/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-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 10:05:09,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 10:05:09,700 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 10:05:09,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 10:05:09,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 10:05:09,734 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 10:05:09,734 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 10:05:09,735 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 10:05:09,735 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 10:05:09,739 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 10:05:09,739 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 10:05:09,740 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 10:05:09,740 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 10:05:09,741 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 10:05:09,741 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 10:05:09,741 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 10:05:09,742 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 10:05:09,742 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 10:05:09,742 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 10:05:09,742 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 10:05:09,742 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 10:05:09,743 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 10:05:09,743 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 10:05:09,743 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 10:05:09,743 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 10:05:09,744 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 10:05:09,744 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 10:05:09,744 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:05:09,744 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 10:05:09,744 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 10:05:09,745 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 10:05:09,745 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 10:05:09,745 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 10:05:09,745 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 10:05:09,745 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 10:05:09,745 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 10:05:10,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 10:05:10,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 10:05:10,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 10:05:10,041 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 10:05:10,041 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 10:05:10,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-24 10:05:11,208 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 10:05:11,432 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 10:05:11,433 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-24 10:05:11,438 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a23158cf/9c238b00003d424389d01df701cfb05d/FLAGc24f8d3a5 [2023-08-24 10:05:11,448 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a23158cf/9c238b00003d424389d01df701cfb05d [2023-08-24 10:05:11,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 10:05:11,451 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 10:05:11,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 10:05:11,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 10:05:11,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 10:05:11,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cc0a782 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11, skipping insertion in model container [2023-08-24 10:05:11,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,473 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 10:05:11,621 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-send-receive-alt.wvr.c[2650,2663] [2023-08-24 10:05:11,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:05:11,642 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 10:05:11,675 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-send-receive-alt.wvr.c[2650,2663] [2023-08-24 10:05:11,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 10:05:11,684 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 10:05:11,684 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 10:05:11,690 INFO L206 MainTranslator]: Completed translation [2023-08-24 10:05:11,691 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11 WrapperNode [2023-08-24 10:05:11,691 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 10:05:11,692 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 10:05:11,692 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 10:05:11,692 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 10:05:11,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,711 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,742 INFO L138 Inliner]: procedures = 24, calls = 37, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 148 [2023-08-24 10:05:11,743 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 10:05:11,744 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 10:05:11,744 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 10:05:11,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 10:05:11,751 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,751 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,765 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,765 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,770 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,773 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,774 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,775 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,787 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 10:05:11,788 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 10:05:11,788 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 10:05:11,788 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 10:05:11,789 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (1/1) ... [2023-08-24 10:05:11,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 10:05:11,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:11,821 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 10:05:11,842 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 10:05:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 10:05:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 10:05:11,856 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 10:05:11,856 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 10:05:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 10:05:11,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 10:05:11,857 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 10:05:11,858 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 10:05:11,860 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 10:05:11,969 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 10:05:11,970 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 10:05:12,245 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 10:05:12,321 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 10:05:12,322 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-24 10:05:12,324 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:05:12 BoogieIcfgContainer [2023-08-24 10:05:12,324 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 10:05:12,326 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 10:05:12,326 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 10:05:12,328 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 10:05:12,328 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 10:05:11" (1/3) ... [2023-08-24 10:05:12,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cf8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:05:12, skipping insertion in model container [2023-08-24 10:05:12,329 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 10:05:11" (2/3) ... [2023-08-24 10:05:12,329 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12cf8de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 10:05:12, skipping insertion in model container [2023-08-24 10:05:12,330 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 10:05:12" (3/3) ... [2023-08-24 10:05:12,330 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-24 10:05:12,343 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 10:05:12,343 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 10:05:12,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 10:05:12,386 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 10:05:12,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 124 places, 128 transitions, 272 flow [2023-08-24 10:05:12,495 INFO L124 PetriNetUnfolderBase]: 11/126 cut-off events. [2023-08-24 10:05:12,496 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:05:12,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 11/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 92 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 10:05:12,501 INFO L82 GeneralOperation]: Start removeDead. Operand has 124 places, 128 transitions, 272 flow [2023-08-24 10:05:12,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 118 transitions, 248 flow [2023-08-24 10:05:12,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 10:05:12,526 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-24 10:05:12,530 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 114 places, 118 transitions, 248 flow [2023-08-24 10:05:12,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 114 places, 118 transitions, 248 flow [2023-08-24 10:05:12,578 INFO L124 PetriNetUnfolderBase]: 11/118 cut-off events. [2023-08-24 10:05:12,578 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:05:12,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 118 events. 11/118 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 91 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 82. Up to 2 conditions per place. [2023-08-24 10:05:12,580 INFO L119 LiptonReduction]: Number of co-enabled transitions 792 [2023-08-24 10:05:16,529 INFO L134 LiptonReduction]: Checked pairs total: 860 [2023-08-24 10:05:16,529 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-24 10:05:16,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 10:05:16,544 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;@5fffa14b, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 10:05:16,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 10:05:16,549 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 10:05:16,549 INFO L124 PetriNetUnfolderBase]: 3/15 cut-off events. [2023-08-24 10:05:16,549 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 10:05:16,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:16,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:16,550 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:16,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1271432657, now seen corresponding path program 1 times [2023-08-24 10:05:16,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:16,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865609868] [2023-08-24 10:05:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:16,936 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 10:05:16,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:16,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865609868] [2023-08-24 10:05:16,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865609868] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:05:16,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:05:16,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 10:05:16,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281242908] [2023-08-24 10:05:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:05:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 10:05:16,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:16,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 10:05:16,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 10:05:16,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 252 [2023-08-24 10:05:16,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:16,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:16,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 252 [2023-08-24 10:05:16,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:17,041 INFO L124 PetriNetUnfolderBase]: 64/113 cut-off events. [2023-08-24 10:05:17,042 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-24 10:05:17,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246 conditions, 113 events. 64/113 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 329 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 162. Up to 66 conditions per place. [2023-08-24 10:05:17,043 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 19 selfloop transitions, 2 changer transitions 4/26 dead transitions. [2023-08-24 10:05:17,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 26 transitions, 123 flow [2023-08-24 10:05:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 10:05:17,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 10:05:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-24 10:05:17,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4748677248677249 [2023-08-24 10:05:17,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-24 10:05:17,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-24 10:05:17,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:17,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-24 10:05:17,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,069 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 44 flow. Second operand 3 states and 359 transitions. [2023-08-24 10:05:17,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 26 transitions, 123 flow [2023-08-24 10:05:17,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 26 transitions, 109 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 10:05:17,072 INFO L231 Difference]: Finished difference. Result has 19 places, 17 transitions, 48 flow [2023-08-24 10:05:17,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=17} [2023-08-24 10:05:17,076 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 10:05:17,076 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 17 transitions, 48 flow [2023-08-24 10:05:17,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:17,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:17,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 10:05:17,077 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:17,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:17,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1087178636, now seen corresponding path program 1 times [2023-08-24 10:05:17,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:17,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180953777] [2023-08-24 10:05:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:17,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:17,217 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 10:05:17,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180953777] [2023-08-24 10:05:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180953777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:05:17,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:05:17,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-24 10:05:17,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124610495] [2023-08-24 10:05:17,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:05:17,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 10:05:17,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:17,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 10:05:17,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 10:05:17,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 252 [2023-08-24 10:05:17,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 17 transitions, 48 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:17,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 252 [2023-08-24 10:05:17,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:17,259 INFO L124 PetriNetUnfolderBase]: 48/96 cut-off events. [2023-08-24 10:05:17,259 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-24 10:05:17,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 96 events. 