/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-more-nonblocking-counter-alt2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 09:33:50,624 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 09:33:50,690 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 09:33:50,702 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 09:33:50,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 09:33:50,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 09:33:50,731 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 09:33:50,731 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 09:33:50,732 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 09:33:50,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 09:33:50,736 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 09:33:50,737 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 09:33:50,737 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 09:33:50,738 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 09:33:50,738 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 09:33:50,738 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 09:33:50,738 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 09:33:50,739 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 09:33:50,739 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 09:33:50,739 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 09:33:50,739 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 09:33:50,740 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 09:33:50,740 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 09:33:50,740 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 09:33:50,740 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 09:33:50,741 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 09:33:50,741 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 09:33:50,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:33:50,741 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 09:33:50,741 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 09:33:50,742 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 09:33:50,742 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 09:33:50,742 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 09:33:50,742 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 09:33:50,742 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 09:33:50,743 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-24 09:33:51,011 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 09:33:51,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 09:33:51,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 09:33:51,044 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 09:33:51,044 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 09:33:51,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-24 09:33:52,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 09:33:52,198 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 09:33:52,198 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-24 09:33:52,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4294f5f75/09eb9463ce6b4eb19356d3e0c9f0ff4b/FLAGa40945fd8 [2023-08-24 09:33:52,214 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4294f5f75/09eb9463ce6b4eb19356d3e0c9f0ff4b [2023-08-24 09:33:52,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 09:33:52,216 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 09:33:52,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 09:33:52,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 09:33:52,219 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 09:33:52,219 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5176e9d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52, skipping insertion in model container [2023-08-24 09:33:52,220 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,232 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 09:33:52,328 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-24 09:33:52,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:33:52,335 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 09:33:52,356 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-nonblocking-counter-alt2.wvr.c[2147,2160] [2023-08-24 09:33:52,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 09:33:52,366 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:33:52,366 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 09:33:52,370 INFO L206 MainTranslator]: Completed translation [2023-08-24 09:33:52,370 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52 WrapperNode [2023-08-24 09:33:52,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 09:33:52,371 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 09:33:52,371 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 09:33:52,371 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 09:33:52,375 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,380 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,395 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 57 [2023-08-24 09:33:52,395 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 09:33:52,396 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 09:33:52,396 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 09:33:52,396 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 09:33:52,401 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,409 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,409 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,416 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,418 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,419 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,419 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,421 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 09:33:52,423 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 09:33:52,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 09:33:52,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 09:33:52,424 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (1/1) ... [2023-08-24 09:33:52,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 09:33:52,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:52,451 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 09:33:52,469 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 09:33:52,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 09:33:52,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 09:33:52,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 09:33:52,491 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 09:33:52,491 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 09:33:52,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 09:33:52,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 09:33:52,493 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 09:33:52,572 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 09:33:52,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 09:33:52,735 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 09:33:52,756 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 09:33:52,757 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 09:33:52,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:33:52 BoogieIcfgContainer [2023-08-24 09:33:52,758 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 09:33:52,760 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 09:33:52,760 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 09:33:52,762 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 09:33:52,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 09:33:52" (1/3) ... [2023-08-24 09:33:52,762 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b77fad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:33:52, skipping insertion in model container [2023-08-24 09:33:52,762 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 09:33:52" (2/3) ... [2023-08-24 09:33:52,763 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b77fad1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 09:33:52, skipping insertion in model container [2023-08-24 09:33:52,763 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 09:33:52" (3/3) ... [2023-08-24 09:33:52,763 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-nonblocking-counter-alt2.wvr.c [2023-08-24 09:33:52,774 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 09:33:52,774 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 09:33:52,774 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 09:33:52,817 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 09:33:52,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 176 flow [2023-08-24 09:33:52,868 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2023-08-24 09:33:52,868 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 09:33:52,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87 conditions, 78 events. 6/78 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-24 09:33:52,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 80 transitions, 176 flow [2023-08-24 09:33:52,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 70 transitions, 152 flow [2023-08-24 09:33:52,876 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 09:33:52,882 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 70 transitions, 152 flow [2023-08-24 09:33:52,883 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 70 transitions, 152 flow [2023-08-24 09:33:52,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 70 transitions, 152 flow [2023-08-24 09:33:52,899 INFO L124 PetriNetUnfolderBase]: 6/70 cut-off events. [2023-08-24 09:33:52,899 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 09:33:52,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 70 events. 