 cut-off events. For 81421/81421 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 29263 event pairs, 1266 based on Foata normal form. 1/5801 useless extension candidates. Maximal degree in co-relation 39502. Up to 5635 conditions per place. [2023-08-24 08:45:55,055 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 397 selfloop transitions, 57 changer transitions 1/455 dead transitions. [2023-08-24 08:45:55,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 455 transitions, 7719 flow [2023-08-24 08:45:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:45:55,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:45:55,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3101 transitions. [2023-08-24 08:45:55,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974580335731415 [2023-08-24 08:45:55,058 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3101 transitions. [2023-08-24 08:45:55,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3101 transitions. [2023-08-24 08:45:55,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:55,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3101 transitions. [2023-08-24 08:45:55,061 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 08:45:55,065 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 08:45:55,065 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 08:45:55,065 INFO L175 Difference]: Start difference. First operand has 248 places, 421 transitions, 6381 flow. Second operand 15 states and 3101 transitions. [2023-08-24 08:45:55,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 455 transitions, 7719 flow [2023-08-24 08:45:55,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 455 transitions, 7420 flow, removed 128 selfloop flow, removed 6 redundant places. [2023-08-24 08:45:55,289 INFO L231 Difference]: Finished difference. Result has 258 places, 427 transitions, 6450 flow [2023-08-24 08:45:55,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6082, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6450, PETRI_PLACES=258, PETRI_TRANSITIONS=427} [2023-08-24 08:45:55,290 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 226 predicate places. [2023-08-24 08:45:55,290 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 427 transitions, 6450 flow [2023-08-24 08:45:55,291 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 08:45:55,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:55,291 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 08:45:55,296 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 08:45:55,491 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 08:45:55,491 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 08:45:55,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:55,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1985228243, now seen corresponding path program 26 times [2023-08-24 08:45:55,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:55,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605627954] [2023-08-24 08:45:55,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:55,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:45:55,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:45:56,313 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 08:45:56,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:45:56,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605627954] [2023-08-24 08:45:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605627954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:45:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661786121] [2023-08-24 08:45:56,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:45:56,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:45:56,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:45:56,315 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 08:45:56,315 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 08:45:56,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:45:56,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:45:56,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:45:56,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:45:56,548 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:45:56,548 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 08:45:56,588 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:45:56,589 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 08:45:56,631 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:45:56,631 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 08:45:56,813 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:45:56,813 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 08:45:56,910 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:56,911 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 08:45:56,979 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 08:45:56,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:45:57,491 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:45:57,492 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 08:45:57,603 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:45:57,624 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 08:45:57,624 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 08:45:57,884 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 08:45:57,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661786121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:45:57,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:45:57,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-24 08:45:57,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740521159] [2023-08-24 08:45:57,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:45:57,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:45:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:45:57,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:45:57,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:45:57,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 08:45:57,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 427 transitions, 6450 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 08:45:57,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:45:57,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 08:45:57,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:45:59,498 INFO L124 PetriNetUnfolderBase]: 4047/5917 cut-off events. [2023-08-24 08:45:59,498 INFO L125 PetriNetUnfolderBase]: For 85838/85838 co-relation queries the response was YES. [2023-08-24 08:45:59,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40398 conditions, 5917 events. 4047/5917 cut-off events. For 85838/85838 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29948 event pairs, 1300 based on Foata normal form. 1/5918 useless extension candidates. Maximal degree in co-relation 40245. Up to 5752 conditions per place. [2023-08-24 08:45:59,549 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 406 selfloop transitions, 54 changer transitions 1/461 dead transitions. [2023-08-24 08:45:59,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 461 transitions, 7814 flow [2023-08-24 08:45:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:45:59,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:45:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2508 transitions. [2023-08-24 08:45:59,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30071942446043165 [2023-08-24 08:45:59,551 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2508 transitions. [2023-08-24 08:45:59,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2508 transitions. [2023-08-24 08:45:59,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:45:59,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2508 transitions. [2023-08-24 08:45:59,553 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 08:45:59,556 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 08:45:59,557 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 08:45:59,557 INFO L175 Difference]: Start difference. First operand has 258 places, 427 transitions, 6450 flow. Second operand 12 states and 2508 transitions. [2023-08-24 08:45:59,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 461 transitions, 7814 flow [2023-08-24 08:45:59,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 461 transitions, 7528 flow, removed 108 selfloop flow, removed 11 redundant places. [2023-08-24 08:45:59,759 INFO L231 Difference]: Finished difference. Result has 260 places, 433 transitions, 6538 flow [2023-08-24 08:45:59,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6164, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6538, PETRI_PLACES=260, PETRI_TRANSITIONS=433} [2023-08-24 08:45:59,760 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 228 predicate places. [2023-08-24 08:45:59,760 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 433 transitions, 6538 flow [2023-08-24 08:45:59,760 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 08:45:59,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:45:59,760 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 08:45:59,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 08:45:59,981 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 08:45:59,981 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 08:45:59,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:45:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1078402715, now seen corresponding path program 27 times [2023-08-24 08:45:59,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:45:59,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234784642] [2023-08-24 08:45:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:45:59,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:00,499 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 08:46:00,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234784642] [2023-08-24 08:46:00,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234784642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:00,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427067835] [2023-08-24 08:46:00,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:46:00,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:00,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:00,500 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 08:46:00,501 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 08:46:00,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:46:00,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:00,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:46:00,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:00,721 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 08:46:00,760 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:46:00,760 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 08:46:00,974 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:46:00,974 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 08:46:01,075 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:01,076 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 08:46:01,110 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 08:46:01,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:02,274 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:02,275 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 08:46:02,508 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:02,530 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:46:02,531 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 08:46:02,731 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 08:46:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427067835] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:02,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:02,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 08:46:02,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034191121] [2023-08-24 08:46:02,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:02,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:46:02,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:46:02,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:46:02,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:46:02,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 433 transitions, 6538 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 08:46:02,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:02,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:46:02,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:04,359 INFO L124 PetriNetUnfolderBase]: 4149/6066 cut-off events. [2023-08-24 08:46:04,359 INFO L125 PetriNetUnfolderBase]: For 91217/91217 co-relation queries the response was YES. [2023-08-24 08:46:04,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41618 conditions, 6066 events. 4149/6066 cut-off events. For 91217/91217 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 30914 event pairs, 1341 based on Foata normal form. 1/6067 useless extension candidates. Maximal degree in co-relation 41468. Up to 5887 conditions per place. [2023-08-24 08:46:04,422 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 419 selfloop transitions, 54 changer transitions 1/474 dead transitions. [2023-08-24 08:46:04,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 474 transitions, 8046 flow [2023-08-24 08:46:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:46:04,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:46:04,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2386 transitions. [2023-08-24 08:46:04,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3120994113799869 [2023-08-24 08:46:04,425 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2386 transitions. [2023-08-24 08:46:04,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2386 transitions. [2023-08-24 08:46:04,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:04,425 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2386 transitions. [2023-08-24 08:46:04,427 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 08:46:04,429 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 08:46:04,430 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 08:46:04,430 INFO L175 Difference]: Start difference. First operand has 260 places, 433 transitions, 6538 flow. Second operand 11 states and 2386 transitions. [2023-08-24 08:46:04,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 474 transitions, 8046 flow [2023-08-24 08:46:04,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 474 transitions, 7760 flow, removed 113 selfloop flow, removed 8 redundant places. [2023-08-24 08:46:04,716 INFO L231 Difference]: Finished difference. Result has 265 places, 442 transitions, 6724 flow [2023-08-24 08:46:04,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6724, PETRI_PLACES=265, PETRI_TRANSITIONS=442} [2023-08-24 08:46:04,717 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 233 predicate places. [2023-08-24 08:46:04,717 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 442 transitions, 6724 flow [2023-08-24 08:46:04,717 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 08:46:04,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:04,717 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 08:46:04,728 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 08:46:04,923 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 08:46:04,923 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 08:46:04,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -552024449, now seen corresponding path program 28 times [2023-08-24 08:46:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111831219] [2023-08-24 08:46:04,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:04,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:04,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:05,363 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 08:46:05,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:05,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111831219] [2023-08-24 08:46:05,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111831219] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:05,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190441887] [2023-08-24 08:46:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:46:05,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:05,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:05,364 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 08:46:05,373 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 08:46:05,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:46:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:05,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:46:05,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:05,769 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:05,770 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 08:46:05,781 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 08:46:05,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:05,881 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:05,881 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 08:46:06,044 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 08:46:06,044 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 08:46:06,127 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 08:46:06,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190441887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:06,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:06,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-24 08:46:06,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860547120] [2023-08-24 08:46:06,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:06,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:46:06,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:06,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:46:06,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:46:06,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:46:06,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 442 transitions, 6724 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 08:46:06,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:06,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:46:06,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:07,356 INFO L124 PetriNetUnfolderBase]: 4239/6199 cut-off events. [2023-08-24 08:46:07,356 INFO L125 PetriNetUnfolderBase]: For 94522/94522 co-relation queries the response was YES. [2023-08-24 08:46:07,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42407 conditions, 6199 events. 4239/6199 cut-off events. For 94522/94522 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 31762 event pairs, 1384 based on Foata normal form. 1/6200 useless extension candidates. Maximal degree in co-relation 42253. Up to 6016 conditions per place. [2023-08-24 08:46:07,425 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 430 selfloop transitions, 51 changer transitions 1/482 dead transitions. [2023-08-24 08:46:07,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 482 transitions, 8098 flow [2023-08-24 08:46:07,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:46:07,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:46:07,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2231 transitions. [2023-08-24 08:46:07,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566746602717826 [2023-08-24 08:46:07,427 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2231 transitions. [2023-08-24 08:46:07,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2231 transitions. [2023-08-24 08:46:07,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:07,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2231 transitions. [2023-08-24 08:46:07,429 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 08:46:07,431 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 08:46:07,432 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 08:46:07,432 INFO L175 Difference]: Start difference. First operand has 265 places, 442 transitions, 6724 flow. Second operand 9 states and 2231 transitions. [2023-08-24 08:46:07,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 482 transitions, 8098 flow [2023-08-24 08:46:07,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 482 transitions, 7806 flow, removed 118 selfloop flow, removed 6 redundant places. [2023-08-24 08:46:07,691 INFO L231 Difference]: Finished difference. Result has 269 places, 448 transitions, 6735 flow [2023-08-24 08:46:07,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6432, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6735, PETRI_PLACES=269, PETRI_TRANSITIONS=448} [2023-08-24 08:46:07,691 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 237 predicate places. [2023-08-24 08:46:07,691 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 448 transitions, 6735 flow [2023-08-24 08:46:07,692 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 08:46:07,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:07,692 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 08:46:07,699 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 08:46:07,892 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 08:46:07,892 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 08:46:07,893 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:07,893 INFO L85 PathProgramCache]: Analyzing trace with hash 315669393, now seen corresponding path program 29 times [2023-08-24 08:46:07,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:07,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757405246] [2023-08-24 08:46:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:07,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:07,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:08,610 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 08:46:08,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757405246] [2023-08-24 08:46:08,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757405246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:08,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091378888] [2023-08-24 08:46:08,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:46:08,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:08,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:08,611 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 08:46:08,613 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 08:46:08,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:46:08,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:08,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:46:08,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:08,836 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:46:08,836 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 08:46:08,870 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:46:08,870 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 08:46:08,917 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:46:08,918 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 08:46:09,064 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:46:09,064 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 08:46:09,225 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:09,225 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 08:46:09,244 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 08:46:09,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:09,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:09,368 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 08:46:10,023 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:10,024 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:10,067 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:46:10,067 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 08:46:10,430 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 08:46:10,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091378888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:10,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:10,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-08-24 08:46:10,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488567703] [2023-08-24 08:46:10,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:10,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:46:10,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:10,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:46:10,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:46:10,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 695 [2023-08-24 08:46:10,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 448 transitions, 6735 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 08:46:10,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:10,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 695 [2023-08-24 08:46:10,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:12,435 INFO L124 PetriNetUnfolderBase]: 4463/6525 cut-off events. [2023-08-24 08:46:12,436 INFO L125 PetriNetUnfolderBase]: For 105123/105123 co-relation queries the response was YES. [2023-08-24 08:46:12,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46180 conditions, 6525 events. 4463/6525 cut-off events. For 105123/105123 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 33506 event pairs, 1415 based on Foata normal form. 1/6526 useless extension candidates. Maximal degree in co-relation 45492. Up to 6245 conditions per place. [2023-08-24 08:46:12,502 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 443 selfloop transitions, 108 changer transitions 1/552 dead transitions. [2023-08-24 08:46:12,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 552 transitions, 9901 flow [2023-08-24 08:46:12,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:46:12,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:46:12,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3860 transitions. [2023-08-24 08:46:12,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29231351760696705 [2023-08-24 08:46:12,506 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3860 transitions. [2023-08-24 08:46:12,506 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3860 transitions. [2023-08-24 08:46:12,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:12,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3860 transitions. [2023-08-24 08:46:12,509 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 08:46:12,513 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 08:46:12,514 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 08:46:12,514 INFO L175 Difference]: Start difference. First operand has 269 places, 448 transitions, 6735 flow. Second operand 19 states and 3860 transitions. [2023-08-24 08:46:12,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 552 transitions, 9901 flow [2023-08-24 08:46:12,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 552 transitions, 9577 flow, removed 74 selfloop flow, removed 6 redundant places. [2023-08-24 08:46:12,764 INFO L231 Difference]: Finished difference. Result has 285 places, 506 transitions, 8376 flow [2023-08-24 08:46:12,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=6493, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=8376, PETRI_PLACES=285, PETRI_TRANSITIONS=506} [2023-08-24 08:46:12,764 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 253 predicate places. [2023-08-24 08:46:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 506 transitions, 8376 flow [2023-08-24 08:46:12,765 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 08:46:12,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:12,765 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 08:46:12,770 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 08:46:12,965 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 08:46:12,965 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 08:46:12,965 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:12,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1770913655, now seen corresponding path program 30 times [2023-08-24 08:46:12,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:12,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248043075] [2023-08-24 08:46:12,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:12,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:13,505 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 08:46:13,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248043075] [2023-08-24 08:46:13,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248043075] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:13,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790764845] [2023-08-24 08:46:13,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:46:13,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:13,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:13,506 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 08:46:13,507 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 08:46:13,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:46:13,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:13,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:46:13,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:13,717 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:46:13,718 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 08:46:13,759 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:46:13,759 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 08:46:13,812 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:46:13,812 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 08:46:14,016 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 08:46:14,151 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 08:46:14,174 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 08:46:14,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:14,286 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:14,286 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 08:46:14,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:14,933 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:46:14,933 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 08:46:15,281 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 08:46:15,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790764845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:15,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:15,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 08:46:15,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436627724] [2023-08-24 08:46:15,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:15,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:46:15,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:15,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:46:15,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:46:15,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:46:15,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 506 transitions, 8376 flow. Second operand has 30 states, 30 states have (on average 226.26666666666668) internal successors, (6788), 30 states have internal predecessors, (6788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:15,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:15,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:46:15,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:16,868 INFO L124 PetriNetUnfolderBase]: 4607/6734 cut-off events. [2023-08-24 08:46:16,869 INFO L125 PetriNetUnfolderBase]: For 122013/122013 co-relation queries the response was YES. [2023-08-24 08:46:16,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48258 conditions, 6734 events. 4607/6734 cut-off events. For 122013/122013 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34770 event pairs, 1429 based on Foata normal form. 1/6735 useless extension candidates. Maximal degree in co-relation 48097. Up to 6358 conditions per place. [2023-08-24 08:46:16,945 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 434 selfloop transitions, 113 changer transitions 1/548 dead transitions. [2023-08-24 08:46:16,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 548 transitions, 10111 flow [2023-08-24 08:46:16,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:46:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:46:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2777 transitions. [2023-08-24 08:46:16,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3329736211031175 [2023-08-24 08:46:16,948 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2777 transitions. [2023-08-24 08:46:16,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2777 transitions. [2023-08-24 08:46:16,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:16,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2777 transitions. [2023-08-24 08:46:16,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.41666666666666) internal successors, (2777), 12 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:16,953 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 08:46:16,953 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 08:46:16,954 INFO L175 Difference]: Start difference. First operand has 285 places, 506 transitions, 8376 flow. Second operand 12 states and 2777 transitions. [2023-08-24 08:46:16,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 548 transitions, 10111 flow [2023-08-24 08:46:17,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 548 transitions, 9566 flow, removed 206 selfloop flow, removed 8 redundant places. [2023-08-24 08:46:17,454 INFO L231 Difference]: Finished difference. Result has 290 places, 516 transitions, 8516 flow [2023-08-24 08:46:17,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=7831, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8516, PETRI_PLACES=290, PETRI_TRANSITIONS=516} [2023-08-24 08:46:17,455 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 258 predicate places. [2023-08-24 08:46:17,455 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 516 transitions, 8516 flow [2023-08-24 08:46:17,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 226.26666666666668) internal successors, (6788), 30 states have internal predecessors, (6788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:17,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:17,456 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 08:46:17,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 08:46:17,660 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 08:46:17,661 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 08:46:17,661 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:17,662 INFO L85 PathProgramCache]: Analyzing trace with hash -28600303, now seen corresponding path program 31 times [2023-08-24 08:46:17,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:17,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121711408] [2023-08-24 08:46:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:17,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:17,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:18,377 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 08:46:18,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:18,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121711408] [2023-08-24 08:46:18,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121711408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:18,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910154490] [2023-08-24 08:46:18,377 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:46:18,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:18,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:18,378 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 08:46:18,379 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 08:46:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:18,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:46:18,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:18,574 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 08:46:18,614 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:46:18,614 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 08:46:18,768 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:46:18,769 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 08:46:18,921 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:18,921 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 08:46:19,023 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 08:46:19,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:20,432 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:20,432 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 08:46:20,586 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:20,756 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 08:46:20,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910154490] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:20,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:20,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 26 [2023-08-24 08:46:20,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68767633] [2023-08-24 08:46:20,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:20,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 08:46:20,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:20,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 08:46:20,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2023-08-24 08:46:20,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:46:20,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 516 transitions, 8516 flow. Second operand has 28 states, 28 states have (on average 203.21428571428572) internal successors, (5690), 28 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:20,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:20,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:46:20,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:22,527 INFO L124 PetriNetUnfolderBase]: 4751/6943 cut-off events. [2023-08-24 08:46:22,527 INFO L125 PetriNetUnfolderBase]: For 133090/133090 co-relation queries the response was YES. [2023-08-24 08:46:22,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50125 conditions, 6943 events. 4751/6943 cut-off events. For 133090/133090 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 36171 event pairs, 1488 based on Foata normal form. 1/6944 useless extension candidates. Maximal degree in co-relation 49964. Up to 6546 conditions per place. [2023-08-24 08:46:22,605 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 442 selfloop transitions, 121 changer transitions 1/564 dead transitions. [2023-08-24 08:46:22,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 564 transitions, 10341 flow [2023-08-24 08:46:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:46:22,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:46:22,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2707 transitions. [2023-08-24 08:46:22,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2996126175982291 [2023-08-24 08:46:22,607 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2707 transitions. [2023-08-24 08:46:22,607 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2707 transitions. [2023-08-24 08:46:22,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:22,608 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2707 transitions. [2023-08-24 08:46:22,609 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 208.23076923076923) internal successors, (2707), 13 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:22,613 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 08:46:22,613 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 08:46:22,613 INFO L175 Difference]: Start difference. First operand has 290 places, 516 transitions, 8516 flow. Second operand 13 states and 2707 transitions. [2023-08-24 08:46:22,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 564 transitions, 10341 flow [2023-08-24 08:46:23,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 564 transitions, 9833 flow, removed 191 selfloop flow, removed 7 redundant places. [2023-08-24 08:46:23,059 INFO L231 Difference]: Finished difference. Result has 297 places, 526 transitions, 8729 flow [2023-08-24 08:46:23,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8008, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8729, PETRI_PLACES=297, PETRI_TRANSITIONS=526} [2023-08-24 08:46:23,059 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 265 predicate places. [2023-08-24 08:46:23,059 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 526 transitions, 8729 flow [2023-08-24 08:46:23,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 203.21428571428572) internal successors, (5690), 28 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:23,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:23,060 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 08:46:23,065 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 08:46:23,260 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 08:46:23,260 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 08:46:23,261 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:23,261 INFO L85 PathProgramCache]: Analyzing trace with hash -608584663, now seen corresponding path program 32 times [2023-08-24 08:46:23,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:23,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776011179] [2023-08-24 08:46:23,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:23,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:24,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 08:46:24,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776011179] [2023-08-24 08:46:24,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776011179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:24,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120945944] [2023-08-24 08:46:24,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:46:24,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:24,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:24,074 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 08:46:24,078 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 08:46:24,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:46:24,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:24,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:46:24,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:24,310 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:46:24,310 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 08:46:24,352 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:46:24,352 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 08:46:24,392 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:46:24,393 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 08:46:24,572 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:46:24,572 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 08:46:24,670 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:24,670 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 08:46:24,749 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 08:46:24,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:24,964 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:24,964 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 08:46:25,098 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:25,119 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:46:25,119 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 08:46:25,388 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 08:46:25,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120945944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:25,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:25,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-24 08:46:25,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147068142] [2023-08-24 08:46:25,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:25,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:46:25,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:46:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:46:25,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 695 [2023-08-24 08:46:25,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 526 transitions, 8729 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 08:46:25,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:25,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 695 [2023-08-24 08:46:25,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:27,515 INFO L124 PetriNetUnfolderBase]: 4831/7060 cut-off events. [2023-08-24 08:46:27,515 INFO L125 PetriNetUnfolderBase]: For 132968/132968 co-relation queries the response was YES. [2023-08-24 08:46:27,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50607 conditions, 7060 events. 4831/7060 cut-off events. For 132968/132968 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 36894 event pairs, 1577 based on Foata normal form. 1/7061 useless extension candidates. Maximal degree in co-relation 50441. Up to 6818 conditions per place. [2023-08-24 08:46:27,584 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 460 selfloop transitions, 97 changer transitions 1/558 dead transitions. [2023-08-24 08:46:27,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 558 transitions, 10326 flow [2023-08-24 08:46:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:46:27,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:46:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2398 transitions. [2023-08-24 08:46:27,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2875299760191847 [2023-08-24 08:46:27,586 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2398 transitions. [2023-08-24 08:46:27,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2398 transitions. [2023-08-24 08:46:27,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:27,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2398 transitions. [2023-08-24 08:46:27,588 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 08:46:27,591 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 08:46:27,592 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 08:46:27,592 INFO L175 Difference]: Start difference. First operand has 297 places, 526 transitions, 8729 flow. Second operand 12 states and 2398 transitions. [2023-08-24 08:46:27,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 558 transitions, 10326 flow [2023-08-24 08:46:27,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 558 transitions, 9776 flow, removed 205 selfloop flow, removed 8 redundant places. [2023-08-24 08:46:27,926 INFO L231 Difference]: Finished difference. Result has 302 places, 532 transitions, 8701 flow [2023-08-24 08:46:27,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8179, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8701, PETRI_PLACES=302, PETRI_TRANSITIONS=532} [2023-08-24 08:46:27,927 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 270 predicate places. [2023-08-24 08:46:27,927 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 532 transitions, 8701 flow [2023-08-24 08:46:27,928 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 08:46:27,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:27,928 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 08:46:27,933 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 08:46:28,128 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 08:46:28,128 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 08:46:28,129 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:28,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1364541791, now seen corresponding path program 33 times [2023-08-24 08:46:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:28,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429743706] [2023-08-24 08:46:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:28,683 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 08:46:28,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:28,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429743706] [2023-08-24 08:46:28,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429743706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:28,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888987635] [2023-08-24 08:46:28,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:46:28,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:28,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:28,684 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 08:46:28,684 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 08:46:28,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:46:28,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:28,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:46:28,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:28,928 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:46:28,928 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 08:46:28,961 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:46:28,961 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 08:46:29,008 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:46:29,008 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 08:46:29,254 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 08:46:29,383 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 08:46:29,407 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 08:46:29,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:29,504 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:29,504 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 08:46:30,151 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:30,151 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:30,195 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:46:30,195 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 08:46:30,604 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 08:46:30,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888987635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:30,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:30,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:46:30,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601120412] [2023-08-24 08:46:30,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:30,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:46:30,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:30,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:46:30,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:46:30,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:46:30,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 532 transitions, 8701 flow. Second operand has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:30,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:30,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:46:30,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:32,342 INFO L124 PetriNetUnfolderBase]: 4921/7191 cut-off events. [2023-08-24 08:46:32,342 INFO L125 PetriNetUnfolderBase]: For 131549/131549 co-relation queries the response was YES. [2023-08-24 08:46:32,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50817 conditions, 7191 events. 4921/7191 cut-off events. For 131549/131549 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37722 event pairs, 1607 based on Foata normal form. 1/7192 useless extension candidates. Maximal degree in co-relation 50651. Up to 6949 conditions per place. [2023-08-24 08:46:32,431 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 468 selfloop transitions, 98 changer transitions 1/567 dead transitions. [2023-08-24 08:46:32,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 567 transitions, 10355 flow [2023-08-24 08:46:32,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:46:32,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:46:32,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2769 transitions. [2023-08-24 08:46:32,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320143884892086 [2023-08-24 08:46:32,434 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2769 transitions. [2023-08-24 08:46:32,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2769 transitions. [2023-08-24 08:46:32,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:32,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2769 transitions. [2023-08-24 08:46:32,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.75) internal successors, (2769), 12 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:32,439 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 08:46:32,439 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 08:46:32,439 INFO L175 Difference]: Start difference. First operand has 302 places, 532 transitions, 8701 flow. Second operand 12 states and 2769 transitions. [2023-08-24 08:46:32,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 567 transitions, 10355 flow [2023-08-24 08:46:32,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 567 transitions, 9960 flow, removed 144 selfloop flow, removed 7 redundant places. [2023-08-24 08:46:32,874 INFO L231 Difference]: Finished difference. Result has 309 places, 541 transitions, 8882 flow [2023-08-24 08:46:32,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8306, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8882, PETRI_PLACES=309, PETRI_TRANSITIONS=541} [2023-08-24 08:46:32,875 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 277 predicate places. [2023-08-24 08:46:32,875 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 541 transitions, 8882 flow [2023-08-24 08:46:32,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:32,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:32,876 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 08:46:32,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 08:46:33,081 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 08:46:33,081 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 08:46:33,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:33,081 INFO L85 PathProgramCache]: Analyzing trace with hash -502217385, now seen corresponding path program 34 times [2023-08-24 08:46:33,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:33,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791618372] [2023-08-24 08:46:33,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:33,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:33,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:33,643 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 08:46:33,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791618372] [2023-08-24 08:46:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791618372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:33,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821046456] [2023-08-24 08:46:33,644 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:46:33,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:33,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:33,645 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 08:46:33,645 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 08:46:33,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:46:33,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:33,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:46:33,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:33,858 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:46:33,858 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 08:46:33,893 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:46:33,893 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 08:46:33,951 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:46:33,951 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 08:46:34,180 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 08:46:34,365 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 08:46:34,381 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 08:46:34,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:34,503 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:34,504 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 08:46:35,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:35,020 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:35,064 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:46:35,065 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 08:46:35,422 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 08:46:35,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821046456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:35,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:35,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:46:35,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390603954] [2023-08-24 08:46:35,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:35,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:46:35,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:35,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:46:35,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:46:35,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:46:35,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 541 transitions, 8882 flow. Second operand has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:35,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:35,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:46:35,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:37,195 INFO L124 PetriNetUnfolderBase]: 5001/7308 cut-off events. [2023-08-24 08:46:37,195 INFO L125 PetriNetUnfolderBase]: For 138151/138151 co-relation queries the response was YES. [2023-08-24 08:46:37,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51781 conditions, 7308 events. 5001/7308 cut-off events. For 138151/138151 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 38489 event pairs, 1620 based on Foata normal form. 1/7309 useless extension candidates. Maximal degree in co-relation 51610. Up to 7034 conditions per place. [2023-08-24 08:46:37,280 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 466 selfloop transitions, 107 changer transitions 1/574 dead transitions. [2023-08-24 08:46:37,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 574 transitions, 10537 flow [2023-08-24 08:46:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:46:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:46:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2771 transitions. [2023-08-24 08:46:37,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225419664268585 [2023-08-24 08:46:37,282 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2771 transitions. [2023-08-24 08:46:37,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2771 transitions. [2023-08-24 08:46:37,283 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:37,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2771 transitions. [2023-08-24 08:46:37,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.91666666666666) internal successors, (2771), 12 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:37,288 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 08:46:37,288 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 08:46:37,288 INFO L175 Difference]: Start difference. First operand has 309 places, 541 transitions, 8882 flow. Second operand 12 states and 2771 transitions. [2023-08-24 08:46:37,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 574 transitions, 10537 flow [2023-08-24 08:46:37,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 574 transitions, 10118 flow, removed 154 selfloop flow, removed 7 redundant places. [2023-08-24 08:46:37,735 INFO L231 Difference]: Finished difference. Result has 315 places, 547 transitions, 9029 flow [2023-08-24 08:46:37,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8463, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9029, PETRI_PLACES=315, PETRI_TRANSITIONS=547} [2023-08-24 08:46:37,736 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 283 predicate places. [2023-08-24 08:46:37,736 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 547 transitions, 9029 flow [2023-08-24 08:46:37,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:37,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:37,737 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 08:46:37,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 08:46:37,942 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 08:46:37,942 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 08:46:37,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash 654060393, now seen corresponding path program 35 times [2023-08-24 08:46:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313355288] [2023-08-24 08:46:37,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:37,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:39,000 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 08:46:39,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313355288] [2023-08-24 08:46:39,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313355288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:39,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735767427] [2023-08-24 08:46:39,001 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:46:39,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:39,002 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 08:46:39,008 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 08:46:39,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:46:39,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:39,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:46:39,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:39,230 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:46:39,230 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 08:46:39,271 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:46:39,271 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 08:46:39,322 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:46:39,322 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 08:46:39,498 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:46:39,498 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 08:46:39,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:39,656 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 08:46:39,668 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 08:46:39,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:39,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:39,789 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 08:46:40,499 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:40,500 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:40,544 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:46:40,545 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 08:46:41,010 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 08:46:41,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735767427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:41,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:41,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-08-24 08:46:41,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277439364] [2023-08-24 08:46:41,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:41,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:46:41,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:41,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:46:41,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:46:41,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:46:41,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 547 transitions, 9029 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 08:46:41,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:41,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:46:41,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:43,210 INFO L124 PetriNetUnfolderBase]: 5089/7437 cut-off events. [2023-08-24 08:46:43,210 INFO L125 PetriNetUnfolderBase]: For 141383/141383 co-relation queries the response was YES. [2023-08-24 08:46:43,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52553 conditions, 7437 events. 