48/96 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 231 event pairs, 15 based on Foata normal form. 6/81 useless extension candidates. Maximal degree in co-relation 123. Up to 66 conditions per place. [2023-08-24 10:05:17,260 INFO L140 encePairwiseOnDemand]: 249/252 looper letters, 16 selfloop transitions, 2 changer transitions 5/24 dead transitions. [2023-08-24 10:05:17,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 24 transitions, 110 flow [2023-08-24 10:05:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 10:05:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 10:05:17,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 338 transitions. [2023-08-24 10:05:17,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2023-08-24 10:05:17,262 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 338 transitions. [2023-08-24 10:05:17,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 338 transitions. [2023-08-24 10:05:17,263 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:17,263 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 338 transitions. [2023-08-24 10:05:17,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,267 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 252.0) internal successors, (1008), 4 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,267 INFO L175 Difference]: Start difference. First operand has 19 places, 17 transitions, 48 flow. Second operand 3 states and 338 transitions. [2023-08-24 10:05:17,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 24 transitions, 110 flow [2023-08-24 10:05:17,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 24 transitions, 108 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 10:05:17,268 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 58 flow [2023-08-24 10:05:17,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-24 10:05:17,269 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 1 predicate places. [2023-08-24 10:05:17,269 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 58 flow [2023-08-24 10:05:17,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:17,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:17,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 10:05:17,270 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:17,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:17,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1050120391, now seen corresponding path program 1 times [2023-08-24 10:05:17,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:17,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044835943] [2023-08-24 10:05:17,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:17,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:17,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:17,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:17,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044835943] [2023-08-24 10:05:17,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044835943] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 10:05:17,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 10:05:17,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 10:05:17,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318895714] [2023-08-24 10:05:17,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 10:05:17,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 10:05:17,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:17,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 10:05:17,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 10:05:17,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 252 [2023-08-24 10:05:17,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:17,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 252 [2023-08-24 10:05:17,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:17,431 INFO L124 PetriNetUnfolderBase]: 57/126 cut-off events. [2023-08-24 10:05:17,432 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-24 10:05:17,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 57/126 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 390 event pairs, 40 based on Foata normal form. 4/126 useless extension candidates. Maximal degree in co-relation 202. Up to 95 conditions per place. [2023-08-24 10:05:17,433 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 16 selfloop transitions, 2 changer transitions 10/29 dead transitions. [2023-08-24 10:05:17,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 29 transitions, 140 flow [2023-08-24 10:05:17,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 10:05:17,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 10:05:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 415 transitions. [2023-08-24 10:05:17,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4117063492063492 [2023-08-24 10:05:17,435 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 415 transitions. [2023-08-24 10:05:17,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 415 transitions. [2023-08-24 10:05:17,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:17,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 415 transitions. [2023-08-24 10:05:17,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 103.75) internal successors, (415), 4 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,440 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 252.0) internal successors, (1260), 5 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,440 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 58 flow. Second operand 4 states and 415 transitions. [2023-08-24 10:05:17,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 29 transitions, 140 flow [2023-08-24 10:05:17,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 29 transitions, 138 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 10:05:17,442 INFO L231 Difference]: Finished difference. Result has 25 places, 19 transitions, 70 flow [2023-08-24 10:05:17,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=70, PETRI_PLACES=25, PETRI_TRANSITIONS=19} [2023-08-24 10:05:17,443 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-08-24 10:05:17,443 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 19 transitions, 70 flow [2023-08-24 10:05:17,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:17,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:17,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:17,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 10:05:17,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:17,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:17,444 INFO L85 PathProgramCache]: Analyzing trace with hash -278733434, now seen corresponding path program 1 times [2023-08-24 10:05:17,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:17,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846463769] [2023-08-24 10:05:17,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:17,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:17,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:18,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:18,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846463769] [2023-08-24 10:05:18,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846463769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:18,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135025821] [2023-08-24 10:05:18,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:18,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:18,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:18,240 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 10:05:18,262 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 10:05:18,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:18,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-24 10:05:18,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:18,434 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 15 treesize of output 11 [2023-08-24 10:05:18,482 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 10:05:18,524 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 10:05:18,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:18,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:19,000 WARN L839 $PredicateComparison]: unable to prove that (or (<= c_~n~0 c_~back~0) (let ((.cse2 (+ (* c_~back~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse1 (+ (* c_~front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (<= (+ c_~sum~0 (select .cse0 .cse1)) 1) (not (= (select .cse0 .cse2) 1))))) (forall ((v_ArrVal_73 (Array Int Int)) (v_ArrVal_72 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_72) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_73) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (or (not (= (select .cse3 .cse2) 1)) (<= 0 (+ c_~sum~0 (select .cse3 .cse1)))))))) (< |c_ULTIMATE.start_create_fresh_int_array_~i~0#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) (< c_~back~0 0)) is different from false [2023-08-24 10:05:19,032 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:19,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-24 10:05:19,050 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:19,051 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 316 treesize of output 292 [2023-08-24 10:05:19,071 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:19,072 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 92 [2023-08-24 10:05:19,085 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:19,085 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 95 treesize of output 79 [2023-08-24 10:05:19,276 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:19,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-24 10:05:19,287 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 10:05:19,289 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 148 treesize of output 136 [2023-08-24 10:05:19,304 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 10:05:19,304 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 132 treesize of output 112 [2023-08-24 10:05:19,318 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-24 10:05:19,319 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 83 treesize of output 75 [2023-08-24 10:05:19,369 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:05:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-24 10:05:19,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135025821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:19,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:19,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 10:05:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671815127] [2023-08-24 10:05:19,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:05:19,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:19,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:05:19,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=332, Unknown=3, NotChecked=38, Total=462 [2023-08-24 10:05:19,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:05:19,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 19 transitions, 70 flow. Second operand has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:19,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:19,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:05:19,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:21,217 INFO L124 PetriNetUnfolderBase]: 261/507 cut-off events. [2023-08-24 10:05:21,218 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-08-24 10:05:21,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222 conditions, 507 events. 261/507 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2265 event pairs, 30 based on Foata normal form. 5/508 useless extension candidates. Maximal degree in co-relation 1206. Up to 114 conditions per place. [2023-08-24 10:05:21,221 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 58 selfloop transitions, 29 changer transitions 58/145 dead transitions. [2023-08-24 10:05:21,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 145 transitions, 713 flow [2023-08-24 10:05:21,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 10:05:21,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 10:05:21,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1758 transitions. [2023-08-24 10:05:21,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3033126293995859 [2023-08-24 10:05:21,227 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1758 transitions. [2023-08-24 10:05:21,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1758 transitions. [2023-08-24 10:05:21,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:21,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1758 transitions. [2023-08-24 10:05:21,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 76.43478260869566) internal successors, (1758), 23 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:21,240 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 252.0) internal successors, (6048), 24 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:21,241 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 252.0) internal successors, (6048), 24 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:21,241 INFO L175 Difference]: Start difference. First operand has 25 places, 19 transitions, 70 flow. Second operand 23 states and 1758 transitions. [2023-08-24 10:05:21,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 145 transitions, 713 flow [2023-08-24 10:05:21,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 145 transitions, 701 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 10:05:21,245 INFO L231 Difference]: Finished difference. Result has 53 places, 46 transitions, 285 flow [2023-08-24 10:05:21,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=285, PETRI_PLACES=53, PETRI_TRANSITIONS=46} [2023-08-24 10:05:21,246 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 33 predicate places. [2023-08-24 10:05:21,246 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 46 transitions, 285 flow [2023-08-24 10:05:21,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 71.95454545454545) internal successors, (1583), 22 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:21,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:21,247 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:21,255 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 10:05:21,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:21,453 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:21,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1005614065, now seen corresponding path program 2 times [2023-08-24 10:05:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:21,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578908264] [2023-08-24 10:05:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:21,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:21,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578908264] [2023-08-24 10:05:21,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578908264] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:21,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685449923] [2023-08-24 10:05:21,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:05:21,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:21,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:21,662 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 10:05:21,665 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 10:05:21,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:05:21,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:21,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-24 10:05:21,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:21,801 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 86 [2023-08-24 10:05:21,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:21,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:21,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 96 [2023-08-24 10:05:21,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:21,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685449923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:21,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:21,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 4] total 11 [2023-08-24 10:05:21,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871032543] [2023-08-24 10:05:21,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:21,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 10:05:21,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:21,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 10:05:21,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2023-08-24 10:05:21,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 252 [2023-08-24 10:05:21,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 46 transitions, 285 flow. Second operand has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:21,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:21,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 252 [2023-08-24 10:05:21,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:22,169 INFO L124 PetriNetUnfolderBase]: 357/707 cut-off events. [2023-08-24 10:05:22,170 INFO L125 PetriNetUnfolderBase]: For 1305/1307 co-relation queries the response was YES. [2023-08-24 10:05:22,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2288 conditions, 707 events. 