6/70 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2023-08-24 09:33:52,900 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-08-24 09:33:54,467 INFO L134 LiptonReduction]: Checked pairs total: 468 [2023-08-24 09:33:54,468 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-24 09:33:54,478 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 09:33:54,482 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;@4469fcd2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 09:33:54,482 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 09:33:54,486 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 09:33:54,486 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 09:33:54,486 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 09:33:54,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:54,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:54,487 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 09:33:54,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:54,489 INFO L85 PathProgramCache]: Analyzing trace with hash -422608018, now seen corresponding path program 1 times [2023-08-24 09:33:54,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:54,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095676754] [2023-08-24 09:33:54,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:54,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:54,841 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 09:33:54,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:54,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095676754] [2023-08-24 09:33:54,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095676754] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:33:54,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:33:54,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 09:33:54,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987187257] [2023-08-24 09:33:54,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:33:54,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 09:33:54,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:54,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 09:33:54,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 09:33:54,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 144 [2023-08-24 09:33:54,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:54,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:54,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 144 [2023-08-24 09:33:54,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:54,937 INFO L124 PetriNetUnfolderBase]: 63/112 cut-off events. [2023-08-24 09:33:54,937 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-24 09:33:54,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 243 conditions, 112 events. 63/112 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 327 event pairs, 13 based on Foata normal form. 1/74 useless extension candidates. Maximal degree in co-relation 163. Up to 66 conditions per place. [2023-08-24 09:33:54,939 INFO L140 encePairwiseOnDemand]: 141/144 looper letters, 17 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-08-24 09:33:54,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 117 flow [2023-08-24 09:33:54,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 09:33:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 09:33:54,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-24 09:33:54,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2023-08-24 09:33:54,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-24 09:33:54,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-24 09:33:54,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:54,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-24 09:33:54,952 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:54,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:54,955 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:54,956 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 225 transitions. [2023-08-24 09:33:54,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 117 flow [2023-08-24 09:33:54,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 103 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 09:33:54,959 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 46 flow [2023-08-24 09:33:54,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-08-24 09:33:54,962 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-08-24 09:33:54,962 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 46 flow [2023-08-24 09:33:54,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:54,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:54,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:54,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 09:33:54,963 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 09:33:54,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1484082129, now seen corresponding path program 1 times [2023-08-24 09:33:54,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:54,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619457720] [2023-08-24 09:33:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:54,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:54,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:55,015 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 09:33:55,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:55,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619457720] [2023-08-24 09:33:55,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619457720] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:33:55,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:33:55,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:33:55,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610215495] [2023-08-24 09:33:55,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:33:55,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:33:55,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:55,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:33:55,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:33:55,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-24 09:33:55,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 46 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:55,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-24 09:33:55,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:55,067 INFO L124 PetriNetUnfolderBase]: 85/161 cut-off events. [2023-08-24 09:33:55,067 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-24 09:33:55,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 161 events. 85/161 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 528 event pairs, 37 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 174. Up to 106 conditions per place. [2023-08-24 09:33:55,068 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 26 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2023-08-24 09:33:55,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 30 transitions, 142 flow [2023-08-24 09:33:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:33:55,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:33:55,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 276 transitions. [2023-08-24 09:33:55,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791666666666667 [2023-08-24 09:33:55,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 276 transitions. [2023-08-24 09:33:55,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 276 transitions. [2023-08-24 09:33:55,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:55,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 276 transitions. [2023-08-24 09:33:55,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 69.0) internal successors, (276), 4 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,073 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,073 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 46 flow. Second operand 4 states and 276 transitions. [2023-08-24 09:33:55,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 30 transitions, 142 flow [2023-08-24 09:33:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 30 transitions, 139 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 09:33:55,074 INFO L231 Difference]: Finished difference. Result has 23 places, 18 transitions, 66 flow [2023-08-24 09:33:55,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=66, PETRI_PLACES=23, PETRI_TRANSITIONS=18} [2023-08-24 09:33:55,075 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-24 09:33:55,075 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 18 transitions, 66 flow [2023-08-24 09:33:55,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:55,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:55,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 09:33:55,075 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 09:33:55,076 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:55,076 INFO L85 PathProgramCache]: Analyzing trace with hash 569786481, now seen corresponding path program 2 times [2023-08-24 09:33:55,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:55,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267828845] [2023-08-24 09:33:55,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:55,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:55,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:55,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:55,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267828845] [2023-08-24 09:33:55,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267828845] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 09:33:55,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 09:33:55,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 09:33:55,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664940136] [2023-08-24 09:33:55,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 09:33:55,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 09:33:55,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:55,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 09:33:55,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 09:33:55,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-24 09:33:55,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:55,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-24 09:33:55,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:55,160 INFO L124 PetriNetUnfolderBase]: 73/134 cut-off events. [2023-08-24 09:33:55,161 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-08-24 09:33:55,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380 conditions, 134 events. 