5089/7437 cut-off events. For 141383/141383 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 39288 event pairs, 1662 based on Foata normal form. 1/7438 useless extension candidates. Maximal degree in co-relation 52379. Up to 7185 conditions per place. [2023-08-24 08:46:43,298 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 479 selfloop transitions, 101 changer transitions 1/581 dead transitions. [2023-08-24 08:46:43,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 581 transitions, 10602 flow [2023-08-24 08:46:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:46:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:46:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3101 transitions. [2023-08-24 08:46:43,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974580335731415 [2023-08-24 08:46:43,301 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3101 transitions. [2023-08-24 08:46:43,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3101 transitions. [2023-08-24 08:46:43,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:43,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3101 transitions. [2023-08-24 08:46:43,303 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 08:46:43,307 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 08:46:43,307 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 08:46:43,307 INFO L175 Difference]: Start difference. First operand has 315 places, 547 transitions, 9029 flow. Second operand 15 states and 3101 transitions. [2023-08-24 08:46:43,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 581 transitions, 10602 flow [2023-08-24 08:46:43,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 581 transitions, 10159 flow, removed 156 selfloop flow, removed 8 redundant places. [2023-08-24 08:46:43,717 INFO L231 Difference]: Finished difference. Result has 323 places, 553 transitions, 9037 flow [2023-08-24 08:46:43,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8586, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9037, PETRI_PLACES=323, PETRI_TRANSITIONS=553} [2023-08-24 08:46:43,718 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 291 predicate places. [2023-08-24 08:46:43,718 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 553 transitions, 9037 flow [2023-08-24 08:46:43,719 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 08:46:43,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:43,719 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 08:46:43,724 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 08:46:43,923 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 08:46:43,924 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 08:46:43,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash -103490327, now seen corresponding path program 36 times [2023-08-24 08:46:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:43,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589659337] [2023-08-24 08:46:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:44,425 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 08:46:44,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:44,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589659337] [2023-08-24 08:46:44,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589659337] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:44,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336619259] [2023-08-24 08:46:44,426 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:46:44,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:44,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:44,427 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 08:46:44,427 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 08:46:44,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:46:44,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:44,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:46:44,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:44,647 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 08:46:44,674 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:46:44,674 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 08:46:44,885 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:46:44,885 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 08:46:45,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:45,042 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 08:46:45,074 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 08:46:45,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:46,221 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:46,222 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 08:46:46,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:46,558 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 08:46:46,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336619259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:46,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:46,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 08:46:46,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308545234] [2023-08-24 08:46:46,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:46,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:46:46,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:46:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:46:46,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:46:46,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 553 transitions, 9037 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 08:46:46,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:46,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:46:46,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:48,535 INFO L124 PetriNetUnfolderBase]: 5177/7566 cut-off events. [2023-08-24 08:46:48,536 INFO L125 PetriNetUnfolderBase]: For 144050/144050 co-relation queries the response was YES. [2023-08-24 08:46:48,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53266 conditions, 7566 events. 5177/7566 cut-off events. For 144050/144050 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 40145 event pairs, 1677 based on Foata normal form. 1/7567 useless extension candidates. Maximal degree in co-relation 53087. Up to 7259 conditions per place. [2023-08-24 08:46:48,612 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 483 selfloop transitions, 112 changer transitions 1/596 dead transitions. [2023-08-24 08:46:48,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 596 transitions, 10699 flow [2023-08-24 08:46:48,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:46:48,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:46:48,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2553 transitions. [2023-08-24 08:46:48,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.333943754087639 [2023-08-24 08:46:48,615 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2553 transitions. [2023-08-24 08:46:48,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2553 transitions. [2023-08-24 08:46:48,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:48,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2553 transitions. [2023-08-24 08:46:48,616 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 08:46:48,619 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 08:46:48,619 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 08:46:48,619 INFO L175 Difference]: Start difference. First operand has 323 places, 553 transitions, 9037 flow. Second operand 11 states and 2553 transitions. [2023-08-24 08:46:48,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 596 transitions, 10699 flow [2023-08-24 08:46:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 596 transitions, 10332 flow, removed 98 selfloop flow, removed 11 redundant places. [2023-08-24 08:46:49,036 INFO L231 Difference]: Finished difference. Result has 324 places, 559 transitions, 9144 flow [2023-08-24 08:46:49,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8670, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9144, PETRI_PLACES=324, PETRI_TRANSITIONS=559} [2023-08-24 08:46:49,037 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 292 predicate places. [2023-08-24 08:46:49,038 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 559 transitions, 9144 flow [2023-08-24 08:46:49,038 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 08:46:49,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:49,038 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 08:46:49,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-08-24 08:46:49,243 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 08:46:49,243 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 08:46:49,244 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:49,244 INFO L85 PathProgramCache]: Analyzing trace with hash 824619131, now seen corresponding path program 37 times [2023-08-24 08:46:49,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:49,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573332862] [2023-08-24 08:46:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:49,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:49,968 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 08:46:49,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:49,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573332862] [2023-08-24 08:46:49,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573332862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:49,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248286188] [2023-08-24 08:46:49,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:46:49,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:49,970 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 08:46:49,970 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 08:46:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:50,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:46:50,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:50,395 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:50,395 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 08:46:50,407 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 08:46:50,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:50,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:50,523 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 08:46:50,656 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:46:50,656 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 08:46:50,749 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 08:46:50,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248286188] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:50,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:50,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 22 [2023-08-24 08:46:50,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430963795] [2023-08-24 08:46:50,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:50,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:46:50,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:50,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:46:50,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:46:50,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 08:46:50,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 559 transitions, 9144 flow. Second operand has 24 states, 24 states have (on average 205.83333333333334) internal successors, (4940), 24 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:50,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:50,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 08:46:50,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:52,733 INFO L124 PetriNetUnfolderBase]: 5267/7699 cut-off events. [2023-08-24 08:46:52,733 INFO L125 PetriNetUnfolderBase]: For 151912/151912 co-relation queries the response was YES. [2023-08-24 08:46:52,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54157 conditions, 7699 events. 5267/7699 cut-off events. For 151912/151912 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 41021 event pairs, 1733 based on Foata normal form. 1/7700 useless extension candidates. Maximal degree in co-relation 53978. Up to 7439 conditions per place. [2023-08-24 08:46:52,829 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 497 selfloop transitions, 99 changer transitions 1/597 dead transitions. [2023-08-24 08:46:52,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 597 transitions, 10785 flow [2023-08-24 08:46:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:46:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:46:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2526 transitions. [2023-08-24 08:46:52,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30287769784172663 [2023-08-24 08:46:52,832 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2526 transitions. [2023-08-24 08:46:52,832 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2526 transitions. [2023-08-24 08:46:52,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:52,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2526 transitions. [2023-08-24 08:46:52,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 210.5) internal successors, (2526), 12 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:52,837 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 08:46:52,837 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 08:46:52,837 INFO L175 Difference]: Start difference. First operand has 324 places, 559 transitions, 9144 flow. Second operand 12 states and 2526 transitions. [2023-08-24 08:46:52,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 597 transitions, 10785 flow [2023-08-24 08:46:53,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 597 transitions, 10374 flow, removed 98 selfloop flow, removed 8 redundant places. [2023-08-24 08:46:53,281 INFO L231 Difference]: Finished difference. Result has 329 places, 565 transitions, 9192 flow [2023-08-24 08:46:53,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8733, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9192, PETRI_PLACES=329, PETRI_TRANSITIONS=565} [2023-08-24 08:46:53,282 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 297 predicate places. [2023-08-24 08:46:53,282 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 565 transitions, 9192 flow [2023-08-24 08:46:53,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 205.83333333333334) internal successors, (4940), 24 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:46:53,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:53,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:46:53,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-24 08:46:53,483 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 08:46:53,483 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 08:46:53,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:53,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1539858673, now seen corresponding path program 38 times [2023-08-24 08:46:53,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:53,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681864767] [2023-08-24 08:46:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:54,029 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 08:46:54,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681864767] [2023-08-24 08:46:54,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681864767] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:54,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076452629] [2023-08-24 08:46:54,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:46:54,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:54,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:54,030 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 08:46:54,034 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 08:46:54,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:46:54,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:54,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:46:54,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:54,259 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 08:46:54,298 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:46:54,298 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 08:46:54,475 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:46:54,476 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 08:46:54,652 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:54,653 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 08:46:54,719 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 08:46:54,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:54,906 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:54,906 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 08:46:55,123 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:46:55,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:46:55,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:46:55,142 INFO L322 Elim1Store]: treesize reduction 19, result has 55.8 percent of original size [2023-08-24 08:46:55,142 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 32 [2023-08-24 08:46:55,331 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 08:46:55,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076452629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:46:55,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:46:55,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 21 [2023-08-24 08:46:55,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780255180] [2023-08-24 08:46:55,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:46:55,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:46:55,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:46:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:46:55,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:46:55,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:46:55,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 565 transitions, 9192 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 08:46:55,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:46:55,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:46:55,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:46:57,229 INFO L124 PetriNetUnfolderBase]: 5355/7828 cut-off events. [2023-08-24 08:46:57,230 INFO L125 PetriNetUnfolderBase]: For 157810/157810 co-relation queries the response was YES. [2023-08-24 08:46:57,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54931 conditions, 7828 events. 5355/7828 cut-off events. For 157810/157810 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 41843 event pairs, 1783 based on Foata normal form. 1/7829 useless extension candidates. Maximal degree in co-relation 54748. Up to 7572 conditions per place. [2023-08-24 08:46:57,317 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 502 selfloop transitions, 98 changer transitions 1/601 dead transitions. [2023-08-24 08:46:57,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 601 transitions, 10840 flow [2023-08-24 08:46:57,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:46:57,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:46:57,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2384 transitions. [2023-08-24 08:46:57,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118378024852845 [2023-08-24 08:46:57,319 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2384 transitions. [2023-08-24 08:46:57,319 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2384 transitions. [2023-08-24 08:46:57,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:46:57,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2384 transitions. [2023-08-24 08:46:57,321 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 08:46:57,323 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 08:46:57,323 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 08:46:57,324 INFO L175 Difference]: Start difference. First operand has 329 places, 565 transitions, 9192 flow. Second operand 11 states and 2384 transitions. [2023-08-24 08:46:57,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 601 transitions, 10840 flow [2023-08-24 08:46:57,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 601 transitions, 10436 flow, removed 107 selfloop flow, removed 9 redundant places. [2023-08-24 08:46:57,870 INFO L231 Difference]: Finished difference. Result has 332 places, 571 transitions, 9251 flow [2023-08-24 08:46:57,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8788, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9251, PETRI_PLACES=332, PETRI_TRANSITIONS=571} [2023-08-24 08:46:57,870 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 300 predicate places. [2023-08-24 08:46:57,870 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 571 transitions, 9251 flow [2023-08-24 08:46:57,871 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 08:46:57,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:46:57,871 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 08:46:57,878 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 08:46:58,071 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 08:46:58,071 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 08:46:58,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:46:58,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1238648023, now seen corresponding path program 39 times [2023-08-24 08:46:58,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:46:58,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508843038] [2023-08-24 08:46:58,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:46:58,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:46:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:46:58,911 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 08:46:58,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:46:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508843038] [2023-08-24 08:46:58,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508843038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:46:58,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341631541] [2023-08-24 08:46:58,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:46:58,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:46:58,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:46:58,912 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 08:46:58,914 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 08:46:59,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:46:59,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:46:59,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 81 conjunts are in the unsatisfiable core [2023-08-24 08:46:59,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:46:59,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:46:59,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:46:59,460 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:46:59,461 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 08:46:59,557 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:59,558 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 08:46:59,584 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 08:46:59,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:46:59,723 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_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 08:46:59,757 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:59,758 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 08:46:59,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:46:59,780 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 08:47:00,064 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:00,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:00,108 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:47:00,109 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 08:47:00,422 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 08:47:00,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341631541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:00,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:00,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 33 [2023-08-24 08:47:00,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798130147] [2023-08-24 08:47:00,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:00,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:47:00,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:00,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:47:00,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=976, Unknown=4, NotChecked=64, Total=1190 [2023-08-24 08:47:00,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 08:47:00,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 571 transitions, 9251 flow. Second operand has 35 states, 35 states have (on average 205.0) internal successors, (7175), 35 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:00,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:00,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 08:47:00,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:02,795 INFO L124 PetriNetUnfolderBase]: 5537/8095 cut-off events. [2023-08-24 08:47:02,795 INFO L125 PetriNetUnfolderBase]: For 188842/188842 co-relation queries the response was YES. [2023-08-24 08:47:02,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57881 conditions, 8095 events. 5537/8095 cut-off events. For 188842/188842 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 43510 event pairs, 1706 based on Foata normal form. 1/8096 useless extension candidates. Maximal degree in co-relation 57699. Up to 7471 conditions per place. [2023-08-24 08:47:02,881 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 499 selfloop transitions, 125 changer transitions 1/625 dead transitions. [2023-08-24 08:47:02,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 625 transitions, 11459 flow [2023-08-24 08:47:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:47:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:47:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2333 transitions. [2023-08-24 08:47:02,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051667756703728 [2023-08-24 08:47:02,884 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2333 transitions. [2023-08-24 08:47:02,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2333 transitions. [2023-08-24 08:47:02,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:02,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2333 transitions. [2023-08-24 08:47:02,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.0909090909091) internal successors, (2333), 11 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:02,888 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 08:47:02,888 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 08:47:02,888 INFO L175 Difference]: Start difference. First operand has 332 places, 571 transitions, 9251 flow. Second operand 11 states and 2333 transitions. [2023-08-24 08:47:02,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 625 transitions, 11459 flow [2023-08-24 08:47:03,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 625 transitions, 11050 flow, removed 107 selfloop flow, removed 9 redundant places. [2023-08-24 08:47:03,491 INFO L231 Difference]: Finished difference. Result has 336 places, 584 transitions, 9827 flow [2023-08-24 08:47:03,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=8842, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9827, PETRI_PLACES=336, PETRI_TRANSITIONS=584} [2023-08-24 08:47:03,491 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 304 predicate places. [2023-08-24 08:47:03,491 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 584 transitions, 9827 flow [2023-08-24 08:47:03,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 205.0) internal successors, (7175), 35 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:03,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:03,492 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 08:47:03,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:03,692 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 08:47:03,693 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 08:47:03,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 527477929, now seen corresponding path program 40 times [2023-08-24 08:47:03,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028413923] [2023-08-24 08:47:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:03,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:04,278 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 08:47:04,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028413923] [2023-08-24 08:47:04,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028413923] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:04,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944429167] [2023-08-24 08:47:04,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:47:04,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:04,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:04,279 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 08:47:04,280 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 08:47:04,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:47:04,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:04,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-24 08:47:04,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:04,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:04,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:04,798 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:47:04,798 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 08:47:04,876 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:04,876 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 08:47:04,899 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 08:47:04,899 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:04,976 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_2986 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2986))) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select (select .cse0 c_~B~0.base) c_~B~0.offset) c_~csum~0)) .cse1)) (forall ((v_ArrVal_2986 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2986))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0)))))) is different from false [2023-08-24 08:47:04,987 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_2986 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2986))) (+ (select (select .cse1 c_~A~0.base) c_~A~0.offset) (select (select .cse1 c_~B~0.base) c_~B~0.offset) c_~csum~0)))) (forall ((v_ArrVal_2986 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2986))) (+ (select (select .cse2 c_~A~0.base) c_~A~0.offset) (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0)) .cse0)))) is different from false [2023-08-24 08:47:05,033 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:05,034 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 08:47:05,043 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:05,043 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 08:47:05,329 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:05,329 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:05,370 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:47:05,370 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 08:47:05,651 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 08:47:05,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944429167] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:05,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:05,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 08:47:05,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051204898] [2023-08-24 08:47:05,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:05,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:47:05,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:05,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:47:05,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=645, Unknown=2, NotChecked=106, Total=870 [2023-08-24 08:47:05,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 695 [2023-08-24 08:47:05,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 584 transitions, 9827 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 08:47:05,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:05,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 695 [2023-08-24 08:47:05,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:08,019 INFO L124 PetriNetUnfolderBase]: 5737/8389 cut-off events. [2023-08-24 08:47:08,020 INFO L125 PetriNetUnfolderBase]: For 222964/222964 co-relation queries the response was YES. [2023-08-24 08:47:08,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61689 conditions, 8389 events. 5737/8389 cut-off events. For 222964/222964 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 45578 event pairs, 1790 based on Foata normal form. 1/8390 useless extension candidates. Maximal degree in co-relation 61505. Up to 7715 conditions per place. [2023-08-24 08:47:08,131 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 513 selfloop transitions, 133 changer transitions 1/647 dead transitions. [2023-08-24 08:47:08,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 647 transitions, 12151 flow [2023-08-24 08:47:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:47:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:47:08,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2018 transitions. [2023-08-24 08:47:08,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3226219024780176 [2023-08-24 08:47:08,133 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2018 transitions. [2023-08-24 08:47:08,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2018 transitions. [2023-08-24 08:47:08,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:08,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2018 transitions. [2023-08-24 08:47:08,134 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 08:47:08,137 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 08:47:08,137 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 08:47:08,137 INFO L175 Difference]: Start difference. First operand has 336 places, 584 transitions, 9827 flow. Second operand 9 states and 2018 transitions. [2023-08-24 08:47:08,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 647 transitions, 12151 flow [2023-08-24 08:47:09,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 647 transitions, 11440 flow, removed 308 selfloop flow, removed 5 redundant places. [2023-08-24 08:47:09,480 INFO L231 Difference]: Finished difference. Result has 342 places, 602 transitions, 10196 flow [2023-08-24 08:47:09,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=9134, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10196, PETRI_PLACES=342, PETRI_TRANSITIONS=602} [2023-08-24 08:47:09,481 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 310 predicate places. [2023-08-24 08:47:09,481 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 602 transitions, 10196 flow [2023-08-24 08:47:09,481 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 08:47:09,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:09,482 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 08:47:09,487 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 08:47:09,686 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 08:47:09,687 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 08:47:09,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:09,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1507017777, now seen corresponding path program 41 times [2023-08-24 08:47:09,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:09,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070134702] [2023-08-24 08:47:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:09,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:10,709 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 08:47:10,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:10,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070134702] [2023-08-24 08:47:10,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070134702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:10,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828753480] [2023-08-24 08:47:10,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:47:10,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:10,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:10,711 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 08:47:10,711 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 08:47:10,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:47:10,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:10,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 97 conjunts are in the unsatisfiable core [2023-08-24 08:47:10,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:10,949 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:47:10,949 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 08:47:11,004 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:47:11,004 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 08:47:11,055 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:47:11,055 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 08:47:11,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:11,416 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 08:47:11,523 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:47:11,523 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 08:47:11,665 INFO L322 Elim1Store]: treesize reduction 24, result has 77.6 percent of original size [2023-08-24 08:47:11,666 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 116 [2023-08-24 08:47:11,770 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 08:47:11,770 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:12,105 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:12,106 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 1654 treesize of output 1472 [2023-08-24 08:47:12,147 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:12,147 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 08:47:14,794 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:18,782 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 08:47:18,790 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:18,791 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 08:47:18,801 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 08:47:18,825 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:18,825 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 08:47:18,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:18,882 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 08:47:19,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:19,080 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 08:47:19,096 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:47:19,097 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 08:47:19,105 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:19,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:19,113 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 08:47:19,132 INFO L322 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-24 08:47:19,132 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 08:47:19,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:19,154 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 08:47:19,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2023-08-24 08:47:19,419 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:19,419 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 27 [2023-08-24 08:47:19,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:19,425 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 18 treesize of output 10 [2023-08-24 08:47:19,429 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:19,442 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:19,442 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 08:47:19,477 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 08:47:19,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:19,493 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 08:47:19,600 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 08:47:19,606 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:19,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:19,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:19,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:19,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:19,623 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 26 treesize of output 37 [2023-08-24 08:47:19,638 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 08:47:19,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:19,647 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 08:47:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:19,733 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:19,779 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:47:19,779 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 08:47:19,791 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:19,792 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 08:47:20,323 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 08:47:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828753480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:20,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:20,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 36 [2023-08-24 08:47:20,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194906251] [2023-08-24 08:47:20,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 08:47:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 08:47:20,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1244, Unknown=1, NotChecked=0, Total=1406 [2023-08-24 08:47:20,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 695 [2023-08-24 08:47:20,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 602 transitions, 10196 flow. Second operand has 38 states, 38 states have (on average 197.8421052631579) internal successors, (7518), 38 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:20,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:20,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 695 [2023-08-24 08:47:20,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:23,946 INFO L124 PetriNetUnfolderBase]: 5913/8638 cut-off events. [2023-08-24 08:47:23,946 INFO L125 PetriNetUnfolderBase]: For 228490/228490 co-relation queries the response was YES. [2023-08-24 08:47:24,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64006 conditions, 8638 events. 5913/8638 cut-off events. For 228490/228490 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 46897 event pairs, 1934 based on Foata normal form. 1/8639 useless extension candidates. Maximal degree in co-relation 63820. Up to 8121 conditions per place. [2023-08-24 08:47:24,059 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 533 selfloop transitions, 143 changer transitions 1/677 dead transitions. [2023-08-24 08:47:24,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 677 transitions, 13216 flow [2023-08-24 08:47:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:47:24,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:47:24,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3647 transitions. [2023-08-24 08:47:24,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29152677857713827 [2023-08-24 08:47:24,062 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3647 transitions. [2023-08-24 08:47:24,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3647 transitions. [2023-08-24 08:47:24,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:24,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3647 transitions. [2023-08-24 08:47:24,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 202.61111111111111) internal successors, (3647), 18 states have internal predecessors, (3647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:24,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 695.0) internal successors, (13205), 19 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:24,069 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 695.0) internal successors, (13205), 19 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:24,069 INFO L175 Difference]: Start difference. First operand has 342 places, 602 transitions, 10196 flow. Second operand 18 states and 3647 transitions. [2023-08-24 08:47:24,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 677 transitions, 13216 flow [2023-08-24 08:47:25,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 677 transitions, 12577 flow, removed 274 selfloop flow, removed 3 redundant places. [2023-08-24 08:47:25,121 INFO L231 Difference]: Finished difference. Result has 360 places, 632 transitions, 11250 flow [2023-08-24 08:47:25,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=9589, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11250, PETRI_PLACES=360, PETRI_TRANSITIONS=632} [2023-08-24 08:47:25,121 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 328 predicate places. [2023-08-24 08:47:25,121 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 632 transitions, 11250 flow [2023-08-24 08:47:25,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 197.8421052631579) internal successors, (7518), 38 states have internal predecessors, (7518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:25,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:25,122 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 08:47:25,127 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 08:47:25,323 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 08:47:25,323 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 08:47:25,323 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:25,323 INFO L85 PathProgramCache]: Analyzing trace with hash -265533851, now seen corresponding path program 42 times [2023-08-24 08:47:25,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:25,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886808329] [2023-08-24 08:47:25,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:25,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:25,816 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 08:47:25,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886808329] [2023-08-24 08:47:25,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886808329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:25,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594242549] [2023-08-24 08:47:25,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:47:25,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:25,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:25,818 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 08:47:25,820 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 08:47:26,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:47:26,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:26,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 08:47:26,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:26,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:26,246 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 08:47:26,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:26,368 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 08:47:26,380 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 08:47:26,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:26,505 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_3125 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3125))) (let ((.cse0 (select .cse2 ~B~0.base))) (<= (+ (select .cse0 .cse1) c_~asum~0 c_~bsum~0) (+ (select .cse0 c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0))))) (forall ((v_ArrVal_3125 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3125))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ (select .cse3 c_~B~0.offset) (select (select .cse4 c_~A~0.base) c_~A~0.offset) c_~csum~0) (+ (select .cse3 .cse1) c_~asum~0 c_~bsum~0))))))) is different from false [2023-08-24 08:47:26,541 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:26,541 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 08:47:26,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:26,559 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 08:47:26,821 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:26,931 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 08:47:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594242549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:26,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:26,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-24 08:47:26,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770807137] [2023-08-24 08:47:26,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:26,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:47:26,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:47:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=543, Unknown=1, NotChecked=48, Total=702 [2023-08-24 08:47:26,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 08:47:26,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 632 transitions, 11250 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 08:47:26,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:26,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 08:47:26,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:29,228 INFO L124 PetriNetUnfolderBase]: 5973/8727 cut-off events. [2023-08-24 08:47:29,228 INFO L125 PetriNetUnfolderBase]: For 213023/213023 co-relation queries the response was YES. [2023-08-24 08:47:29,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65156 conditions, 8727 events. 5973/8727 cut-off events. For 213023/213023 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 47543 event pairs, 1965 based on Foata normal form. 1/8728 useless extension candidates. Maximal degree in co-relation 64961. Up to 8281 conditions per place. [2023-08-24 08:47:29,350 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 558 selfloop transitions, 119 changer transitions 1/678 dead transitions. [2023-08-24 08:47:29,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 678 transitions, 13153 flow [2023-08-24 08:47:29,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:47:29,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:47:29,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2435 transitions. [2023-08-24 08:47:29,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35035971223021584 [2023-08-24 08:47:29,352 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2435 transitions. [2023-08-24 08:47:29,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2435 transitions. [2023-08-24 08:47:29,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:29,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2435 transitions. [2023-08-24 08:47:29,354 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 08:47:29,356 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 08:47:29,357 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 08:47:29,357 INFO L175 Difference]: Start difference. First operand has 360 places, 632 transitions, 11250 flow. Second operand 10 states and 2435 transitions. [2023-08-24 08:47:29,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 678 transitions, 13153 flow [2023-08-24 08:47:30,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 678 transitions, 11838 flow, removed 581 selfloop flow, removed 9 redundant places. [2023-08-24 08:47:30,283 INFO L231 Difference]: Finished difference. Result has 363 places, 638 transitions, 10490 flow [2023-08-24 08:47:30,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=9939, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10490, PETRI_PLACES=363, PETRI_TRANSITIONS=638} [2023-08-24 08:47:30,283 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 331 predicate places. [2023-08-24 08:47:30,283 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 638 transitions, 10490 flow [2023-08-24 08:47:30,284 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 08:47:30,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:30,284 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 08:47:30,289 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 08:47:30,484 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 08:47:30,485 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 08:47:30,485 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1346071697, now seen corresponding path program 43 times [2023-08-24 08:47:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:30,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293353448] [2023-08-24 08:47:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:30,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:30,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:31,099 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 08:47:31,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:31,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293353448] [2023-08-24 08:47:31,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293353448] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:31,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93336254] [2023-08-24 08:47:31,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:47:31,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:31,101 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 08:47:31,101 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 08:47:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:31,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 90 conjunts are in the unsatisfiable core [2023-08-24 08:47:31,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:31,335 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 08:47:31,378 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:47:31,378 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 08:47:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:31,581 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 08:47:31,671 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:47:31,671 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 08:47:31,856 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:31,856 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 08:47:31,905 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 08:47:31,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:33,021 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:33,022 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 2050 treesize of output 1796 [2023-08-24 08:47:33,048 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:33,049 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 08:47:38,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,148 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 08:47:38,198 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,198 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 08:47:38,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,399 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 08:47:38,635 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 08:47:38,648 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 08:47:38,657 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,657 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 08:47:38,693 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,693 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 08:47:38,706 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 08:47:38,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:38,723 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,723 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 75 [2023-08-24 08:47:38,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:38,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:38,784 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,785 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 881 treesize of output 529 [2023-08-24 08:47:38,831 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 8 treesize of output 6 [2023-08-24 08:47:38,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:38,848 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:38,848 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 25 [2023-08-24 08:47:38,886 INFO L322 Elim1Store]: treesize reduction 12, result has 77.4 percent of original size [2023-08-24 08:47:38,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 51 [2023-08-24 08:47:39,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:39,019 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 08:47:39,031 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,036 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,040 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,046 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,074 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:47:39,074 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 08:47:39,117 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,123 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,134 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,150 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,210 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,215 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,221 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,227 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,236 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,241 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:39,254 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 08:47:39,297 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,306 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,313 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,328 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:47:39,424 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:39,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:39,475 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:47:39,475 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 08:47:39,491 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:39,491 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 08:47:39,869 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:39,869 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 08:47:39,927 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 08:47:39,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93336254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:39,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:39,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 08:47:39,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322173841] [2023-08-24 08:47:39,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:39,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:47:39,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:39,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:47:39,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=902, Unknown=18, NotChecked=0, Total=1056 [2023-08-24 08:47:39,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 695 [2023-08-24 08:47:39,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 638 transitions, 10490 flow. Second operand has 33 states, 33 states have (on average 224.24242424242425) internal successors, (7400), 33 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:39,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:39,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 695 [2023-08-24 08:47:39,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:42,384 INFO L124 PetriNetUnfolderBase]: 6061/8856 cut-off events. [2023-08-24 08:47:42,384 INFO L125 PetriNetUnfolderBase]: For 186064/186064 co-relation queries the response was YES. [2023-08-24 08:47:42,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64206 conditions, 8856 events. 6061/8856 cut-off events. For 186064/186064 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 48324 event pairs, 2019 based on Foata normal form. 1/8857 useless extension candidates. Maximal degree in co-relation 64011. Up to 8418 conditions per place. [2023-08-24 08:47:42,505 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 558 selfloop transitions, 123 changer transitions 1/682 dead transitions. [2023-08-24 08:47:42,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 682 transitions, 12403 flow [2023-08-24 08:47:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:47:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:47:42,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2757 transitions. [2023-08-24 08:47:42,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33057553956834534 [2023-08-24 08:47:42,507 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2757 transitions. [2023-08-24 08:47:42,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2757 transitions. [2023-08-24 08:47:42,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:42,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2757 transitions. [2023-08-24 08:47:42,509 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 08:47:42,512 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 08:47:42,513 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 08:47:42,513 INFO L175 Difference]: Start difference. First operand has 363 places, 638 transitions, 10490 flow. Second operand 12 states and 2757 transitions. [2023-08-24 08:47:42,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 682 transitions, 12403 flow [2023-08-24 08:47:43,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 682 transitions, 11973 flow, removed 107 selfloop flow, removed 6 redundant places. [2023-08-24 08:47:43,161 INFO L231 Difference]: Finished difference. Result has 370 places, 644 transitions, 10607 flow [2023-08-24 08:47:43,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10066, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10607, PETRI_PLACES=370, PETRI_TRANSITIONS=644} [2023-08-24 08:47:43,162 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 338 predicate places. [2023-08-24 08:47:43,162 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 644 transitions, 10607 flow [2023-08-24 08:47:43,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 224.24242424242425) internal successors, (7400), 33 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:43,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:43,163 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 08:47:43,168 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 08:47:43,363 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 08:47:43,363 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 08:47:43,363 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:43,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1158186263, now seen corresponding path program 44 times [2023-08-24 08:47:43,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:43,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466858359] [2023-08-24 08:47:43,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:43,854 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 08:47:43,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466858359] [2023-08-24 08:47:43,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466858359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:43,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044870189] [2023-08-24 08:47:43,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:47:43,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:43,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:43,855 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 08:47:43,856 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 08:47:44,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:47:44,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:44,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 08:47:44,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:44,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:47:44,290 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 08:47:44,406 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:44,407 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 08:47:44,419 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 08:47:44,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:44,544 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_3260 (Array Int Int)) (~A~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3260))) (let ((.cse0 (select .cse2 ~A~0.base))) (<= (+ (select .cse0 .cse1) c_~asum~0 c_~bsum~0) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select .cse0 c_~A~0.offset)))))) (forall ((v_ArrVal_3260 (Array Int Int)) (~A~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_3260))) (let ((.cse4 (select .cse3 ~A~0.base))) (<= (+ (select (select .cse3 c_~B~0.base) c_~B~0.offset) c_~csum~0 (select .cse4 c_~A~0.offset)) (+ (select .cse4 .cse1) c_~asum~0 c_~bsum~0))))))) is different from false [2023-08-24 08:47:44,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:44,584 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 08:47:44,603 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:44,603 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 08:47:44,850 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:44,981 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 08:47:44,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044870189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:44,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:44,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-24 08:47:44,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515073287] [2023-08-24 08:47:44,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:44,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:47:44,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:47:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=546, Unknown=1, NotChecked=48, Total=702 [2023-08-24 08:47:44,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 08:47:44,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 644 transitions, 10607 flow. Second operand has 27 states, 27 states have (on average 230.55555555555554) internal successors, (6225), 27 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:44,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:44,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 08:47:44,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:47,132 INFO L124 PetriNetUnfolderBase]: 6121/8945 cut-off events. [2023-08-24 08:47:47,132 INFO L125 PetriNetUnfolderBase]: For 187089/187089 co-relation queries the response was YES. [2023-08-24 08:47:47,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64812 conditions, 8945 events. 