357/707 cut-off events. For 1305/1307 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3549 event pairs, 80 based on Foata normal form. 24/713 useless extension candidates. Maximal degree in co-relation 1935. Up to 181 conditions per place. [2023-08-24 10:05:22,175 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 57 selfloop transitions, 23 changer transitions 5/89 dead transitions. [2023-08-24 10:05:22,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 656 flow [2023-08-24 10:05:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 10:05:22,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 10:05:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 901 transitions. [2023-08-24 10:05:22,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972663139329806 [2023-08-24 10:05:22,181 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 901 transitions. [2023-08-24 10:05:22,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 901 transitions. [2023-08-24 10:05:22,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:22,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 901 transitions. [2023-08-24 10:05:22,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 100.11111111111111) internal successors, (901), 9 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:22,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:22,187 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 252.0) internal successors, (2520), 10 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:22,187 INFO L175 Difference]: Start difference. First operand has 53 places, 46 transitions, 285 flow. Second operand 9 states and 901 transitions. [2023-08-24 10:05:22,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 656 flow [2023-08-24 10:05:22,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 89 transitions, 608 flow, removed 22 selfloop flow, removed 3 redundant places. [2023-08-24 10:05:22,197 INFO L231 Difference]: Finished difference. Result has 58 places, 52 transitions, 367 flow [2023-08-24 10:05:22,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=367, PETRI_PLACES=58, PETRI_TRANSITIONS=52} [2023-08-24 10:05:22,198 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-08-24 10:05:22,199 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 52 transitions, 367 flow [2023-08-24 10:05:22,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 96.16666666666667) internal successors, (1154), 12 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:22,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:22,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:22,211 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 10:05:22,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:22,405 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:22,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:22,406 INFO L85 PathProgramCache]: Analyzing trace with hash -210133493, now seen corresponding path program 3 times [2023-08-24 10:05:22,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:22,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998807316] [2023-08-24 10:05:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:22,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:22,542 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-24 10:05:22,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:22,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998807316] [2023-08-24 10:05:22,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998807316] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:22,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415060860] [2023-08-24 10:05:22,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:05:22,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:22,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:22,577 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 10:05:22,603 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 10:05:22,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 10:05:22,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:22,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 10:05:22,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:22,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:22,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415060860] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:22,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:22,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-24 10:05:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170188197] [2023-08-24 10:05:22,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:22,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 10:05:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 10:05:22,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-08-24 10:05:22,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 252 [2023-08-24 10:05:22,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 52 transitions, 367 flow. Second operand has 16 states, 16 states have (on average 95.6875) internal successors, (1531), 16 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:22,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:22,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 252 [2023-08-24 10:05:22,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:23,190 INFO L124 PetriNetUnfolderBase]: 229/473 cut-off events. [2023-08-24 10:05:23,191 INFO L125 PetriNetUnfolderBase]: For 1004/1006 co-relation queries the response was YES. [2023-08-24 10:05:23,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1575 conditions, 473 events. 229/473 cut-off events. For 1004/1006 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2205 event pairs, 148 based on Foata normal form. 12/468 useless extension candidates. Maximal degree in co-relation 1536. Up to 389 conditions per place. [2023-08-24 10:05:23,193 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 32 selfloop transitions, 3 changer transitions 25/63 dead transitions. [2023-08-24 10:05:23,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 451 flow [2023-08-24 10:05:23,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 10:05:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 10:05:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 694 transitions. [2023-08-24 10:05:23,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3934240362811791 [2023-08-24 10:05:23,196 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 694 transitions. [2023-08-24 10:05:23,196 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 694 transitions. [2023-08-24 10:05:23,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:23,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 694 transitions. [2023-08-24 10:05:23,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.14285714285714) internal successors, (694), 7 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:23,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:23,201 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 252.0) internal successors, (2016), 8 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:23,201 INFO L175 Difference]: Start difference. First operand has 58 places, 52 transitions, 367 flow. Second operand 7 states and 694 transitions. [2023-08-24 10:05:23,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 451 flow [2023-08-24 10:05:23,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 416 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-24 10:05:23,204 INFO L231 Difference]: Finished difference. Result has 52 places, 38 transitions, 228 flow [2023-08-24 10:05:23,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=228, PETRI_PLACES=52, PETRI_TRANSITIONS=38} [2023-08-24 10:05:23,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-08-24 10:05:23,205 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 38 transitions, 228 flow [2023-08-24 10:05:23,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 95.6875) internal successors, (1531), 16 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:23,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:23,206 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:23,214 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 10:05:23,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:23,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:23,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:23,412 INFO L85 PathProgramCache]: Analyzing trace with hash 794494887, now seen corresponding path program 4 times [2023-08-24 10:05:23,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:23,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195342975] [2023-08-24 10:05:23,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:23,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:24,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:24,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195342975] [2023-08-24 10:05:24,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195342975] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:24,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599929418] [2023-08-24 10:05:24,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:05:24,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:24,442 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 10:05:24,466 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 10:05:24,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:05:24,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:24,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 10:05:24,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:24,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:25,263 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 10:05:25,264 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 216 treesize of output 170 [2023-08-24 10:05:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599929418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:25,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:25,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 25 [2023-08-24 10:05:25,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977501445] [2023-08-24 10:05:25,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:25,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 10:05:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 10:05:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2023-08-24 10:05:25,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 10:05:25,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 38 transitions, 228 flow. Second operand has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:25,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:25,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 10:05:25,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:26,766 INFO L124 PetriNetUnfolderBase]: 364/719 cut-off events. [2023-08-24 10:05:26,767 INFO L125 PetriNetUnfolderBase]: For 823/823 co-relation queries the response was YES. [2023-08-24 10:05:26,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 719 events. 364/719 cut-off events. For 823/823 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3539 event pairs, 65 based on Foata normal form. 26/744 useless extension candidates. Maximal degree in co-relation 2134. Up to 186 conditions per place. [2023-08-24 10:05:26,770 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 67 selfloop transitions, 26 changer transitions 55/148 dead transitions. [2023-08-24 10:05:26,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 148 transitions, 903 flow [2023-08-24 10:05:26,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 10:05:26,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 10:05:26,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1681 transitions. [2023-08-24 10:05:26,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.333531746031746 [2023-08-24 10:05:26,777 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1681 transitions. [2023-08-24 10:05:26,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1681 transitions. [2023-08-24 10:05:26,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:26,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1681 transitions. [2023-08-24 10:05:26,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 84.05) internal successors, (1681), 20 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:26,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 252.0) internal successors, (5292), 21 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:26,789 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 252.0) internal successors, (5292), 21 states have internal predecessors, (5292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:26,790 INFO L175 Difference]: Start difference. First operand has 52 places, 38 transitions, 228 flow. Second operand 20 states and 1681 transitions. [2023-08-24 10:05:26,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 148 transitions, 903 flow [2023-08-24 10:05:26,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 148 transitions, 869 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-24 10:05:26,797 INFO L231 Difference]: Finished difference. Result has 66 places, 52 transitions, 417 flow [2023-08-24 10:05:26,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=417, PETRI_PLACES=66, PETRI_TRANSITIONS=52} [2023-08-24 10:05:26,798 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-08-24 10:05:26,798 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 52 transitions, 417 flow [2023-08-24 10:05:26,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 78.92592592592592) internal successors, (2131), 27 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:26,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:26,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:26,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 10:05:27,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:27,004 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:27,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:27,005 INFO L85 PathProgramCache]: Analyzing trace with hash -840518697, now seen corresponding path program 5 times [2023-08-24 10:05:27,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:27,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934648562] [2023-08-24 10:05:27,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:27,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:27,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:27,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934648562] [2023-08-24 10:05:27,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934648562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:27,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917335407] [2023-08-24 10:05:27,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:05:27,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:27,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:27,933 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 10:05:27,941 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 10:05:28,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:05:28,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:28,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-24 10:05:28,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:28,134 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 10:05:28,171 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 10:05:28,214 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 10:05:28,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:28,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:29,329 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:29,330 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-08-24 10:05:29,358 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-24 10:05:29,358 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 562 treesize of output 520 [2023-08-24 10:05:29,373 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:05:29,386 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:29,387 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 3 case distinctions, treesize of input 180 treesize of output 180 [2023-08-24 10:05:29,421 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-24 10:05:29,422 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 179 treesize of output 153 [2023-08-24 10:05:29,981 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:29,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-08-24 10:05:30,010 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 10:05:30,010 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 562 treesize of output 502 [2023-08-24 10:05:30,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:05:30,023 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:05:30,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:05:30,024 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 180 treesize of output 154 [2023-08-24 10:05:30,042 INFO L322 Elim1Store]: treesize reduction 28, result has 24.3 percent of original size [2023-08-24 10:05:30,043 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 179 treesize of output 135 [2023-08-24 10:05:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:30,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917335407] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:30,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:30,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2023-08-24 10:05:30,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723269231] [2023-08-24 10:05:30,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:30,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 10:05:30,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:30,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 10:05:30,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=553, Unknown=2, NotChecked=0, Total=756 [2023-08-24 10:05:30,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:05:30,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 52 transitions, 417 flow. Second operand has 28 states, 28 states have (on average 71.75) internal successors, (2009), 28 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:30,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:30,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:05:30,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:32,693 INFO L124 PetriNetUnfolderBase]: 762/1486 cut-off events. [2023-08-24 10:05:32,693 INFO L125 PetriNetUnfolderBase]: For 3156/3156 co-relation queries the response was YES. [2023-08-24 10:05:32,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5084 conditions, 1486 events. 