73/134 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 392 event pairs, 37 based on Foata normal form. 12/134 useless extension candidates. Maximal degree in co-relation 149. Up to 105 conditions per place. [2023-08-24 09:33:55,162 INFO L140 encePairwiseOnDemand]: 140/144 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-08-24 09:33:55,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 125 flow [2023-08-24 09:33:55,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 09:33:55,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 09:33:55,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 269 transitions. [2023-08-24 09:33:55,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670138888888889 [2023-08-24 09:33:55,163 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 269 transitions. [2023-08-24 09:33:55,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 269 transitions. [2023-08-24 09:33:55,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:55,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 269 transitions. [2023-08-24 09:33:55,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 67.25) internal successors, (269), 4 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,165 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 144.0) internal successors, (720), 5 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,165 INFO L175 Difference]: Start difference. First operand has 23 places, 18 transitions, 66 flow. Second operand 4 states and 269 transitions. [2023-08-24 09:33:55,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 23 transitions, 125 flow [2023-08-24 09:33:55,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 23 transitions, 113 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-24 09:33:55,167 INFO L231 Difference]: Finished difference. Result has 23 places, 17 transitions, 58 flow [2023-08-24 09:33:55,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=58, PETRI_PLACES=23, PETRI_TRANSITIONS=17} [2023-08-24 09:33:55,167 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-08-24 09:33:55,167 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 17 transitions, 58 flow [2023-08-24 09:33:55,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.25) internal successors, (261), 4 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:55,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 09:33:55,168 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 09:33:55,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash -522394925, now seen corresponding path program 1 times [2023-08-24 09:33:55,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110360737] [2023-08-24 09:33:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:55,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:55,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110360737] [2023-08-24 09:33:55,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110360737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:55,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632535219] [2023-08-24 09:33:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:55,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:55,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:55,473 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 09:33:55,521 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 09:33:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:55,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-24 09:33:55,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:55,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:55,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:55,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:55,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632535219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:55,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:55,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 2] total 9 [2023-08-24 09:33:55,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180577961] [2023-08-24 09:33:55,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:55,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 09:33:55,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:55,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 09:33:55,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2023-08-24 09:33:55,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:33:55,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 17 transitions, 58 flow. Second operand has 11 states, 11 states have (on average 56.45454545454545) internal successors, (621), 11 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:55,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:33:55,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:55,870 INFO L124 PetriNetUnfolderBase]: 187/339 cut-off events. [2023-08-24 09:33:55,870 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2023-08-24 09:33:55,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 339 events. 187/339 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1291 event pairs, 21 based on Foata normal form. 2/303 useless extension candidates. Maximal degree in co-relation 234. Up to 109 conditions per place. [2023-08-24 09:33:55,874 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 55 selfloop transitions, 17 changer transitions 18/90 dead transitions. [2023-08-24 09:33:55,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 90 transitions, 464 flow [2023-08-24 09:33:55,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:33:55,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:33:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 671 transitions. [2023-08-24 09:33:55,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2023-08-24 09:33:55,876 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 671 transitions. [2023-08-24 09:33:55,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 671 transitions. [2023-08-24 09:33:55,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:55,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 671 transitions. [2023-08-24 09:33:55,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.0) internal successors, (671), 11 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,881 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,881 INFO L175 Difference]: Start difference. First operand has 23 places, 17 transitions, 58 flow. Second operand 11 states and 671 transitions. [2023-08-24 09:33:55,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 90 transitions, 464 flow [2023-08-24 09:33:55,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 90 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 09:33:55,883 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 185 flow [2023-08-24 09:33:55,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=185, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-24 09:33:55,883 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 18 predicate places. [2023-08-24 09:33:55,884 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 185 flow [2023-08-24 09:33:55,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 56.45454545454545) internal successors, (621), 11 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:55,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:55,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:55,891 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 09:33:56,089 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 09:33:56,089 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 09:33:56,090 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1929455881, now seen corresponding path program 2 times [2023-08-24 09:33:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473692495] [2023-08-24 09:33:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:56,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:56,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:33:56,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473692495] [2023-08-24 09:33:56,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473692495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:56,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334291227] [2023-08-24 09:33:56,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:33:56,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:56,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:56,202 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 09:33:56,270 