6121/8945 cut-off events. For 187089/187089 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48818 event pairs, 2076 based on Foata normal form. 1/8946 useless extension candidates. Maximal degree in co-relation 64613. Up to 8539 conditions per place. [2023-08-24 08:47:47,258 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 572 selfloop transitions, 110 changer transitions 1/683 dead transitions. [2023-08-24 08:47:47,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 683 transitions, 12454 flow [2023-08-24 08:47:47,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:47:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:47:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2143 transitions. [2023-08-24 08:47:47,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426059152677858 [2023-08-24 08:47:47,260 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2143 transitions. [2023-08-24 08:47:47,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2143 transitions. [2023-08-24 08:47:47,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:47,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2143 transitions. [2023-08-24 08:47:47,262 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 08:47:47,264 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 08:47:47,264 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 08:47:47,264 INFO L175 Difference]: Start difference. First operand has 370 places, 644 transitions, 10607 flow. Second operand 9 states and 2143 transitions. [2023-08-24 08:47:47,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 683 transitions, 12454 flow [2023-08-24 08:47:47,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 683 transitions, 11998 flow, removed 114 selfloop flow, removed 9 redundant places. [2023-08-24 08:47:47,848 INFO L231 Difference]: Finished difference. Result has 371 places, 649 transitions, 10645 flow [2023-08-24 08:47:47,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10157, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=644, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10645, PETRI_PLACES=371, PETRI_TRANSITIONS=649} [2023-08-24 08:47:47,849 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 339 predicate places. [2023-08-24 08:47:47,849 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 649 transitions, 10645 flow [2023-08-24 08:47:47,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 230.55555555555554) internal successors, (6225), 27 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:47,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:47,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:47:47,857 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 08:47:48,050 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 08:47:48,050 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 08:47:48,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:48,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1638054277, now seen corresponding path program 45 times [2023-08-24 08:47:48,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:48,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794033243] [2023-08-24 08:47:48,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:48,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:48,858 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 08:47:48,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794033243] [2023-08-24 08:47:48,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794033243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:48,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135928070] [2023-08-24 08:47:48,859 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:47:48,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:48,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:48,860 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 08:47:48,860 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 08:47:49,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:47:49,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:49,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:47:49,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:49,338 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:49,338 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 08:47:49,354 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 08:47:49,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:49,483 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:49,483 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 08:47:49,539 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 08:47:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135928070] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:49,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:49,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 6] total 25 [2023-08-24 08:47:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146308809] [2023-08-24 08:47:49,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:49,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:47:49,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:49,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:47:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-08-24 08:47:49,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 695 [2023-08-24 08:47:49,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 649 transitions, 10645 flow. Second operand has 27 states, 27 states have (on average 206.40740740740742) internal successors, (5573), 27 states have internal predecessors, (5573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:49,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:49,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 695 [2023-08-24 08:47:49,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:51,993 INFO L124 PetriNetUnfolderBase]: 6371/9310 cut-off events. [2023-08-24 08:47:51,993 INFO L125 PetriNetUnfolderBase]: For 222740/222740 co-relation queries the response was YES. [2023-08-24 08:47:52,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69051 conditions, 9310 events. 6371/9310 cut-off events. For 222740/222740 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 51061 event pairs, 1926 based on Foata normal form. 1/9311 useless extension candidates. Maximal degree in co-relation 68853. Up to 8844 conditions per place. [2023-08-24 08:47:52,100 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 603 selfloop transitions, 105 changer transitions 1/709 dead transitions. [2023-08-24 08:47:52,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 709 transitions, 13234 flow [2023-08-24 08:47:52,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:47:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:47:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2344 transitions. [2023-08-24 08:47:52,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3066056245912361 [2023-08-24 08:47:52,104 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2344 transitions. [2023-08-24 08:47:52,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2344 transitions. [2023-08-24 08:47:52,104 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:52,104 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2344 transitions. [2023-08-24 08:47:52,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 213.0909090909091) internal successors, (2344), 11 states have internal predecessors, (2344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,108 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 08:47:52,108 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 08:47:52,108 INFO L175 Difference]: Start difference. First operand has 371 places, 649 transitions, 10645 flow. Second operand 11 states and 2344 transitions. [2023-08-24 08:47:52,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 709 transitions, 13234 flow [2023-08-24 08:47:52,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 709 transitions, 12806 flow, removed 112 selfloop flow, removed 6 redundant places. [2023-08-24 08:47:52,768 INFO L231 Difference]: Finished difference. Result has 379 places, 669 transitions, 11358 flow [2023-08-24 08:47:52,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10235, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11358, PETRI_PLACES=379, PETRI_TRANSITIONS=669} [2023-08-24 08:47:52,768 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 347 predicate places. [2023-08-24 08:47:52,769 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 669 transitions, 11358 flow [2023-08-24 08:47:52,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 206.40740740740742) internal successors, (5573), 27 states have internal predecessors, (5573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:52,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:52,769 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 08:47:52,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-24 08:47:52,974 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 08:47:52,975 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 08:47:52,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:52,975 INFO L85 PathProgramCache]: Analyzing trace with hash -610177817, now seen corresponding path program 46 times [2023-08-24 08:47:52,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:52,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026971574] [2023-08-24 08:47:52,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:52,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:53,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:53,482 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 08:47:53,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:53,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026971574] [2023-08-24 08:47:53,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026971574] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:53,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562126670] [2023-08-24 08:47:53,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:47:53,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:53,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:53,484 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 08:47:53,484 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 08:47:53,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:47:53,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:53,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:47:53,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:53,711 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 08:47:53,753 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:47:53,753 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 08:47:53,965 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:47:53,966 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 08:47:54,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:54,095 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 08:47:54,133 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 08:47:54,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:54,319 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:54,319 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 08:47:54,414 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:47:54,570 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 08:47:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562126670] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:54,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:54,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-24 08:47:54,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313396804] [2023-08-24 08:47:54,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:47:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:47:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:47:54,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:47:54,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 669 transitions, 11358 flow. Second operand has 24 states, 24 states have (on average 211.58333333333334) internal successors, (5078), 24 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:54,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:54,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:47:54,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:47:57,263 INFO L124 PetriNetUnfolderBase]: 6431/9399 cut-off events. [2023-08-24 08:47:57,263 INFO L125 PetriNetUnfolderBase]: For 223534/223534 co-relation queries the response was YES. [2023-08-24 08:47:57,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69932 conditions, 9399 events. 6431/9399 cut-off events. For 223534/223534 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 51558 event pairs, 2235 based on Foata normal form. 1/9400 useless extension candidates. Maximal degree in co-relation 69728. Up to 9084 conditions per place. [2023-08-24 08:47:57,391 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 604 selfloop transitions, 106 changer transitions 1/711 dead transitions. [2023-08-24 08:47:57,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 711 transitions, 13353 flow [2023-08-24 08:47:57,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:47:57,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:47:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2390 transitions. [2023-08-24 08:47:57,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31262262916939176 [2023-08-24 08:47:57,393 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2390 transitions. [2023-08-24 08:47:57,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2390 transitions. [2023-08-24 08:47:57,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:47:57,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2390 transitions. [2023-08-24 08:47:57,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 217.27272727272728) internal successors, (2390), 11 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:57,397 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 08:47:57,397 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 08:47:57,397 INFO L175 Difference]: Start difference. First operand has 379 places, 669 transitions, 11358 flow. Second operand 11 states and 2390 transitions. [2023-08-24 08:47:57,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 711 transitions, 13353 flow [2023-08-24 08:47:58,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 711 transitions, 12580 flow, removed 356 selfloop flow, removed 3 redundant places. [2023-08-24 08:47:58,171 INFO L231 Difference]: Finished difference. Result has 389 places, 675 transitions, 11123 flow [2023-08-24 08:47:58,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10585, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11123, PETRI_PLACES=389, PETRI_TRANSITIONS=675} [2023-08-24 08:47:58,172 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 357 predicate places. [2023-08-24 08:47:58,172 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 675 transitions, 11123 flow [2023-08-24 08:47:58,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 211.58333333333334) internal successors, (5078), 24 states have internal predecessors, (5078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:58,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:47:58,173 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 08:47:58,178 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 08:47:58,373 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 08:47:58,373 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 08:47:58,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:47:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1344013667, now seen corresponding path program 47 times [2023-08-24 08:47:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:47:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766344694] [2023-08-24 08:47:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:47:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:47:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:47:58,805 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 08:47:58,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:47:58,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766344694] [2023-08-24 08:47:58,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766344694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:47:58,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835250480] [2023-08-24 08:47:58,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:47:58,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:47:58,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:47:58,806 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 08:47:58,807 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 08:47:59,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:47:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:47:59,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:47:59,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:47:59,262 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:59,262 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 08:47:59,274 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 08:47:59,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:47:59,396 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:47:59,396 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 08:47:59,626 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 08:47:59,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835250480] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:47:59,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:47:59,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 17 [2023-08-24 08:47:59,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238690753] [2023-08-24 08:47:59,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:47:59,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 08:47:59,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:47:59,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 08:47:59,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2023-08-24 08:47:59,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:47:59,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 675 transitions, 11123 flow. Second operand has 19 states, 19 states have (on average 241.10526315789474) internal successors, (4581), 19 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:47:59,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:47:59,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:47:59,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:01,957 INFO L124 PetriNetUnfolderBase]: 6521/9532 cut-off events. [2023-08-24 08:48:01,957 INFO L125 PetriNetUnfolderBase]: For 200322/200322 co-relation queries the response was YES. [2023-08-24 08:48:02,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68758 conditions, 9532 events. 6521/9532 cut-off events. For 200322/200322 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 52463 event pairs, 2267 based on Foata normal form. 1/9533 useless extension candidates. Maximal degree in co-relation 68548. Up to 9213 conditions per place. [2023-08-24 08:48:02,094 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 617 selfloop transitions, 101 changer transitions 1/719 dead transitions. [2023-08-24 08:48:02,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 719 transitions, 13116 flow [2023-08-24 08:48:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:48:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:48:02,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2235 transitions. [2023-08-24 08:48:02,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35731414868105515 [2023-08-24 08:48:02,096 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2235 transitions. [2023-08-24 08:48:02,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2235 transitions. [2023-08-24 08:48:02,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:02,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2235 transitions. [2023-08-24 08:48:02,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.33333333333334) internal successors, (2235), 9 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:02,100 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 08:48:02,101 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 08:48:02,101 INFO L175 Difference]: Start difference. First operand has 389 places, 675 transitions, 11123 flow. Second operand 9 states and 2235 transitions. [2023-08-24 08:48:02,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 719 transitions, 13116 flow [2023-08-24 08:48:03,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 719 transitions, 12661 flow, removed 116 selfloop flow, removed 9 redundant places. [2023-08-24 08:48:03,117 INFO L231 Difference]: Finished difference. Result has 390 places, 681 transitions, 11152 flow [2023-08-24 08:48:03,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10668, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11152, PETRI_PLACES=390, PETRI_TRANSITIONS=681} [2023-08-24 08:48:03,118 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 358 predicate places. [2023-08-24 08:48:03,118 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 681 transitions, 11152 flow [2023-08-24 08:48:03,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 241.10526315789474) internal successors, (4581), 19 states have internal predecessors, (4581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:03,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:03,119 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 08:48:03,126 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 08:48:03,320 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 08:48:03,321 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 08:48:03,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:03,321 INFO L85 PathProgramCache]: Analyzing trace with hash 929225133, now seen corresponding path program 48 times [2023-08-24 08:48:03,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:03,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844870914] [2023-08-24 08:48:03,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:03,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:03,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:03,768 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 08:48:03,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:03,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844870914] [2023-08-24 08:48:03,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844870914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:03,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265356990] [2023-08-24 08:48:03,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:48:03,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:03,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:03,770 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 08:48:03,770 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 08:48:03,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:48:03,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:03,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:48:03,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:04,199 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:04,199 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 08:48:04,215 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 08:48:04,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:04,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:04,326 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 08:48:04,550 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 08:48:04,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265356990] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:04,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:04,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 16 [2023-08-24 08:48:04,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772513983] [2023-08-24 08:48:04,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:04,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 08:48:04,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:04,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 08:48:04,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 08:48:04,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:48:04,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 681 transitions, 11152 flow. Second operand has 18 states, 18 states have (on average 240.94444444444446) internal successors, (4337), 18 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:04,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:04,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:48:04,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:07,346 INFO L124 PetriNetUnfolderBase]: 6687/9777 cut-off events. [2023-08-24 08:48:07,347 INFO L125 PetriNetUnfolderBase]: For 236422/236422 co-relation queries the response was YES. [2023-08-24 08:48:07,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71783 conditions, 9777 events. 6687/9777 cut-off events. For 236422/236422 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 54062 event pairs, 2355 based on Foata normal form. 1/9778 useless extension candidates. Maximal degree in co-relation 71577. Up to 9419 conditions per place. [2023-08-24 08:48:07,476 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 642 selfloop transitions, 91 changer transitions 1/734 dead transitions. [2023-08-24 08:48:07,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 734 transitions, 13624 flow [2023-08-24 08:48:07,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:48:07,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:48:07,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2239 transitions. [2023-08-24 08:48:07,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35795363709032774 [2023-08-24 08:48:07,478 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2239 transitions. [2023-08-24 08:48:07,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2239 transitions. [2023-08-24 08:48:07,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:07,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2239 transitions. [2023-08-24 08:48:07,480 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 248.77777777777777) internal successors, (2239), 9 states have internal predecessors, (2239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:07,483 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 08:48:07,483 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 08:48:07,483 INFO L175 Difference]: Start difference. First operand has 390 places, 681 transitions, 11152 flow. Second operand 9 states and 2239 transitions. [2023-08-24 08:48:07,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 734 transitions, 13624 flow [2023-08-24 08:48:08,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 734 transitions, 13209 flow, removed 111 selfloop flow, removed 6 redundant places. [2023-08-24 08:48:08,316 INFO L231 Difference]: Finished difference. Result has 395 places, 695 transitions, 11650 flow [2023-08-24 08:48:08,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10737, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11650, PETRI_PLACES=395, PETRI_TRANSITIONS=695} [2023-08-24 08:48:08,317 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 363 predicate places. [2023-08-24 08:48:08,317 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 695 transitions, 11650 flow [2023-08-24 08:48:08,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 240.94444444444446) internal successors, (4337), 18 states have internal predecessors, (4337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:08,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:08,317 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 08:48:08,322 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 08:48:08,518 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 08:48:08,518 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:08,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:08,518 INFO L85 PathProgramCache]: Analyzing trace with hash -951926997, now seen corresponding path program 49 times [2023-08-24 08:48:08,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:08,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739869769] [2023-08-24 08:48:08,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:08,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:09,015 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 08:48:09,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739869769] [2023-08-24 08:48:09,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739869769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:09,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322246570] [2023-08-24 08:48:09,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:48:09,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:09,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:09,017 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:09,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 08:48:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:09,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:48:09,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:09,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:09,428 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 08:48:09,440 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 08:48:09,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:09,555 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:09,555 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 08:48:09,601 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 08:48:09,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322246570] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:09,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:09,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:48:09,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682864052] [2023-08-24 08:48:09,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:09,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:48:09,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:09,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:48:09,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:48:09,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:48:09,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 695 transitions, 11650 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 08:48:09,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:09,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:48:09,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:12,525 INFO L124 PetriNetUnfolderBase]: 6787/9924 cut-off events. [2023-08-24 08:48:12,525 INFO L125 PetriNetUnfolderBase]: For 248759/248759 co-relation queries the response was YES. [2023-08-24 08:48:12,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72873 conditions, 9924 events. 6787/9924 cut-off events. For 248759/248759 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 54960 event pairs, 2085 based on Foata normal form. 1/9925 useless extension candidates. Maximal degree in co-relation 72664. Up to 9528 conditions per place. [2023-08-24 08:48:12,644 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 632 selfloop transitions, 105 changer transitions 1/738 dead transitions. [2023-08-24 08:48:12,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 738 transitions, 13719 flow [2023-08-24 08:48:12,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:48:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:48:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2233 transitions. [2023-08-24 08:48:12,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569944044764189 [2023-08-24 08:48:12,646 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2233 transitions. [2023-08-24 08:48:12,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2233 transitions. [2023-08-24 08:48:12,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:12,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2233 transitions. [2023-08-24 08:48:12,647 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 08:48:12,650 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 08:48:12,650 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 08:48:12,650 INFO L175 Difference]: Start difference. First operand has 395 places, 695 transitions, 11650 flow. Second operand 9 states and 2233 transitions. [2023-08-24 08:48:12,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 738 transitions, 13719 flow [2023-08-24 08:48:13,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 738 transitions, 13030 flow, removed 302 selfloop flow, removed 3 redundant places. [2023-08-24 08:48:13,678 INFO L231 Difference]: Finished difference. Result has 403 places, 705 transitions, 11524 flow [2023-08-24 08:48:13,679 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=10961, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=695, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11524, PETRI_PLACES=403, PETRI_TRANSITIONS=705} [2023-08-24 08:48:13,679 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 371 predicate places. [2023-08-24 08:48:13,679 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 705 transitions, 11524 flow [2023-08-24 08:48:13,679 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 08:48:13,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:13,680 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 08:48:13,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-08-24 08:48:13,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-24 08:48:13,880 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:13,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:13,880 INFO L85 PathProgramCache]: Analyzing trace with hash 735932641, now seen corresponding path program 50 times [2023-08-24 08:48:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:13,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719523798] [2023-08-24 08:48:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:13,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:13,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:14,312 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 08:48:14,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:14,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719523798] [2023-08-24 08:48:14,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719523798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:14,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038189087] [2023-08-24 08:48:14,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:48:14,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:14,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:14,313 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:14,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-24 08:48:14,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:14,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:48:14,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:14,752 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:14,752 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 08:48:14,763 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 08:48:14,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:14,880 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:14,880 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 08:48:14,925 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 08:48:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038189087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:14,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:48:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000951088] [2023-08-24 08:48:14,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:14,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:48:14,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:14,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:48:14,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:48:14,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:48:14,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 705 transitions, 11524 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 08:48:14,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:14,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:48:14,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:17,786 INFO L124 PetriNetUnfolderBase]: 6907/10099 cut-off events. [2023-08-24 08:48:17,786 INFO L125 PetriNetUnfolderBase]: For 229536/229536 co-relation queries the response was YES. [2023-08-24 08:48:17,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72602 conditions, 10099 events. 6907/10099 cut-off events. For 229536/229536 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 56094 event pairs, 2092 based on Foata normal form. 1/10100 useless extension candidates. Maximal degree in co-relation 72389. Up to 9687 conditions per place. [2023-08-24 08:48:17,912 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 636 selfloop transitions, 115 changer transitions 1/752 dead transitions. [2023-08-24 08:48:17,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 752 transitions, 13675 flow [2023-08-24 08:48:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:48:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:48:17,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2231 transitions. [2023-08-24 08:48:17,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3566746602717826 [2023-08-24 08:48:17,914 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2231 transitions. [2023-08-24 08:48:17,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2231 transitions. [2023-08-24 08:48:17,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:17,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2231 transitions. [2023-08-24 08:48:17,915 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 08:48:17,917 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 08:48:17,918 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 08:48:17,918 INFO L175 Difference]: Start difference. First operand has 403 places, 705 transitions, 11524 flow. Second operand 9 states and 2231 transitions. [2023-08-24 08:48:17,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 752 transitions, 13675 flow [2023-08-24 08:48:18,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 752 transitions, 13193 flow, removed 132 selfloop flow, removed 5 redundant places. [2023-08-24 08:48:18,667 INFO L231 Difference]: Finished difference. Result has 410 places, 721 transitions, 11779 flow [2023-08-24 08:48:18,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11060, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=705, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11779, PETRI_PLACES=410, PETRI_TRANSITIONS=721} [2023-08-24 08:48:18,668 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 378 predicate places. [2023-08-24 08:48:18,668 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 721 transitions, 11779 flow [2023-08-24 08:48:18,668 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 08:48:18,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:18,668 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 08:48:18,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:18,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-24 08:48:18,869 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:18,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:18,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1068185683, now seen corresponding path program 51 times [2023-08-24 08:48:18,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:18,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381116997] [2023-08-24 08:48:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:18,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:19,498 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 08:48:19,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:19,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381116997] [2023-08-24 08:48:19,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381116997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:19,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414221026] [2023-08-24 08:48:19,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:48:19,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:19,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:19,500 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:19,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-24 08:48:19,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:48:19,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:19,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:48:19,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:19,776 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:48:19,776 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 08:48:19,808 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:48:19,808 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 08:48:19,847 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:48:19,848 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 08:48:20,016 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:48:20,016 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 08:48:20,112 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:20,112 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 08:48:20,278 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 08:48:20,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:20,596 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:20,596 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 08:48:20,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:48:20,942 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 08:48:20,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414221026] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:20,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:20,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-08-24 08:48:20,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592908527] [2023-08-24 08:48:20,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:20,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:48:20,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:20,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:48:20,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:48:20,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:48:20,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 721 transitions, 11779 flow. Second operand has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:20,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:20,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:48:20,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:23,965 INFO L124 PetriNetUnfolderBase]: 6987/10216 cut-off events. [2023-08-24 08:48:23,965 INFO L125 PetriNetUnfolderBase]: For 245260/245260 co-relation queries the response was YES. [2023-08-24 08:48:24,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73937 conditions, 10216 events. 6987/10216 cut-off events. For 245260/245260 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 56982 event pairs, 2463 based on Foata normal form. 1/10217 useless extension candidates. Maximal degree in co-relation 73720. Up to 9942 conditions per place. [2023-08-24 08:48:24,102 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 662 selfloop transitions, 93 changer transitions 1/756 dead transitions. [2023-08-24 08:48:24,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 756 transitions, 14009 flow [2023-08-24 08:48:24,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:48:24,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:48:24,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2384 transitions. [2023-08-24 08:48:24,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3118378024852845 [2023-08-24 08:48:24,105 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2384 transitions. [2023-08-24 08:48:24,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2384 transitions. [2023-08-24 08:48:24,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:24,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2384 transitions. [2023-08-24 08:48:24,107 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 08:48:24,110 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 08:48:24,110 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 08:48:24,110 INFO L175 Difference]: Start difference. First operand has 410 places, 721 transitions, 11779 flow. Second operand 11 states and 2384 transitions. [2023-08-24 08:48:24,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 756 transitions, 14009 flow [2023-08-24 08:48:24,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 756 transitions, 13540 flow, removed 156 selfloop flow, removed 3 redundant places. [2023-08-24 08:48:24,870 INFO L231 Difference]: Finished difference. Result has 420 places, 728 transitions, 12017 flow [2023-08-24 08:48:24,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11336, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=721, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=630, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12017, PETRI_PLACES=420, PETRI_TRANSITIONS=728} [2023-08-24 08:48:24,871 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 388 predicate places. [2023-08-24 08:48:24,871 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 728 transitions, 12017 flow [2023-08-24 08:48:24,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:24,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:24,871 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 08:48:24,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-08-24 08:48:25,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:25,076 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:25,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:25,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1713277043, now seen corresponding path program 52 times [2023-08-24 08:48:25,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:25,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871600440] [2023-08-24 08:48:25,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:25,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:25,662 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 08:48:25,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871600440] [2023-08-24 08:48:25,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871600440] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:25,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131328676] [2023-08-24 08:48:25,663 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:48:25,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:25,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:25,664 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:25,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-24 08:48:25,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:48:25,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:25,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:48:25,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:25,920 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:48:25,920 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 08:48:25,952 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:48:25,953 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 08:48:25,993 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:48:25,993 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 08:48:26,228 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:48:26,228 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 08:48:26,321 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:26,321 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 08:48:26,544 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 08:48:26,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:27,721 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:27,721 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 08:48:27,734 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:48:27,953 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 08:48:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131328676] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:27,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-08-24 08:48:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707255274] [2023-08-24 08:48:27,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:27,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:48:27,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:48:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:48:27,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:48:27,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 728 transitions, 12017 flow. Second operand has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:27,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:27,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:48:27,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:31,092 INFO L124 PetriNetUnfolderBase]: 7067/10333 cut-off events. [2023-08-24 08:48:31,093 INFO L125 PetriNetUnfolderBase]: For 255626/255626 co-relation queries the response was YES. [2023-08-24 08:48:31,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74942 conditions, 10333 events. 7067/10333 cut-off events. For 255626/255626 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 57538 event pairs, 2132 based on Foata normal form. 1/10334 useless extension candidates. Maximal degree in co-relation 74721. Up to 9935 conditions per place. [2023-08-24 08:48:31,225 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 644 selfloop transitions, 117 changer transitions 1/762 dead transitions. [2023-08-24 08:48:31,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 762 transitions, 14211 flow [2023-08-24 08:48:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:48:31,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:48:31,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2386 transitions. [2023-08-24 08:48:31,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3120994113799869 [2023-08-24 08:48:31,228 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2386 transitions. [2023-08-24 08:48:31,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2386 transitions. [2023-08-24 08:48:31,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:31,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2386 transitions. [2023-08-24 08:48:31,229 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 08:48:31,232 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 08:48:31,232 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 08:48:31,232 INFO L175 Difference]: Start difference. First operand has 420 places, 728 transitions, 12017 flow. Second operand 11 states and 2386 transitions. [2023-08-24 08:48:31,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 762 transitions, 14211 flow [2023-08-24 08:48:32,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 762 transitions, 13683 flow, removed 211 selfloop flow, removed 6 redundant places. [2023-08-24 08:48:32,269 INFO L231 Difference]: Finished difference. Result has 426 places, 734 transitions, 12199 flow [2023-08-24 08:48:32,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11489, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12199, PETRI_PLACES=426, PETRI_TRANSITIONS=734} [2023-08-24 08:48:32,270 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 394 predicate places. [2023-08-24 08:48:32,270 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 734 transitions, 12199 flow [2023-08-24 08:48:32,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:32,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:32,270 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 08:48:32,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:32,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:32,471 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:32,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:32,471 INFO L85 PathProgramCache]: Analyzing trace with hash 561577573, now seen corresponding path program 53 times [2023-08-24 08:48:32,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:32,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27489785] [2023-08-24 08:48:32,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:32,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:32,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:32,891 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 08:48:32,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27489785] [2023-08-24 08:48:32,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27489785] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:32,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451321939] [2023-08-24 08:48:32,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:48:32,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:32,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:32,892 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:32,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-24 08:48:33,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:33,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:33,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 98 conjunts are in the unsatisfiable core [2023-08-24 08:48:33,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:33,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:48:33,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:48:33,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:48:33,147 INFO L322 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2023-08-24 08:48:33,147 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 32 [2023-08-24 08:48:33,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-24 08:48:33,234 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:48:33,234 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 08:48:33,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:48:33,330 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:48:33,330 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 08:48:33,366 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:48:33,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:48:33,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:48:33,471 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 08:48:33,610 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:33,610 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 08:48:33,624 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 08:48:33,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:35,853 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 08:48:35,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451321939] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:35,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:35,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 7] total 24 [2023-08-24 08:48:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71440609] [2023-08-24 08:48:35,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:35,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:48:35,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:48:35,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:48:35,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 695 [2023-08-24 08:48:35,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 734 transitions, 12199 flow. Second operand has 26 states, 26 states have (on average 206.57692307692307) internal successors, (5371), 26 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:35,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:35,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 695 [2023-08-24 08:48:35,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:39,062 INFO L124 PetriNetUnfolderBase]: 7157/10466 cut-off events. [2023-08-24 08:48:39,062 INFO L125 PetriNetUnfolderBase]: For 261183/261183 co-relation queries the response was YES. [2023-08-24 08:48:39,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75746 conditions, 10466 events. 7157/10466 cut-off events. For 261183/261183 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 58416 event pairs, 2524 based on Foata normal form. 1/10467 useless extension candidates. Maximal degree in co-relation 75522. Up to 10178 conditions per place. [2023-08-24 08:48:39,202 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 679 selfloop transitions, 92 changer transitions 1/772 dead transitions. [2023-08-24 08:48:39,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 772 transitions, 14288 flow [2023-08-24 08:48:39,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:48:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:48:39,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2334 transitions. [2023-08-24 08:48:39,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.305297580117724 [2023-08-24 08:48:39,204 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2334 transitions. [2023-08-24 08:48:39,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2334 transitions. [2023-08-24 08:48:39,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:39,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2334 transitions. [2023-08-24 08:48:39,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 212.1818181818182) internal successors, (2334), 11 states have internal predecessors, (2334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:39,209 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 08:48:39,209 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 08:48:39,209 INFO L175 Difference]: Start difference. First operand has 426 places, 734 transitions, 12199 flow. Second operand 11 states and 2334 transitions. [2023-08-24 08:48:39,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 772 transitions, 14288 flow [2023-08-24 08:48:40,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 772 transitions, 13733 flow, removed 215 selfloop flow, removed 6 redundant places. [2023-08-24 08:48:40,106 INFO L231 Difference]: Finished difference. Result has 432 places, 740 transitions, 12143 flow [2023-08-24 08:48:40,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11644, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12143, PETRI_PLACES=432, PETRI_TRANSITIONS=740} [2023-08-24 08:48:40,107 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 400 predicate places. [2023-08-24 08:48:40,107 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 740 transitions, 12143 flow [2023-08-24 08:48:40,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 206.57692307692307) internal successors, (5371), 26 states have internal predecessors, (5371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:40,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:40,107 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 08:48:40,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:40,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-24 08:48:40,312 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:40,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:40,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1423083087, now seen corresponding path program 54 times [2023-08-24 08:48:40,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:40,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24906175] [2023-08-24 08:48:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:40,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:41,023 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 08:48:41,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:41,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24906175] [2023-08-24 08:48:41,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24906175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:41,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54496602] [2023-08-24 08:48:41,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:48:41,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:41,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:41,025 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:41,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-24 08:48:41,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:48:41,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:41,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:48:41,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:41,582 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:41,583 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 08:48:41,594 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 08:48:41,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:41,712 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:41,712 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 08:48:41,824 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:48:41,825 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 42 treesize of output 38 [2023-08-24 08:48:41,925 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 08:48:41,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54496602] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:41,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:41,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 6] total 22 [2023-08-24 08:48:41,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113324635] [2023-08-24 08:48:41,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:41,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:48:41,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:48:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:48:41,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 695 [2023-08-24 08:48:41,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 740 transitions, 12143 flow. Second operand has 24 states, 24 states have (on average 205.83333333333334) internal successors, (4940), 24 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:41,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:41,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 695 [2023-08-24 08:48:41,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:45,084 INFO L124 PetriNetUnfolderBase]: 7257/10613 cut-off events. [2023-08-24 08:48:45,084 INFO L125 PetriNetUnfolderBase]: For 263273/263273 co-relation queries the response was YES. [2023-08-24 08:48:45,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76571 conditions, 10613 events. 