762/1486 cut-off events. For 3156/3156 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8476 event pairs, 70 based on Foata normal form. 25/1508 useless extension candidates. Maximal degree in co-relation 4610. Up to 300 conditions per place. [2023-08-24 10:05:32,700 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 87 selfloop transitions, 66 changer transitions 78/231 dead transitions. [2023-08-24 10:05:32,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 231 transitions, 1685 flow [2023-08-24 10:05:32,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 10:05:32,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 10:05:32,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2375 transitions. [2023-08-24 10:05:32,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3040194572452637 [2023-08-24 10:05:32,707 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2375 transitions. [2023-08-24 10:05:32,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2375 transitions. [2023-08-24 10:05:32,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:32,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2375 transitions. [2023-08-24 10:05:32,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 76.61290322580645) internal successors, (2375), 31 states have internal predecessors, (2375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:32,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 252.0) internal successors, (8064), 32 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:32,723 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 252.0) internal successors, (8064), 32 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:32,723 INFO L175 Difference]: Start difference. First operand has 66 places, 52 transitions, 417 flow. Second operand 31 states and 2375 transitions. [2023-08-24 10:05:32,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 231 transitions, 1685 flow [2023-08-24 10:05:32,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 231 transitions, 1594 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-08-24 10:05:32,742 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 1048 flow [2023-08-24 10:05:32,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1048, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2023-08-24 10:05:32,742 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 10:05:32,743 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 1048 flow [2023-08-24 10:05:32,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 71.75) internal successors, (2009), 28 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:32,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:32,744 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:32,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 10:05:32,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:32,950 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:32,950 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:32,950 INFO L85 PathProgramCache]: Analyzing trace with hash -484179071, now seen corresponding path program 6 times [2023-08-24 10:05:32,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:32,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253605738] [2023-08-24 10:05:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:32,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:33,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253605738] [2023-08-24 10:05:33,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253605738] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:33,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327152478] [2023-08-24 10:05:33,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:05:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:33,804 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 10:05:33,816 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 10:05:33,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 10:05:33,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:33,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 10:05:33,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:34,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:34,139 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:34,139 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 68 treesize of output 44 [2023-08-24 10:05:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:05:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327152478] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:34,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:34,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 4] total 20 [2023-08-24 10:05:34,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629420632] [2023-08-24 10:05:34,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:34,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 10:05:34,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 10:05:34,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-08-24 10:05:34,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 10:05:34,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 1048 flow. Second operand has 22 states, 22 states have (on average 79.22727272727273) internal successors, (1743), 22 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:34,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:34,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 10:05:34,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:34,757 INFO L124 PetriNetUnfolderBase]: 838/1622 cut-off events. [2023-08-24 10:05:34,757 INFO L125 PetriNetUnfolderBase]: For 6230/6230 co-relation queries the response was YES. [2023-08-24 10:05:34,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 1622 events. 838/1622 cut-off events. For 6230/6230 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9425 event pairs, 222 based on Foata normal form. 8/1627 useless extension candidates. Maximal degree in co-relation 5819. Up to 693 conditions per place. [2023-08-24 10:05:34,765 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 78 selfloop transitions, 44 changer transitions 28/150 dead transitions. [2023-08-24 10:05:34,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 150 transitions, 1600 flow [2023-08-24 10:05:34,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 10:05:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 10:05:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1153 transitions. [2023-08-24 10:05:34,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3268140589569161 [2023-08-24 10:05:34,770 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1153 transitions. [2023-08-24 10:05:34,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1153 transitions. [2023-08-24 10:05:34,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:34,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1153 transitions. [2023-08-24 10:05:34,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 82.35714285714286) internal successors, (1153), 14 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:34,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 252.0) internal successors, (3780), 15 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:34,779 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 252.0) internal successors, (3780), 15 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:34,779 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 1048 flow. Second operand 14 states and 1153 transitions. [2023-08-24 10:05:34,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 150 transitions, 1600 flow [2023-08-24 10:05:34,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 150 transitions, 1302 flow, removed 140 selfloop flow, removed 8 redundant places. [2023-08-24 10:05:34,813 INFO L231 Difference]: Finished difference. Result has 105 places, 102 transitions, 963 flow [2023-08-24 10:05:34,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=800, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=963, PETRI_PLACES=105, PETRI_TRANSITIONS=102} [2023-08-24 10:05:34,815 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-24 10:05:34,815 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 102 transitions, 963 flow [2023-08-24 10:05:34,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 79.22727272727273) internal successors, (1743), 22 states have internal predecessors, (1743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:34,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:34,816 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:34,829 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 10:05:35,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:35,022 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:35,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1932319888, now seen corresponding path program 7 times [2023-08-24 10:05:35,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:35,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652140243] [2023-08-24 10:05:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:35,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:35,271 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:05:35,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652140243] [2023-08-24 10:05:35,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652140243] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:35,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495292952] [2023-08-24 10:05:35,272 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:05:35,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:35,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:35,277 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 10:05:35,280 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 10:05:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:35,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 10:05:35,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:35,495 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:05:35,496 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 158 treesize of output 108 [2023-08-24 10:05:35,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:05:35,527 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:35,705 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-24 10:05:35,705 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 174 treesize of output 126 [2023-08-24 10:05:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-24 10:05:35,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495292952] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:35,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:35,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 6] total 17 [2023-08-24 10:05:35,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616230655] [2023-08-24 10:05:35,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:35,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 10:05:35,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:35,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 10:05:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-24 10:05:35,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 252 [2023-08-24 10:05:35,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 102 transitions, 963 flow. Second operand has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:35,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:35,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 252 [2023-08-24 10:05:35,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:36,382 INFO L124 PetriNetUnfolderBase]: 1032/1992 cut-off events. [2023-08-24 10:05:36,382 INFO L125 PetriNetUnfolderBase]: For 4813/4817 co-relation queries the response was YES. [2023-08-24 10:05:36,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6699 conditions, 1992 events. 1032/1992 cut-off events. For 4813/4817 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12444 event pairs, 179 based on Foata normal form. 32/2012 useless extension candidates. Maximal degree in co-relation 6669. Up to 544 conditions per place. [2023-08-24 10:05:36,392 INFO L140 encePairwiseOnDemand]: 247/252 looper letters, 78 selfloop transitions, 55 changer transitions 65/202 dead transitions. [2023-08-24 10:05:36,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 202 transitions, 1922 flow [2023-08-24 10:05:36,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 10:05:36,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 10:05:36,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1655 transitions. [2023-08-24 10:05:36,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3648589065255732 [2023-08-24 10:05:36,395 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1655 transitions. [2023-08-24 10:05:36,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1655 transitions. [2023-08-24 10:05:36,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:36,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1655 transitions. [2023-08-24 10:05:36,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 91.94444444444444) internal successors, (1655), 18 states have internal predecessors, (1655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:36,402 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:36,403 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 252.0) internal successors, (4788), 19 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:36,403 INFO L175 Difference]: Start difference. First operand has 105 places, 102 transitions, 963 flow. Second operand 18 states and 1655 transitions. [2023-08-24 10:05:36,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 202 transitions, 1922 flow [2023-08-24 10:05:36,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 202 transitions, 1792 flow, removed 35 selfloop flow, removed 17 redundant places. [2023-08-24 10:05:36,422 INFO L231 Difference]: Finished difference. Result has 104 places, 102 transitions, 1144 flow [2023-08-24 10:05:36,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1144, PETRI_PLACES=104, PETRI_TRANSITIONS=102} [2023-08-24 10:05:36,423 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 84 predicate places. [2023-08-24 10:05:36,423 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 102 transitions, 1144 flow [2023-08-24 10:05:36,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 87.5) internal successors, (1575), 18 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:36,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:36,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:36,435 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 10:05:36,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:36,630 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:36,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1926316929, now seen corresponding path program 8 times [2023-08-24 10:05:36,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:36,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381216014] [2023-08-24 10:05:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:36,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:37,548 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:37,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:37,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381216014] [2023-08-24 10:05:37,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381216014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:37,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262201695] [2023-08-24 10:05:37,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:05:37,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:37,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:37,550 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 10:05:37,552 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 10:05:37,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:05:37,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:37,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 10:05:37,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:38,046 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:38,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:38,473 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-24 10:05:38,473 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 236 treesize of output 190 [2023-08-24 10:05:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:39,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262201695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:39,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:39,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 10:05:39,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619065454] [2023-08-24 10:05:39,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:39,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 10:05:39,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 10:05:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=671, Unknown=0, NotChecked=0, Total=870 [2023-08-24 10:05:39,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 10:05:39,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 102 transitions, 1144 flow. Second operand has 30 states, 30 states have (on average 78.73333333333333) internal successors, (2362), 30 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:39,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:39,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 10:05:39,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:41,385 INFO L124 PetriNetUnfolderBase]: 1693/3174 cut-off events. [2023-08-24 10:05:41,385 INFO L125 PetriNetUnfolderBase]: For 10128/10128 co-relation queries the response was YES. [2023-08-24 10:05:41,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11994 conditions, 3174 events. 1693/3174 cut-off events. For 10128/10128 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21033 event pairs, 188 based on Foata normal form. 14/3188 useless extension candidates. Maximal degree in co-relation 11968. Up to 857 conditions per place. [2023-08-24 10:05:41,404 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 172 selfloop transitions, 124 changer transitions 107/403 dead transitions. [2023-08-24 10:05:41,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 403 transitions, 3805 flow [2023-08-24 10:05:41,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 10:05:41,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 10:05:41,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3300 transitions. [2023-08-24 10:05:41,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33577533577533575 [2023-08-24 10:05:41,409 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3300 transitions. [2023-08-24 10:05:41,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3300 transitions. [2023-08-24 10:05:41,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:41,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3300 transitions. [2023-08-24 10:05:41,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 84.61538461538461) internal successors, (3300), 39 states have internal predecessors, (3300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:41,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 252.0) internal successors, (10080), 40 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:41,424 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 252.0) internal successors, (10080), 40 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:41,424 INFO L175 Difference]: Start difference. First operand has 104 places, 102 transitions, 1144 flow. Second operand 39 states and 3300 transitions. [2023-08-24 10:05:41,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 403 transitions, 3805 flow [2023-08-24 10:05:41,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 403 transitions, 3455 flow, removed 166 selfloop flow, removed 10 redundant places. [2023-08-24 10:05:41,470 INFO L231 Difference]: Finished difference. Result has 130 places, 179 transitions, 2453 flow [2023-08-24 10:05:41,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1046, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2453, PETRI_PLACES=130, PETRI_TRANSITIONS=179} [2023-08-24 10:05:41,471 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 110 predicate places. [2023-08-24 10:05:41,472 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 179 transitions, 2453 flow [2023-08-24 10:05:41,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 78.73333333333333) internal successors, (2362), 30 states have internal