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 09:33:56,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:33:56,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:33:56,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-24 09:33:56,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:33:56,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:56,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:33:56,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334291227] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:56,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:56,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-08-24 09:33:56,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464214578] [2023-08-24 09:33:56,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:56,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 09:33:56,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:56,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 09:33:56,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-24 09:33:56,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 144 [2023-08-24 09:33:56,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 185 flow. Second operand has 8 states, 8 states have (on average 61.75) internal successors, (494), 8 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:56,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:56,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 144 [2023-08-24 09:33:56,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:56,481 INFO L124 PetriNetUnfolderBase]: 156/282 cut-off events. [2023-08-24 09:33:56,482 INFO L125 PetriNetUnfolderBase]: For 487/494 co-relation queries the response was YES. [2023-08-24 09:33:56,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1033 conditions, 282 events. 156/282 cut-off events. For 487/494 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 976 event pairs, 28 based on Foata normal form. 21/303 useless extension candidates. Maximal degree in co-relation 928. Up to 233 conditions per place. [2023-08-24 09:33:56,483 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 38 selfloop transitions, 10 changer transitions 0/49 dead transitions. [2023-08-24 09:33:56,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 49 transitions, 370 flow [2023-08-24 09:33:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 09:33:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 09:33:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 387 transitions. [2023-08-24 09:33:56,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479166666666667 [2023-08-24 09:33:56,485 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 387 transitions. [2023-08-24 09:33:56,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 387 transitions. [2023-08-24 09:33:56,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:56,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 387 transitions. [2023-08-24 09:33:56,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.5) internal successors, (387), 6 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:56,487 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 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 09:33:56,487 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 144.0) internal successors, (1008), 7 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 09:33:56,487 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 185 flow. Second operand 6 states and 387 transitions. [2023-08-24 09:33:56,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 49 transitions, 370 flow [2023-08-24 09:33:56,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 342 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-24 09:33:56,490 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 246 flow [2023-08-24 09:33:56,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2023-08-24 09:33:56,491 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-08-24 09:33:56,491 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 246 flow [2023-08-24 09:33:56,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 61.75) internal successors, (494), 8 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:56,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:56,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:56,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-24 09:33:56,695 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 09:33:56,696 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 09:33:56,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:56,696 INFO L85 PathProgramCache]: Analyzing trace with hash -852603112, now seen corresponding path program 3 times [2023-08-24 09:33:56,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:56,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817005459] [2023-08-24 09:33:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:56,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:56,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817005459] [2023-08-24 09:33:56,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817005459] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:56,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264044803] [2023-08-24 09:33:56,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:33:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:56,825 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 09:33:56,850 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 09:33:56,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:33:56,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:33:56,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 09:33:56,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:56,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:57,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:57,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264044803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:57,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:57,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 09:33:57,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798835293] [2023-08-24 09:33:57,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:57,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:33:57,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:33:57,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:33:57,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:33:57,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 246 flow. Second operand has 14 states, 14 states have (on average 57.214285714285715) internal successors, (801), 14 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:57,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:57,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:33:57,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:57,538 INFO L124 PetriNetUnfolderBase]: 269/461 cut-off events. [2023-08-24 09:33:57,538 INFO L125 PetriNetUnfolderBase]: For 1269/1269 co-relation queries the response was YES. [2023-08-24 09:33:57,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1856 conditions, 461 events. 269/461 cut-off events. For 1269/1269 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1789 event pairs, 3 based on Foata normal form. 14/475 useless extension candidates. Maximal degree in co-relation 1751. Up to 153 conditions per place. [2023-08-24 09:33:57,541 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 65 selfloop transitions, 51 changer transitions 20/136 dead transitions. [2023-08-24 09:33:57,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 136 transitions, 1059 flow [2023-08-24 09:33:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:33:57,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:33:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1267 transitions. [2023-08-24 09:33:57,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41898148148148145 [2023-08-24 09:33:57,544 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1267 transitions. [2023-08-24 09:33:57,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1267 transitions. [2023-08-24 09:33:57,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:57,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1267 transitions. [2023-08-24 09:33:57,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.333333333333336) internal successors, (1267), 21 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:57,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:57,550 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:57,550 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 246 flow. Second operand 21 states and 1267 transitions. [2023-08-24 09:33:57,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 136 transitions, 1059 flow [2023-08-24 09:33:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 136 transitions, 991 flow, removed 32 selfloop flow, removed 1 redundant places. [2023-08-24 09:33:57,554 INFO L231 Difference]: Finished difference. Result has 69 places, 71 transitions, 602 flow [2023-08-24 09:33:57,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=602, PETRI_PLACES=69, PETRI_TRANSITIONS=71} [2023-08-24 09:33:57,555 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-08-24 09:33:57,555 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 71 transitions, 602 flow [2023-08-24 09:33:57,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 57.214285714285715) internal successors, (801), 14 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:57,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:57,555 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:57,571 