7257/10613 cut-off events. For 263273/263273 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 59680 event pairs, 2565 based on Foata normal form. 1/10614 useless extension candidates. Maximal degree in co-relation 76343. Up to 10357 conditions per place. [2023-08-24 08:48:45,223 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 685 selfloop transitions, 93 changer transitions 1/779 dead transitions. [2023-08-24 08:48:45,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 779 transitions, 14293 flow [2023-08-24 08:48:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:48:45,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:48:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2524 transitions. [2023-08-24 08:48:45,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026378896882494 [2023-08-24 08:48:45,225 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2524 transitions. [2023-08-24 08:48:45,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2524 transitions. [2023-08-24 08:48:45,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:45,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2524 transitions. [2023-08-24 08:48:45,227 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 08:48:45,230 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 08:48:45,231 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 08:48:45,231 INFO L175 Difference]: Start difference. First operand has 432 places, 740 transitions, 12143 flow. Second operand 12 states and 2524 transitions. [2023-08-24 08:48:45,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 779 transitions, 14293 flow [2023-08-24 08:48:46,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 779 transitions, 13859 flow, removed 126 selfloop flow, removed 8 redundant places. [2023-08-24 08:48:46,195 INFO L231 Difference]: Finished difference. Result has 438 places, 749 transitions, 12281 flow [2023-08-24 08:48:46,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11715, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=647, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12281, PETRI_PLACES=438, PETRI_TRANSITIONS=749} [2023-08-24 08:48:46,196 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 406 predicate places. [2023-08-24 08:48:46,196 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 749 transitions, 12281 flow [2023-08-24 08:48:46,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 205.83333333333334) internal successors, (4940), 24 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:46,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:46,196 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 08:48:46,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:46,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:46,397 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:46,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:46,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1280059945, now seen corresponding path program 55 times [2023-08-24 08:48:46,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:46,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101191609] [2023-08-24 08:48:46,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:46,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:47,088 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 08:48:47,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:47,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101191609] [2023-08-24 08:48:47,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101191609] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:47,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513475272] [2023-08-24 08:48:47,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:48:47,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:47,089 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:47,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-24 08:48:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:47,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:48:47,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:47,354 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:48:47,354 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 08:48:47,385 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:48:47,385 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 08:48:47,438 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:48:47,439 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 08:48:47,725 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 08:48:47,856 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 08:48:47,873 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 08:48:47,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:47,970 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:47,971 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 08:48:48,636 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:48:48,637 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:48:48,681 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:48:48,682 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 08:48:49,093 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 08:48:49,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513475272] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:49,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:49,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:48:49,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31928506] [2023-08-24 08:48:49,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:49,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:48:49,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:49,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:48:49,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:48:49,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:48:49,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 749 transitions, 12281 flow. Second operand has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:49,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:49,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:48:49,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:52,406 INFO L124 PetriNetUnfolderBase]: 7337/10730 cut-off events. [2023-08-24 08:48:52,407 INFO L125 PetriNetUnfolderBase]: For 277323/277323 co-relation queries the response was YES. [2023-08-24 08:48:52,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77793 conditions, 10730 events. 7337/10730 cut-off events. For 277323/277323 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 60220 event pairs, 2627 based on Foata normal form. 1/10731 useless extension candidates. Maximal degree in co-relation 77559. Up to 10488 conditions per place. [2023-08-24 08:48:52,560 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 690 selfloop transitions, 92 changer transitions 1/783 dead transitions. [2023-08-24 08:48:52,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 783 transitions, 14581 flow [2023-08-24 08:48:52,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:48:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:48:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2769 transitions. [2023-08-24 08:48:52,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320143884892086 [2023-08-24 08:48:52,563 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2769 transitions. [2023-08-24 08:48:52,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2769 transitions. [2023-08-24 08:48:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2769 transitions. [2023-08-24 08:48:52,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.75) internal successors, (2769), 12 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:52,569 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 08:48:52,569 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 08:48:52,569 INFO L175 Difference]: Start difference. First operand has 438 places, 749 transitions, 12281 flow. Second operand 12 states and 2769 transitions. [2023-08-24 08:48:52,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 783 transitions, 14581 flow [2023-08-24 08:48:53,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 783 transitions, 14124 flow, removed 134 selfloop flow, removed 8 redundant places. [2023-08-24 08:48:53,526 INFO L231 Difference]: Finished difference. Result has 444 places, 757 transitions, 12552 flow [2023-08-24 08:48:53,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11824, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12552, PETRI_PLACES=444, PETRI_TRANSITIONS=757} [2023-08-24 08:48:53,527 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 412 predicate places. [2023-08-24 08:48:53,527 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 757 transitions, 12552 flow [2023-08-24 08:48:53,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:53,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:48:53,528 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 08:48:53,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-24 08:48:53,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-24 08:48:53,733 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:48:53,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:48:53,733 INFO L85 PathProgramCache]: Analyzing trace with hash -82199471, now seen corresponding path program 56 times [2023-08-24 08:48:53,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:48:53,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895488532] [2023-08-24 08:48:53,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:48:53,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:48:53,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:48:54,239 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 08:48:54,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:48:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895488532] [2023-08-24 08:48:54,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895488532] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:48:54,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841074217] [2023-08-24 08:48:54,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:48:54,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:48:54,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:48:54,241 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:48:54,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-24 08:48:54,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:48:54,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:48:54,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:48:54,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:48:54,529 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:48:54,530 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 08:48:54,558 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:48:54,558 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 08:48:54,686 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:48:54,686 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 08:48:54,827 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:48:54,827 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 08:48:54,991 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:54,991 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 08:48:55,059 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 08:48:55,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:48:55,285 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:48:55,285 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 08:48:55,299 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:48:55,492 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 08:48:55,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841074217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:48:55,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:48:55,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2023-08-24 08:48:55,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099073028] [2023-08-24 08:48:55,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:48:55,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 08:48:55,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:48:55,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 08:48:55,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2023-08-24 08:48:55,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:48:55,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 757 transitions, 12552 flow. Second operand has 24 states, 24 states have (on average 226.33333333333334) internal successors, (5432), 24 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:48:55,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:48:55,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:48:55,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:48:58,857 INFO L124 PetriNetUnfolderBase]: 7457/10903 cut-off events. [2023-08-24 08:48:58,858 INFO L125 PetriNetUnfolderBase]: For 314647/314647 co-relation queries the response was YES. [2023-08-24 08:48:58,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79973 conditions, 10903 events. 7457/10903 cut-off events. For 314647/314647 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 61283 event pairs, 2196 based on Foata normal form. 1/10904 useless extension candidates. Maximal degree in co-relation 79739. Up to 10417 conditions per place. [2023-08-24 08:48:59,004 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 659 selfloop transitions, 136 changer transitions 1/796 dead transitions. [2023-08-24 08:48:59,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 796 transitions, 15084 flow [2023-08-24 08:48:59,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:48:59,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:48:59,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2551 transitions. [2023-08-24 08:48:59,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33368214519293654 [2023-08-24 08:48:59,006 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2551 transitions. [2023-08-24 08:48:59,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2551 transitions. [2023-08-24 08:48:59,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:48:59,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2551 transitions. [2023-08-24 08:48:59,008 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 08:48:59,010 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 08:48:59,011 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 08:48:59,011 INFO L175 Difference]: Start difference. First operand has 444 places, 757 transitions, 12552 flow. Second operand 11 states and 2551 transitions. [2023-08-24 08:48:59,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 796 transitions, 15084 flow [2023-08-24 08:49:00,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 796 transitions, 14509 flow, removed 238 selfloop flow, removed 7 redundant places. [2023-08-24 08:49:00,519 INFO L231 Difference]: Finished difference. Result has 449 places, 767 transitions, 13009 flow [2023-08-24 08:49:00,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=11977, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=13009, PETRI_PLACES=449, PETRI_TRANSITIONS=767} [2023-08-24 08:49:00,520 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 417 predicate places. [2023-08-24 08:49:00,520 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 767 transitions, 13009 flow [2023-08-24 08:49:00,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 226.33333333333334) internal successors, (5432), 24 states have internal predecessors, (5432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:00,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:00,521 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 08:49:00,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:00,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-24 08:49:00,721 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:49:00,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:00,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2036017073, now seen corresponding path program 57 times [2023-08-24 08:49:00,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:00,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414890841] [2023-08-24 08:49:00,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:00,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:01,325 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 08:49:01,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:01,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414890841] [2023-08-24 08:49:01,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414890841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:01,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962383858] [2023-08-24 08:49:01,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:49:01,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:01,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:01,327 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:01,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-24 08:49:01,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:49:01,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:01,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:49:01,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:01,628 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:49:01,629 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 08:49:01,655 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:49:01,655 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 08:49:01,691 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:49:01,692 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 08:49:01,850 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:49:01,850 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 08:49:01,944 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:01,944 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 08:49:02,059 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 08:49:02,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:02,233 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:02,233 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 08:49:02,373 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:02,394 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:49:02,394 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 08:49:02,632 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 08:49:02,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962383858] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:02,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:02,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-08-24 08:49:02,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466024728] [2023-08-24 08:49:02,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:02,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:49:02,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:02,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:49:02,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:49:02,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:49:02,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 767 transitions, 13009 flow. Second operand has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:02,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:02,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:49:02,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:06,256 INFO L124 PetriNetUnfolderBase]: 7537/11020 cut-off events. [2023-08-24 08:49:06,257 INFO L125 PetriNetUnfolderBase]: For 325205/325205 co-relation queries the response was YES. [2023-08-24 08:49:06,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81263 conditions, 11020 events. 7537/11020 cut-off events. For 325205/325205 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 62136 event pairs, 2683 based on Foata normal form. 1/11021 useless extension candidates. Maximal degree in co-relation 81028. Up to 10778 conditions per place. [2023-08-24 08:49:06,401 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 708 selfloop transitions, 90 changer transitions 1/799 dead transitions. [2023-08-24 08:49:06,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 799 transitions, 15338 flow [2023-08-24 08:49:06,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:49:06,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:49:06,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2380 transitions. [2023-08-24 08:49:06,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31131458469587964 [2023-08-24 08:49:06,403 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2380 transitions. [2023-08-24 08:49:06,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2380 transitions. [2023-08-24 08:49:06,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:06,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2380 transitions. [2023-08-24 08:49:06,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.36363636363637) internal successors, (2380), 11 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:06,407 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 08:49:06,408 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 08:49:06,408 INFO L175 Difference]: Start difference. First operand has 449 places, 767 transitions, 13009 flow. Second operand 11 states and 2380 transitions. [2023-08-24 08:49:06,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 799 transitions, 15338 flow [2023-08-24 08:49:07,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 799 transitions, 14519 flow, removed 336 selfloop flow, removed 6 redundant places. [2023-08-24 08:49:07,966 INFO L231 Difference]: Finished difference. Result has 455 places, 773 transitions, 12902 flow [2023-08-24 08:49:07,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12194, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12902, PETRI_PLACES=455, PETRI_TRANSITIONS=773} [2023-08-24 08:49:07,966 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 423 predicate places. [2023-08-24 08:49:07,967 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 773 transitions, 12902 flow [2023-08-24 08:49:07,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:07,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:07,967 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 08:49:07,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:08,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:08,169 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:49:08,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:08,169 INFO L85 PathProgramCache]: Analyzing trace with hash -769576353, now seen corresponding path program 58 times [2023-08-24 08:49:08,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:08,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168488577] [2023-08-24 08:49:08,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:08,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:08,728 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 08:49:08,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:08,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168488577] [2023-08-24 08:49:08,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168488577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:08,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377486575] [2023-08-24 08:49:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:49:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:08,730 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:08,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-24 08:49:08,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:49:08,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:08,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:49:08,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:08,986 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 08:49:09,008 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:49:09,008 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 08:49:09,211 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:49:09,212 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 08:49:09,343 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:09,344 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 08:49:09,388 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 08:49:09,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:09,654 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:09,654 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 08:49:09,765 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:09,786 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:49:09,786 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 08:49:09,958 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 08:49:09,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377486575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:09,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:09,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-08-24 08:49:09,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554989407] [2023-08-24 08:49:09,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:09,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:49:09,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:09,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:49:09,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:49:09,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:49:09,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 773 transitions, 12902 flow. Second operand has 22 states, 22 states have (on average 226.63636363636363) internal successors, (4986), 22 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:09,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:09,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:49:09,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:13,308 INFO L124 PetriNetUnfolderBase]: 7597/11109 cut-off events. [2023-08-24 08:49:13,309 INFO L125 PetriNetUnfolderBase]: For 307216/307216 co-relation queries the response was YES. [2023-08-24 08:49:13,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80799 conditions, 11109 events. 7597/11109 cut-off events. For 307216/307216 co-relation queries the response was YES. Maximal size of possible extension queue 595. Compared 62742 event pairs, 2703 based on Foata normal form. 1/11110 useless extension candidates. Maximal degree in co-relation 80561. Up to 10853 conditions per place. [2023-08-24 08:49:13,462 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 715 selfloop transitions, 92 changer transitions 1/808 dead transitions. [2023-08-24 08:49:13,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 808 transitions, 15095 flow [2023-08-24 08:49:13,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:49:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:49:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2549 transitions. [2023-08-24 08:49:13,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33342053629823415 [2023-08-24 08:49:13,464 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2549 transitions. [2023-08-24 08:49:13,464 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2549 transitions. [2023-08-24 08:49:13,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:13,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2549 transitions. [2023-08-24 08:49:13,466 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.72727272727272) internal successors, (2549), 11 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:13,469 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 08:49:13,469 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 08:49:13,469 INFO L175 Difference]: Start difference. First operand has 455 places, 773 transitions, 12902 flow. Second operand 11 states and 2549 transitions. [2023-08-24 08:49:13,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 808 transitions, 15095 flow [2023-08-24 08:49:14,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 808 transitions, 14537 flow, removed 241 selfloop flow, removed 6 redundant places. [2023-08-24 08:49:14,818 INFO L231 Difference]: Finished difference. Result has 461 places, 778 transitions, 12874 flow [2023-08-24 08:49:14,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12344, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=773, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12874, PETRI_PLACES=461, PETRI_TRANSITIONS=778} [2023-08-24 08:49:14,818 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 429 predicate places. [2023-08-24 08:49:14,818 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 778 transitions, 12874 flow [2023-08-24 08:49:14,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 226.63636363636363) internal successors, (4986), 22 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:14,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:14,819 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 08:49:14,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:15,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:15,020 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:49:15,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:15,020 INFO L85 PathProgramCache]: Analyzing trace with hash -223415255, now seen corresponding path program 59 times [2023-08-24 08:49:15,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:15,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805609771] [2023-08-24 08:49:15,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:15,761 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 08:49:15,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:15,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805609771] [2023-08-24 08:49:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805609771] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984192340] [2023-08-24 08:49:15,764 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:49:15,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:15,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:15,765 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:15,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-24 08:49:16,004 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:49:16,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:16,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:49:16,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:16,046 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:49:16,047 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 08:49:16,074 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:49:16,074 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 08:49:16,111 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:49:16,111 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 08:49:16,265 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:49:16,265 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 08:49:16,407 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:16,408 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 08:49:16,420 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 08:49:16,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:16,515 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:16,515 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 08:49:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:17,052 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:49:17,052 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 08:49:17,503 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 08:49:17,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984192340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:17,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:17,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-08-24 08:49:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67498075] [2023-08-24 08:49:17,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:17,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:49:17,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:49:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:49:17,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:49:17,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 778 transitions, 12874 flow. Second operand has 23 states, 23 states have (on average 226.52173913043478) internal successors, (5210), 23 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:17,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:17,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:49:17,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:20,952 INFO L124 PetriNetUnfolderBase]: 7657/11198 cut-off events. [2023-08-24 08:49:20,952 INFO L125 PetriNetUnfolderBase]: For 310568/310568 co-relation queries the response was YES. [2023-08-24 08:49:21,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81231 conditions, 11198 events. 7657/11198 cut-off events. For 310568/310568 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 63542 event pairs, 2745 based on Foata normal form. 1/11199 useless extension candidates. Maximal degree in co-relation 80988. Up to 10946 conditions per place. [2023-08-24 08:49:21,117 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 718 selfloop transitions, 92 changer transitions 1/811 dead transitions. [2023-08-24 08:49:21,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 811 transitions, 15062 flow [2023-08-24 08:49:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:49:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:49:21,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2771 transitions. [2023-08-24 08:49:21,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33225419664268585 [2023-08-24 08:49:21,119 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2771 transitions. [2023-08-24 08:49:21,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2771 transitions. [2023-08-24 08:49:21,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:21,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2771 transitions. [2023-08-24 08:49:21,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.91666666666666) internal successors, (2771), 12 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:21,124 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 08:49:21,125 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 08:49:21,125 INFO L175 Difference]: Start difference. First operand has 461 places, 778 transitions, 12874 flow. Second operand 12 states and 2771 transitions. [2023-08-24 08:49:21,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 811 transitions, 15062 flow [2023-08-24 08:49:22,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 811 transitions, 14587 flow, removed 150 selfloop flow, removed 8 redundant places. [2023-08-24 08:49:22,897 INFO L231 Difference]: Finished difference. Result has 466 places, 783 transitions, 12935 flow [2023-08-24 08:49:22,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12399, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=12935, PETRI_PLACES=466, PETRI_TRANSITIONS=783} [2023-08-24 08:49:22,898 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 434 predicate places. [2023-08-24 08:49:22,898 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 783 transitions, 12935 flow [2023-08-24 08:49:22,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 226.52173913043478) internal successors, (5210), 23 states have internal predecessors, (5210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:22,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:22,898 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 08:49:22,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:23,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-24 08:49:23,104 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:49:23,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:23,104 INFO L85 PathProgramCache]: Analyzing trace with hash -915372703, now seen corresponding path program 60 times [2023-08-24 08:49:23,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:23,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504393697] [2023-08-24 08:49:23,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:23,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:23,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:23,933 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 08:49:23,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504393697] [2023-08-24 08:49:23,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504393697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196705710] [2023-08-24 08:49:23,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:49:23,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:23,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:23,935 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-24 08:49:24,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:49:24,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:24,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:49:24,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:24,233 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:49:24,233 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 08:49:24,276 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:49:24,277 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 08:49:24,315 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:49:24,315 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 08:49:24,488 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:49:24,489 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 08:49:24,683 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:24,684 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 08:49:24,995 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 08:49:24,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:28,341 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:28,342 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 08:49:28,355 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:28,565 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 08:49:28,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196705710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:28,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:28,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2023-08-24 08:49:28,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711633748] [2023-08-24 08:49:28,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:28,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:49:28,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:28,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:49:28,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=703, Unknown=1, NotChecked=0, Total=812 [2023-08-24 08:49:28,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 695 [2023-08-24 08:49:28,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 783 transitions, 12935 flow. Second operand has 29 states, 29 states have (on average 204.17241379310346) internal successors, (5921), 29 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:28,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:28,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 695 [2023-08-24 08:49:28,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:32,143 INFO L124 PetriNetUnfolderBase]: 7717/11287 cut-off events. [2023-08-24 08:49:32,143 INFO L125 PetriNetUnfolderBase]: For 321942/321942 co-relation queries the response was YES. [2023-08-24 08:49:32,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81799 conditions, 11287 events. 7717/11287 cut-off events. For 321942/321942 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63905 event pairs, 2314 based on Foata normal form. 1/11288 useless extension candidates. Maximal degree in co-relation 81555. Up to 10885 conditions per place. [2023-08-24 08:49:32,298 INFO L140 encePairwiseOnDemand]: 683/695 looper letters, 691 selfloop transitions, 123 changer transitions 1/815 dead transitions. [2023-08-24 08:49:32,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 815 transitions, 15108 flow [2023-08-24 08:49:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:49:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:49:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2510 transitions. [2023-08-24 08:49:32,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3009592326139089 [2023-08-24 08:49:32,301 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2510 transitions. [2023-08-24 08:49:32,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2510 transitions. [2023-08-24 08:49:32,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:32,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2510 transitions. [2023-08-24 08:49:32,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.16666666666666) internal successors, (2510), 12 states have internal predecessors, (2510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:32,305 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 08:49:32,306 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 08:49:32,306 INFO L175 Difference]: Start difference. First operand has 466 places, 783 transitions, 12935 flow. Second operand 12 states and 2510 transitions. [2023-08-24 08:49:32,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 815 transitions, 15108 flow [2023-08-24 08:49:33,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 815 transitions, 14626 flow, removed 153 selfloop flow, removed 9 redundant places. [2023-08-24 08:49:33,668 INFO L231 Difference]: Finished difference. Result has 470 places, 788 transitions, 13057 flow [2023-08-24 08:49:33,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12453, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13057, PETRI_PLACES=470, PETRI_TRANSITIONS=788} [2023-08-24 08:49:33,668 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 438 predicate places. [2023-08-24 08:49:33,668 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 788 transitions, 13057 flow [2023-08-24 08:49:33,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 204.17241379310346) internal successors, (5921), 29 states have internal predecessors, (5921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:33,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:33,669 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 08:49:33,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:33,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-24 08:49:33,869 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:49:33,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:33,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1436280549, now seen corresponding path program 61 times [2023-08-24 08:49:33,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:33,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554785357] [2023-08-24 08:49:33,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:33,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:34,372 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 08:49:34,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554785357] [2023-08-24 08:49:34,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554785357] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:34,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698954995] [2023-08-24 08:49:34,373 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:49:34,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:34,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:34,374 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:34,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-24 08:49:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:34,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:49:34,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:34,819 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:34,819 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 08:49:34,832 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 08:49:34,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:34,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:34,931 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 08:49:35,109 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:49:35,109 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 08:49:35,188 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 08:49:35,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698954995] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:35,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:35,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:49:35,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821669791] [2023-08-24 08:49:35,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:35,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:49:35,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:35,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:49:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:49:35,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:49:35,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 788 transitions, 13057 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 08:49:35,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:35,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:49:35,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:38,554 INFO L124 PetriNetUnfolderBase]: 7807/11420 cut-off events. [2023-08-24 08:49:38,554 INFO L125 PetriNetUnfolderBase]: For 335789/335789 co-relation queries the response was YES. [2023-08-24 08:49:38,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82765 conditions, 11420 events. 7807/11420 cut-off events. For 335789/335789 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 65007 event pairs, 2795 based on Foata normal form. 1/11421 useless extension candidates. Maximal degree in co-relation 82520. Up to 11160 conditions per place. [2023-08-24 08:49:38,710 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 738 selfloop transitions, 87 changer transitions 1/826 dead transitions. [2023-08-24 08:49:38,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 826 transitions, 15314 flow [2023-08-24 08:49:38,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:49:38,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:49:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2229 transitions. [2023-08-24 08:49:38,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3563549160671463 [2023-08-24 08:49:38,713 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2229 transitions. [2023-08-24 08:49:38,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2229 transitions. [2023-08-24 08:49:38,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:38,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2229 transitions. [2023-08-24 08:49:38,714 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 08:49:38,716 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 08:49:38,717 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 08:49:38,717 INFO L175 Difference]: Start difference. First operand has 470 places, 788 transitions, 13057 flow. Second operand 9 states and 2229 transitions. [2023-08-24 08:49:38,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 826 transitions, 15314 flow [2023-08-24 08:49:40,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 826 transitions, 14756 flow, removed 156 selfloop flow, removed 11 redundant places. [2023-08-24 08:49:40,020 INFO L231 Difference]: Finished difference. Result has 469 places, 794 transitions, 13044 flow [2023-08-24 08:49:40,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12499, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13044, PETRI_PLACES=469, PETRI_TRANSITIONS=794} [2023-08-24 08:49:40,021 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 437 predicate places. [2023-08-24 08:49:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 794 transitions, 13044 flow [2023-08-24 08:49:40,021 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 08:49:40,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:40,021 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 08:49:40,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-08-24 08:49:40,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:40,226 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-24 08:49:40,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:40,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1009559005, now seen corresponding path program 62 times [2023-08-24 08:49:40,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:40,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670692797] [2023-08-24 08:49:40,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:40,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:40,724 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 08:49:40,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670692797] [2023-08-24 08:49:40,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670692797] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862130762] [2023-08-24 08:49:40,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:49:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:40,725 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:40,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-24 08:49:40,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:49:40,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:40,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:49:40,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:41,175 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:41,175 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 08:49:41,187 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 08:49:41,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:41,309 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:41,309 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 08:49:41,479 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 08:49:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862130762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:41,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:41,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:49:41,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129442291] [2023-08-24 08:49:41,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:49:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:49:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:49:41,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:49:41,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 794 transitions, 13044 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 08:49:41,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:41,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:49:41,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:44,892 INFO L124 PetriNetUnfolderBase]: 7927/11595 cut-off events. [2023-08-24 08:49:44,892 INFO L125 PetriNetUnfolderBase]: For 345293/345293 co-relation queries the response was YES. [2023-08-24 08:49:45,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83822 conditions, 11595 events. 7927/11595 cut-off events. For 345293/345293 co-relation queries the response was YES. Maximal size of possible extension queue 624. Compared 66218 event pairs, 2859 based on Foata normal form. 1/11596 useless extension candidates. Maximal degree in co-relation 83579. Up to 11307 conditions per place. [2023-08-24 08:49:45,060 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 740 selfloop transitions, 99 changer transitions 1/840 dead transitions. [2023-08-24 08:49:45,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 840 transitions, 15478 flow [2023-08-24 08:49:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:49:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:49:45,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2225 transitions. [2023-08-24 08:49:45,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35571542765787373 [2023-08-24 08:49:45,062 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2225 transitions. [2023-08-24 08:49:45,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2225 transitions. [2023-08-24 08:49:45,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:45,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2225 transitions. [2023-08-24 08:49:45,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.22222222222223) internal successors, (2225), 9 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:45,066 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 08:49:45,066 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 08:49:45,066 INFO L175 Difference]: Start difference. First operand has 469 places, 794 transitions, 13044 flow. Second operand 9 states and 2225 transitions. [2023-08-24 08:49:45,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 840 transitions, 15478 flow [2023-08-24 08:49:46,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 840 transitions, 15004 flow, removed 156 selfloop flow, removed 5 redundant places. [2023-08-24 08:49:46,567 INFO L231 Difference]: Finished difference. Result has 477 places, 813 transitions, 13454 flow [2023-08-24 08:49:46,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=12574, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=794, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13454, PETRI_PLACES=477, PETRI_TRANSITIONS=813} [2023-08-24 08:49:46,568 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 445 predicate places. [2023-08-24 08:49:46,568 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 813 transitions, 13454 flow [2023-08-24 08:49:46,568 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 08:49:46,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:46,568 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 08:49:46,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:46,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-08-24 08:49:46,769 INFO L420 AbstractCegarLoop]: === Iteration 70 === 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 08:49:46,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:46,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1056707357, now seen corresponding path program 63 times [2023-08-24 08:49:46,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:46,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287804360] [2023-08-24 08:49:46,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:46,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:47,207 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 08:49:47,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:47,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287804360] [2023-08-24 08:49:47,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287804360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:47,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890425016] [2023-08-24 08:49:47,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:49:47,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:47,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:47,209 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:47,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-24 08:49:47,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:49:47,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:47,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:49:47,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:47,695 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:47,695 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 08:49:47,706 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 08:49:47,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:47,832 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:47,832 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 08:49:47,964 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 08:49:47,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890425016] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:47,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:47,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:49:47,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459982466] [2023-08-24 08:49:47,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:47,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:49:47,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:47,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:49:47,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:49:47,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:49:47,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 813 transitions, 13454 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 08:49:47,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:47,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:49:47,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:49:51,659 INFO L124 PetriNetUnfolderBase]: 7987/11684 cut-off events. [2023-08-24 08:49:51,659 INFO L125 PetriNetUnfolderBase]: For 357726/357726 co-relation queries the response was YES. [2023-08-24 08:49:51,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84714 conditions, 11684 events. 7987/11684 cut-off events. For 357726/357726 co-relation queries the response was YES. Maximal size of possible extension queue 628. Compared 66815 event pairs, 2877 based on Foata normal form. 1/11685 useless extension candidates. Maximal degree in co-relation 84466. Up to 11396 conditions per place. [2023-08-24 08:49:51,824 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 754 selfloop transitions, 98 changer transitions 1/853 dead transitions. [2023-08-24 08:49:51,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 853 transitions, 15836 flow [2023-08-24 08:49:51,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:49:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:49:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2227 transitions. [2023-08-24 08:49:51,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35603517186251 [2023-08-24 08:49:51,826 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2227 transitions. [2023-08-24 08:49:51,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2227 transitions. [2023-08-24 08:49:51,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:49:51,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2227 transitions. [2023-08-24 08:49:51,828 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 08:49:51,830 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 08:49:51,830 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 08:49:51,830 INFO L175 Difference]: Start difference. First operand has 477 places, 813 transitions, 13454 flow. Second operand 9 states and 2227 transitions. [2023-08-24 08:49:51,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 853 transitions, 15836 flow [2023-08-24 08:49:53,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 853 transitions, 15398 flow, removed 170 selfloop flow, removed 2 redundant places. [2023-08-24 08:49:53,336 INFO L231 Difference]: Finished difference. Result has 487 places, 824 transitions, 13730 flow [2023-08-24 08:49:53,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=13016, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=715, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13730, PETRI_PLACES=487, PETRI_TRANSITIONS=824} [2023-08-24 08:49:53,336 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 455 predicate places. [2023-08-24 08:49:53,336 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 824 transitions, 13730 flow [2023-08-24 08:49:53,337 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 08:49:53,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:49:53,337 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 08:49:53,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-24 08:49:53,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-24 08:49:53,537 INFO L420 AbstractCegarLoop]: === Iteration 71 === 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 08:49:53,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:49:53,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1804780309, now seen corresponding path program 64 times [2023-08-24 08:49:53,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:49:53,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312502417] [2023-08-24 08:49:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:49:53,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:49:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:49:54,421 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 08:49:54,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:49:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312502417] [2023-08-24 08:49:54,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312502417] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:49:54,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657357111] [2023-08-24 08:49:54,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:49:54,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:49:54,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:49:54,423 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:49:54,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-24 08:49:54,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:49:54,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:49:54,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:49:54,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:49:54,713 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:49:54,713 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 08:49:54,752 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:49:54,752 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 08:49:54,801 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:49:54,802 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 08:49:54,964 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:49:54,964 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 08:49:55,116 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:55,116 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 08:49:55,135 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 08:49:55,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:49:55,257 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:49:55,258 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 171 treesize of output 191 [2023-08-24 08:49:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:49:55,815 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:49:55,815 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 38 treesize of output 61 [2023-08-24 08:49:56,187 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 08:49:56,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657357111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:49:56,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:49:56,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 28 [2023-08-24 08:49:56,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293213458] [2023-08-24 08:49:56,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:49:56,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:49:56,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:49:56,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:49:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:49:56,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:49:56,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 824 transitions, 13730 flow. Second operand has 30 states, 30 states have (on average 203.13333333333333) internal successors, (6094), 30 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:49:56,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:49:56,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:49:56,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:50:00,186 INFO L124 PetriNetUnfolderBase]: 8097/11843 cut-off events. [2023-08-24 08:50:00,186 INFO L125 PetriNetUnfolderBase]: For 382847/382847 co-relation queries the response was YES. [2023-08-24 08:50:00,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86675 conditions, 11843 events. 