predecessors, (2362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:41,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:41,472 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:41,481 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 10:05:41,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 10:05:41,681 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:41,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:41,682 INFO L85 PathProgramCache]: Analyzing trace with hash -631472656, now seen corresponding path program 9 times [2023-08-24 10:05:41,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018753570] [2023-08-24 10:05:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:41,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:42,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018753570] [2023-08-24 10:05:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018753570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342717310] [2023-08-24 10:05:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:05:42,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:42,873 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 10:05:42,884 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 10:05:43,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 10:05:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:43,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 10:05:43,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:43,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:43,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:44,082 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 10:05:44,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 10:05:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342717310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:45,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:45,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 36 [2023-08-24 10:05:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998581994] [2023-08-24 10:05:45,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:45,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-24 10:05:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-24 10:05:45,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1149, Unknown=0, NotChecked=0, Total=1406 [2023-08-24 10:05:45,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 10:05:45,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 179 transitions, 2453 flow. Second operand has 38 states, 38 states have (on average 78.57894736842105) internal successors, (2986), 38 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:45,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:45,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 10:05:45,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:49,641 INFO L124 PetriNetUnfolderBase]: 2539/4776 cut-off events. [2023-08-24 10:05:49,641 INFO L125 PetriNetUnfolderBase]: For 27711/27711 co-relation queries the response was YES. [2023-08-24 10:05:49,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20780 conditions, 4776 events. 2539/4776 cut-off events. For 27711/27711 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34015 event pairs, 380 based on Foata normal form. 75/4851 useless extension candidates. Maximal degree in co-relation 20740. Up to 1197 conditions per place. [2023-08-24 10:05:49,665 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 269 selfloop transitions, 164 changer transitions 144/577 dead transitions. [2023-08-24 10:05:49,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 577 transitions, 6506 flow [2023-08-24 10:05:49,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 10:05:49,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 10:05:49,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4408 transitions. [2023-08-24 10:05:49,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3363858363858364 [2023-08-24 10:05:49,672 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4408 transitions. [2023-08-24 10:05:49,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4408 transitions. [2023-08-24 10:05:49,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:49,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4408 transitions. [2023-08-24 10:05:49,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 84.76923076923077) internal successors, (4408), 52 states have internal predecessors, (4408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:49,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 252.0) internal successors, (13356), 53 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:49,692 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 252.0) internal successors, (13356), 53 states have internal predecessors, (13356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:49,692 INFO L175 Difference]: Start difference. First operand has 130 places, 179 transitions, 2453 flow. Second operand 52 states and 4408 transitions. [2023-08-24 10:05:49,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 577 transitions, 6506 flow [2023-08-24 10:05:49,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 577 transitions, 6016 flow, removed 229 selfloop flow, removed 7 redundant places. [2023-08-24 10:05:49,806 INFO L231 Difference]: Finished difference. Result has 196 places, 248 transitions, 3845 flow [2023-08-24 10:05:49,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=1963, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=3845, PETRI_PLACES=196, PETRI_TRANSITIONS=248} [2023-08-24 10:05:49,807 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-08-24 10:05:49,807 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 248 transitions, 3845 flow [2023-08-24 10:05:49,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 78.57894736842105) internal successors, (2986), 38 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:49,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:49,808 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:49,816 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 10:05:50,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:50,014 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:50,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:50,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1380428386, now seen corresponding path program 10 times [2023-08-24 10:05:50,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:50,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755175501] [2023-08-24 10:05:50,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:50,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:50,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:51,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:51,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755175501] [2023-08-24 10:05:51,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755175501] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:51,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847918100] [2023-08-24 10:05:51,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:05:51,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:51,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:51,557 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 10:05:51,580 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 10:05:51,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:05:51,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:51,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-24 10:05:51,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:52,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:05:52,614 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 10:05:52,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 10:05:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:53,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847918100] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:05:53,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:05:53,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 34 [2023-08-24 10:05:53,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897785513] [2023-08-24 10:05:53,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:05:53,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 10:05:53,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:05:53,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 10:05:53,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=1020, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 10:05:53,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:05:53,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 248 transitions, 3845 flow. Second operand has 36 states, 36 states have (on average 71.61111111111111) internal successors, (2578), 36 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:53,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:05:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:05:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:05:57,148 INFO L124 PetriNetUnfolderBase]: 3459/6454 cut-off events. [2023-08-24 10:05:57,148 INFO L125 PetriNetUnfolderBase]: For 98411/98411 co-relation queries the response was YES. [2023-08-24 10:05:57,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35228 conditions, 6454 events. 3459/6454 cut-off events. For 98411/98411 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 47152 event pairs, 648 based on Foata normal form. 8/6462 useless extension candidates. Maximal degree in co-relation 35165. Up to 1870 conditions per place. [2023-08-24 10:05:57,185 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 227 selfloop transitions, 206 changer transitions 99/532 dead transitions. [2023-08-24 10:05:57,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 532 transitions, 7819 flow [2023-08-24 10:05:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 10:05:57,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 10:05:57,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2700 transitions. [2023-08-24 10:05:57,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30612244897959184 [2023-08-24 10:05:57,190 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2700 transitions. [2023-08-24 10:05:57,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2700 transitions. [2023-08-24 10:05:57,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:05:57,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2700 transitions. [2023-08-24 10:05:57,193 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 77.14285714285714) internal successors, (2700), 35 states have internal predecessors, (2700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:57,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 252.0) internal successors, (9072), 36 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:57,201 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 252.0) internal successors, (9072), 36 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:57,201 INFO L175 Difference]: Start difference. First operand has 196 places, 248 transitions, 3845 flow. Second operand 35 states and 2700 transitions. [2023-08-24 10:05:57,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 532 transitions, 7819 flow [2023-08-24 10:05:57,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 532 transitions, 6819 flow, removed 472 selfloop flow, removed 20 redundant places. [2023-08-24 10:05:57,666 INFO L231 Difference]: Finished difference. Result has 217 places, 322 transitions, 5088 flow [2023-08-24 10:05:57,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=3213, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=5088, PETRI_PLACES=217, PETRI_TRANSITIONS=322} [2023-08-24 10:05:57,667 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-08-24 10:05:57,667 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 322 transitions, 5088 flow [2023-08-24 10:05:57,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 71.61111111111111) internal successors, (2578), 36 states have internal predecessors, (2578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:05:57,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:05:57,668 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:05:57,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 10:05:57,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 10:05:57,873 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:05:57,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:05:57,873 INFO L85 PathProgramCache]: Analyzing trace with hash 2123255324, now seen corresponding path program 11 times [2023-08-24 10:05:57,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:05:57,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752914741] [2023-08-24 10:05:57,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:05:57,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:05:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:05:59,132 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:59,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:05:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752914741] [2023-08-24 10:05:59,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752914741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:05:59,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983157516] [2023-08-24 10:05:59,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:05:59,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:05:59,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:05:59,137 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 10:05:59,139 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 10:05:59,398 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 10:05:59,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:05:59,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-24 10:05:59,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:05:59,520 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 10:05:59,570 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 10:05:59,613 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 10:05:59,961 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:05:59,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:06:01,081 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:06:01,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-24 10:06:01,133 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 10:06:01,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 378 [2023-08-24 10:06:01,204 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 10:06:01,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 298 [2023-08-24 10:06:01,265 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-24 10:06:01,265 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 229 [2023-08-24 10:06:03,542 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:06:03,542 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-24 10:06:03,573 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 10:06:03,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 376 treesize of output 336 [2023-08-24 10:06:03,630 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 10:06:03,631 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 324 treesize of output 256 [2023-08-24 10:06:03,663 INFO L322 Elim1Store]: treesize reduction 72, result has 15.3 percent of original size [2023-08-24 10:06:03,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 187 [2023-08-24 10:06:03,769 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:06:03,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:03,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983157516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:06:03,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:06:03,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 37 [2023-08-24 10:06:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004026787] [2023-08-24 10:06:03,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:06:03,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 10:06:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:06:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 10:06:03,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=1126, Unknown=6, NotChecked=0, Total=1482 [2023-08-24 10:06:03,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:06:03,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 322 transitions, 5088 flow. Second operand has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:03,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:06:03,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:06:03,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:06:08,205 INFO L124 PetriNetUnfolderBase]: 3885/7241 cut-off events. [2023-08-24 10:06:08,205 INFO L125 PetriNetUnfolderBase]: For 140681/140681 co-relation queries the response was YES. [2023-08-24 10:06:08,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40289 conditions, 7241 events. 