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 09:33:57,771 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 09:33:57,772 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 09:33:57,772 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:57,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1893478558, now seen corresponding path program 4 times [2023-08-24 09:33:57,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:57,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751734087] [2023-08-24 09:33:57,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:57,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:57,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751734087] [2023-08-24 09:33:57,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751734087] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:57,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40288678] [2023-08-24 09:33:57,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:33:57,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:57,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:57,924 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 09:33:57,948 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 09:33:57,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:33:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:33:57,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 09:33:57,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:58,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:58,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40288678] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:58,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:58,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-08-24 09:33:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98581350] [2023-08-24 09:33:58,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:33:58,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:33:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:33:58,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:33:58,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 71 transitions, 602 flow. Second operand has 16 states, 16 states have (on average 57.0625) internal successors, (913), 16 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:58,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:58,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:33:58,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:58,676 INFO L124 PetriNetUnfolderBase]: 293/495 cut-off events. [2023-08-24 09:33:58,676 INFO L125 PetriNetUnfolderBase]: For 4423/4423 co-relation queries the response was YES. [2023-08-24 09:33:58,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2660 conditions, 495 events. 293/495 cut-off events. For 4423/4423 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1853 event pairs, 6 based on Foata normal form. 22/517 useless extension candidates. Maximal degree in co-relation 2557. Up to 171 conditions per place. [2023-08-24 09:33:58,680 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 87 selfloop transitions, 71 changer transitions 1/159 dead transitions. [2023-08-24 09:33:58,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 159 transitions, 1616 flow [2023-08-24 09:33:58,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 09:33:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 09:33:58,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1265 transitions. [2023-08-24 09:33:58,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4183201058201058 [2023-08-24 09:33:58,683 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1265 transitions. [2023-08-24 09:33:58,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1265 transitions. [2023-08-24 09:33:58,683 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:58,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1265 transitions. [2023-08-24 09:33:58,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.23809523809524) internal successors, (1265), 21 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:58,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:58,689 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 144.0) internal successors, (3168), 22 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:58,689 INFO L175 Difference]: Start difference. First operand has 69 places, 71 transitions, 602 flow. Second operand 21 states and 1265 transitions. [2023-08-24 09:33:58,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 159 transitions, 1616 flow [2023-08-24 09:33:58,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 159 transitions, 1333 flow, removed 130 selfloop flow, removed 7 redundant places. [2023-08-24 09:33:58,721 INFO L231 Difference]: Finished difference. Result has 90 places, 110 transitions, 1067 flow [2023-08-24 09:33:58,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1067, PETRI_PLACES=90, PETRI_TRANSITIONS=110} [2023-08-24 09:33:58,721 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-08-24 09:33:58,721 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 110 transitions, 1067 flow [2023-08-24 09:33:58,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.0625) internal successors, (913), 16 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:58,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:58,722 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:58,745 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 09:33:58,927 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 09:33:58,927 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 09:33:58,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:58,928 INFO L85 PathProgramCache]: Analyzing trace with hash -75234324, now seen corresponding path program 5 times [2023-08-24 09:33:58,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:58,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219512180] [2023-08-24 09:33:58,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:58,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:33:58,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:33:59,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:59,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:33:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219512180] [2023-08-24 09:33:59,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219512180] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:33:59,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670391194] [2023-08-24 09:33:59,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:33:59,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:33:59,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:33:59,089 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 09:33:59,121 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 09:33:59,156 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:33:59,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:33:59,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-24 09:33:59,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:33:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:59,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:33:59,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:33:59,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670391194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:33:59,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:33:59,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-08-24 09:33:59,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161722459] [2023-08-24 09:33:59,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:33:59,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:33:59,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:33:59,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:33:59,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:33:59,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 144 [2023-08-24 09:33:59,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 110 transitions, 1067 flow. Second operand has 14 states, 14 states have (on average 59.857142857142854) internal successors, (838), 14 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:59,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:33:59,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 144 [2023-08-24 09:33:59,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:33:59,745 INFO L124 PetriNetUnfolderBase]: 370/633 cut-off events. [2023-08-24 09:33:59,745 INFO L125 PetriNetUnfolderBase]: For 8588/8588 co-relation queries the response was YES. [2023-08-24 09:33:59,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3716 conditions, 633 events. 