8097/11843 cut-off events. For 382847/382847 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 67869 event pairs, 2921 based on Foata normal form. 1/11844 useless extension candidates. Maximal degree in co-relation 86423. Up to 11569 conditions per place. [2023-08-24 08:50:00,365 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 758 selfloop transitions, 103 changer transitions 1/862 dead transitions. [2023-08-24 08:50:00,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 862 transitions, 16542 flow [2023-08-24 08:50:00,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:50:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:50:00,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2897 transitions. [2023-08-24 08:50:00,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29773895169578624 [2023-08-24 08:50:00,367 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2897 transitions. [2023-08-24 08:50:00,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2897 transitions. [2023-08-24 08:50:00,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:50:00,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2897 transitions. [2023-08-24 08:50:00,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 206.92857142857142) internal successors, (2897), 14 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:00,373 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 08:50:00,373 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 08:50:00,373 INFO L175 Difference]: Start difference. First operand has 487 places, 824 transitions, 13730 flow. Second operand 14 states and 2897 transitions. [2023-08-24 08:50:00,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 862 transitions, 16542 flow [2023-08-24 08:50:02,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 862 transitions, 16006 flow, removed 178 selfloop flow, removed 6 redundant places. [2023-08-24 08:50:02,385 INFO L231 Difference]: Finished difference. Result has 496 places, 837 transitions, 14332 flow [2023-08-24 08:50:02,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=13194, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=824, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=14332, PETRI_PLACES=496, PETRI_TRANSITIONS=837} [2023-08-24 08:50:02,385 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 464 predicate places. [2023-08-24 08:50:02,385 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 837 transitions, 14332 flow [2023-08-24 08:50:02,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 203.13333333333333) internal successors, (6094), 30 states have internal predecessors, (6094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:02,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:50:02,386 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 08:50:02,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-24 08:50:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:02,589 INFO L420 AbstractCegarLoop]: === Iteration 72 === 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 08:50:02,589 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:50:02,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1093331815, now seen corresponding path program 65 times [2023-08-24 08:50:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:50:02,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806164956] [2023-08-24 08:50:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:50:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:50:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:03,669 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 08:50:03,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:50:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806164956] [2023-08-24 08:50:03,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806164956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:50:03,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101702357] [2023-08-24 08:50:03,669 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:50:03,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:03,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:50:03,670 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:50:03,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-24 08:50:03,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:50:03,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:50:03,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 95 conjunts are in the unsatisfiable core [2023-08-24 08:50:03,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:50:03,979 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:50:03,979 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 08:50:04,026 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:50:04,026 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 08:50:04,086 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:50:04,086 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 08:50:04,297 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:50:04,297 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 08:50:04,537 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:04,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:04,541 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 26 [2023-08-24 08:50:04,559 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 08:50:04,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:50:04,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:04,740 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 171 treesize of output 191 [2023-08-24 08:50:05,426 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:05,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:05,472 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:50:05,472 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 61 [2023-08-24 08:50:05,942 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 08:50:05,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101702357] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:50:05,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:50:05,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 33 [2023-08-24 08:50:05,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501351073] [2023-08-24 08:50:05,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:50:05,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 08:50:05,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:50:05,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 08:50:05,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 08:50:05,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 695 [2023-08-24 08:50:05,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 837 transitions, 14332 flow. Second operand has 35 states, 35 states have (on average 188.88571428571427) internal successors, (6611), 35 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:05,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:50:05,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 695 [2023-08-24 08:50:05,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:50:11,013 INFO L124 PetriNetUnfolderBase]: 8379/12249 cut-off events. [2023-08-24 08:50:11,013 INFO L125 PetriNetUnfolderBase]: For 470529/470529 co-relation queries the response was YES. [2023-08-24 08:50:11,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92371 conditions, 12249 events. 8379/12249 cut-off events. For 470529/470529 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 70223 event pairs, 2720 based on Foata normal form. 1/12250 useless extension candidates. Maximal degree in co-relation 92113. Up to 11227 conditions per place. [2023-08-24 08:50:11,197 INFO L140 encePairwiseOnDemand]: 678/695 looper letters, 654 selfloop transitions, 266 changer transitions 1/921 dead transitions. [2023-08-24 08:50:11,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 921 transitions, 18581 flow [2023-08-24 08:50:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 08:50:11,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 08:50:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3665 transitions. [2023-08-24 08:50:11,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2775463839454752 [2023-08-24 08:50:11,200 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3665 transitions. [2023-08-24 08:50:11,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3665 transitions. [2023-08-24 08:50:11,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:50:11,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3665 transitions. [2023-08-24 08:50:11,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 192.89473684210526) internal successors, (3665), 19 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:11,207 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 08:50:11,207 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 08:50:11,207 INFO L175 Difference]: Start difference. First operand has 496 places, 837 transitions, 14332 flow. Second operand 19 states and 3665 transitions. [2023-08-24 08:50:11,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 921 transitions, 18581 flow [2023-08-24 08:50:13,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 921 transitions, 17564 flow, removed 479 selfloop flow, removed 7 redundant places. [2023-08-24 08:50:13,550 INFO L231 Difference]: Finished difference. Result has 513 places, 880 transitions, 16152 flow [2023-08-24 08:50:13,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=13445, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=16152, PETRI_PLACES=513, PETRI_TRANSITIONS=880} [2023-08-24 08:50:13,551 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 481 predicate places. [2023-08-24 08:50:13,551 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 880 transitions, 16152 flow [2023-08-24 08:50:13,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 188.88571428571427) internal successors, (6611), 35 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:13,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:50:13,552 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 08:50:13,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-24 08:50:13,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2023-08-24 08:50:13,757 INFO L420 AbstractCegarLoop]: === Iteration 73 === 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 08:50:13,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:50:13,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1658805453, now seen corresponding path program 66 times [2023-08-24 08:50:13,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:50:13,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204532080] [2023-08-24 08:50:13,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:50:13,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:50:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:14,723 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 08:50:14,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:50:14,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204532080] [2023-08-24 08:50:14,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204532080] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:50:14,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850149915] [2023-08-24 08:50:14,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:50:14,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:14,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:50:14,724 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:50:14,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-24 08:50:14,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:50:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:50:14,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:50:15,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:50:15,035 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:50:15,036 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 08:50:15,078 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:50:15,079 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 08:50:15,118 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:50:15,119 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 08:50:15,291 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:50:15,292 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 08:50:15,468 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:15,468 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 08:50:15,565 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 08:50:15,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:50:15,876 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:15,876 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 08:50:16,078 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:16,316 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 08:50:16,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850149915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:50:16,317 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:50:16,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 28 [2023-08-24 08:50:16,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002822828] [2023-08-24 08:50:16,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:50:16,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:50:16,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:50:16,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:50:16,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:50:16,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 695 [2023-08-24 08:50:16,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 880 transitions, 16152 flow. Second operand has 30 states, 30 states have (on average 195.13333333333333) internal successors, (5854), 30 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:16,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:50:16,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 695 [2023-08-24 08:50:16,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:50:20,631 INFO L124 PetriNetUnfolderBase]: 8499/12422 cut-off events. [2023-08-24 08:50:20,631 INFO L125 PetriNetUnfolderBase]: For 513787/513787 co-relation queries the response was YES. [2023-08-24 08:50:20,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99550 conditions, 12422 events. 8499/12422 cut-off events. For 513787/513787 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 71392 event pairs, 2961 based on Foata normal form. 1/12423 useless extension candidates. Maximal degree in co-relation 99284. Up to 12076 conditions per place. [2023-08-24 08:50:20,827 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 804 selfloop transitions, 111 changer transitions 1/916 dead transitions. [2023-08-24 08:50:20,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 916 transitions, 19084 flow [2023-08-24 08:50:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:50:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:50:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2400 transitions. [2023-08-24 08:50:20,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28776978417266186 [2023-08-24 08:50:20,829 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2400 transitions. [2023-08-24 08:50:20,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2400 transitions. [2023-08-24 08:50:20,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:50:20,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2400 transitions. [2023-08-24 08:50:20,831 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 200.0) internal successors, (2400), 12 states have internal predecessors, (2400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:20,834 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 08:50:20,834 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 08:50:20,834 INFO L175 Difference]: Start difference. First operand has 513 places, 880 transitions, 16152 flow. Second operand 12 states and 2400 transitions. [2023-08-24 08:50:20,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 916 transitions, 19084 flow [2023-08-24 08:50:24,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 916 transitions, 17379 flow, removed 781 selfloop flow, removed 11 redundant places. [2023-08-24 08:50:24,220 INFO L231 Difference]: Finished difference. Result has 515 places, 890 transitions, 15580 flow [2023-08-24 08:50:24,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=14455, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=880, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15580, PETRI_PLACES=515, PETRI_TRANSITIONS=890} [2023-08-24 08:50:24,221 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 483 predicate places. [2023-08-24 08:50:24,221 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 890 transitions, 15580 flow [2023-08-24 08:50:24,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 195.13333333333333) internal successors, (5854), 30 states have internal predecessors, (5854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:24,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:50:24,221 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 08:50:24,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-08-24 08:50:24,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:24,422 INFO L420 AbstractCegarLoop]: === Iteration 74 === 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 08:50:24,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:50:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1091384791, now seen corresponding path program 67 times [2023-08-24 08:50:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:50:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573004913] [2023-08-24 08:50:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:50:24,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:50:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:25,479 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 08:50:25,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:50:25,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573004913] [2023-08-24 08:50:25,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573004913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:50:25,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416216946] [2023-08-24 08:50:25,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:50:25,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:25,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:50:25,480 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:50:25,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-24 08:50:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:25,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:50:25,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:50:25,783 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:50:25,783 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 08:50:25,830 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:50:25,830 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 08:50:25,885 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:50:25,885 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 08:50:26,115 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 08:50:26,297 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 08:50:26,323 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 08:50:26,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:50:26,454 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:26,455 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 171 treesize of output 191 [2023-08-24 08:50:27,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:27,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:27,085 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:50:27,085 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 38 treesize of output 61 [2023-08-24 08:50:27,491 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 08:50:27,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416216946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:50:27,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:50:27,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 32 [2023-08-24 08:50:27,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339256219] [2023-08-24 08:50:27,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:50:27,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 08:50:27,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:50:27,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 08:50:27,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 08:50:27,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:50:27,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 890 transitions, 15580 flow. Second operand has 34 states, 34 states have (on average 203.05882352941177) internal successors, (6904), 34 states have internal predecessors, (6904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:27,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:50:27,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:50:27,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:50:32,193 INFO L124 PetriNetUnfolderBase]: 8587/12551 cut-off events. [2023-08-24 08:50:32,193 INFO L125 PetriNetUnfolderBase]: For 448785/448785 co-relation queries the response was YES. [2023-08-24 08:50:32,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97832 conditions, 12551 events. 8587/12551 cut-off events. For 448785/448785 co-relation queries the response was YES. Maximal size of possible extension queue 682. Compared 72316 event pairs, 3031 based on Foata normal form. 1/12552 useless extension candidates. Maximal degree in co-relation 97568. Up to 12267 conditions per place. [2023-08-24 08:50:32,390 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 818 selfloop transitions, 104 changer transitions 1/923 dead transitions. [2023-08-24 08:50:32,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 529 places, 923 transitions, 18080 flow [2023-08-24 08:50:32,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:50:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:50:32,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3101 transitions. [2023-08-24 08:50:32,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974580335731415 [2023-08-24 08:50:32,393 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3101 transitions. [2023-08-24 08:50:32,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3101 transitions. [2023-08-24 08:50:32,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:50:32,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3101 transitions. [2023-08-24 08:50:32,395 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 08:50:32,399 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 08:50:32,399 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 08:50:32,399 INFO L175 Difference]: Start difference. First operand has 515 places, 890 transitions, 15580 flow. Second operand 15 states and 3101 transitions. [2023-08-24 08:50:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 529 places, 923 transitions, 18080 flow [2023-08-24 08:50:34,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 923 transitions, 17149 flow, removed 407 selfloop flow, removed 7 redundant places. [2023-08-24 08:50:34,942 INFO L231 Difference]: Finished difference. Result has 524 places, 896 transitions, 15312 flow [2023-08-24 08:50:34,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=14649, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15312, PETRI_PLACES=524, PETRI_TRANSITIONS=896} [2023-08-24 08:50:34,943 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 492 predicate places. [2023-08-24 08:50:34,943 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 896 transitions, 15312 flow [2023-08-24 08:50:34,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 203.05882352941177) internal successors, (6904), 34 states have internal predecessors, (6904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:34,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:50:34,944 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 08:50:34,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2023-08-24 08:50:35,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:35,144 INFO L420 AbstractCegarLoop]: === Iteration 75 === 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 08:50:35,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:50:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1876580699, now seen corresponding path program 68 times [2023-08-24 08:50:35,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:50:35,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751272487] [2023-08-24 08:50:35,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:50:35,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:50:35,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:35,697 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 08:50:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:50:35,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751272487] [2023-08-24 08:50:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751272487] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:50:35,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334365212] [2023-08-24 08:50:35,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:50:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:50:35,699 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:50:35,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-08-24 08:50:35,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:50:35,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:50:35,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:50:35,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:50:36,010 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:50:36,011 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 08:50:36,047 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:50:36,047 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 08:50:36,103 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:50:36,104 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 08:50:36,356 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 08:50:36,539 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 08:50:36,561 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 08:50:36,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:50:36,657 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:36,657 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 195 treesize of output 215 [2023-08-24 08:50:37,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:37,231 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:37,276 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:50:37,276 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 08:50:37,659 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 08:50:37,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334365212] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:50:37,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:50:37,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:50:37,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757142727] [2023-08-24 08:50:37,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:50:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:50:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:50:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:50:37,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:50:37,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:50:37,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 896 transitions, 15312 flow. Second operand has 29 states, 29 states have (on average 226.27586206896552) internal successors, (6562), 29 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:37,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:50:37,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:50:37,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:50:41,987 INFO L124 PetriNetUnfolderBase]: 8675/12680 cut-off events. [2023-08-24 08:50:41,987 INFO L125 PetriNetUnfolderBase]: For 430142/430142 co-relation queries the response was YES. [2023-08-24 08:50:42,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97690 conditions, 12680 events. 8675/12680 cut-off events. For 430142/430142 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 73270 event pairs, 3091 based on Foata normal form. 1/12681 useless extension candidates. Maximal degree in co-relation 97420. Up to 12428 conditions per place. [2023-08-24 08:50:42,181 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 836 selfloop transitions, 93 changer transitions 1/930 dead transitions. [2023-08-24 08:50:42,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 930 transitions, 17870 flow [2023-08-24 08:50:42,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:50:42,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:50:42,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2769 transitions. [2023-08-24 08:50:42,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3320143884892086 [2023-08-24 08:50:42,183 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2769 transitions. [2023-08-24 08:50:42,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2769 transitions. [2023-08-24 08:50:42,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:50:42,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2769 transitions. [2023-08-24 08:50:42,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 230.75) internal successors, (2769), 12 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:42,188 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 08:50:42,188 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 08:50:42,188 INFO L175 Difference]: Start difference. First operand has 524 places, 896 transitions, 15312 flow. Second operand 12 states and 2769 transitions. [2023-08-24 08:50:42,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 930 transitions, 17870 flow [2023-08-24 08:50:44,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 930 transitions, 17274 flow, removed 196 selfloop flow, removed 12 redundant places. [2023-08-24 08:50:44,097 INFO L231 Difference]: Finished difference. Result has 526 places, 904 transitions, 15416 flow [2023-08-24 08:50:44,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=14720, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=896, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=15416, PETRI_PLACES=526, PETRI_TRANSITIONS=904} [2023-08-24 08:50:44,098 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 494 predicate places. [2023-08-24 08:50:44,098 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 904 transitions, 15416 flow [2023-08-24 08:50:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 226.27586206896552) internal successors, (6562), 29 states have internal predecessors, (6562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:44,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:50:44,099 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 08:50:44,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-08-24 08:50:44,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:44,299 INFO L420 AbstractCegarLoop]: === Iteration 76 === 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 08:50:44,299 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:50:44,299 INFO L85 PathProgramCache]: Analyzing trace with hash -736999401, now seen corresponding path program 69 times [2023-08-24 08:50:44,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:50:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292523902] [2023-08-24 08:50:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:50:44,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:50:44,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:44,791 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 08:50:44,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:50:44,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292523902] [2023-08-24 08:50:44,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292523902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:50:44,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685529094] [2023-08-24 08:50:44,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:50:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:44,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:50:44,792 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:50:44,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-08-24 08:50:45,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:50:45,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:50:45,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:50:45,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:50:45,109 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 08:50:45,131 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:50:45,131 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 08:50:45,329 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:50:45,329 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 08:50:45,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:45,421 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 08:50:45,503 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 08:50:45,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:50:46,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:46,260 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 08:50:46,383 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:46,402 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 08:50:46,402 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 08:50:46,572 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 08:50:46,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685529094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:50:46,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:50:46,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 20 [2023-08-24 08:50:46,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71264965] [2023-08-24 08:50:46,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:50:46,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 08:50:46,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:50:46,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 08:50:46,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 08:50:46,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:50:46,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 904 transitions, 15416 flow. Second operand has 22 states, 22 states have (on average 226.45454545454547) internal successors, (4982), 22 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:46,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:50:46,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:50:46,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:50:50,785 INFO L124 PetriNetUnfolderBase]: 8763/12809 cut-off events. [2023-08-24 08:50:50,785 INFO L125 PetriNetUnfolderBase]: For 459640/459640 co-relation queries the response was YES. [2023-08-24 08:50:50,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99065 conditions, 12809 events. 8763/12809 cut-off events. For 459640/459640 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 74244 event pairs, 3115 based on Foata normal form. 1/12810 useless extension candidates. Maximal degree in co-relation 98794. Up to 12553 conditions per place. [2023-08-24 08:50:50,990 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 844 selfloop transitions, 93 changer transitions 1/938 dead transitions. [2023-08-24 08:50:50,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 938 transitions, 18158 flow [2023-08-24 08:50:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:50:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:50:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2547 transitions. [2023-08-24 08:50:50,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3331589274035317 [2023-08-24 08:50:50,992 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2547 transitions. [2023-08-24 08:50:50,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2547 transitions. [2023-08-24 08:50:50,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:50:50,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2547 transitions. [2023-08-24 08:50:50,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 231.54545454545453) internal successors, (2547), 11 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:50,996 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 08:50:50,997 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 08:50:50,997 INFO L175 Difference]: Start difference. First operand has 526 places, 904 transitions, 15416 flow. Second operand 11 states and 2547 transitions. [2023-08-24 08:50:50,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 938 transitions, 18158 flow [2023-08-24 08:50:53,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 938 transitions, 17569 flow, removed 212 selfloop flow, removed 7 redundant places. [2023-08-24 08:50:53,234 INFO L231 Difference]: Finished difference. Result has 531 places, 910 transitions, 15663 flow [2023-08-24 08:50:53,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=14827, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15663, PETRI_PLACES=531, PETRI_TRANSITIONS=910} [2023-08-24 08:50:53,235 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 499 predicate places. [2023-08-24 08:50:53,235 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 910 transitions, 15663 flow [2023-08-24 08:50:53,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 226.45454545454547) internal successors, (4982), 22 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:53,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:50:53,235 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 08:50:53,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-08-24 08:50:53,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-24 08:50:53,437 INFO L420 AbstractCegarLoop]: === Iteration 77 === 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 08:50:53,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:50:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash 825632221, now seen corresponding path program 70 times [2023-08-24 08:50:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:50:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573412602] [2023-08-24 08:50:53,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:50:53,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:50:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:50:54,123 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 08:50:54,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:50:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573412602] [2023-08-24 08:50:54,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573412602] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:50:54,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529578975] [2023-08-24 08:50:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:50:54,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:50:54,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:50:54,125 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:50:54,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-08-24 08:50:54,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:50:54,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:50:54,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:50:54,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:50:54,487 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:50:54,487 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 08:50:54,529 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:50:54,529 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 08:50:54,567 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:50:54,567 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 08:50:54,792 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:50:54,792 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 08:50:54,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:54,913 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 08:50:55,008 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 08:50:55,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:50:56,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:50:56,386 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 08:50:56,507 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:50:56,749 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 08:50:56,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529578975] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:50:56,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:50:56,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2023-08-24 08:50:56,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584742543] [2023-08-24 08:50:56,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:50:56,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:50:56,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:50:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:50:56,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=705, Unknown=1, NotChecked=0, Total=812 [2023-08-24 08:50:56,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 695 [2023-08-24 08:50:56,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 910 transitions, 15663 flow. Second operand has 29 states, 29 states have (on average 194.3448275862069) internal successors, (5636), 29 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:50:56,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:50:56,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 695 [2023-08-24 08:50:56,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:51:01,774 INFO L124 PetriNetUnfolderBase]: 8844/12928 cut-off events. [2023-08-24 08:51:01,775 INFO L125 PetriNetUnfolderBase]: For 473272/473272 co-relation queries the response was YES. [2023-08-24 08:51:01,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99739 conditions, 12928 events. 8844/12928 cut-off events. For 473272/473272 co-relation queries the response was YES. Maximal size of possible extension queue 710. Compared 74965 event pairs, 3139 based on Foata normal form. 1/12929 useless extension candidates. Maximal degree in co-relation 99459. Up to 12652 conditions per place. [2023-08-24 08:51:01,972 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 843 selfloop transitions, 116 changer transitions 1/960 dead transitions. [2023-08-24 08:51:01,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 960 transitions, 18456 flow [2023-08-24 08:51:01,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:51:01,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:51:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3570 transitions. [2023-08-24 08:51:01,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2853717026378897 [2023-08-24 08:51:01,975 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3570 transitions. [2023-08-24 08:51:01,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3570 transitions. [2023-08-24 08:51:01,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:51:01,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3570 transitions. [2023-08-24 08:51:01,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.33333333333334) internal successors, (3570), 18 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:01,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 695.0) internal successors, (13205), 19 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:01,982 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 695.0) internal successors, (13205), 19 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:01,982 INFO L175 Difference]: Start difference. First operand has 531 places, 910 transitions, 15663 flow. Second operand 18 states and 3570 transitions. [2023-08-24 08:51:01,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 960 transitions, 18456 flow [2023-08-24 08:51:04,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 960 transitions, 17736 flow, removed 300 selfloop flow, removed 7 redundant places. [2023-08-24 08:51:04,914 INFO L231 Difference]: Finished difference. Result has 544 places, 924 transitions, 15743 flow [2023-08-24 08:51:04,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=14957, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=910, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=15743, PETRI_PLACES=544, PETRI_TRANSITIONS=924} [2023-08-24 08:51:04,914 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 512 predicate places. [2023-08-24 08:51:04,914 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 924 transitions, 15743 flow [2023-08-24 08:51:04,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 194.3448275862069) internal successors, (5636), 29 states have internal predecessors, (5636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:04,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:51:04,915 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 08:51:04,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-08-24 08:51:05,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:05,115 INFO L420 AbstractCegarLoop]: === Iteration 78 === 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 08:51:05,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:51:05,116 INFO L85 PathProgramCache]: Analyzing trace with hash 256140947, now seen corresponding path program 71 times [2023-08-24 08:51:05,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:51:05,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481378640] [2023-08-24 08:51:05,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:51:05,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:51:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:51:05,722 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 08:51:05,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:51:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481378640] [2023-08-24 08:51:05,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481378640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:51:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141767540] [2023-08-24 08:51:05,723 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:51:05,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:05,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:51:05,724 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:51:05,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-08-24 08:51:05,994 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:51:05,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:51:05,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 99 conjunts are in the unsatisfiable core [2023-08-24 08:51:06,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:51:06,037 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:51:06,037 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 08:51:06,068 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:51:06,068 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 08:51:06,108 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:51:06,108 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 08:51:06,415 INFO L322 Elim1Store]: treesize reduction 23, result has 32.4 percent of original size [2023-08-24 08:51:06,416 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 34 [2023-08-24 08:51:06,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 17 [2023-08-24 08:51:06,487 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 08:51:06,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:51:06,592 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:06,592 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 08:51:06,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:06,734 INFO L322 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2023-08-24 08:51:06,734 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 71 [2023-08-24 08:51:07,043 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 08:51:07,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141767540] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:51:07,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:51:07,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:51:07,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320508724] [2023-08-24 08:51:07,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:51:07,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:51:07,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:51:07,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:51:07,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:51:07,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:51:07,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 924 transitions, 15743 flow. Second operand has 29 states, 29 states have (on average 211.3448275862069) internal successors, (6129), 29 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:07,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:51:07,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:51:07,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:51:11,618 INFO L124 PetriNetUnfolderBase]: 8904/13017 cut-off events. [2023-08-24 08:51:11,618 INFO L125 PetriNetUnfolderBase]: For 471459/471459 co-relation queries the response was YES. [2023-08-24 08:51:11,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99989 conditions, 13017 events. 8904/13017 cut-off events. For 471459/471459 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 75697 event pairs, 3199 based on Foata normal form. 1/13018 useless extension candidates. Maximal degree in co-relation 99719. Up to 12773 conditions per place. [2023-08-24 08:51:11,831 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 854 selfloop transitions, 98 changer transitions 1/953 dead transitions. [2023-08-24 08:51:11,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 953 transitions, 18261 flow [2023-08-24 08:51:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:51:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:51:11,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2378 transitions. [2023-08-24 08:51:11,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31105297580117724 [2023-08-24 08:51:11,833 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2378 transitions. [2023-08-24 08:51:11,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2378 transitions. [2023-08-24 08:51:11,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:51:11,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2378 transitions. [2023-08-24 08:51:11,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.1818181818182) internal successors, (2378), 11 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:11,837 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 08:51:11,838 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 08:51:11,838 INFO L175 Difference]: Start difference. First operand has 544 places, 924 transitions, 15743 flow. Second operand 11 states and 2378 transitions. [2023-08-24 08:51:11,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 953 transitions, 18261 flow [2023-08-24 08:51:14,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 953 transitions, 17621 flow, removed 187 selfloop flow, removed 12 redundant places. [2023-08-24 08:51:14,410 INFO L231 Difference]: Finished difference. Result has 544 places, 929 transitions, 15727 flow [2023-08-24 08:51:14,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=15103, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=826, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15727, PETRI_PLACES=544, PETRI_TRANSITIONS=929} [2023-08-24 08:51:14,411 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 512 predicate places. [2023-08-24 08:51:14,411 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 929 transitions, 15727 flow [2023-08-24 08:51:14,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 211.3448275862069) internal successors, (6129), 29 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:14,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:51:14,412 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 08:51:14,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-08-24 08:51:14,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:14,612 INFO L420 AbstractCegarLoop]: === Iteration 79 === 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 08:51:14,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:51:14,613 INFO L85 PathProgramCache]: Analyzing trace with hash 854870889, now seen corresponding path program 72 times [2023-08-24 08:51:14,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:51:14,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983636281] [2023-08-24 08:51:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:51:14,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:51:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:51:15,541 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 08:51:15,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:51:15,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983636281] [2023-08-24 08:51:15,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983636281] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:51:15,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659521583] [2023-08-24 08:51:15,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:51:15,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:15,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:51:15,542 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:51:15,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-08-24 08:51:15,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:51:15,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:51:15,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:51:15,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:51:15,868 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:51:15,869 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 08:51:15,910 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:51:15,910 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 08:51:15,968 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:51:15,968 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 08:51:16,124 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:51:16,124 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 08:51:16,229 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:16,230 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 08:51:16,257 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 08:51:16,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:51:16,359 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:16,359 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 08:51:16,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:16,939 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:16,982 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 08:51:16,982 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 08:51:17,397 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 08:51:17,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659521583] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:51:17,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:51:17,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 27 [2023-08-24 08:51:17,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859583243] [2023-08-24 08:51:17,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:51:17,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:51:17,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:51:17,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:51:17,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:51:17,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 695 [2023-08-24 08:51:17,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 929 transitions, 15727 flow. Second operand has 29 states, 29 states have (on average 194.17241379310346) internal successors, (5631), 29 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:17,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:51:17,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 695 [2023-08-24 08:51:17,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:51:23,630 INFO L124 PetriNetUnfolderBase]: 9174/13413 cut-off events. [2023-08-24 08:51:23,630 INFO L125 PetriNetUnfolderBase]: For 493471/493471 co-relation queries the response was YES. [2023-08-24 08:51:23,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108599 conditions, 13413 events. 9174/13413 cut-off events. For 493471/493471 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 77725 event pairs, 3219 based on Foata normal form. 1/13414 useless extension candidates. Maximal degree in co-relation 108330. Up to 13018 conditions per place. [2023-08-24 08:51:23,952 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 899 selfloop transitions, 194 changer transitions 1/1094 dead transitions. [2023-08-24 08:51:23,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1094 transitions, 23154 flow [2023-08-24 08:51:23,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 08:51:23,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 08:51:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 6126 transitions. [2023-08-24 08:51:23,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2843351125551172 [2023-08-24 08:51:23,957 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 6126 transitions. [2023-08-24 08:51:23,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 6126 transitions. [2023-08-24 08:51:23,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:51:23,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 6126 transitions. [2023-08-24 08:51:23,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 197.61290322580646) internal successors, (6126), 31 states have internal predecessors, (6126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:23,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 695.0) internal successors, (22240), 32 states have internal predecessors, (22240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:23,969 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 695.0) internal successors, (22240), 32 states have internal predecessors, (22240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:23,969 INFO L175 Difference]: Start difference. First operand has 544 places, 929 transitions, 15727 flow. Second operand 31 states and 6126 transitions. [2023-08-24 08:51:23,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1094 transitions, 23154 flow [2023-08-24 08:51:26,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 1094 transitions, 22386 flow, removed 194 selfloop flow, removed 10 redundant places. [2023-08-24 08:51:26,404 INFO L231 Difference]: Finished difference. Result has 566 places, 1023 transitions, 19853 flow [2023-08-24 08:51:26,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=15139, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=19853, PETRI_PLACES=566, PETRI_TRANSITIONS=1023} [2023-08-24 08:51:26,405 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 534 predicate places. [2023-08-24 08:51:26,405 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1023 transitions, 19853 flow [2023-08-24 08:51:26,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 194.17241379310346) internal successors, (5631), 29 states have internal predecessors, (5631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:26,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:51:26,405 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 08:51:26,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-08-24 08:51:26,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2023-08-24 08:51:26,608 INFO L420 AbstractCegarLoop]: === Iteration 80 === 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 08:51:26,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:51:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash 2124100193, now seen corresponding path program 73 times [2023-08-24 08:51:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:51:26,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546337001] [2023-08-24 08:51:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:51:26,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:51:26,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:51:27,094 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 08:51:27,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:51:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546337001] [2023-08-24 08:51:27,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546337001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:51:27,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611329266] [2023-08-24 08:51:27,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:51:27,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:27,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:51:27,096 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:51:27,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-08-24 08:51:27,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:51:27,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:51:27,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:51:27,597 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:27,597 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 08:51:27,608 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 08:51:27,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:51:27,705 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:27,705 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 08:51:27,802 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:51:27,803 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 08:51:27,882 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 08:51:27,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611329266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:51:27,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:51:27,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:51:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263862929] [2023-08-24 08:51:27,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:51:27,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:51:27,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:51:27,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:51:27,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:51:27,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:51:27,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1023 transitions, 19853 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 08:51:27,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:51:27,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:51:27,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:51:32,427 INFO L124 PetriNetUnfolderBase]: 9264/13546 cut-off events. [2023-08-24 08:51:32,428 INFO L125 PetriNetUnfolderBase]: For 510047/510047 co-relation queries the response was YES. [2023-08-24 08:51:32,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109456 conditions, 13546 events. 