3885/7241 cut-off events. For 140681/140681 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 54240 event pairs, 1350 based on Foata normal form. 12/7253 useless extension candidates. Maximal degree in co-relation 40220. Up to 5546 conditions per place. [2023-08-24 10:06:08,246 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 326 selfloop transitions, 108 changer transitions 102/536 dead transitions. [2023-08-24 10:06:08,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 536 transitions, 7635 flow [2023-08-24 10:06:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 10:06:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 10:06:08,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2900 transitions. [2023-08-24 10:06:08,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3028404344193818 [2023-08-24 10:06:08,252 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2900 transitions. [2023-08-24 10:06:08,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2900 transitions. [2023-08-24 10:06:08,253 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:06:08,253 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2900 transitions. [2023-08-24 10:06:08,256 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 76.3157894736842) internal successors, (2900), 38 states have internal predecessors, (2900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:08,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 252.0) internal successors, (9828), 39 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:08,263 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 252.0) internal successors, (9828), 39 states have internal predecessors, (9828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:08,263 INFO L175 Difference]: Start difference. First operand has 217 places, 322 transitions, 5088 flow. Second operand 38 states and 2900 transitions. [2023-08-24 10:06:08,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 536 transitions, 7635 flow [2023-08-24 10:06:08,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 536 transitions, 7264 flow, removed 123 selfloop flow, removed 20 redundant places. [2023-08-24 10:06:08,887 INFO L231 Difference]: Finished difference. Result has 247 places, 370 transitions, 5944 flow [2023-08-24 10:06:08,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=4761, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=5944, PETRI_PLACES=247, PETRI_TRANSITIONS=370} [2023-08-24 10:06:08,888 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 227 predicate places. [2023-08-24 10:06:08,888 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 370 transitions, 5944 flow [2023-08-24 10:06:08,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 71.56410256410257) internal successors, (2791), 39 states have internal predecessors, (2791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:08,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:06:08,889 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:06:08,894 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 10:06:09,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 10:06:09,090 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:06:09,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:06:09,090 INFO L85 PathProgramCache]: Analyzing trace with hash -120658482, now seen corresponding path program 12 times [2023-08-24 10:06:09,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:06:09,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625969826] [2023-08-24 10:06:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:06:09,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:06:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:06:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:10,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:06:10,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625969826] [2023-08-24 10:06:10,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625969826] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:06:10,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246528681] [2023-08-24 10:06:10,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:06:10,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:06:10,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:06:10,453 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 10:06:10,455 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 10:06:10,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 10:06:10,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:06:10,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-24 10:06:10,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:06:10,785 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 13 treesize of output 9 [2023-08-24 10:06:10,830 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 10:06:10,858 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 10:06:11,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:11,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:11,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:11,185 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:06:11,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:11,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:06:11,190 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:06:11,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 24 [2023-08-24 10:06:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:11,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:06:13,403 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:06:13,403 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 120 [2023-08-24 10:06:13,460 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 10:06:13,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 368 treesize of output 372 [2023-08-24 10:06:13,518 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 10:06:13,518 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 318 treesize of output 296 [2023-08-24 10:06:13,580 INFO L322 Elim1Store]: treesize reduction 54, result has 50.5 percent of original size [2023-08-24 10:06:13,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 213 treesize of output 229 [2023-08-24 10:06:15,644 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:06:15,644 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 180 treesize of output 120 [2023-08-24 10:06:15,679 INFO L322 Elim1Store]: treesize reduction 96, result has 11.9 percent of original size [2023-08-24 10:06:15,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 776 treesize of output 688 [2023-08-24 10:06:15,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:15,699 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:06:15,700 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:06:15,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:15,702 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-24 10:06:15,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-24 10:06:15,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 216 [2023-08-24 10:06:15,736 INFO L322 Elim1Store]: treesize reduction 96, result has 11.9 percent of original size [2023-08-24 10:06:15,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 251 treesize of output 187 [2023-08-24 10:06:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246528681] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:06:16,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:06:16,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-24 10:06:16,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721470848] [2023-08-24 10:06:16,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:06:16,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-24 10:06:16,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:06:16,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-24 10:06:16,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1216, Unknown=4, NotChecked=0, Total=1560 [2023-08-24 10:06:16,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:06:16,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 370 transitions, 5944 flow. Second operand has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:16,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:06:16,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:06:16,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:06:24,913 WARN L234 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 162 DAG size of output: 143 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 10:06:33,831 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:06:35,080 INFO L124 PetriNetUnfolderBase]: 4745/8862 cut-off events. [2023-08-24 10:06:35,081 INFO L125 PetriNetUnfolderBase]: For 211353/211353 co-relation queries the response was YES. [2023-08-24 10:06:35,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52411 conditions, 8862 events. 4745/8862 cut-off events. For 211353/211353 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 67707 event pairs, 876 based on Foata normal form. 93/8955 useless extension candidates. Maximal degree in co-relation 52329. Up to 3769 conditions per place. [2023-08-24 10:06:35,133 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 286 selfloop transitions, 242 changer transitions 146/674 dead transitions. [2023-08-24 10:06:35,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 674 transitions, 10211 flow [2023-08-24 10:06:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 10:06:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 10:06:35,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3540 transitions. [2023-08-24 10:06:35,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3053830227743271 [2023-08-24 10:06:35,138 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3540 transitions. [2023-08-24 10:06:35,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3540 transitions. [2023-08-24 10:06:35,139 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:06:35,139 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3540 transitions. [2023-08-24 10:06:35,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 76.95652173913044) internal successors, (3540), 46 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:35,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 252.0) internal successors, (11844), 47 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:35,150 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 252.0) internal successors, (11844), 47 states have internal predecessors, (11844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:35,150 INFO L175 Difference]: Start difference. First operand has 247 places, 370 transitions, 5944 flow. Second operand 46 states and 3540 transitions. [2023-08-24 10:06:35,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 674 transitions, 10211 flow [2023-08-24 10:06:36,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 674 transitions, 9281 flow, removed 405 selfloop flow, removed 29 redundant places. [2023-08-24 10:06:36,023 INFO L231 Difference]: Finished difference. Result has 280 places, 443 transitions, 7962 flow [2023-08-24 10:06:36,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=4450, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=7962, PETRI_PLACES=280, PETRI_TRANSITIONS=443} [2023-08-24 10:06:36,024 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 260 predicate places. [2023-08-24 10:06:36,024 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 443 transitions, 7962 flow [2023-08-24 10:06:36,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 71.525) internal successors, (2861), 40 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:36,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:06:36,025 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:06:36,029 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-24 10:06:36,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-24 10:06:36,225 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:06:36,226 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:06:36,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1137524077, now seen corresponding path program 13 times [2023-08-24 10:06:36,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:06:36,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299674131] [2023-08-24 10:06:36,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:06:36,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:06:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:06:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:38,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:06:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299674131] [2023-08-24 10:06:38,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299674131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:06:38,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400524667] [2023-08-24 10:06:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 10:06:38,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:06:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:06:38,009 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 10:06:38,011 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 10:06:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:06:38,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 10:06:38,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:06:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 10:06:38,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:06:38,934 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 10:06:38,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 264 treesize of output 230 [2023-08-24 10:06:39,727 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:06:39,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400524667] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:06:39,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:06:39,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 31 [2023-08-24 10:06:39,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270475259] [2023-08-24 10:06:39,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:06:39,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 10:06:39,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:06:39,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 10:06:39,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 10:06:39,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 10:06:39,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 443 transitions, 7962 flow. Second operand has 33 states, 33 states have (on average 78.84848484848484) internal successors, (2602), 33 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:39,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:06:39,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 10:06:39,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:06:43,060 INFO L124 PetriNetUnfolderBase]: 5579/10352 cut-off events. [2023-08-24 10:06:43,060 INFO L125 PetriNetUnfolderBase]: For 223408/223408 co-relation queries the response was YES. [2023-08-24 10:06:43,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59042 conditions, 10352 events. 5579/10352 cut-off events. For 223408/223408 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 79781 event pairs, 1250 based on Foata normal form. 48/10400 useless extension candidates. Maximal degree in co-relation 58943. Up to 5186 conditions per place. [2023-08-24 10:06:43,121 INFO L140 encePairwiseOnDemand]: 245/252 looper letters, 347 selfloop transitions, 248 changer transitions 114/709 dead transitions. [2023-08-24 10:06:43,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 709 transitions, 12303 flow [2023-08-24 10:06:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 10:06:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 10:06:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2780 transitions. [2023-08-24 10:06:43,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3342953342953343 [2023-08-24 10:06:43,126 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2780 transitions. [2023-08-24 10:06:43,126 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2780 transitions. [2023-08-24 10:06:43,126 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:06:43,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2780 transitions. [2023-08-24 10:06:43,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 84.24242424242425) internal successors, (2780), 33 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 10:06:43,135 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 252.0) internal successors, (8568), 34 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:43,135 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 252.0) internal successors, (8568), 34 states have internal predecessors, (8568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:43,135 INFO L175 Difference]: Start difference. First operand has 280 places, 443 transitions, 7962 flow. Second operand 33 states and 2780 transitions. [2023-08-24 10:06:43,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 709 transitions, 12303 flow [2023-08-24 10:06:44,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 709 transitions, 10850 flow, removed 665 selfloop flow, removed 24 redundant places. [2023-08-24 10:06:44,238 INFO L231 Difference]: Finished difference. Result has 299 places, 521 transitions, 9350 flow [2023-08-24 10:06:44,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=9350, PETRI_PLACES=299, PETRI_TRANSITIONS=521} [2023-08-24 10:06:44,239 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 279 predicate places. [2023-08-24 10:06:44,239 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 521 transitions, 9350 flow [2023-08-24 10:06:44,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 78.84848484848484) internal successors, (2602), 33 states have internal predecessors, (2602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:44,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:06:44,239 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:06:44,244 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 10:06:44,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 10:06:44,440 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:06:44,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:06:44,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1786684284, now seen corresponding path program 14 times [2023-08-24 10:06:44,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:06:44,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271058447] [2023-08-24 10:06:44,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:06:44,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:06:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:06:46,020 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:46,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:06:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271058447] [2023-08-24 10:06:46,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271058447] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:06:46,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051626807] [2023-08-24 10:06:46,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 10:06:46,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:06:46,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:06:46,025 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 10:06:46,055 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 10:06:46,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 10:06:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:06:46,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-24 10:06:46,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:06:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:46,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:06:47,341 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 10:06:47,341 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 10:06:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:06:48,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051626807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:06:48,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:06:48,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 42 [2023-08-24 10:06:48,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393335297] [2023-08-24 10:06:48,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:06:48,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-24 10:06:48,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:06:48,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-24 10:06:48,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2023-08-24 10:06:48,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:06:48,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 521 transitions, 9350 flow. Second operand has 44 states, 44 states have (on average 71.52272727272727) internal successors, (3147), 44 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:06:48,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:06:48,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:06:48,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:07:15,665 INFO L124 PetriNetUnfolderBase]: 26306/48216 cut-off events. [2023-08-24 10:07:15,666 INFO L125 PetriNetUnfolderBase]: For 1352975/1352975 co-relation queries the response was YES. [2023-08-24 10:07:16,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333357 conditions, 48216 events. 