370/633 cut-off events. For 8588/8588 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2615 event pairs, 28 based on Foata normal form. 18/651 useless extension candidates. Maximal degree in co-relation 3612. Up to 235 conditions per place. [2023-08-24 09:33:59,751 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 95 selfloop transitions, 89 changer transitions 2/186 dead transitions. [2023-08-24 09:33:59,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 186 transitions, 2045 flow [2023-08-24 09:33:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 09:33:59,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 09:33:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 942 transitions. [2023-08-24 09:33:59,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2023-08-24 09:33:59,753 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 942 transitions. [2023-08-24 09:33:59,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 942 transitions. [2023-08-24 09:33:59,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:33:59,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 942 transitions. [2023-08-24 09:33:59,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 62.8) internal successors, (942), 15 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:59,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 144.0) internal successors, (2304), 16 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:59,757 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 144.0) internal successors, (2304), 16 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:59,758 INFO L175 Difference]: Start difference. First operand has 90 places, 110 transitions, 1067 flow. Second operand 15 states and 942 transitions. [2023-08-24 09:33:59,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 186 transitions, 2045 flow [2023-08-24 09:33:59,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 186 transitions, 1813 flow, removed 107 selfloop flow, removed 3 redundant places. [2023-08-24 09:33:59,783 INFO L231 Difference]: Finished difference. Result has 107 places, 140 transitions, 1475 flow [2023-08-24 09:33:59,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1475, PETRI_PLACES=107, PETRI_TRANSITIONS=140} [2023-08-24 09:33:59,784 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-08-24 09:33:59,784 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 140 transitions, 1475 flow [2023-08-24 09:33:59,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.857142857142854) internal successors, (838), 14 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:33:59,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:33:59,785 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:33:59,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 09:33:59,989 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 09:33:59,990 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 09:33:59,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:33:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1305465312, now seen corresponding path program 6 times [2023-08-24 09:33:59,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:33:59,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649117726] [2023-08-24 09:33:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:33:59,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:00,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:00,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:00,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:00,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649117726] [2023-08-24 09:34:00,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649117726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:00,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053217623] [2023-08-24 09:34:00,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:34:00,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:00,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:00,201 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 09:34:00,202 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 09:34:00,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 09:34:00,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:00,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:34:00,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:00,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:00,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053217623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:00,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:00,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2023-08-24 09:34:00,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059986702] [2023-08-24 09:34:00,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:00,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:34:00,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:00,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:34:00,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:34:00,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 144 [2023-08-24 09:34:00,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 140 transitions, 1475 flow. Second operand has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:00,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:00,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 144 [2023-08-24 09:34:00,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:01,111 INFO L124 PetriNetUnfolderBase]: 391/698 cut-off events. [2023-08-24 09:34:01,111 INFO L125 PetriNetUnfolderBase]: For 12856/12856 co-relation queries the response was YES. [2023-08-24 09:34:01,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4167 conditions, 698 events. 391/698 cut-off events. For 12856/12856 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3116 event pairs, 31 based on Foata normal form. 26/724 useless extension candidates. Maximal degree in co-relation 4041. Up to 195 conditions per place. [2023-08-24 09:34:01,117 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 101 selfloop transitions, 112 changer transitions 4/217 dead transitions. [2023-08-24 09:34:01,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 217 transitions, 2398 flow [2023-08-24 09:34:01,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:34:01,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:34:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1688 transitions. [2023-08-24 09:34:01,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43415637860082307 [2023-08-24 09:34:01,120 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1688 transitions. [2023-08-24 09:34:01,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1688 transitions. [2023-08-24 09:34:01,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:01,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1688 transitions. [2023-08-24 09:34:01,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 62.51851851851852) internal successors, (1688), 27 states have internal predecessors, (1688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,127 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,127 INFO L175 Difference]: Start difference. First operand has 107 places, 140 transitions, 1475 flow. Second operand 27 states and 1688 transitions. [2023-08-24 09:34:01,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 217 transitions, 2398 flow [2023-08-24 09:34:01,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 217 transitions, 2124 flow, removed 125 selfloop flow, removed 4 redundant places. [2023-08-24 09:34:01,191 INFO L231 Difference]: Finished difference. Result has 131 places, 152 transitions, 1671 flow [2023-08-24 09:34:01,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1671, PETRI_PLACES=131, PETRI_TRANSITIONS=152} [2023-08-24 09:34:01,191 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 111 predicate places. [2023-08-24 09:34:01,191 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 152 transitions, 1671 flow [2023-08-24 09:34:01,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.142857142857146) internal successors, (842), 14 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:01,192 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:01,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-24 09:34:01,396 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 09:34:01,397 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 09:34:01,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:01,397 INFO L85 PathProgramCache]: Analyzing trace with hash -713596170, now seen corresponding path program 7 times [2023-08-24 09:34:01,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:01,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045654310] [2023-08-24 09:34:01,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:01,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:01,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:01,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:01,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045654310] [2023-08-24 09:34:01,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045654310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:01,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386843937] [2023-08-24 09:34:01,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:34:01,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:01,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:01,507 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 09:34:01,509 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 09:34:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:01,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 09:34:01,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:01,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:01,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:01,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386843937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:01,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:01,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-24 09:34:01,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439557880] [2023-08-24 09:34:01,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:01,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:34:01,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:34:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:34:01,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:34:01,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 152 transitions, 1671 flow. Second operand has 15 states, 15 states have (on average 57.4) internal successors, (861), 15 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:01,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:01,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:34:01,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:02,236 INFO L124 PetriNetUnfolderBase]: 536/951 cut-off events. [2023-08-24 09:34:02,236 INFO L125 PetriNetUnfolderBase]: For 11763/11763 co-relation queries the response was YES. [2023-08-24 09:34:02,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5988 conditions, 951 events. 