9264/13546 cut-off events. For 510047/510047 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 78977 event pairs, 3257 based on Foata normal form. 1/13547 useless extension candidates. Maximal degree in co-relation 109187. Up to 13137 conditions per place. [2023-08-24 08:51:32,645 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 878 selfloop transitions, 178 changer transitions 1/1057 dead transitions. [2023-08-24 08:51:32,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1057 transitions, 22620 flow [2023-08-24 08:51:32,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:51:32,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:51:32,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2225 transitions. [2023-08-24 08:51:32,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35571542765787373 [2023-08-24 08:51:32,647 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2225 transitions. [2023-08-24 08:51:32,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2225 transitions. [2023-08-24 08:51:32,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:51:32,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2225 transitions. [2023-08-24 08:51:32,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.22222222222223) internal successors, (2225), 9 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:32,650 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 08:51:32,651 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 08:51:32,651 INFO L175 Difference]: Start difference. First operand has 566 places, 1023 transitions, 19853 flow. Second operand 9 states and 2225 transitions. [2023-08-24 08:51:32,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1057 transitions, 22620 flow [2023-08-24 08:51:35,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1057 transitions, 21779 flow, removed 198 selfloop flow, removed 19 redundant places. [2023-08-24 08:51:35,770 INFO L231 Difference]: Finished difference. Result has 557 places, 1029 transitions, 19815 flow [2023-08-24 08:51:35,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=19012, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=845, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19815, PETRI_PLACES=557, PETRI_TRANSITIONS=1029} [2023-08-24 08:51:35,770 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 525 predicate places. [2023-08-24 08:51:35,771 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1029 transitions, 19815 flow [2023-08-24 08:51:35,771 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 08:51:35,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:51:35,771 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 08:51:35,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-08-24 08:51:35,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-08-24 08:51:35,972 INFO L420 AbstractCegarLoop]: === Iteration 81 === 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 08:51:35,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:51:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1504716315, now seen corresponding path program 74 times [2023-08-24 08:51:35,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:51:35,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825122407] [2023-08-24 08:51:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:51:35,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:51:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:51:36,639 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 08:51:36,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:51:36,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825122407] [2023-08-24 08:51:36,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825122407] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:51:36,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031582584] [2023-08-24 08:51:36,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:51:36,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:36,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:51:36,640 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:51:36,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-08-24 08:51:36,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:51:36,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:51:36,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:51:36,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:51:36,991 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 08:51:37,032 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:51:37,033 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 08:51:37,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:37,252 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 08:51:37,353 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:51:37,354 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 08:51:37,508 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:37,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 94 [2023-08-24 08:51:37,550 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 08:51:37,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:51:38,486 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_5332 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5332))) (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))) (<= (+ .cse0 c_~csum~0 .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_5332 (Array Int Int))) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5332))) (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) (+ .cse5 c_~csum~0 .cse6))))))) is different from false [2023-08-24 08:51:38,516 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:38,517 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 2034 treesize of output 1796 [2023-08-24 08:51:38,544 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:38,544 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 08:51:44,075 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,075 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 97 [2023-08-24 08:51:44,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,083 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 89 treesize of output 71 [2023-08-24 08:51:44,123 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,125 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,133 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 103 treesize of output 75 [2023-08-24 08:51:44,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,142 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 79 treesize of output 71 [2023-08-24 08:51:44,179 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,180 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 08:51:44,189 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,200 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:51:44,201 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 400 treesize of output 1 [2023-08-24 08:51:44,206 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,211 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,217 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,221 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,224 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 08:51:44,243 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,247 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,253 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,257 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,260 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,271 INFO L322 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2023-08-24 08:51:44,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 400 treesize of output 1 [2023-08-24 08:51:44,278 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,282 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,290 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,293 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,296 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,300 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:44,304 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 08:51:44,308 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,359 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:44,377 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,377 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 120 treesize of output 116 [2023-08-24 08:51:44,499 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:44,505 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:44,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,523 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 153 treesize of output 135 [2023-08-24 08:51:44,691 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,691 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 26 treesize of output 27 [2023-08-24 08:51:44,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,702 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 18 treesize of output 19 [2023-08-24 08:51:44,722 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,722 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 08:51:44,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,740 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 24 treesize of output 25 [2023-08-24 08:51:44,744 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 16 treesize of output 10 [2023-08-24 08:51:44,776 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,776 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 63 [2023-08-24 08:51:44,886 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 08:51:44,906 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:44,917 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:44,918 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 403 treesize of output 255 [2023-08-24 08:51:45,109 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:45,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,120 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:45,120 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 153 treesize of output 111 [2023-08-24 08:51:45,157 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,169 INFO L322 Elim1Store]: treesize reduction 5, result has 68.8 percent of original size [2023-08-24 08:51:45,170 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 117 treesize of output 80 [2023-08-24 08:51:45,194 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 08:51:45,205 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,209 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,214 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,219 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,224 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 08:51:45,231 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 52 [2023-08-24 08:51:45,253 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,259 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,263 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,357 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:45,357 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 08:51:45,472 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,509 INFO L322 Elim1Store]: treesize reduction 32, result has 50.8 percent of original size [2023-08-24 08:51:45,510 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 112 treesize of output 96 [2023-08-24 08:51:45,556 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,580 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:45,580 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 127 treesize of output 105 [2023-08-24 08:51:45,690 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:45,691 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 08:51:45,709 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,714 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 08:51:45,725 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,738 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,744 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,763 INFO L322 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-24 08:51:45,763 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 405 treesize of output 1 [2023-08-24 08:51:45,812 INFO L322 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2023-08-24 08:51:45,813 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 334 treesize of output 242 [2023-08-24 08:51:45,929 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:51:45,934 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 08:51:45,955 INFO L322 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2023-08-24 08:51:45,955 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 08:51:45,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,960 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 08:51:45,979 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:51:45,979 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 08:51:45,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:45,987 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 08:51:46,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:51:46,008 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 08:51:46,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:46,119 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:46,166 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:51:46,167 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 08:51:46,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:46,180 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 08:51:46,529 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 08:51:46,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031582584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:51:46,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:51:46,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 08:51:46,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616708368] [2023-08-24 08:51:46,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:51:46,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:51:46,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:51:46,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:51:46,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=860, Unknown=1, NotChecked=60, Total=1056 [2023-08-24 08:51:46,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 222 out of 695 [2023-08-24 08:51:46,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1029 transitions, 19815 flow. Second operand has 33 states, 33 states have (on average 224.24242424242425) internal successors, (7400), 33 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:46,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:51:46,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 222 of 695 [2023-08-24 08:51:46,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:51:51,635 INFO L124 PetriNetUnfolderBase]: 9324/13635 cut-off events. [2023-08-24 08:51:51,635 INFO L125 PetriNetUnfolderBase]: For 518503/518503 co-relation queries the response was YES. [2023-08-24 08:51:51,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110061 conditions, 13635 events. 9324/13635 cut-off events. For 518503/518503 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 79367 event pairs, 3219 based on Foata normal form. 1/13636 useless extension candidates. Maximal degree in co-relation 109794. Up to 13028 conditions per place. [2023-08-24 08:51:51,866 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 867 selfloop transitions, 208 changer transitions 1/1076 dead transitions. [2023-08-24 08:51:51,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 1076 transitions, 22828 flow [2023-08-24 08:51:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:51:51,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:51:51,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2755 transitions. [2023-08-24 08:51:51,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3303357314148681 [2023-08-24 08:51:51,868 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2755 transitions. [2023-08-24 08:51:51,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2755 transitions. [2023-08-24 08:51:51,868 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:51:51,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2755 transitions. [2023-08-24 08:51:51,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 229.58333333333334) internal successors, (2755), 12 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:51,873 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 08:51:51,873 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 08:51:51,873 INFO L175 Difference]: Start difference. First operand has 557 places, 1029 transitions, 19815 flow. Second operand 12 states and 2755 transitions. [2023-08-24 08:51:51,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 1076 transitions, 22828 flow [2023-08-24 08:51:54,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1076 transitions, 22096 flow, removed 192 selfloop flow, removed 6 redundant places. [2023-08-24 08:51:54,566 INFO L231 Difference]: Finished difference. Result has 566 places, 1040 transitions, 20132 flow [2023-08-24 08:51:54,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=19083, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1029, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20132, PETRI_PLACES=566, PETRI_TRANSITIONS=1040} [2023-08-24 08:51:54,566 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 534 predicate places. [2023-08-24 08:51:54,566 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1040 transitions, 20132 flow [2023-08-24 08:51:54,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 224.24242424242425) internal successors, (7400), 33 states have internal predecessors, (7400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:51:54,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:51:54,567 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 08:51:54,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-08-24 08:51:54,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:54,773 INFO L420 AbstractCegarLoop]: === Iteration 82 === 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 08:51:54,773 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:51:54,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1866837091, now seen corresponding path program 75 times [2023-08-24 08:51:54,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:51:54,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820230444] [2023-08-24 08:51:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:51:54,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:51:54,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:51:55,625 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 08:51:55,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:51:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820230444] [2023-08-24 08:51:55,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820230444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:51:55,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961734782] [2023-08-24 08:51:55,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:51:55,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:51:55,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:51:55,626 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:51:55,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-08-24 08:51:55,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:51:55,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:51:55,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:51:55,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:51:55,961 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:51:55,961 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 08:51:56,003 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:51:56,003 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 08:51:56,057 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:51:56,057 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 08:51:56,238 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 08:51:56,457 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 08:51:56,483 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 08:51:56,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:51:56,638 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:51:56,638 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 155 treesize of output 175 [2023-08-24 08:51:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:57,008 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:51:57,249 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 08:51:57,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961734782] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:51:57,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:51:57,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2023-08-24 08:51:57,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836603106] [2023-08-24 08:51:57,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:51:57,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:51:57,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:51:57,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:51:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:51:57,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:51:57,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1040 transitions, 20132 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 08:51:57,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:51:57,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:51:57,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:52:02,495 INFO L124 PetriNetUnfolderBase]: 9474/13850 cut-off events. [2023-08-24 08:52:02,495 INFO L125 PetriNetUnfolderBase]: For 554159/554159 co-relation queries the response was YES. [2023-08-24 08:52:02,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112931 conditions, 13850 events. 9474/13850 cut-off events. For 554159/554159 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 80665 event pairs, 3029 based on Foata normal form. 1/13851 useless extension candidates. Maximal degree in co-relation 112658. Up to 13291 conditions per place. [2023-08-24 08:52:02,724 INFO L140 encePairwiseOnDemand]: 682/695 looper letters, 882 selfloop transitions, 201 changer transitions 1/1084 dead transitions. [2023-08-24 08:52:02,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1084 transitions, 23571 flow [2023-08-24 08:52:02,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:52:02,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 08:52:02,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2897 transitions. [2023-08-24 08:52:02,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29773895169578624 [2023-08-24 08:52:02,727 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2897 transitions. [2023-08-24 08:52:02,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2897 transitions. [2023-08-24 08:52:02,727 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:52:02,727 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2897 transitions. [2023-08-24 08:52:02,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 206.92857142857142) internal successors, (2897), 14 states have internal predecessors, (2897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:02,732 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 08:52:02,733 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 08:52:02,733 INFO L175 Difference]: Start difference. First operand has 566 places, 1040 transitions, 20132 flow. Second operand 14 states and 2897 transitions. [2023-08-24 08:52:02,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1084 transitions, 23571 flow [2023-08-24 08:52:05,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 1084 transitions, 22772 flow, removed 217 selfloop flow, removed 8 redundant places. [2023-08-24 08:52:05,755 INFO L231 Difference]: Finished difference. Result has 574 places, 1059 transitions, 20912 flow [2023-08-24 08:52:05,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=19345, PETRI_DIFFERENCE_MINUEND_PLACES=558, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=849, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=20912, PETRI_PLACES=574, PETRI_TRANSITIONS=1059} [2023-08-24 08:52:05,756 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 542 predicate places. [2023-08-24 08:52:05,756 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 1059 transitions, 20912 flow [2023-08-24 08:52:05,756 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 08:52:05,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:52:05,757 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 08:52:05,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-08-24 08:52:05,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:05,957 INFO L420 AbstractCegarLoop]: === Iteration 83 === 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 08:52:05,957 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:52:05,957 INFO L85 PathProgramCache]: Analyzing trace with hash -872063375, now seen corresponding path program 76 times [2023-08-24 08:52:05,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:52:05,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933528702] [2023-08-24 08:52:05,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:52:05,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:52:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:52:06,510 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 08:52:06,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:52:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933528702] [2023-08-24 08:52:06,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933528702] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:52:06,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127128718] [2023-08-24 08:52:06,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:52:06,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:06,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:52:06,511 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:52:06,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-08-24 08:52:06,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:52:06,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:52:06,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:52:06,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:52:06,882 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:52:06,882 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 08:52:06,914 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:52:06,914 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 08:52:06,966 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:52:06,966 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 08:52:07,081 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:52:07,081 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 08:52:07,272 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:07,273 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 08:52:07,289 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 08:52:07,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:52:07,421 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:07,422 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 155 treesize of output 175 [2023-08-24 08:52:07,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:07,768 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:07,981 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 08:52:07,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127128718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:52:07,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:52:07,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-08-24 08:52:07,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503641877] [2023-08-24 08:52:07,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:52:07,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:52:07,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:52:07,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:52:07,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2023-08-24 08:52:07,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:52:07,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1059 transitions, 20912 flow. Second operand has 26 states, 26 states have (on average 211.26923076923077) internal successors, (5493), 26 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:07,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:52:07,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:52:07,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:52:13,595 INFO L124 PetriNetUnfolderBase]: 9648/14101 cut-off events. [2023-08-24 08:52:13,595 INFO L125 PetriNetUnfolderBase]: For 594893/594893 co-relation queries the response was YES. [2023-08-24 08:52:13,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116303 conditions, 14101 events. 9648/14101 cut-off events. For 594893/594893 co-relation queries the response was YES. Maximal size of possible extension queue 753. Compared 82630 event pairs, 3065 based on Foata normal form. 1/14102 useless extension candidates. Maximal degree in co-relation 116028. Up to 13434 conditions per place. [2023-08-24 08:52:13,843 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 894 selfloop transitions, 213 changer transitions 1/1108 dead transitions. [2023-08-24 08:52:13,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 585 places, 1108 transitions, 24502 flow [2023-08-24 08:52:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:52:13,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:52:13,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2595 transitions. [2023-08-24 08:52:13,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31115107913669066 [2023-08-24 08:52:13,846 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2595 transitions. [2023-08-24 08:52:13,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2595 transitions. [2023-08-24 08:52:13,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:52:13,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2595 transitions. [2023-08-24 08:52:13,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 216.25) internal successors, (2595), 12 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:13,852 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 08:52:13,852 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 08:52:13,852 INFO L175 Difference]: Start difference. First operand has 574 places, 1059 transitions, 20912 flow. Second operand 12 states and 2595 transitions. [2023-08-24 08:52:13,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 585 places, 1108 transitions, 24502 flow [2023-08-24 08:52:17,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 578 places, 1108 transitions, 23210 flow, removed 555 selfloop flow, removed 7 redundant places. [2023-08-24 08:52:17,535 INFO L231 Difference]: Finished difference. Result has 582 places, 1078 transitions, 21302 flow [2023-08-24 08:52:17,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=19818, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=856, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21302, PETRI_PLACES=582, PETRI_TRANSITIONS=1078} [2023-08-24 08:52:17,536 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 550 predicate places. [2023-08-24 08:52:17,536 INFO L495 AbstractCegarLoop]: Abstraction has has 582 places, 1078 transitions, 21302 flow [2023-08-24 08:52:17,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 211.26923076923077) internal successors, (5493), 26 states have internal predecessors, (5493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:17,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:52:17,537 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 08:52:17,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2023-08-24 08:52:17,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2023-08-24 08:52:17,737 INFO L420 AbstractCegarLoop]: === Iteration 84 === 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 08:52:17,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:52:17,737 INFO L85 PathProgramCache]: Analyzing trace with hash 452740901, now seen corresponding path program 77 times [2023-08-24 08:52:17,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:52:17,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661235748] [2023-08-24 08:52:17,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:52:17,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:52:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:52:18,354 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 08:52:18,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:52:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661235748] [2023-08-24 08:52:18,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661235748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:52:18,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403497069] [2023-08-24 08:52:18,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:52:18,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:18,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:52:18,355 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:52:18,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-08-24 08:52:18,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:52:18,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:52:18,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-24 08:52:18,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:52:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:52:18,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:52:18,963 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:52:18,963 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 08:52:19,034 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:19,034 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 08:52:19,057 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 08:52:19,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:52:19,131 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_5541 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5541))) (+ (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_5541 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5541))) (+ (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 08:52:19,142 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (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_5541 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5541))) (+ (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_5541 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5541))) (+ (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 08:52:19,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:19,176 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 08:52:19,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:19,185 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 08:52:19,521 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:19,522 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:19,563 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:52:19,563 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 08:52:19,831 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 08:52:19,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403497069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:52:19,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:52:19,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2023-08-24 08:52:19,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257116183] [2023-08-24 08:52:19,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:52:19,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:52:19,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:52:19,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:52:19,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=641, Unknown=2, NotChecked=106, Total=870 [2023-08-24 08:52:19,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 08:52:19,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 582 places, 1078 transitions, 21302 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 08:52:19,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:52:19,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 08:52:19,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:52:25,302 INFO L124 PetriNetUnfolderBase]: 9830/14368 cut-off events. [2023-08-24 08:52:25,302 INFO L125 PetriNetUnfolderBase]: For 684516/684516 co-relation queries the response was YES. [2023-08-24 08:52:25,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120449 conditions, 14368 events. 9830/14368 cut-off events. For 684516/684516 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 84730 event pairs, 3314 based on Foata normal form. 1/14369 useless extension candidates. Maximal degree in co-relation 120170. Up to 13575 conditions per place. [2023-08-24 08:52:25,551 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 922 selfloop transitions, 207 changer transitions 1/1130 dead transitions. [2023-08-24 08:52:25,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1130 transitions, 25129 flow [2023-08-24 08:52:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:52:25,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:52:25,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2149 transitions. [2023-08-24 08:52:25,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3435651478816946 [2023-08-24 08:52:25,553 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2149 transitions. [2023-08-24 08:52:25,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2149 transitions. [2023-08-24 08:52:25,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:52:25,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2149 transitions. [2023-08-24 08:52:25,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.77777777777777) internal successors, (2149), 9 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:25,557 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 08:52:25,557 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 08:52:25,557 INFO L175 Difference]: Start difference. First operand has 582 places, 1078 transitions, 21302 flow. Second operand 9 states and 2149 transitions. [2023-08-24 08:52:25,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1130 transitions, 25129 flow [2023-08-24 08:52:29,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 586 places, 1130 transitions, 24195 flow, removed 399 selfloop flow, removed 4 redundant places. [2023-08-24 08:52:29,744 INFO L231 Difference]: Finished difference. Result has 589 places, 1091 transitions, 22072 flow [2023-08-24 08:52:29,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=20368, PETRI_DIFFERENCE_MINUEND_PLACES=578, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1078, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=878, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=22072, PETRI_PLACES=589, PETRI_TRANSITIONS=1091} [2023-08-24 08:52:29,745 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 557 predicate places. [2023-08-24 08:52:29,745 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1091 transitions, 22072 flow [2023-08-24 08:52:29,746 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 08:52:29,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:52:29,746 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 08:52:29,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2023-08-24 08:52:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:29,949 INFO L420 AbstractCegarLoop]: === Iteration 85 === 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 08:52:29,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:52:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -288917317, now seen corresponding path program 78 times [2023-08-24 08:52:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:52:29,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233946960] [2023-08-24 08:52:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:52:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:52:29,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:52:30,438 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 08:52:30,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:52:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233946960] [2023-08-24 08:52:30,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233946960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:52:30,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851295767] [2023-08-24 08:52:30,439 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:52:30,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:30,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:52:30,440 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:52:30,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-08-24 08:52:30,749 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:52:30,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:52:30,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 08:52:30,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:52:30,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:52:30,977 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 08:52:31,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:31,082 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 08:52:31,104 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 08:52:31,104 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:52:31,225 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_5608 (Array Int Int)) (~A~0.base Int)) (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5608))) (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) (+ (select .cse0 .cse2) c_~asum~0 c_~bsum~0))))) (forall ((v_ArrVal_5608 (Array Int Int)) (~A~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5608))) (let ((.cse3 (select .cse4 ~A~0.base))) (<= (+ (select .cse3 .cse2) c_~asum~0 c_~bsum~0) (+ (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 08:52:31,298 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:31,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 166 [2023-08-24 08:52:31,316 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:31,316 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 08:52:31,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:31,715 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 08:52:31,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851295767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:52:31,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:52:31,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-24 08:52:31,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384045065] [2023-08-24 08:52:31,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:52:31,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 08:52:31,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:52:31,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 08:52:31,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=592, Unknown=1, NotChecked=50, Total=756 [2023-08-24 08:52:31,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 08:52:31,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1091 transitions, 22072 flow. Second operand has 28 states, 28 states have (on average 230.21428571428572) internal successors, (6446), 28 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:31,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:52:31,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 08:52:31,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:52:37,109 INFO L124 PetriNetUnfolderBase]: 9890/14457 cut-off events. [2023-08-24 08:52:37,109 INFO L125 PetriNetUnfolderBase]: For 653487/653487 co-relation queries the response was YES. [2023-08-24 08:52:37,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120414 conditions, 14457 events. 9890/14457 cut-off events. For 653487/653487 co-relation queries the response was YES. Maximal size of possible extension queue 770. Compared 84993 event pairs, 3449 based on Foata normal form. 1/14458 useless extension candidates. Maximal degree in co-relation 120133. Up to 13882 conditions per place. [2023-08-24 08:52:37,363 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 936 selfloop transitions, 194 changer transitions 1/1131 dead transitions. [2023-08-24 08:52:37,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1131 transitions, 25513 flow [2023-08-24 08:52:37,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:52:37,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:52:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2141 transitions. [2023-08-24 08:52:37,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34228617106314946 [2023-08-24 08:52:37,365 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2141 transitions. [2023-08-24 08:52:37,365 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2141 transitions. [2023-08-24 08:52:37,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:52:37,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2141 transitions. [2023-08-24 08:52:37,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.88888888888889) internal successors, (2141), 9 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:37,369 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 08:52:37,369 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 08:52:37,369 INFO L175 Difference]: Start difference. First operand has 589 places, 1091 transitions, 22072 flow. Second operand 9 states and 2141 transitions. [2023-08-24 08:52:37,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1131 transitions, 25513 flow [2023-08-24 08:52:41,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 594 places, 1131 transitions, 23812 flow, removed 756 selfloop flow, removed 3 redundant places. [2023-08-24 08:52:41,447 INFO L231 Difference]: Finished difference. Result has 597 places, 1099 transitions, 21721 flow [2023-08-24 08:52:41,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=20767, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1091, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=899, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21721, PETRI_PLACES=597, PETRI_TRANSITIONS=1099} [2023-08-24 08:52:41,448 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 565 predicate places. [2023-08-24 08:52:41,448 INFO L495 AbstractCegarLoop]: Abstraction has has 597 places, 1099 transitions, 21721 flow [2023-08-24 08:52:41,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 230.21428571428572) internal successors, (6446), 28 states have internal predecessors, (6446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:41,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:52:41,449 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 08:52:41,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2023-08-24 08:52:41,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:41,649 INFO L420 AbstractCegarLoop]: === Iteration 86 === 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 08:52:41,649 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:52:41,649 INFO L85 PathProgramCache]: Analyzing trace with hash -445133467, now seen corresponding path program 79 times [2023-08-24 08:52:41,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:52:41,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163094666] [2023-08-24 08:52:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:52:41,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:52:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:52:42,262 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 08:52:42,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:52:42,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163094666] [2023-08-24 08:52:42,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163094666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:52:42,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956223241] [2023-08-24 08:52:42,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:52:42,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:42,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:52:42,264 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:52:42,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-08-24 08:52:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:52:42,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:52:42,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:52:42,598 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:52:42,598 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 08:52:42,626 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:52:42,626 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 08:52:42,677 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:52:42,677 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 08:52:42,883 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 08:52:43,035 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 08:52:43,056 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 08:52:43,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:52:43,168 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:43,169 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 08:52:43,891 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:43,891 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:43,934 INFO L322 Elim1Store]: treesize reduction 26, result has 66.2 percent of original size [2023-08-24 08:52:43,934 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 08:52:44,289 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 08:52:44,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956223241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:52:44,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:52:44,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:52:44,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999021909] [2023-08-24 08:52:44,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:52:44,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:52:44,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:52:44,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:52:44,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:52:44,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 224 out of 695 [2023-08-24 08:52:44,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 597 places, 1099 transitions, 21721 flow. Second operand has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:44,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:52:44,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 224 of 695 [2023-08-24 08:52:44,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:52:49,723 INFO L124 PetriNetUnfolderBase]: 10034/14666 cut-off events. [2023-08-24 08:52:49,723 INFO L125 PetriNetUnfolderBase]: For 614607/614607 co-relation queries the response was YES. [2023-08-24 08:52:49,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120894 conditions, 14666 events. 10034/14666 cut-off events. For 614607/614607 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 86287 event pairs, 3574 based on Foata normal form. 1/14667 useless extension candidates. Maximal degree in co-relation 120609. Up to 14143 conditions per place. [2023-08-24 08:52:49,977 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 954 selfloop transitions, 188 changer transitions 1/1143 dead transitions. [2023-08-24 08:52:49,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 608 places, 1143 transitions, 25171 flow [2023-08-24 08:52:49,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:52:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:52:49,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2773 transitions. [2023-08-24 08:52:49,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3324940047961631 [2023-08-24 08:52:49,979 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2773 transitions. [2023-08-24 08:52:49,979 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2773 transitions. [2023-08-24 08:52:49,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:52:49,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2773 transitions. [2023-08-24 08:52:49,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 231.08333333333334) internal successors, (2773), 12 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:49,984 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 08:52:49,984 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 08:52:49,984 INFO L175 Difference]: Start difference. First operand has 597 places, 1099 transitions, 21721 flow. Second operand 12 states and 2773 transitions. [2023-08-24 08:52:49,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 608 places, 1143 transitions, 25171 flow [2023-08-24 08:52:52,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 603 places, 1143 transitions, 24363 flow, removed 220 selfloop flow, removed 5 redundant places. [2023-08-24 08:52:52,962 INFO L231 Difference]: Finished difference. Result has 607 places, 1114 transitions, 22301 flow [2023-08-24 08:52:52,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=20923, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1099, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=913, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22301, PETRI_PLACES=607, PETRI_TRANSITIONS=1114} [2023-08-24 08:52:52,963 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 575 predicate places. [2023-08-24 08:52:52,963 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 1114 transitions, 22301 flow [2023-08-24 08:52:52,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 226.3448275862069) internal successors, (6564), 29 states have internal predecessors, (6564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:52,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:52:52,964 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 08:52:52,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2023-08-24 08:52:53,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2023-08-24 08:52:53,169 INFO L420 AbstractCegarLoop]: === Iteration 87 === 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 08:52:53,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:52:53,169 INFO L85 PathProgramCache]: Analyzing trace with hash -576044263, now seen corresponding path program 80 times [2023-08-24 08:52:53,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:52:53,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910661698] [2023-08-24 08:52:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:52:53,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:52:53,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:52:53,818 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 08:52:53,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:52:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910661698] [2023-08-24 08:52:53,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910661698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:52:53,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465258769] [2023-08-24 08:52:53,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:52:53,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:52:53,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:52:53,820 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:52:53,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-08-24 08:52:54,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:52:54,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:52:54,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 86 conjunts are in the unsatisfiable core [2023-08-24 08:52:54,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:52:54,155 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 08:52:54,192 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:52:54,193 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 08:52:54,407 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:52:54,408 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 08:52:54,554 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:54,554 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 76 treesize of output 96 [2023-08-24 08:52:54,630 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 08:52:54,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:52:56,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:52:56,014 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 08:52:56,130 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:52:56,311 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 08:52:56,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465258769] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:52:56,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:52:56,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 28 [2023-08-24 08:52:56,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263142855] [2023-08-24 08:52:56,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:52:56,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:52:56,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:52:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:52:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2023-08-24 08:52:56,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 695 [2023-08-24 08:52:56,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 1114 transitions, 22301 flow. Second operand has 30 states, 30 states have (on average 194.26666666666668) internal successors, (5828), 30 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:52:56,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:52:56,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 695 [2023-08-24 08:52:56,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:53:02,259 INFO L124 PetriNetUnfolderBase]: 10178/14875 cut-off events. [2023-08-24 08:53:02,259 INFO L125 PetriNetUnfolderBase]: For 664027/664027 co-relation queries the response was YES. [2023-08-24 08:53:02,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123899 conditions, 14875 events. 