26306/48216 cut-off events. For 1352975/1352975 co-relation queries the response was YES. Maximal size of possible extension queue 1920. Compared 456134 event pairs, 1436 based on Foata normal form. 282/48498 useless extension candidates. Maximal degree in co-relation 333246. Up to 13989 conditions per place. [2023-08-24 10:07:16,332 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 581 selfloop transitions, 1979 changer transitions 386/2946 dead transitions. [2023-08-24 10:07:16,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2946 transitions, 57450 flow [2023-08-24 10:07:16,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-08-24 10:07:16,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2023-08-24 10:07:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 11185 transitions. [2023-08-24 10:07:16,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3103840603840604 [2023-08-24 10:07:16,349 INFO L72 ComplementDD]: Start complementDD. Operand 143 states and 11185 transitions. [2023-08-24 10:07:16,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 143 states and 11185 transitions. [2023-08-24 10:07:16,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:07:16,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 143 states and 11185 transitions. [2023-08-24 10:07:16,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 144 states, 143 states have (on average 78.21678321678321) internal successors, (11185), 143 states have internal predecessors, (11185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:07:16,395 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 144 states, 144 states have (on average 252.0) internal successors, (36288), 144 states have internal predecessors, (36288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:07:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 144 states, 144 states have (on average 252.0) internal successors, (36288), 144 states have internal predecessors, (36288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:07:16,400 INFO L175 Difference]: Start difference. First operand has 299 places, 521 transitions, 9350 flow. Second operand 143 states and 11185 transitions. [2023-08-24 10:07:16,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2946 transitions, 57450 flow [2023-08-24 10:07:21,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 2946 transitions, 54337 flow, removed 1439 selfloop flow, removed 21 redundant places. [2023-08-24 10:07:21,154 INFO L231 Difference]: Finished difference. Result has 505 places, 2126 transitions, 50014 flow [2023-08-24 10:07:21,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=8681, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=450, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=143, PETRI_FLOW=50014, PETRI_PLACES=505, PETRI_TRANSITIONS=2126} [2023-08-24 10:07:21,155 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 485 predicate places. [2023-08-24 10:07:21,155 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 2126 transitions, 50014 flow [2023-08-24 10:07:21,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 71.52272727272727) internal successors, (3147), 44 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:07:21,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:07:21,156 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:07:21,163 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 10:07:21,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:07:21,361 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:07:21,362 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:07:21,362 INFO L85 PathProgramCache]: Analyzing trace with hash 383970864, now seen corresponding path program 15 times [2023-08-24 10:07:21,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:07:21,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94927936] [2023-08-24 10:07:21,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:07:21,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:07:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:07:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:07:22,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:07:22,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94927936] [2023-08-24 10:07:22,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94927936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:07:22,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522172934] [2023-08-24 10:07:22,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 10:07:22,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:07:22,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:07:22,646 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 10:07:22,647 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 10:07:22,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 10:07:22,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:07:22,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-24 10:07:22,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:07:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:07:23,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:07:23,979 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-24 10:07:23,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 284 treesize of output 250 [2023-08-24 10:07:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:07:25,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522172934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:07:25,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:07:25,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 41 [2023-08-24 10:07:25,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735474234] [2023-08-24 10:07:25,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:07:25,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-24 10:07:25,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:07:25,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-24 10:07:25,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1518, Unknown=0, NotChecked=0, Total=1806 [2023-08-24 10:07:25,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 252 [2023-08-24 10:07:25,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 2126 transitions, 50014 flow. Second operand has 43 states, 43 states have (on average 78.53488372093024) internal successors, (3377), 43 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:07:25,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:07:25,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 252 [2023-08-24 10:07:25,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:08:36,665 INFO L124 PetriNetUnfolderBase]: 48387/88745 cut-off events. [2023-08-24 10:08:36,665 INFO L125 PetriNetUnfolderBase]: For 6263825/6263825 co-relation queries the response was YES. [2023-08-24 10:08:38,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 717239 conditions, 88745 events. 48387/88745 cut-off events. For 6263825/6263825 co-relation queries the response was YES. Maximal size of possible extension queue 3753. Compared 918662 event pairs, 16408 based on Foata normal form. 604/89349 useless extension candidates. Maximal degree in co-relation 717049. Up to 42929 conditions per place. [2023-08-24 10:08:39,198 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 2865 selfloop transitions, 2116 changer transitions 469/5450 dead transitions. [2023-08-24 10:08:39,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 675 places, 5450 transitions, 154237 flow [2023-08-24 10:08:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2023-08-24 10:08:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2023-08-24 10:08:39,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 14855 transitions. [2023-08-24 10:08:39,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33878398102536034 [2023-08-24 10:08:39,215 INFO L72 ComplementDD]: Start complementDD. Operand 174 states and 14855 transitions. [2023-08-24 10:08:39,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 174 states and 14855 transitions. [2023-08-24 10:08:39,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:08:39,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 174 states and 14855 transitions. [2023-08-24 10:08:39,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 175 states, 174 states have (on average 85.3735632183908) internal successors, (14855), 174 states have internal predecessors, (14855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:08:39,263 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 175 states, 175 states have (on average 252.0) internal successors, (44100), 175 states have internal predecessors, (44100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:08:39,269 INFO L81 ComplementDD]: Finished complementDD. Result has 175 states, 175 states have (on average 252.0) internal successors, (44100), 175 states have internal predecessors, (44100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:08:39,269 INFO L175 Difference]: Start difference. First operand has 505 places, 2126 transitions, 50014 flow. Second operand 174 states and 14855 transitions. [2023-08-24 10:08:39,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 675 places, 5450 transitions, 154237 flow [2023-08-24 10:09:33,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 661 places, 5450 transitions, 97613 flow, removed 28286 selfloop flow, removed 14 redundant places. [2023-08-24 10:09:33,992 INFO L231 Difference]: Finished difference. Result has 766 places, 4023 transitions, 75801 flow [2023-08-24 10:09:33,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=33839, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=554, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=174, PETRI_FLOW=75801, PETRI_PLACES=766, PETRI_TRANSITIONS=4023} [2023-08-24 10:09:33,994 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 746 predicate places. [2023-08-24 10:09:33,994 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 4023 transitions, 75801 flow [2023-08-24 10:09:33,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 78.53488372093024) internal successors, (3377), 43 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:33,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:09:33,995 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:09:33,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-24 10:09:34,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 10:09:34,195 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:09:34,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:09:34,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1902098650, now seen corresponding path program 16 times [2023-08-24 10:09:34,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:09:34,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568996152] [2023-08-24 10:09:34,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:09:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:09:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:09:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:09:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:09:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568996152] [2023-08-24 10:09:34,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568996152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:09:34,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499424087] [2023-08-24 10:09:34,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 10:09:34,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:09:34,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:09:34,485 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 10:09:34,491 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 10:09:34,610 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 10:09:34,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:09:34,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 10:09:34,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:09:34,762 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:09:34,762 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 226 treesize of output 140 [2023-08-24 10:09:34,780 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-24 10:09:34,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:09:35,053 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-24 10:09:35,054 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 260 treesize of output 176 [2023-08-24 10:09:35,102 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-24 10:09:35,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499424087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:09:35,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:09:35,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 8] total 18 [2023-08-24 10:09:35,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701503253] [2023-08-24 10:09:35,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:09:35,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 10:09:35,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:09:35,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 10:09:35,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2023-08-24 10:09:35,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 252 [2023-08-24 10:09:35,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 4023 transitions, 75801 flow. Second operand has 19 states, 19 states have (on average 97.52631578947368) internal successors, (1853), 19 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:09:35,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:09:35,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 252 [2023-08-24 10:09:35,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:11:11,028 INFO L124 PetriNetUnfolderBase]: 50979/93696 cut-off events. [2023-08-24 10:11:11,028 INFO L125 PetriNetUnfolderBase]: For 7817428/7817428 co-relation queries the response was YES. [2023-08-24 10:11:15,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535146 conditions, 93696 events. 