536/951 cut-off events. For 11763/11763 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 4510 event pairs, 35 based on Foata normal form. 28/979 useless extension candidates. Maximal degree in co-relation 5849. Up to 603 conditions per place. [2023-08-24 09:34:02,242 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 175 selfloop transitions, 99 changer transitions 7/281 dead transitions. [2023-08-24 09:34:02,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 281 transitions, 3557 flow [2023-08-24 09:34:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 09:34:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 09:34:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1337 transitions. [2023-08-24 09:34:02,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220328282828283 [2023-08-24 09:34:02,245 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1337 transitions. [2023-08-24 09:34:02,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1337 transitions. [2023-08-24 09:34:02,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:02,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1337 transitions. [2023-08-24 09:34:02,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 60.77272727272727) internal successors, (1337), 22 states have internal predecessors, (1337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:02,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:02,250 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:02,250 INFO L175 Difference]: Start difference. First operand has 131 places, 152 transitions, 1671 flow. Second operand 22 states and 1337 transitions. [2023-08-24 09:34:02,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 281 transitions, 3557 flow [2023-08-24 09:34:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 281 transitions, 3270 flow, removed 67 selfloop flow, removed 13 redundant places. [2023-08-24 09:34:02,279 INFO L231 Difference]: Finished difference. Result has 155 places, 215 transitions, 2763 flow [2023-08-24 09:34:02,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=1455, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2763, PETRI_PLACES=155, PETRI_TRANSITIONS=215} [2023-08-24 09:34:02,280 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-08-24 09:34:02,280 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 215 transitions, 2763 flow [2023-08-24 09:34:02,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.4) internal successors, (861), 15 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:02,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:02,281 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:02,303 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 09:34:02,504 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 09:34:02,504 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 09:34:02,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash -639081930, now seen corresponding path program 8 times [2023-08-24 09:34:02,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:02,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211285899] [2023-08-24 09:34:02,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:02,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:02,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:02,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211285899] [2023-08-24 09:34:02,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211285899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:02,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372103001] [2023-08-24 09:34:02,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:34:02,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:02,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:02,612 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 09:34:02,653 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 09:34:02,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:34:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:02,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 09:34:02,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:02,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:02,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:02,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372103001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:02,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:02,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-24 09:34:02,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418318485] [2023-08-24 09:34:02,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:02,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 09:34:02,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:02,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 09:34:02,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-08-24 09:34:02,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:34:02,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 215 transitions, 2763 flow. Second operand has 15 states, 15 states have (on average 57.266666666666666) internal successors, (859), 15 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:02,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:02,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:34:02,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:03,442 INFO L124 PetriNetUnfolderBase]: 672/1201 cut-off events. [2023-08-24 09:34:03,442 INFO L125 PetriNetUnfolderBase]: For 23098/23098 co-relation queries the response was YES. [2023-08-24 09:34:03,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8628 conditions, 1201 events. 672/1201 cut-off events. For 23098/23098 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6163 event pairs, 28 based on Foata normal form. 24/1225 useless extension candidates. Maximal degree in co-relation 8413. Up to 735 conditions per place. [2023-08-24 09:34:03,451 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 210 selfloop transitions, 138 changer transitions 5/353 dead transitions. [2023-08-24 09:34:03,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 353 transitions, 5025 flow [2023-08-24 09:34:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 09:34:03,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 09:34:03,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1685 transitions. [2023-08-24 09:34:03,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41790674603174605 [2023-08-24 09:34:03,453 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1685 transitions. [2023-08-24 09:34:03,453 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1685 transitions. [2023-08-24 09:34:03,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:03,454 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1685 transitions. [2023-08-24 09:34:03,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 60.17857142857143) internal successors, (1685), 28 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:03,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:03,459 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 144.0) internal successors, (4176), 29 states have internal predecessors, (4176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:03,459 INFO L175 Difference]: Start difference. First operand has 155 places, 215 transitions, 2763 flow. Second operand 28 states and 1685 transitions. [2023-08-24 09:34:03,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 353 transitions, 5025 flow [2023-08-24 09:34:03,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 353 transitions, 4552 flow, removed 230 selfloop flow, removed 2 redundant places. [2023-08-24 09:34:03,536 INFO L231 Difference]: Finished difference. Result has 196 places, 273 transitions, 3846 flow [2023-08-24 09:34:03,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=2338, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3846, PETRI_PLACES=196, PETRI_TRANSITIONS=273} [2023-08-24 09:34:03,537 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-08-24 09:34:03,537 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 273 transitions, 3846 flow [2023-08-24 09:34:03,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.266666666666666) internal successors, (859), 15 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:03,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:03,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:03,545 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 09:34:03,745 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 09:34:03,745 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 09:34:03,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:03,745 INFO L85 PathProgramCache]: Analyzing trace with hash -521187742, now seen corresponding path program 9 times [2023-08-24 09:34:03,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887160368] [2023-08-24 09:34:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:03,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:03,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:03,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887160368] [2023-08-24 