10178/14875 cut-off events. For 664027/664027 co-relation queries the response was YES. Maximal size of possible extension queue 793. Compared 87998 event pairs, 3628 based on Foata normal form. 1/14876 useless extension candidates. Maximal degree in co-relation 123608. Up to 14313 conditions per place. [2023-08-24 08:53:02,521 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 963 selfloop transitions, 203 changer transitions 1/1167 dead transitions. [2023-08-24 08:53:02,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 1167 transitions, 25822 flow [2023-08-24 08:53:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 08:53:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 08:53:02,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3574 transitions. [2023-08-24 08:53:02,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28569144684252595 [2023-08-24 08:53:02,524 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3574 transitions. [2023-08-24 08:53:02,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3574 transitions. [2023-08-24 08:53:02,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:53:02,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3574 transitions. [2023-08-24 08:53:02,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 198.55555555555554) internal successors, (3574), 18 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:02,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 695.0) internal successors, (13205), 19 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:02,531 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 695.0) internal successors, (13205), 19 states have internal predecessors, (13205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:02,531 INFO L175 Difference]: Start difference. First operand has 607 places, 1114 transitions, 22301 flow. Second operand 18 states and 3574 transitions. [2023-08-24 08:53:02,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 1167 transitions, 25822 flow [2023-08-24 08:53:06,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 615 places, 1167 transitions, 24685 flow, removed 402 selfloop flow, removed 9 redundant places. [2023-08-24 08:53:06,247 INFO L231 Difference]: Finished difference. Result has 618 places, 1125 transitions, 22476 flow [2023-08-24 08:53:06,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=21167, PETRI_DIFFERENCE_MINUEND_PLACES=598, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=914, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22476, PETRI_PLACES=618, PETRI_TRANSITIONS=1125} [2023-08-24 08:53:06,248 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 586 predicate places. [2023-08-24 08:53:06,248 INFO L495 AbstractCegarLoop]: Abstraction has has 618 places, 1125 transitions, 22476 flow [2023-08-24 08:53:06,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 194.26666666666668) internal successors, (5828), 30 states have internal predecessors, (5828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:06,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:53:06,249 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 08:53:06,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2023-08-24 08:53:06,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:06,454 INFO L420 AbstractCegarLoop]: === Iteration 88 === 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 08:53:06,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:53:06,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1096560595, now seen corresponding path program 81 times [2023-08-24 08:53:06,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:53:06,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924566668] [2023-08-24 08:53:06,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:53:06,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:53:06,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:53:07,137 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 08:53:07,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:53:07,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924566668] [2023-08-24 08:53:07,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924566668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:53:07,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410686807] [2023-08-24 08:53:07,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:53:07,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:07,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:53:07,138 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:53:07,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-08-24 08:53:07,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:53:07,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:53:07,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:53:07,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:53:07,508 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:53:07,508 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 08:53:07,537 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:53:07,537 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 08:53:07,594 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:53:07,595 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 08:53:07,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:07,925 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 08:53:08,003 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:53:08,004 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 08:53:08,105 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:08,105 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 08:53:08,162 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 08:53:08,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:53:10,879 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork2_~i~0#1| 4)))) (and (forall ((v_ArrVal_5818 (Array Int Int)) (~C~0.offset Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5818))) (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 ((v_ArrVal_5818 (Array Int Int)) (~C~0.offset Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5818))) (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 08:53:10,908 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:10,909 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 1674 treesize of output 1472 [2023-08-24 08:53:10,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:10,934 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 08:53:13,843 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:18,550 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:18,571 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:18,571 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 152 treesize of output 146 [2023-08-24 08:53:18,855 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:18,877 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:18,877 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 166 treesize of output 154 [2023-08-24 08:53:19,238 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:19,238 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 08:53:19,268 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,287 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:19,287 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 153 treesize of output 135 [2023-08-24 08:53:19,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,407 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:19,407 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 114 treesize of output 104 [2023-08-24 08:53:19,499 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 08:53:19,530 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,557 INFO L322 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2023-08-24 08:53:19,557 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 430 treesize of output 296 [2023-08-24 08:53:19,647 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,647 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,648 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,649 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 40 [2023-08-24 08:53:19,668 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,669 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,671 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 179 [2023-08-24 08:53:19,710 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:19,715 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,731 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,732 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,734 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 569 treesize of output 316 [2023-08-24 08:53:19,763 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 08:53:19,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,771 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,798 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:19,799 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 107 treesize of output 87 [2023-08-24 08:53:19,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,861 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,861 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,863 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 65 [2023-08-24 08:53:19,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,884 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:19,886 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 153 treesize of output 89 [2023-08-24 08:53:19,912 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,922 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:19,923 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 08:53:19,940 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:19,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:19,962 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 08:53:20,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,122 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:20,122 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 166 treesize of output 132 [2023-08-24 08:53:20,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,284 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-24 08:53:20,284 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 152 treesize of output 1 [2023-08-24 08:53:20,297 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 08:53:20,301 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 08:53:20,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,327 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:20,327 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 08:53:20,367 INFO L322 Elim1Store]: treesize reduction 28, result has 56.9 percent of original size [2023-08-24 08:53:20,368 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 08:53:20,413 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:20,414 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 08:53:20,598 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,599 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 411 treesize of output 341 [2023-08-24 08:53:20,610 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:53:20,611 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 360 treesize of output 1 [2023-08-24 08:53:20,620 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,624 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,636 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,639 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,663 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 08:53:20,685 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,688 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,766 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 08:53:20,778 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,800 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,802 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 351 treesize of output 182 [2023-08-24 08:53:20,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,826 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,828 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 52 [2023-08-24 08:53:20,852 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,852 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,858 INFO L322 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-08-24 08:53:20,859 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 430 treesize of output 1 [2023-08-24 08:53:20,875 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:20,875 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 08:53:20,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:20,887 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 08:53:21,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,051 INFO L322 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-24 08:53:21,051 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 112 treesize of output 1 [2023-08-24 08:53:21,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,062 INFO L322 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2023-08-24 08:53:21,062 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 357 treesize of output 1 [2023-08-24 08:53:21,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,084 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 08:53:21,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,100 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-24 08:53:21,101 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 428 treesize of output 1 [2023-08-24 08:53:21,106 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,114 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 26 treesize of output 16 [2023-08-24 08:53:21,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,118 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 08:53:21,134 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,141 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 08:53:21,175 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,179 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,194 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,198 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:21,207 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 08:53:21,217 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,227 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:53:21,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:21,276 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:21,319 INFO L322 Elim1Store]: treesize reduction 30, result has 61.0 percent of original size [2023-08-24 08:53:21,320 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 08:53:21,331 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:21,331 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 08:53:21,787 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 08:53:21,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410686807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:53:21,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:53:21,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-24 08:53:21,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388337723] [2023-08-24 08:53:21,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:53:21,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 08:53:21,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:53:21,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 08:53:21,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=699, Unknown=1, NotChecked=54, Total=870 [2023-08-24 08:53:21,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 695 [2023-08-24 08:53:21,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 618 places, 1125 transitions, 22476 flow. Second operand has 30 states, 30 states have (on average 223.1) internal successors, (6693), 30 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:21,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:53:21,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 695 [2023-08-24 08:53:21,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:53:27,816 INFO L124 PetriNetUnfolderBase]: 10258/14992 cut-off events. [2023-08-24 08:53:27,816 INFO L125 PetriNetUnfolderBase]: For 651603/651603 co-relation queries the response was YES. [2023-08-24 08:53:28,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124151 conditions, 14992 events. 10258/14992 cut-off events. For 651603/651603 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 88804 event pairs, 3657 based on Foata normal form. 1/14993 useless extension candidates. Maximal degree in co-relation 123854. Up to 14445 conditions per place. [2023-08-24 08:53:28,237 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 956 selfloop transitions, 202 changer transitions 1/1159 dead transitions. [2023-08-24 08:53:28,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 629 places, 1159 transitions, 25774 flow [2023-08-24 08:53:28,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:53:28,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:53:28,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2737 transitions. [2023-08-24 08:53:28,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3281774580335731 [2023-08-24 08:53:28,240 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2737 transitions. [2023-08-24 08:53:28,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2737 transitions. [2023-08-24 08:53:28,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:53:28,240 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2737 transitions. [2023-08-24 08:53:28,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 228.08333333333334) internal successors, (2737), 12 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:28,244 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 08:53:28,245 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 08:53:28,245 INFO L175 Difference]: Start difference. First operand has 618 places, 1125 transitions, 22476 flow. Second operand 12 states and 2737 transitions. [2023-08-24 08:53:28,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 629 places, 1159 transitions, 25774 flow [2023-08-24 08:53:32,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 619 places, 1159 transitions, 24748 flow, removed 390 selfloop flow, removed 10 redundant places. [2023-08-24 08:53:32,197 INFO L231 Difference]: Finished difference. Result has 621 places, 1131 transitions, 22606 flow [2023-08-24 08:53:32,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=21450, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=925, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=22606, PETRI_PLACES=621, PETRI_TRANSITIONS=1131} [2023-08-24 08:53:32,198 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 589 predicate places. [2023-08-24 08:53:32,198 INFO L495 AbstractCegarLoop]: Abstraction has has 621 places, 1131 transitions, 22606 flow [2023-08-24 08:53:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 223.1) internal successors, (6693), 30 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:32,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:53:32,199 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 08:53:32,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-08-24 08:53:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:32,399 INFO L420 AbstractCegarLoop]: === Iteration 89 === 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 08:53:32,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:53:32,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1275066079, now seen corresponding path program 82 times [2023-08-24 08:53:32,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:53:32,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765209595] [2023-08-24 08:53:32,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:53:32,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:53:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:53:32,901 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 08:53:32,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:53:32,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765209595] [2023-08-24 08:53:32,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765209595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:53:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551250328] [2023-08-24 08:53:32,902 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:53:32,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:32,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:53:32,903 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:53:32,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-08-24 08:53:33,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:53:33,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:53:33,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 08:53:33,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:53:33,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:33,422 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 08:53:33,527 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:33,528 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 08:53:33,549 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 08:53:33,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:53:33,660 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_5885 (Array Int Int)) (~B~0.base Int)) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5885))) (let ((.cse1 (select .cse0 ~B~0.base))) (<= (+ c_~csum~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset) (select .cse1 c_~B~0.offset)) (+ (select .cse1 .cse2) c_~asum~0 c_~bsum~0))))) (forall ((v_ArrVal_5885 (Array Int Int)) (~B~0.base Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5885))) (let ((.cse3 (select .cse4 ~B~0.base))) (<= (+ (select .cse3 .cse2) c_~asum~0 c_~bsum~0) (+ c_~csum~0 (select (select .cse4 c_~A~0.base) c_~A~0.offset) (select .cse3 c_~B~0.offset)))))))) is different from false [2023-08-24 08:53:33,697 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:33,697 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 08:53:33,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:33,715 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 08:53:33,959 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:34,072 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 08:53:34,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551250328] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:53:34,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:53:34,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 9] total 26 [2023-08-24 08:53:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105437379] [2023-08-24 08:53:34,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:53:34,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 08:53:34,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:53:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 08:53:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=592, Unknown=1, NotChecked=50, Total=756 [2023-08-24 08:53:34,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 08:53:34,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 621 places, 1131 transitions, 22606 flow. Second operand has 28 states, 28 states have (on average 236.5) internal successors, (6622), 28 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:34,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:53:34,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 08:53:34,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:53:39,881 INFO L124 PetriNetUnfolderBase]: 10416/15225 cut-off events. [2023-08-24 08:53:39,881 INFO L125 PetriNetUnfolderBase]: For 704648/704648 co-relation queries the response was YES. [2023-08-24 08:53:40,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126952 conditions, 15225 events. 10416/15225 cut-off events. For 704648/704648 co-relation queries the response was YES. Maximal size of possible extension queue 815. Compared 90758 event pairs, 3597 based on Foata normal form. 1/15226 useless extension candidates. Maximal degree in co-relation 126654. Up to 14386 conditions per place. [2023-08-24 08:53:40,270 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 964 selfloop transitions, 218 changer transitions 1/1183 dead transitions. [2023-08-24 08:53:40,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 1183 transitions, 26396 flow [2023-08-24 08:53:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:53:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:53:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2439 transitions. [2023-08-24 08:53:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35093525179856117 [2023-08-24 08:53:40,272 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2439 transitions. [2023-08-24 08:53:40,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2439 transitions. [2023-08-24 08:53:40,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:53:40,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2439 transitions. [2023-08-24 08:53:40,274 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 08:53:40,276 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 08:53:40,277 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 08:53:40,277 INFO L175 Difference]: Start difference. First operand has 621 places, 1131 transitions, 22606 flow. Second operand 10 states and 2439 transitions. [2023-08-24 08:53:40,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 1183 transitions, 26396 flow [2023-08-24 08:53:44,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 622 places, 1183 transitions, 25460 flow, removed 346 selfloop flow, removed 8 redundant places. [2023-08-24 08:53:44,199 INFO L231 Difference]: Finished difference. Result has 624 places, 1141 transitions, 23231 flow [2023-08-24 08:53:44,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=21676, PETRI_DIFFERENCE_MINUEND_PLACES=613, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=918, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23231, PETRI_PLACES=624, PETRI_TRANSITIONS=1141} [2023-08-24 08:53:44,200 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 592 predicate places. [2023-08-24 08:53:44,200 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 1141 transitions, 23231 flow [2023-08-24 08:53:44,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 236.5) internal successors, (6622), 28 states have internal predecessors, (6622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:44,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:53:44,201 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 08:53:44,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-08-24 08:53:44,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-08-24 08:53:44,401 INFO L420 AbstractCegarLoop]: === Iteration 90 === 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 08:53:44,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:53:44,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1685547617, now seen corresponding path program 83 times [2023-08-24 08:53:44,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:53:44,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454702819] [2023-08-24 08:53:44,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:53:44,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:53:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:53:45,150 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 08:53:45,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:53:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454702819] [2023-08-24 08:53:45,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454702819] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:53:45,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564831881] [2023-08-24 08:53:45,150 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:53:45,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:45,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:53:45,151 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:53:45,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-08-24 08:53:45,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:53:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:53:45,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-24 08:53:45,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:53:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:45,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:53:45,739 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:53:45,739 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 08:53:45,820 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:45,820 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 24 [2023-08-24 08:53:45,845 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 08:53:45,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:53:45,937 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_5952 (Array Int Int))) (<= (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5952))) (+ (select (select .cse0 c_~B~0.base) c_~B~0.offset) (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~csum~0)) .cse1)) (forall ((v_ArrVal_5952 (Array Int Int))) (<= .cse1 (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5952))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0)))))) is different from false [2023-08-24 08:53:45,944 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_5952 (Array Int Int))) (<= .cse0 (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5952))) (+ (select (select .cse1 c_~B~0.base) c_~B~0.offset) (select (select .cse1 c_~A~0.base) c_~A~0.offset) c_~csum~0)))) (forall ((v_ArrVal_5952 (Array Int Int))) (<= (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_5952))) (+ (select (select .cse2 c_~B~0.base) c_~B~0.offset) (select (select .cse2 c_~A~0.base) c_~A~0.offset) c_~csum~0)) .cse0)))) is different from false [2023-08-24 08:53:45,973 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:45,974 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 08:53:45,983 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:53:45,983 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 08:53:46,311 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:46,312 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:53:46,498 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 08:53:46,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564831881] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:53:46,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:53:46,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2023-08-24 08:53:46,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344456072] [2023-08-24 08:53:46,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:53:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 08:53:46,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:53:46,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 08:53:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=719, Unknown=2, NotChecked=110, Total=930 [2023-08-24 08:53:46,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 695 [2023-08-24 08:53:46,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 1141 transitions, 23231 flow. Second operand has 31 states, 31 states have (on average 198.25806451612902) internal successors, (6146), 31 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:46,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:53:46,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 695 [2023-08-24 08:53:46,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:53:53,226 INFO L124 PetriNetUnfolderBase]: 10544/15414 cut-off events. [2023-08-24 08:53:53,226 INFO L125 PetriNetUnfolderBase]: For 761625/761625 co-relation queries the response was YES. [2023-08-24 08:53:53,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130426 conditions, 15414 events. 10544/15414 cut-off events. For 761625/761625 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 91948 event pairs, 3601 based on Foata normal form. 1/15415 useless extension candidates. Maximal degree in co-relation 130125. Up to 14440 conditions per place. [2023-08-24 08:53:53,514 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 965 selfloop transitions, 238 changer transitions 1/1204 dead transitions. [2023-08-24 08:53:53,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 1204 transitions, 27188 flow [2023-08-24 08:53:53,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 08:53:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 08:53:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2682 transitions. [2023-08-24 08:53:53,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29684560044272273 [2023-08-24 08:53:53,517 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2682 transitions. [2023-08-24 08:53:53,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2682 transitions. [2023-08-24 08:53:53,517 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:53:53,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2682 transitions. [2023-08-24 08:53:53,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 206.30769230769232) internal successors, (2682), 13 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:53,522 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 08:53:53,522 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 08:53:53,522 INFO L175 Difference]: Start difference. First operand has 624 places, 1141 transitions, 23231 flow. Second operand 13 states and 2682 transitions. [2023-08-24 08:53:53,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 1204 transitions, 27188 flow [2023-08-24 08:53:58,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 631 places, 1204 transitions, 25954 flow, removed 500 selfloop flow, removed 5 redundant places. [2023-08-24 08:53:58,893 INFO L231 Difference]: Finished difference. Result has 634 places, 1150 transitions, 23608 flow [2023-08-24 08:53:58,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=21999, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=907, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=23608, PETRI_PLACES=634, PETRI_TRANSITIONS=1150} [2023-08-24 08:53:58,894 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 602 predicate places. [2023-08-24 08:53:58,894 INFO L495 AbstractCegarLoop]: Abstraction has has 634 places, 1150 transitions, 23608 flow [2023-08-24 08:53:58,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 198.25806451612902) internal successors, (6146), 31 states have internal predecessors, (6146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:53:58,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:53:58,895 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 08:53:58,901 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2023-08-24 08:53:59,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:59,100 INFO L420 AbstractCegarLoop]: === Iteration 91 === 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 08:53:59,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:53:59,100 INFO L85 PathProgramCache]: Analyzing trace with hash -471268293, now seen corresponding path program 84 times [2023-08-24 08:53:59,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:53:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444070228] [2023-08-24 08:53:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:53:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:53:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:53:59,626 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 08:53:59,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:53:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444070228] [2023-08-24 08:53:59,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444070228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:53:59,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575209028] [2023-08-24 08:53:59,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:53:59,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:53:59,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:53:59,627 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:53:59,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-08-24 08:53:59,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 08:53:59,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:53:59,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-24 08:53:59,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:54:00,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:00,156 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 08:54:00,229 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:00,230 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 08:54:00,253 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 08:54:00,253 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:54:00,375 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ (* |c_thread2Thread1of1ForFork0_~i~1#1| 4) c_~B~0.offset))) (and (forall ((v_ArrVal_6019 (Array Int Int)) (~B~0.base Int)) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6019))) (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_6019 (Array Int Int)) (~B~0.base Int)) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6019))) (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 08:54:00,405 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:00,405 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 08:54:00,423 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:00,423 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 08:54:00,716 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:54:00,824 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 08:54:00,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575209028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:54:00,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:54:00,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2023-08-24 08:54:00,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045459257] [2023-08-24 08:54:00,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:54:00,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:54:00,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:54:00,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:54:00,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=543, Unknown=1, NotChecked=48, Total=702 [2023-08-24 08:54:00,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 695 [2023-08-24 08:54:00,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 634 places, 1150 transitions, 23608 flow. Second operand has 27 states, 27 states have (on average 236.2962962962963) internal successors, (6380), 27 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:00,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:54:00,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 695 [2023-08-24 08:54:00,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:54:06,799 INFO L124 PetriNetUnfolderBase]: 10604/15503 cut-off events. [2023-08-24 08:54:06,800 INFO L125 PetriNetUnfolderBase]: For 690555/690555 co-relation queries the response was YES. [2023-08-24 08:54:07,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129569 conditions, 15503 events. 10604/15503 cut-off events. For 690555/690555 co-relation queries the response was YES. Maximal size of possible extension queue 826. Compared 92302 event pairs, 3794 based on Foata normal form. 1/15504 useless extension candidates. Maximal degree in co-relation 129262. Up to 14888 conditions per place. [2023-08-24 08:54:07,225 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 990 selfloop transitions, 202 changer transitions 1/1193 dead transitions. [2023-08-24 08:54:07,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 643 places, 1193 transitions, 26784 flow [2023-08-24 08:54:07,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 08:54:07,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 08:54:07,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 2433 transitions. [2023-08-24 08:54:07,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35007194244604317 [2023-08-24 08:54:07,227 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 2433 transitions. [2023-08-24 08:54:07,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 2433 transitions. [2023-08-24 08:54:07,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:54:07,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 2433 transitions. [2023-08-24 08:54:07,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 243.3) internal successors, (2433), 10 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:07,232 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 08:54:07,232 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 08:54:07,232 INFO L175 Difference]: Start difference. First operand has 634 places, 1150 transitions, 23608 flow. Second operand 10 states and 2433 transitions. [2023-08-24 08:54:07,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 643 places, 1193 transitions, 26784 flow [2023-08-24 08:54:12,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 638 places, 1193 transitions, 25592 flow, removed 493 selfloop flow, removed 5 redundant places. [2023-08-24 08:54:12,157 INFO L231 Difference]: Finished difference. Result has 640 places, 1155 transitions, 23316 flow [2023-08-24 08:54:12,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=22418, PETRI_DIFFERENCE_MINUEND_PLACES=629, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=23316, PETRI_PLACES=640, PETRI_TRANSITIONS=1155} [2023-08-24 08:54:12,158 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 608 predicate places. [2023-08-24 08:54:12,158 INFO L495 AbstractCegarLoop]: Abstraction has has 640 places, 1155 transitions, 23316 flow [2023-08-24 08:54:12,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 236.2962962962963) internal successors, (6380), 27 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:12,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:54:12,159 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 08:54:12,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2023-08-24 08:54:12,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:12,359 INFO L420 AbstractCegarLoop]: === Iteration 92 === 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 08:54:12,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:54:12,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1924450143, now seen corresponding path program 85 times [2023-08-24 08:54:12,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:54:12,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134472298] [2023-08-24 08:54:12,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:54:12,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:54:12,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:54:12,913 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 08:54:12,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:54:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134472298] [2023-08-24 08:54:12,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134472298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:54:12,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897397918] [2023-08-24 08:54:12,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:54:12,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:12,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:54:12,914 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:54:12,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-08-24 08:54:13,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:54:13,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:54:13,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:54:13,258 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:54:13,258 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 08:54:13,290 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:54:13,291 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 08:54:13,342 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:54:13,342 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 08:54:13,542 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 08:54:13,756 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 08:54:13,774 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 08:54:13,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:54:13,911 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:13,911 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 155 treesize of output 175 [2023-08-24 08:54:14,419 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:54:14,419 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:54:14,634 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 08:54:14,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897397918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:54:14,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:54:14,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2023-08-24 08:54:14,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51332416] [2023-08-24 08:54:14,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:54:14,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:54:14,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:54:14,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:54:14,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-08-24 08:54:14,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:54:14,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 640 places, 1155 transitions, 23316 flow. Second operand has 29 states, 29 states have (on average 211.3448275862069) internal successors, (6129), 29 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:14,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:54:14,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:54:14,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:54:20,760 INFO L124 PetriNetUnfolderBase]: 10724/15676 cut-off events. [2023-08-24 08:54:20,760 INFO L125 PetriNetUnfolderBase]: For 696951/696951 co-relation queries the response was YES. [2023-08-24 08:54:20,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131129 conditions, 15676 events. 10724/15676 cut-off events. For 696951/696951 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 93632 event pairs, 3614 based on Foata normal form. 1/15677 useless extension candidates. Maximal degree in co-relation 130821. Up to 15029 conditions per place. [2023-08-24 08:54:21,054 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 968 selfloop transitions, 221 changer transitions 1/1190 dead transitions. [2023-08-24 08:54:21,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 651 places, 1190 transitions, 26983 flow [2023-08-24 08:54:21,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:54:21,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:54:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2591 transitions. [2023-08-24 08:54:21,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31067146282973623 [2023-08-24 08:54:21,056 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2591 transitions. [2023-08-24 08:54:21,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2591 transitions. [2023-08-24 08:54:21,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:54:21,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2591 transitions. [2023-08-24 08:54:21,058 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 08:54:21,061 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 08:54:21,061 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 08:54:21,061 INFO L175 Difference]: Start difference. First operand has 640 places, 1155 transitions, 23316 flow. Second operand 12 states and 2591 transitions. [2023-08-24 08:54:21,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 651 places, 1190 transitions, 26983 flow [2023-08-24 08:54:25,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 1190 transitions, 26163 flow, removed 217 selfloop flow, removed 7 redundant places. [2023-08-24 08:54:25,614 INFO L231 Difference]: Finished difference. Result has 646 places, 1165 transitions, 24067 flow [2023-08-24 08:54:25,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=22510, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=939, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24067, PETRI_PLACES=646, PETRI_TRANSITIONS=1165} [2023-08-24 08:54:25,615 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 614 predicate places. [2023-08-24 08:54:25,615 INFO L495 AbstractCegarLoop]: Abstraction has has 646 places, 1165 transitions, 24067 flow [2023-08-24 08:54:25,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 211.3448275862069) internal successors, (6129), 29 states have internal predecessors, (6129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:25,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:54:25,616 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 08:54:25,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-08-24 08:54:25,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:25,821 INFO L420 AbstractCegarLoop]: === Iteration 93 === 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 08:54:25,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:54:25,821 INFO L85 PathProgramCache]: Analyzing trace with hash 905189761, now seen corresponding path program 86 times [2023-08-24 08:54:25,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:54:25,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997732118] [2023-08-24 08:54:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:54:25,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:54:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:54:26,304 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 08:54:26,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:54:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997732118] [2023-08-24 08:54:26,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997732118] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:54:26,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939417530] [2023-08-24 08:54:26,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:54:26,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:26,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:54:26,305 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:54:26,306 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-08-24 08:54:26,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:54:26,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:54:26,660 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 08:54:26,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:54:26,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:26,842 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 08:54:26,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:26,963 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 08:54:26,978 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 08:54:26,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:54:27,141 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:27,141 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 08:54:27,143 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 08:54:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:54:27,259 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 08:54:27,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939417530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:54:27,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:54:27,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2023-08-24 08:54:27,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744537977] [2023-08-24 08:54:27,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:54:27,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 08:54:27,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:54:27,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 08:54:27,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=599, Unknown=4, NotChecked=0, Total=702 [2023-08-24 08:54:27,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 08:54:27,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 646 places, 1165 transitions, 24067 flow. Second operand has 27 states, 27 states have (on average 230.37037037037038) internal successors, (6220), 27 states have internal predecessors, (6220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:27,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:54:27,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 08:54:27,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:54:33,469 INFO L124 PetriNetUnfolderBase]: 10930/15977 cut-off events. [2023-08-24 08:54:33,470 INFO L125 PetriNetUnfolderBase]: For 811755/811755 co-relation queries the response was YES. [2023-08-24 08:54:33,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136766 conditions, 15977 events. 10930/15977 cut-off events. For 811755/811755 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 95491 event pairs, 3253 based on Foata normal form. 1/15978 useless extension candidates. Maximal degree in co-relation 136456. Up to 14955 conditions per place. [2023-08-24 08:54:33,901 INFO L140 encePairwiseOnDemand]: 686/695 looper letters, 966 selfloop transitions, 254 changer transitions 1/1221 dead transitions. [2023-08-24 08:54:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 654 places, 1221 transitions, 28414 flow [2023-08-24 08:54:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:54:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:54:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2151 transitions. [2023-08-24 08:54:33,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34388489208633094 [2023-08-24 08:54:33,903 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2151 transitions. [2023-08-24 08:54:33,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2151 transitions. [2023-08-24 08:54:33,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:54:33,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2151 transitions. [2023-08-24 08:54:33,905 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 08:54:33,907 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 08:54:33,908 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 08:54:33,908 INFO L175 Difference]: Start difference. First operand has 646 places, 1165 transitions, 24067 flow. Second operand 9 states and 2151 transitions. [2023-08-24 08:54:33,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 654 places, 1221 transitions, 28414 flow [2023-08-24 08:54:38,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 647 places, 1221 transitions, 27107 flow, removed 516 selfloop flow, removed 7 redundant places. [2023-08-24 08:54:39,003 INFO L231 Difference]: Finished difference. Result has 651 places, 1181 transitions, 24950 flow [2023-08-24 08:54:39,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=22762, PETRI_DIFFERENCE_MINUEND_PLACES=639, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=24950, PETRI_PLACES=651, PETRI_TRANSITIONS=1181} [2023-08-24 08:54:39,004 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 619 predicate places. [2023-08-24 08:54:39,004 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 1181 transitions, 24950 flow [2023-08-24 08:54:39,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 230.37037037037038) internal successors, (6220), 27 states have internal predecessors, (6220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:39,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:54:39,005 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 08:54:39,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-08-24 08:54:39,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2023-08-24 08:54:39,211 INFO L420 AbstractCegarLoop]: === Iteration 94 === 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 08:54:39,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:54:39,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2024199345, now seen corresponding path program 87 times [2023-08-24 08:54:39,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:54:39,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41610432] [2023-08-24 08:54:39,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:54:39,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:54:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:54:39,822 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 08:54:39,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:54:39,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41610432] [2023-08-24 08:54:39,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41610432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:54:39,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621513561] [2023-08-24 08:54:39,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:54:39,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:39,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:54:39,823 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:54:39,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-08-24 08:54:40,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 08:54:40,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:54:40,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:54:40,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:54:40,194 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:54:40,194 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 08:54:40,228 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:54:40,228 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 08:54:40,277 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:54:40,277 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 08:54:40,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:40,536 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 08:54:40,627 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:54:40,627 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 08:54:40,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:40,749 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 08:54:40,795 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 08:54:40,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:54:42,882 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_6229 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6229))) (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) (+ 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_~A~0.base) c_~A~0.offset)))))) (forall ((~C~0.offset Int) (v_ArrVal_6229 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6229))) (let ((.cse4 (select (select .cse3 c_~B~0.base) c_~B~0.offset)) (.cse5 (select (select .cse3 c_~A~0.base) c_~A~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_~A~0.base) c_~A~0.offset)) (+ c_~csum~0 .cse4 .cse5)))))) is different from false [2023-08-24 08:54:42,905 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:42,906 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 2092 treesize of output 1834 [2023-08-24 08:54:42,925 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:42,925 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 08:54:44,943 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 08:54:44,946 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 08:54:44,954 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:44,955 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 08:54:44,966 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:44,966 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 08:54:45,002 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:45,003 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 169 treesize of output 129 [2023-08-24 08:54:45,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:45,035 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 08:54:45,039 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:54:45,058 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:45,059 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 157 treesize of output 113 [2023-08-24 08:54:45,117 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:54:45,117 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 169 treesize of output 129 [2023-08-24 08:54:45,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:45,264 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 34 [2023-08-24 08:54:45,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:45,299 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 08:54:45,303 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 08:54:45,319 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:54:45,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:45,347 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 08:54:45,350 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:54:45,367 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:54:45,368 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:54:45,370 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 08:54:45,643 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 08:54:45,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621513561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:54:45,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:54:45,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-24 08:54:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437354285] [2023-08-24 08:54:45,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:54:45,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:54:45,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:54:45,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:54:45,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=658, Unknown=1, NotChecked=52, Total=812 [2023-08-24 08:54:45,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 695 [2023-08-24 08:54:45,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 1181 transitions, 24950 flow. Second operand has 29 states, 29 states have (on average 208.13793103448276) internal successors, (6036), 29 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:45,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:54:45,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 695 [2023-08-24 08:54:45,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:54:52,524 INFO L124 PetriNetUnfolderBase]: 11020/16108 cut-off events. [2023-08-24 08:54:52,524 INFO L125 PetriNetUnfolderBase]: For 802453/802453 co-relation queries the response was YES. [2023-08-24 08:54:52,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138022 conditions, 16108 events. 11020/16108 cut-off events. For 802453/802453 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 96320 event pairs, 3354 based on Foata normal form. 1/16109 useless extension candidates. Maximal degree in co-relation 137709. Up to 15324 conditions per place. [2023-08-24 08:54:52,832 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 969 selfloop transitions, 252 changer transitions 1/1222 dead transitions. [2023-08-24 08:54:52,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 1222 transitions, 29011 flow [2023-08-24 08:54:52,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:54:52,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:54:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2557 transitions. [2023-08-24 08:54:52,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3065947242206235 [2023-08-24 08:54:52,834 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2557 transitions. [2023-08-24 08:54:52,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2557 transitions. [2023-08-24 08:54:52,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:54:52,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2557 transitions. [2023-08-24 08:54:52,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.08333333333334) internal successors, (2557), 12 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:52,839 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 08:54:52,839 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 08:54:52,840 INFO L175 Difference]: Start difference. First operand has 651 places, 1181 transitions, 24950 flow. Second operand 12 states and 2557 transitions. [2023-08-24 08:54:52,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 1222 transitions, 29011 flow [2023-08-24 08:54:58,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 660 places, 1222 transitions, 26996 flow, removed 921 selfloop flow, removed 2 redundant places. [2023-08-24 08:54:58,394 INFO L231 Difference]: Finished difference. Result has 664 places, 1195 transitions, 24979 flow [2023-08-24 08:54:58,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=23403, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=24979, PETRI_PLACES=664, PETRI_TRANSITIONS=1195} [2023-08-24 08:54:58,395 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 632 predicate places. [2023-08-24 08:54:58,395 INFO L495 AbstractCegarLoop]: Abstraction has has 664 places, 1195 transitions, 24979 flow [2023-08-24 08:54:58,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 208.13793103448276) internal successors, (6036), 29 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:54:58,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:54:58,395 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 08:54:58,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2023-08-24 08:54:58,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:58,603 INFO L420 AbstractCegarLoop]: === Iteration 95 === 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 08:54:58,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:54:58,603 INFO L85 PathProgramCache]: Analyzing trace with hash 688457641, now seen corresponding path program 88 times [2023-08-24 08:54:58,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:54:58,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206996522] [2023-08-24 08:54:58,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:54:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:54:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:54:59,238 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 08:54:59,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:54:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206996522] [2023-08-24 08:54:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206996522] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:54:59,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393024768] [2023-08-24 08:54:59,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:54:59,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:54:59,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:54:59,239 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:54:59,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-08-24 08:54:59,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:54:59,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:54:59,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 93 conjunts are in the unsatisfiable core [2023-08-24 08:54:59,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:54:59,601 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:54:59,601 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 08:54:59,640 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:54:59,640 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 08:54:59,692 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:54:59,692 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 08:54:59,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:54:59,971 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 08:55:00,050 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:55:00,050 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 08:55:00,175 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:00,175 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 08:55:00,261 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 08:55:00,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:55:03,761 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_6301 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6301))) (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_~A~0.base) c_~A~0.offset)) (+ .cse1 c_~csum~0 .cse2))))) (forall ((~C~0.offset Int) (v_ArrVal_6301 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6301))) (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_~A~0.base) c_~A~0.offset))))))) is different from false [2023-08-24 08:55:03,788 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:03,788 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 1784 treesize of output 1554 [2023-08-24 08:55:03,807 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:03,807 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 542 [2023-08-24 08:55:05,515 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:05,520 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:05,887 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:05,888 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 86 treesize of output 68 [2023-08-24 08:55:05,891 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 52 [2023-08-24 08:55:05,923 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 850 treesize of output 818 [2023-08-24 08:55:05,937 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:05,937 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 818 treesize of output 548 [2023-08-24 08:55:06,026 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:06,031 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:06,036 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 08:55:06,056 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:06,059 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:06,131 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:06,131 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 1001 treesize of output 677 [2023-08-24 08:55:06,779 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:06,779 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 08:55:06,807 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-24 08:55:06,807 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 12 [2023-08-24 08:55:06,833 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:06,835 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:06,837 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 08:55:07,124 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 08:55:07,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393024768] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:55:07,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:55:07,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2023-08-24 08:55:07,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580858449] [2023-08-24 08:55:07,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:55:07,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 08:55:07,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:55:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 08:55:07,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=658, Unknown=1, NotChecked=52, Total=812 [2023-08-24 08:55:07,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 206 out of 695 [2023-08-24 08:55:07,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 664 places, 1195 transitions, 24979 flow. Second operand has 29 states, 29 states have (on average 208.13793103448276) internal successors, (6036), 29 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:07,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:55:07,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 206 of 695 [2023-08-24 08:55:07,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:55:14,051 INFO L124 PetriNetUnfolderBase]: 11100/16225 cut-off events. [2023-08-24 08:55:14,051 INFO L125 PetriNetUnfolderBase]: For 711559/711559 co-relation queries the response was YES. [2023-08-24 08:55:14,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136593 conditions, 16225 events. 