50979/93696 cut-off events. For 7817428/7817428 co-relation queries the response was YES. Maximal size of possible extension queue 4132. Compared 981744 event pairs, 17730 based on Foata normal form. 156/93852 useless extension candidates. Maximal degree in co-relation 534853. Up to 73331 conditions per place. [2023-08-24 10:11:15,611 INFO L140 encePairwiseOnDemand]: 248/252 looper letters, 3365 selfloop transitions, 1095 changer transitions 15/4475 dead transitions. [2023-08-24 10:11:15,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 770 places, 4475 transitions, 97677 flow [2023-08-24 10:11:15,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 10:11:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 10:11:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1967 transitions. [2023-08-24 10:11:15,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108187134502924 [2023-08-24 10:11:15,613 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1967 transitions. [2023-08-24 10:11:15,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1967 transitions. [2023-08-24 10:11:15,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:11:15,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1967 transitions. [2023-08-24 10:11:15,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 103.52631578947368) internal successors, (1967), 19 states have internal predecessors, (1967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:15,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 252.0) internal successors, (5040), 20 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:15,619 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 252.0) internal successors, (5040), 20 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:11:15,619 INFO L175 Difference]: Start difference. First operand has 766 places, 4023 transitions, 75801 flow. Second operand 19 states and 1967 transitions. [2023-08-24 10:11:15,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 770 places, 4475 transitions, 97677 flow [2023-08-24 10:12:53,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 740 places, 4475 transitions, 87302 flow, removed 5132 selfloop flow, removed 30 redundant places. [2023-08-24 10:12:53,354 INFO L231 Difference]: Finished difference. Result has 748 places, 4340 transitions, 77321 flow [2023-08-24 10:12:53,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=63293, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3849, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2948, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=77321, PETRI_PLACES=748, PETRI_TRANSITIONS=4340} [2023-08-24 10:12:53,358 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 728 predicate places. [2023-08-24 10:12:53,358 INFO L495 AbstractCegarLoop]: Abstraction has has 748 places, 4340 transitions, 77321 flow [2023-08-24 10:12:53,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 97.52631578947368) internal successors, (1853), 19 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:12:53,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:12:53,358 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:12:53,366 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 10:12:53,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:12:53,564 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:12:53,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:12:53,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1414204169, now seen corresponding path program 17 times [2023-08-24 10:12:53,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:12:53,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615274025] [2023-08-24 10:12:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:12:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:12:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:12:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:12:55,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:12:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615274025] [2023-08-24 10:12:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615274025] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:12:55,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56928655] [2023-08-24 10:12:55,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 10:12:55,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:12:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:12:55,056 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 10:12:55,057 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 10:12:55,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 10:12:55,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:12:55,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjunts are in the unsatisfiable core [2023-08-24 10:12:55,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:12:55,458 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 15 treesize of output 11 [2023-08-24 10:12:55,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:12:55,530 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 10:12:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:12:55,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:12:57,310 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:12:57,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-08-24 10:12:57,393 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:12:57,394 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 1038 treesize of output 1050 [2023-08-24 10:12:57,506 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:12:57,507 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 340 treesize of output 438 [2023-08-24 10:12:57,606 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:12:57,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 339 treesize of output 383 [2023-08-24 10:13:24,387 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:13:24,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-08-24 10:13:24,431 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 10:13:24,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 440 [2023-08-24 10:13:24,479 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 10:13:24,479 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 332 [2023-08-24 10:13:24,527 INFO L322 Elim1Store]: treesize reduction 136, result has 11.1 percent of original size [2023-08-24 10:13:24,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 247 [2023-08-24 10:13:24,734 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-24 10:13:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:13:24,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56928655] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 10:13:24,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 10:13:24,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 46 [2023-08-24 10:13:24,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075904828] [2023-08-24 10:13:24,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 10:13:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-24 10:13:24,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 10:13:24,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-24 10:13:25,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1851, Unknown=6, NotChecked=0, Total=2256 [2023-08-24 10:13:25,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 252 [2023-08-24 10:13:25,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 748 places, 4340 transitions, 77321 flow. Second operand has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:13:25,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 10:13:25,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 252 [2023-08-24 10:13:25,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 10:13:27,859 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-24 10:15:30,212 INFO L124 PetriNetUnfolderBase]: 58931/107911 cut-off events. [2023-08-24 10:15:30,213 INFO L125 PetriNetUnfolderBase]: For 8188485/8188485 co-relation queries the response was YES. [2023-08-24 10:15:34,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600915 conditions, 107911 events. 58931/107911 cut-off events. For 8188485/8188485 co-relation queries the response was YES. Maximal size of possible extension queue 4828. Compared 1149035 event pairs, 24407 based on Foata normal form. 235/108146 useless extension candidates. Maximal degree in co-relation 600631. Up to 70972 conditions per place. [2023-08-24 10:15:34,844 INFO L140 encePairwiseOnDemand]: 244/252 looper letters, 3947 selfloop transitions, 1376 changer transitions 229/5552 dead transitions. [2023-08-24 10:15:34,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 718 places, 5552 transitions, 114440 flow [2023-08-24 10:15:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-24 10:15:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-24 10:15:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 5869 transitions. [2023-08-24 10:15:34,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30644319131161235 [2023-08-24 10:15:34,849 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 5869 transitions. [2023-08-24 10:15:34,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 5869 transitions. [2023-08-24 10:15:34,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 10:15:34,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 5869 transitions. [2023-08-24 10:15:34,856 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 77.22368421052632) internal successors, (5869), 76 states have internal predecessors, (5869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:15:34,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 252.0) internal successors, (19404), 77 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:15:34,868 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 252.0) internal successors, (19404), 77 states have internal predecessors, (19404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:15:34,868 INFO L175 Difference]: Start difference. First operand has 748 places, 4340 transitions, 77321 flow. Second operand 76 states and 5869 transitions. [2023-08-24 10:15:34,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 718 places, 5552 transitions, 114440 flow [2023-08-24 10:17:37,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 642 places, 5552 transitions, 108647 flow, removed 2744 selfloop flow, removed 76 redundant places. [2023-08-24 10:17:37,397 INFO L231 Difference]: Finished difference. Result has 657 places, 4456 transitions, 86777 flow [2023-08-24 10:17:37,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=252, PETRI_DIFFERENCE_MINUEND_FLOW=62402, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=617, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=86777, PETRI_PLACES=657, PETRI_TRANSITIONS=4456} [2023-08-24 10:17:37,400 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 637 predicate places. [2023-08-24 10:17:37,400 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 4456 transitions, 86777 flow [2023-08-24 10:17:37,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 71.45833333333333) internal successors, (3430), 48 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 10:17:37,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 10:17:37,401 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 10:17:37,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 10:17:37,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:17:37,607 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 10:17:37,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 10:17:37,608 INFO L85 PathProgramCache]: Analyzing trace with hash 287513655, now seen corresponding path program 18 times [2023-08-24 10:17:37,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 10:17:37,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671822701] [2023-08-24 10:17:37,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 10:17:37,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 10:17:37,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 10:17:38,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:17:38,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 10:17:38,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671822701] [2023-08-24 10:17:38,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671822701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 10:17:38,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363355251] [2023-08-24 10:17:38,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 10:17:38,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:17:38,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 10:17:38,972 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 10:17:38,973 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 10:17:39,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 10:17:39,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 10:17:39,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-24 10:17:39,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 10:17:39,307 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 15 treesize of output 11 [2023-08-24 10:17:39,342 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 10:17:39,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-24 10:17:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 10:17:39,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 10:17:41,285 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-24 10:17:41,285 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 243 treesize of output 159 [2023-08-24 10:17:41,439 INFO L322 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2023-08-24 10:17:41,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 494 treesize of output 566 [2023-08-24 10:17:41,597 INFO L322 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2023-08-24 10:17:41,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 424 treesize of output 458 [2023-08-24 10:17:41,756 INFO L322 Elim1Store]: treesize reduction 10, result has 93.5 percent of original size [2023-08-24 10:17:41,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 285 treesize of output 373 Received shutdown request... [2023-08-24 10:18:01,071 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-24 10:18:01,073 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 10:18:01,080 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 10:18:01,081 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 10:18:01,081 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 10:18:01,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 10:18:01,279 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 26 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 22ms.. [2023-08-24 10:18:01,280 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 10:18:01,280 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 10:18:01,281 INFO L445 BasicCegarLoop]: Path program histogram: [18, 1, 1, 1] [2023-08-24 10:18:01,283 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 10:18:01,283 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 10:18:01,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 10:18:01 BasicIcfg [2023-08-24 10:18:01,285 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 10:18:01,286 INFO L158 Benchmark]: Toolchain (without parser) took 769834.85ms. Allocated memory was 346.0MB in the beginning and 14.7GB in the end (delta: 14.3GB). Free memory was 322.2MB in the beginning and 7.1GB in the end (delta: -6.8GB). Peak memory consumption was 8.1GB. Max. memory is 16.0GB. [2023-08-24 10:18:01,286 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 346.0MB. Free memory was 323.7MB in the beginning and 323.6MB in the end (delta: 119.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:18:01,286 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.83ms. Allocated memory is still 346.0MB. Free memory was 321.7MB in the beginning and 310.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 10:18:01,286 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.62ms. Allocated memory is still 346.0MB. Free memory was 310.7MB in the beginning and 308.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 10:18:01,286 INFO L158 Benchmark]: Boogie Preprocessor took 43.21ms. Allocated memory is still 346.0MB. Free memory was 308.6MB in the beginning and 307.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 10:18:01,287 INFO L158 Benchmark]: RCFGBuilder took 536.03ms. Allocated memory is still 346.0MB. Free memory was 307.0MB in the beginning and 284.9MB in the end (delta: 22.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-24 10:18:01,287 INFO L158 Benchmark]: TraceAbstraction took 768959.38ms. Allocated memory was 346.0MB in the beginning and 14.7GB in the end (delta: 14.3GB). Free memory was 284.0MB in the beginning and 7.1GB in the end (delta: -6.8GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. [2023-08-24 10:18:01,288 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 346.0MB. Free memory was 323.7MB in the beginning and 323.6MB in the end (delta: 119.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 239.83ms. Allocated memory is still 346.0MB. Free memory was 321.7MB in the beginning and 310.7MB in the end (delta: 11.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 50.62ms. Allocated memory is still 346.0MB. Free memory was 310.7MB in the beginning and 308.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 43.21ms. Allocated memory is still 346.0MB. Free memory was 308.6MB in the beginning and 307.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 536.03ms. Allocated memory is still 346.0MB. Free memory was 307.0MB in the beginning and 284.9MB in the end (delta: 22.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 768959.38ms. Allocated memory was 346.0MB in the beginning and 14.7GB in the end (delta: 14.3GB). Free memory was 284.0MB in the beginning and 7.1GB in the end (delta: -6.8GB). Peak memory consumption was 8.0GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 114 PlacesBefore, 20 PlacesAfterwards, 118 TransitionsBefore, 16 TransitionsAfterwards, 792 CoEnabledTransitionPairs, 6 FixpointIterations, 66 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 13 ConcurrentYvCompositions, 8 ChoiceCompositions, 124 TotalNumberOfCompositions, 860 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 851, independent: 843, independent conditional: 0, independent unconditional: 843, dependent: 8, dependent conditional: 0, dependent unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 451, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 851, independent: 397, independent conditional: 0, independent unconditional: 397, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 451, unknown conditional: 0, unknown unconditional: 451] , Statistics on independence cache: Total cache size (in pairs): 17, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 26 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 22ms.. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 26 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 22ms.. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 26 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 22ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 146 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 768.9s, OverallIterations: 21, TraceHistogramMax: 4, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 659.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 71 mSolverCounterUnknown, 5498 SdHoareTripleChecker+Valid, 23.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5498 mSDsluCounter, 156 SdHoareTripleChecker+Invalid, 21.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 140 IncrementalHoareTripleChecker+Unchecked, 142 mSDsCounter, 681 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24739 IncrementalHoareTripleChecker+Invalid, 25631 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 681 mSolverCounterUnsat, 14 mSDtfsCounter, 24739 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1487 GetRequests, 379 SyntacticMatches, 13 SemanticMatches, 1095 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 35759 ImplicationChecksByTransitivity, 69.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=86777occurred in iteration=20, InterpolantAutomatonStates: 787, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.2s SatisfiabilityAnalysisTime, 74.4s InterpolantComputationTime, 758 NumberOfCodeBlocks, 758 NumberOfCodeBlocksAsserted, 59 NumberOfCheckSat, 1062 ConstructedInterpolants, 25 QuantifiedInterpolants, 28528 SizeOfPredicates, 346 NumberOfNonLiveVariables, 3613 ConjunctsInSsa, 628 ConjunctsInUnsatCore, 54 InterpolantComputations, 3 PerfectInterpolantSequences, 148/834 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