11100/16225 cut-off events. For 711559/711559 co-relation queries the response was YES. Maximal size of possible extension queue 861. Compared 97304 event pairs, 3387 based on Foata normal form. 1/16226 useless extension candidates. Maximal degree in co-relation 136273. Up to 15441 conditions per place. [2023-08-24 08:55:14,368 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 978 selfloop transitions, 251 changer transitions 1/1230 dead transitions. [2023-08-24 08:55:14,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 1230 transitions, 28507 flow [2023-08-24 08:55:14,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:55:14,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:55:14,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2559 transitions. [2023-08-24 08:55:14,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30683453237410074 [2023-08-24 08:55:14,370 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2559 transitions. [2023-08-24 08:55:14,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2559 transitions. [2023-08-24 08:55:14,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:55:14,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2559 transitions. [2023-08-24 08:55:14,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 213.25) internal successors, (2559), 12 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:14,375 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 08:55:14,375 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 08:55:14,375 INFO L175 Difference]: Start difference. First operand has 664 places, 1195 transitions, 24979 flow. Second operand 12 states and 2559 transitions. [2023-08-24 08:55:14,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 1230 transitions, 28507 flow [2023-08-24 08:55:21,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 670 places, 1230 transitions, 27506 flow, removed 406 selfloop flow, removed 5 redundant places. [2023-08-24 08:55:21,782 INFO L231 Difference]: Finished difference. Result has 673 places, 1202 transitions, 25362 flow [2023-08-24 08:55:21,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=24010, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=25362, PETRI_PLACES=673, PETRI_TRANSITIONS=1202} [2023-08-24 08:55:21,783 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 641 predicate places. [2023-08-24 08:55:21,783 INFO L495 AbstractCegarLoop]: Abstraction has has 673 places, 1202 transitions, 25362 flow [2023-08-24 08:55:21,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 208.13793103448276) internal successors, (6036), 29 states have internal predecessors, (6036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:21,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:55:21,784 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 08:55:21,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2023-08-24 08:55:21,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:55:21,984 INFO L420 AbstractCegarLoop]: === Iteration 96 === 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 08:55:21,984 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:55:21,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2082765761, now seen corresponding path program 89 times [2023-08-24 08:55:21,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:55:21,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375892021] [2023-08-24 08:55:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:55:21,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:55:22,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:55:22,556 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 08:55:22,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:55:22,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375892021] [2023-08-24 08:55:22,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375892021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:55:22,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471333588] [2023-08-24 08:55:22,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:55:22,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:55:22,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:55:22,557 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:55:22,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2023-08-24 08:55:22,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 08:55:22,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:55:22,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 96 conjunts are in the unsatisfiable core [2023-08-24 08:55:22,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:55:22,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:55:22,913 INFO L322 Elim1Store]: treesize reduction 62, result has 31.1 percent of original size [2023-08-24 08:55:22,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 38 [2023-08-24 08:55:22,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:55:22,973 INFO L322 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-08-24 08:55:22,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2023-08-24 08:55:23,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:55:23,039 INFO L322 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-08-24 08:55:23,039 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 16 treesize of output 18 [2023-08-24 08:55:23,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 08:55:23,359 INFO L322 Elim1Store]: treesize reduction 19, result has 44.1 percent of original size [2023-08-24 08:55:23,359 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 29 treesize of output 35 [2023-08-24 08:55:23,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:23,551 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 80 treesize of output 100 [2023-08-24 08:55:23,601 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 08:55:23,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:55:24,695 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((~C~0.offset Int) (v_ArrVal_6373 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6373))) (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))) (<= (+ .cse0 c_~csum~0 .cse1) (+ (select (select (store .cse2 c_~C~0.base (store (select .cse2 c_~C~0.base) ~C~0.offset (+ .cse0 .cse1))) c_~A~0.base) c_~A~0.offset) c_~asum~0 c_~bsum~0))))) (forall ((~C~0.offset Int) (v_ArrVal_6373 (Array Int Int))) (let ((.cse3 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6373))) (let ((.cse4 (select (select .cse3 c_~B~0.base) c_~B~0.offset)) (.cse5 (select (select .cse3 c_~A~0.base) c_~A~0.offset))) (<= (+ (select (select (store .cse3 c_~C~0.base (store (select .cse3 c_~C~0.base) ~C~0.offset (+ .cse4 .cse5))) c_~A~0.base) c_~A~0.offset) c_~asum~0 c_~bsum~0) (+ .cse4 c_~csum~0 .cse5)))))) is different from false [2023-08-24 08:55:24,735 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:24,736 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 1440 treesize of output 1274 [2023-08-24 08:55:24,751 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:24,752 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 566 treesize of output 542 [2023-08-24 08:55:26,387 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:27,342 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 149 treesize of output 143 [2023-08-24 08:55:27,349 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,349 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 160 treesize of output 114 [2023-08-24 08:55:27,369 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 08:55:27,376 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,376 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 08:55:27,383 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 08:55:27,412 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-08-24 08:55:27,430 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,430 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 72 treesize of output 56 [2023-08-24 08:55:27,456 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 54 treesize of output 35 [2023-08-24 08:55:27,470 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,471 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 08:55:27,535 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,535 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 75 treesize of output 75 [2023-08-24 08:55:27,591 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,591 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 08:55:27,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,636 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 1148 treesize of output 742 [2023-08-24 08:55:27,876 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:27,876 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 141 treesize of output 123 [2023-08-24 08:55:27,909 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:27,910 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:27,912 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 08:55:28,185 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 08:55:28,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471333588] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:55:28,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:55:28,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-24 08:55:28,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718824452] [2023-08-24 08:55:28,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:55:28,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:55:28,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:55:28,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:55:28,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=872, Unknown=1, NotChecked=60, Total=1056 [2023-08-24 08:55:28,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 695 [2023-08-24 08:55:28,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 673 places, 1202 transitions, 25362 flow. Second operand has 33 states, 33 states have (on average 223.06060606060606) internal successors, (7361), 33 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:28,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:55:28,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 695 [2023-08-24 08:55:28,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:55:35,099 INFO L124 PetriNetUnfolderBase]: 11200/16370 cut-off events. [2023-08-24 08:55:35,099 INFO L125 PetriNetUnfolderBase]: For 752490/752490 co-relation queries the response was YES. [2023-08-24 08:55:35,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138733 conditions, 16370 events. 11200/16370 cut-off events. For 752490/752490 co-relation queries the response was YES. Maximal size of possible extension queue 869. Compared 98161 event pairs, 3352 based on Foata normal form. 1/16371 useless extension candidates. Maximal degree in co-relation 138409. Up to 15418 conditions per place. [2023-08-24 08:55:35,429 INFO L140 encePairwiseOnDemand]: 684/695 looper letters, 953 selfloop transitions, 285 changer transitions 1/1239 dead transitions. [2023-08-24 08:55:35,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 1239 transitions, 29191 flow [2023-08-24 08:55:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 08:55:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 08:55:35,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2739 transitions. [2023-08-24 08:55:35,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32841726618705036 [2023-08-24 08:55:35,433 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2739 transitions. [2023-08-24 08:55:35,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2739 transitions. [2023-08-24 08:55:35,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:55:35,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2739 transitions. [2023-08-24 08:55:35,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 228.25) internal successors, (2739), 12 states have internal predecessors, (2739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:35,438 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 08:55:35,438 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 08:55:35,438 INFO L175 Difference]: Start difference. First operand has 673 places, 1202 transitions, 25362 flow. Second operand 12 states and 2739 transitions. [2023-08-24 08:55:35,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 1239 transitions, 29191 flow [2023-08-24 08:55:39,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 1239 transitions, 28132 flow, removed 372 selfloop flow, removed 7 redundant places. [2023-08-24 08:55:39,327 INFO L231 Difference]: Finished difference. Result has 680 places, 1211 transitions, 26059 flow [2023-08-24 08:55:39,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=24305, PETRI_DIFFERENCE_MINUEND_PLACES=666, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=26059, PETRI_PLACES=680, PETRI_TRANSITIONS=1211} [2023-08-24 08:55:39,328 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 648 predicate places. [2023-08-24 08:55:39,328 INFO L495 AbstractCegarLoop]: Abstraction has has 680 places, 1211 transitions, 26059 flow [2023-08-24 08:55:39,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 223.06060606060606) internal successors, (7361), 33 states have internal predecessors, (7361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:39,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:55:39,329 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 08:55:39,334 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2023-08-24 08:55:39,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:55:39,529 INFO L420 AbstractCegarLoop]: === Iteration 97 === 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 08:55:39,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:55:39,530 INFO L85 PathProgramCache]: Analyzing trace with hash 130184879, now seen corresponding path program 90 times [2023-08-24 08:55:39,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:55:39,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040657589] [2023-08-24 08:55:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:55:39,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:55:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:55:40,078 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 08:55:40,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:55:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040657589] [2023-08-24 08:55:40,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040657589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:55:40,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563627988] [2023-08-24 08:55:40,079 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 08:55:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:55:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:55:40,080 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:55:40,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2023-08-24 08:55:40,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 08:55:40,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:55:40,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 89 conjunts are in the unsatisfiable core [2023-08-24 08:55:40,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:55:40,460 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:55:40,460 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 08:55:40,489 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-24 08:55:40,489 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 08:55:40,531 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 08:55:40,531 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 08:55:40,707 INFO L322 Elim1Store]: treesize reduction 27, result has 35.7 percent of original size [2023-08-24 08:55:40,708 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 08:55:40,801 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:40,802 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 08:55:40,858 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 08:55:40,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:55:40,993 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:40,993 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 08:55:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:41,140 INFO L322 Elim1Store]: treesize reduction 65, result has 23.5 percent of original size [2023-08-24 08:55:41,140 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 08:55:41,401 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 08:55:41,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563627988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:55:41,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:55:41,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2023-08-24 08:55:41,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676242694] [2023-08-24 08:55:41,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:55:41,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 08:55:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:55:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 08:55:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-08-24 08:55:41,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 209 out of 695 [2023-08-24 08:55:41,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 680 places, 1211 transitions, 26059 flow. Second operand has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:41,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:55:41,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 209 of 695 [2023-08-24 08:55:41,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:55:48,244 INFO L124 PetriNetUnfolderBase]: 11280/16487 cut-off events. [2023-08-24 08:55:48,245 INFO L125 PetriNetUnfolderBase]: For 742573/742573 co-relation queries the response was YES. [2023-08-24 08:55:48,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139843 conditions, 16487 events. 11280/16487 cut-off events. For 742573/742573 co-relation queries the response was YES. Maximal size of possible extension queue 878. Compared 99066 event pairs, 4224 based on Foata normal form. 1/16488 useless extension candidates. Maximal degree in co-relation 139515. Up to 16092 conditions per place. [2023-08-24 08:55:48,571 INFO L140 encePairwiseOnDemand]: 685/695 looper letters, 1062 selfloop transitions, 176 changer transitions 1/1239 dead transitions. [2023-08-24 08:55:48,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 690 places, 1239 transitions, 29199 flow [2023-08-24 08:55:48,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 08:55:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 08:55:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2376 transitions. [2023-08-24 08:55:48,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3107913669064748 [2023-08-24 08:55:48,574 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2376 transitions. [2023-08-24 08:55:48,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2376 transitions. [2023-08-24 08:55:48,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:55:48,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2376 transitions. [2023-08-24 08:55:48,575 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 216.0) internal successors, (2376), 11 states have internal predecessors, (2376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:48,578 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 08:55:48,578 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 08:55:48,578 INFO L175 Difference]: Start difference. First operand has 680 places, 1211 transitions, 26059 flow. Second operand 11 states and 2376 transitions. [2023-08-24 08:55:48,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 690 places, 1239 transitions, 29199 flow [2023-08-24 08:55:52,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 683 places, 1239 transitions, 27844 flow, removed 518 selfloop flow, removed 7 redundant places. [2023-08-24 08:55:52,998 INFO L231 Difference]: Finished difference. Result has 685 places, 1217 transitions, 25569 flow [2023-08-24 08:55:52,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=24706, PETRI_DIFFERENCE_MINUEND_PLACES=673, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1035, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=25569, PETRI_PLACES=685, PETRI_TRANSITIONS=1217} [2023-08-24 08:55:52,998 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 653 predicate places. [2023-08-24 08:55:52,998 INFO L495 AbstractCegarLoop]: Abstraction has has 685 places, 1217 transitions, 25569 flow [2023-08-24 08:55:52,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 211.30434782608697) internal successors, (4860), 23 states have internal predecessors, (4860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:52,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:55:52,999 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 08:55:53,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2023-08-24 08:55:53,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:55:53,199 INFO L420 AbstractCegarLoop]: === Iteration 98 === 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 08:55:53,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:55:53,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1693852951, now seen corresponding path program 91 times [2023-08-24 08:55:53,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:55:53,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111948003] [2023-08-24 08:55:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:55:53,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:55:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:55:54,269 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 08:55:54,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:55:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111948003] [2023-08-24 08:55:54,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111948003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:55:54,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077406174] [2023-08-24 08:55:54,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 08:55:54,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:55:54,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:55:54,270 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:55:54,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2023-08-24 08:55:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:55:54,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2023-08-24 08:55:54,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:55:54,632 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:55:54,632 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 08:55:54,672 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:55:54,672 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 08:55:54,721 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:55:54,721 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 08:55:54,848 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 08:55:54,848 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 08:55:55,078 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:55,078 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 08:55:55,101 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 08:55:55,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:55:55,253 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:55:55,253 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 155 treesize of output 175 [2023-08-24 08:55:55,723 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:55,723 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:55:55,967 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 08:55:55,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077406174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:55:55,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:55:55,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 30 [2023-08-24 08:55:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75515530] [2023-08-24 08:55:55,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:55:55,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-24 08:55:55,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:55:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-24 08:55:55,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-08-24 08:55:55,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:55:55,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 685 places, 1217 transitions, 25569 flow. Second operand has 32 states, 32 states have (on average 203.21875) internal successors, (6503), 32 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:55:55,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:55:55,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:55:55,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:56:03,171 INFO L124 PetriNetUnfolderBase]: 11368/16616 cut-off events. [2023-08-24 08:56:03,171 INFO L125 PetriNetUnfolderBase]: For 717207/717207 co-relation queries the response was YES. [2023-08-24 08:56:03,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139648 conditions, 16616 events. 11368/16616 cut-off events. For 717207/717207 co-relation queries the response was YES. Maximal size of possible extension queue 884. Compared 100287 event pairs, 3862 based on Foata normal form. 1/16617 useless extension candidates. Maximal degree in co-relation 139317. Up to 16031 conditions per place. [2023-08-24 08:56:03,498 INFO L140 encePairwiseOnDemand]: 681/695 looper letters, 1032 selfloop transitions, 217 changer transitions 1/1250 dead transitions. [2023-08-24 08:56:03,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 699 places, 1250 transitions, 28767 flow [2023-08-24 08:56:03,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 08:56:03,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 08:56:03,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 3101 transitions. [2023-08-24 08:56:03,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2974580335731415 [2023-08-24 08:56:03,500 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 3101 transitions. [2023-08-24 08:56:03,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 3101 transitions. [2023-08-24 08:56:03,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:56:03,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 3101 transitions. [2023-08-24 08:56:03,502 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 08:56:03,506 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 08:56:03,507 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 08:56:03,507 INFO L175 Difference]: Start difference. First operand has 685 places, 1217 transitions, 25569 flow. Second operand 15 states and 3101 transitions. [2023-08-24 08:56:03,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 699 places, 1250 transitions, 28767 flow [2023-08-24 08:56:08,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 1250 transitions, 27971 flow, removed 233 selfloop flow, removed 7 redundant places. [2023-08-24 08:56:08,393 INFO L231 Difference]: Finished difference. Result has 695 places, 1224 transitions, 25750 flow [2023-08-24 08:56:08,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=24773, PETRI_DIFFERENCE_MINUEND_PLACES=678, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1000, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=25750, PETRI_PLACES=695, PETRI_TRANSITIONS=1224} [2023-08-24 08:56:08,394 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 663 predicate places. [2023-08-24 08:56:08,394 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1224 transitions, 25750 flow [2023-08-24 08:56:08,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 203.21875) internal successors, (6503), 32 states have internal predecessors, (6503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:08,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:56:08,395 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 08:56:08,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2023-08-24 08:56:08,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2023-08-24 08:56:08,600 INFO L420 AbstractCegarLoop]: === Iteration 99 === 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 08:56:08,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:56:08,601 INFO L85 PathProgramCache]: Analyzing trace with hash 537542201, now seen corresponding path program 92 times [2023-08-24 08:56:08,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:56:08,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338274525] [2023-08-24 08:56:08,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:56:08,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:56:08,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:56:09,089 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 08:56:09,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:56:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338274525] [2023-08-24 08:56:09,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338274525] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:56:09,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593990800] [2023-08-24 08:56:09,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 08:56:09,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:56:09,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:56:09,091 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:56:09,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2023-08-24 08:56:09,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:56:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:56:09,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 08:56:09,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:56:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:56:09,586 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 08:56:09,733 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:09,733 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 08:56:09,751 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 08:56:09,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:56:09,925 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_6582 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6582) c_~B~0.base) c_~B~0.offset) c_~csum~0) .cse0)) (forall ((v_ArrVal_6582 (Array Int Int))) (<= .cse0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6582) c_~B~0.base) c_~B~0.offset) c_~csum~0))))) is different from false [2023-08-24 08:56:09,931 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:09,931 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 08:56:09,933 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 08:56:09,941 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:56:10,049 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 08:56:10,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593990800] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:56:10,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:56:10,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-24 08:56:10,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432367591] [2023-08-24 08:56:10,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:56:10,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 08:56:10,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:56:10,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 08:56:10,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=597, Unknown=1, NotChecked=50, Total=756 [2023-08-24 08:56:10,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 08:56:10,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1224 transitions, 25750 flow. Second operand has 28 states, 28 states have (on average 230.57142857142858) internal successors, (6456), 28 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:10,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:56:10,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 08:56:10,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:56:17,182 INFO L124 PetriNetUnfolderBase]: 11458/16749 cut-off events. [2023-08-24 08:56:17,183 INFO L125 PetriNetUnfolderBase]: For 731995/731995 co-relation queries the response was YES. [2023-08-24 08:56:17,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140682 conditions, 16749 events. 11458/16749 cut-off events. For 731995/731995 co-relation queries the response was YES. Maximal size of possible extension queue 890. Compared 101080 event pairs, 3489 based on Foata normal form. 1/16750 useless extension candidates. Maximal degree in co-relation 140349. Up to 15937 conditions per place. [2023-08-24 08:56:17,532 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 1018 selfloop transitions, 243 changer transitions 1/1262 dead transitions. [2023-08-24 08:56:17,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 1262 transitions, 29033 flow [2023-08-24 08:56:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:56:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:56:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2143 transitions. [2023-08-24 08:56:17,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3426059152677858 [2023-08-24 08:56:17,534 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2143 transitions. [2023-08-24 08:56:17,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2143 transitions. [2023-08-24 08:56:17,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:56:17,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2143 transitions. [2023-08-24 08:56:17,536 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 08:56:17,538 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 08:56:17,539 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 08:56:17,539 INFO L175 Difference]: Start difference. First operand has 695 places, 1224 transitions, 25750 flow. Second operand 9 states and 2143 transitions. [2023-08-24 08:56:17,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 1262 transitions, 29033 flow [2023-08-24 08:56:22,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 693 places, 1262 transitions, 28236 flow, removed 226 selfloop flow, removed 10 redundant places. [2023-08-24 08:56:22,573 INFO L231 Difference]: Finished difference. Result has 695 places, 1230 transitions, 25966 flow [2023-08-24 08:56:22,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=24953, PETRI_DIFFERENCE_MINUEND_PLACES=685, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=981, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=25966, PETRI_PLACES=695, PETRI_TRANSITIONS=1230} [2023-08-24 08:56:22,574 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 663 predicate places. [2023-08-24 08:56:22,574 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1230 transitions, 25966 flow [2023-08-24 08:56:22,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 230.57142857142858) internal successors, (6456), 28 states have internal predecessors, (6456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:22,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:56:22,575 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 08:56:22,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2023-08-24 08:56:22,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2023-08-24 08:56:22,783 INFO L420 AbstractCegarLoop]: === Iteration 100 === 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 08:56:22,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:56:22,783 INFO L85 PathProgramCache]: Analyzing trace with hash 948930055, now seen corresponding path program 93 times [2023-08-24 08:56:22,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:56:22,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734867492] [2023-08-24 08:56:22,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:56:22,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:56:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:56:23,259 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 08:56:23,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:56:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734867492] [2023-08-24 08:56:23,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734867492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:56:23,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055462111] [2023-08-24 08:56:23,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 08:56:23,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:56:23,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:56:23,261 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:56:23,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2023-08-24 08:56:23,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 08:56:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:56:23,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-24 08:56:23,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:56:23,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 08:56:23,763 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 08:56:23,895 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:23,895 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 08:56:23,907 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 08:56:23,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:56:24,049 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~asum~0 c_~bsum~0))) (and (forall ((v_ArrVal_6649 (Array Int Int))) (<= (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6649) c_~B~0.base) c_~B~0.offset)) .cse0)) (forall ((v_ArrVal_6649 (Array Int Int))) (<= .cse0 (+ c_~csum~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_6649) c_~B~0.base) c_~B~0.offset)))))) is different from false [2023-08-24 08:56:24,055 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:24,055 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 08:56:24,058 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 08:56:24,063 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:56:24,174 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 08:56:24,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055462111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:56:24,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:56:24,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-08-24 08:56:24,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77713824] [2023-08-24 08:56:24,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:56:24,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 08:56:24,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:56:24,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 08:56:24,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=511, Unknown=1, NotChecked=46, Total=650 [2023-08-24 08:56:24,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 695 [2023-08-24 08:56:24,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1230 transitions, 25966 flow. Second operand has 26 states, 26 states have (on average 230.6153846153846) internal successors, (5996), 26 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:24,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:56:24,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 695 [2023-08-24 08:56:24,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:56:31,261 INFO L124 PetriNetUnfolderBase]: 11518/16838 cut-off events. [2023-08-24 08:56:31,262 INFO L125 PetriNetUnfolderBase]: For 741172/741172 co-relation queries the response was YES. [2023-08-24 08:56:31,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141711 conditions, 16838 events. 11518/16838 cut-off events. For 741172/741172 co-relation queries the response was YES. Maximal size of possible extension queue 894. Compared 101584 event pairs, 3506 based on Foata normal form. 1/16839 useless extension candidates. Maximal degree in co-relation 141379. Up to 16026 conditions per place. [2023-08-24 08:56:31,593 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 1020 selfloop transitions, 245 changer transitions 1/1266 dead transitions. [2023-08-24 08:56:31,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 1266 transitions, 29253 flow [2023-08-24 08:56:31,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:56:31,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:56:31,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2141 transitions. [2023-08-24 08:56:31,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34228617106314946 [2023-08-24 08:56:31,595 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2141 transitions. [2023-08-24 08:56:31,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2141 transitions. [2023-08-24 08:56:31,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:56:31,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2141 transitions. [2023-08-24 08:56:31,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 237.88888888888889) internal successors, (2141), 9 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:31,599 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 08:56:31,599 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 08:56:31,600 INFO L175 Difference]: Start difference. First operand has 695 places, 1230 transitions, 25966 flow. Second operand 9 states and 2141 transitions. [2023-08-24 08:56:31,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 1266 transitions, 29253 flow [2023-08-24 08:56:35,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1266 transitions, 28423 flow, removed 229 selfloop flow, removed 5 redundant places. [2023-08-24 08:56:35,257 INFO L231 Difference]: Finished difference. Result has 700 places, 1235 transitions, 26154 flow [2023-08-24 08:56:35,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=25142, PETRI_DIFFERENCE_MINUEND_PLACES=690, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=985, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26154, PETRI_PLACES=700, PETRI_TRANSITIONS=1235} [2023-08-24 08:56:35,257 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 668 predicate places. [2023-08-24 08:56:35,257 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 1235 transitions, 26154 flow [2023-08-24 08:56:35,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 230.6153846153846) internal successors, (5996), 26 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:35,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:56:35,258 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 08:56:35,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2023-08-24 08:56:35,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2023-08-24 08:56:35,458 INFO L420 AbstractCegarLoop]: === Iteration 101 === 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 08:56:35,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:56:35,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1759948135, now seen corresponding path program 94 times [2023-08-24 08:56:35,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:56:35,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538035244] [2023-08-24 08:56:35,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:56:35,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:56:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:56:35,891 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 08:56:35,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:56:35,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538035244] [2023-08-24 08:56:35,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538035244] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:56:35,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547271268] [2023-08-24 08:56:35,891 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 08:56:35,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:56:35,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:56:35,892 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:56:35,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2023-08-24 08:56:36,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 08:56:36,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:56:36,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-24 08:56:36,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:56:36,446 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:36,447 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 08:56:36,458 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 08:56:36,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:56:36,557 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:36,557 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 08:56:36,651 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:56:36,651 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 08:56:36,734 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 08:56:36,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547271268] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:56:36,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:56:36,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 15 [2023-08-24 08:56:36,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517870967] [2023-08-24 08:56:36,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:56:36,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-24 08:56:36,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:56:36,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-24 08:56:36,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-24 08:56:36,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 695 [2023-08-24 08:56:36,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 1235 transitions, 26154 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 08:56:36,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:56:36,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 695 [2023-08-24 08:56:36,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 08:56:43,623 INFO L124 PetriNetUnfolderBase]: 11578/16927 cut-off events. [2023-08-24 08:56:43,623 INFO L125 PetriNetUnfolderBase]: For 742219/742219 co-relation queries the response was YES. [2023-08-24 08:56:43,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142429 conditions, 16927 events. 11578/16927 cut-off events. For 742219/742219 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 102265 event pairs, 4370 based on Foata normal form. 1/16928 useless extension candidates. Maximal degree in co-relation 142095. Up to 16518 conditions per place. [2023-08-24 08:56:43,972 INFO L140 encePairwiseOnDemand]: 687/695 looper letters, 1095 selfloop transitions, 170 changer transitions 1/1266 dead transitions. [2023-08-24 08:56:43,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 1266 transitions, 29387 flow [2023-08-24 08:56:43,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 08:56:43,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 08:56:43,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2223 transitions. [2023-08-24 08:56:43,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3553956834532374 [2023-08-24 08:56:43,974 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2223 transitions. [2023-08-24 08:56:43,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2223 transitions. [2023-08-24 08:56:43,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 08:56:43,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2223 transitions. [2023-08-24 08:56:43,976 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.0) internal successors, (2223), 9 states have internal predecessors, (2223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 08:56:43,978 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 08:56:43,978 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 08:56:43,978 INFO L175 Difference]: Start difference. First operand has 700 places, 1235 transitions, 26154 flow. Second operand 9 states and 2223 transitions. [2023-08-24 08:56:43,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 1266 transitions, 29387 flow [2023-08-24 08:56:47,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 1266 transitions, 28449 flow, removed 232 selfloop flow, removed 6 redundant places. [2023-08-24 08:56:47,840 INFO L231 Difference]: Finished difference. Result has 704 places, 1240 transitions, 26082 flow [2023-08-24 08:56:47,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=695, PETRI_DIFFERENCE_MINUEND_FLOW=25222, PETRI_DIFFERENCE_MINUEND_PLACES=694, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26082, PETRI_PLACES=704, PETRI_TRANSITIONS=1240} [2023-08-24 08:56:47,841 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 672 predicate places. [2023-08-24 08:56:47,841 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 1240 transitions, 26082 flow [2023-08-24 08:56:47,841 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 08:56:47,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 08:56:47,841 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 08:56:47,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2023-08-24 08:56:48,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:56:48,042 INFO L420 AbstractCegarLoop]: === Iteration 102 === 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 08:56:48,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 08:56:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1911985751, now seen corresponding path program 95 times [2023-08-24 08:56:48,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 08:56:48,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506776282] [2023-08-24 08:56:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 08:56:48,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 08:56:48,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 08:56:48,939 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 08:56:48,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 08:56:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506776282] [2023-08-24 08:56:48,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506776282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 08:56:48,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903440048] [2023-08-24 08:56:48,940 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 08:56:48,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 08:56:48,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 08:56:48,941 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 08:56:48,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2023-08-24 08:56:49,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 08:56:49,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 08:56:49,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-24 08:56:49,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 08:56:49,311 INFO L322 Elim1Store]: treesize reduction 72, result has 33.9 percent of original size [2023-08-24 08:56:49,311 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 08:56:49,345 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-24 08:56:49,345 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 08:56:49,384 INFO L322 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2023-08-24 08:56:49,385 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 16 treesize of output 18 [2023-08-24 08:56:49,595 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-24 08:56:49,595 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 08:56:49,707 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:49,707 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 27 [2023-08-24 08:56:49,734 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 08:56:49,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 08:56:49,843 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 08:56:49,844 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 08:56:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:56:50,284 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 08:56:50,305 INFO L322 Elim1Store]: treesize reduction 57, result has 32.9 percent of original size [2023-08-24 08:56:50,305 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 38 [2023-08-24 08:56:50,592 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 08:56:50,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903440048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 08:56:50,592 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 08:56:50,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 10] total 31 [2023-08-24 08:56:50,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035714346] [2023-08-24 08:56:50,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 08:56:50,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 08:56:50,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 08:56:50,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 08:56:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=900, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 08:56:50,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 695 [2023-08-24 08:56:50,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 1240 transitions, 26082 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 08:56:50,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 08:56:50,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 695 [2023-08-24 08:56:50,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-24 08:56:55,349 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 08:56:55,349 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 08:56:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 08:56:55,486 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-08-24 08:56:55,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2023-08-24 08:56:55,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2023-08-24 08:56:55,692 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 201/695 universal loopers) in iteration 102,while PetriNetUnfolder was constructing finite prefix that currently has 101975 conditions, 10233 events (7422/10232 cut-off events. For 510893/510893 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 57499 event pairs, 2394 based on Foata normal form. 0/11010 useless extension candidates. Maximal degree in co-relation 101639. Up to 9884 conditions per place.). [2023-08-24 08:56:55,694 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-24 08:56:55,694 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-24 08:56:55,694 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-24 08:56:55,694 INFO L445 BasicCegarLoop]: Path program histogram: [95, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 08:56:55,696 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 08:56:55,696 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 08:56:55,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 08:56:55 BasicIcfg [2023-08-24 08:56:55,697 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 08:56:55,697 INFO L158 Benchmark]: Toolchain (without parser) took 777069.28ms. Allocated memory was 352.3MB in the beginning and 14.0GB in the end (delta: 13.6GB). Free memory was 328.1MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 9.5GB. Max. memory is 16.0GB. [2023-08-24 08:56:55,697 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 352.3MB. Free memory was 329.2MB in the beginning and 329.2MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 08:56:55,697 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.72ms. Allocated memory is still 352.3MB. Free memory was 328.1MB in the beginning and 316.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 08:56:55,698 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.38ms. Allocated memory is still 352.3MB. Free memory was 316.3MB in the beginning and 313.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:56:55,698 INFO L158 Benchmark]: Boogie Preprocessor took 45.59ms. Allocated memory is still 352.3MB. Free memory was 313.8MB in the beginning and 311.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 08:56:55,698 INFO L158 Benchmark]: RCFGBuilder took 504.38ms. Allocated memory is still 352.3MB. Free memory was 311.4MB in the beginning and 286.6MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-24 08:56:55,698 INFO L158 Benchmark]: TraceAbstraction took 776239.32ms. Allocated memory was 352.3MB in the beginning and 14.0GB in the end (delta: 13.6GB). Free memory was 286.1MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 9.4GB. Max. memory is 16.0GB. [2023-08-24 08:56:55,698 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 352.3MB. Free memory was 329.2MB in the beginning and 329.2MB in the end (delta: 73.5kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 227.72ms. Allocated memory is still 352.3MB. Free memory was 328.1MB in the beginning and 316.3MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.38ms. Allocated memory is still 352.3MB. Free memory was 316.3MB in the beginning and 313.8MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 45.59ms. Allocated memory is still 352.3MB. Free memory was 313.8MB in the beginning and 311.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 504.38ms. Allocated memory is still 352.3MB. Free memory was 311.4MB in the beginning and 286.6MB in the end (delta: 24.8MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 776239.32ms. Allocated memory was 352.3MB in the beginning and 14.0GB in the end (delta: 13.6GB). Free memory was 286.1MB in the beginning and 4.6GB in the end (delta: -4.3GB). Peak memory consumption was 9.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.5s, 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 enhancing Floyd-Hoare automaton (33states, 201/695 universal loopers) in iteration 102,while PetriNetUnfolder was constructing finite prefix that currently has 101975 conditions, 10233 events (7422/10232 cut-off events. For 510893/510893 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 57499 event pairs, 2394 based on Foata normal form. 0/11010 useless extension candidates. Maximal degree in co-relation 101639. Up to 9884 conditions per place.). - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 201/695 universal loopers) in iteration 102,while PetriNetUnfolder was constructing finite prefix that currently has 101975 conditions, 10233 events (7422/10232 cut-off events. For 510893/510893 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 57499 event pairs, 2394 based on Foata normal form. 0/11010 useless extension candidates. Maximal degree in co-relation 101639. Up to 9884 conditions per place.). - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (33states, 201/695 universal loopers) in iteration 102,while PetriNetUnfolder was constructing finite prefix that currently has 101975 conditions, 10233 events (7422/10232 cut-off events. For 510893/510893 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 57499 event pairs, 2394 based on Foata normal form. 0/11010 useless extension candidates. Maximal degree in co-relation 101639. Up to 9884 conditions per place.). - 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 enhancing Floyd-Hoare automaton (33states, 201/695 universal loopers) in iteration 102,while PetriNetUnfolder was constructing finite prefix that currently has 101975 conditions, 10233 events (7422/10232 cut-off events. For 510893/510893 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 57499 event pairs, 2394 based on Foata normal form. 0/11010 useless extension candidates. Maximal degree in co-relation 101639. Up to 9884 conditions per place.). - 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: 776.1s, OverallIterations: 102, TraceHistogramMax: 1, PathProgramHistogramMax: 95, EmptinessCheckTime: 0.0s, AutomataDifference: 474.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9178 SdHoareTripleChecker+Valid, 41.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9178 mSDsluCounter, 5813 SdHoareTripleChecker+Invalid, 36.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3013 IncrementalHoareTripleChecker+Unchecked, 5117 mSDsCounter, 811 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 73468 IncrementalHoareTripleChecker+Invalid, 77292 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 811 mSolverCounterUnsat, 696 mSDtfsCounter, 73468 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6975 GetRequests, 3844 SyntacticMatches, 227 SemanticMatches, 2904 ConstructedPredicates, 31 IntricatePredicates, 3 DeprecatedPredicates, 25040 ImplicationChecksByTransitivity, 106.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26154occurred in iteration=100, InterpolantAutomatonStates: 1132, 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: 1.7s SsaConstructionTime, 7.0s SatisfiabilityAnalysisTime, 248.6s InterpolantComputationTime, 5569 NumberOfCodeBlocks, 5569 NumberOfCodeBlocksAsserted, 300 NumberOfCheckSat, 8010 ConstructedInterpolants, 615 QuantifiedInterpolants, 195722 SizeOfPredicates, 2640 NumberOfNonLiveVariables, 36137 ConjunctsInSsa, 8066 ConjunctsInUnsatCore, 298 InterpolantComputations, 7 PerfectInterpolantSequences, 834/1752 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