09:34:03,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887160368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:03,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089252241] [2023-08-24 09:34:03,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:34:03,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:03,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:03,892 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 09:34:03,893 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 09:34:03,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:34:03,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:03,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:34:03,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:04,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089252241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:04,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:04,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-24 09:34:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770272129] [2023-08-24 09:34:04,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:04,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:34:04,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:34:04,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:34:04,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 144 [2023-08-24 09:34:04,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 273 transitions, 3846 flow. Second operand has 14 states, 14 states have (on average 59.857142857142854) internal successors, (838), 14 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:04,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:04,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 144 [2023-08-24 09:34:04,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:04,631 INFO L124 PetriNetUnfolderBase]: 801/1386 cut-off events. [2023-08-24 09:34:04,632 INFO L125 PetriNetUnfolderBase]: For 36213/36213 co-relation queries the response was YES. [2023-08-24 09:34:04,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11463 conditions, 1386 events. 801/1386 cut-off events. For 36213/36213 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7113 event pairs, 166 based on Foata normal form. 22/1408 useless extension candidates. Maximal degree in co-relation 11174. Up to 1050 conditions per place. [2023-08-24 09:34:04,645 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 207 selfloop transitions, 139 changer transitions 10/356 dead transitions. [2023-08-24 09:34:04,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 356 transitions, 6016 flow [2023-08-24 09:34:04,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 09:34:04,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 09:34:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1060 transitions. [2023-08-24 09:34:04,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43300653594771243 [2023-08-24 09:34:04,647 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1060 transitions. [2023-08-24 09:34:04,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1060 transitions. [2023-08-24 09:34:04,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:04,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1060 transitions. [2023-08-24 09:34:04,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 62.35294117647059) internal successors, (1060), 17 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:04,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:04,651 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 144.0) internal successors, (2592), 18 states have internal predecessors, (2592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:04,651 INFO L175 Difference]: Start difference. First operand has 196 places, 273 transitions, 3846 flow. Second operand 17 states and 1060 transitions. [2023-08-24 09:34:04,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 356 transitions, 6016 flow [2023-08-24 09:34:04,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 356 transitions, 5148 flow, removed 422 selfloop flow, removed 4 redundant places. [2023-08-24 09:34:04,794 INFO L231 Difference]: Finished difference. Result has 218 places, 323 transitions, 4649 flow [2023-08-24 09:34:04,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=3292, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4649, PETRI_PLACES=218, PETRI_TRANSITIONS=323} [2023-08-24 09:34:04,794 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 198 predicate places. [2023-08-24 09:34:04,795 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 323 transitions, 4649 flow [2023-08-24 09:34:04,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 59.857142857142854) internal successors, (838), 14 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:04,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:04,795 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:04,804 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 09:34:04,999 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 09:34:05,000 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 09:34:05,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:05,000 INFO L85 PathProgramCache]: Analyzing trace with hash 322071712, now seen corresponding path program 10 times [2023-08-24 09:34:05,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:05,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711399079] [2023-08-24 09:34:05,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:05,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:05,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:05,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:05,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711399079] [2023-08-24 09:34:05,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711399079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:05,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929938538] [2023-08-24 09:34:05,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:34:05,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:05,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:05,128 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 09:34:05,130 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 09:34:05,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:34:05,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:05,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 09:34:05,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:05,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:05,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:05,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929938538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:05,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:05,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-24 09:34:05,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96588638] [2023-08-24 09:34:05,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 09:34:05,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 09:34:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-24 09:34:05,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 144 [2023-08-24 09:34:05,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 323 transitions, 4649 flow. Second operand has 14 states, 14 states have (on average 60.0) internal successors, (840), 14 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:05,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:05,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 144 [2023-08-24 09:34:05,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:05,861 INFO L124 PetriNetUnfolderBase]: 807/1422 cut-off events. [2023-08-24 09:34:05,861 INFO L125 PetriNetUnfolderBase]: For 37997/37997 co-relation queries the response was YES. [2023-08-24 09:34:05,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11341 conditions, 1422 events. 807/1422 cut-off events. For 37997/37997 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 7453 event pairs, 150 based on Foata normal form. 24/1446 useless extension candidates. Maximal degree in co-relation 11170. Up to 950 conditions per place. [2023-08-24 09:34:05,874 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 207 selfloop transitions, 167 changer transitions 1/375 dead transitions. [2023-08-24 09:34:05,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 375 transitions, 5727 flow [2023-08-24 09:34:05,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 09:34:05,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 09:34:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1252 transitions. [2023-08-24 09:34:05,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43472222222222223 [2023-08-24 09:34:05,876 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1252 transitions. [2023-08-24 09:34:05,876 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1252 transitions. [2023-08-24 09:34:05,877 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:05,877 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1252 transitions. [2023-08-24 09:34:05,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 62.6) internal successors, (1252), 20 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:05,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 144.0) internal successors, (3024), 21 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:05,881 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 144.0) internal successors, (3024), 21 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:05,881 INFO L175 Difference]: Start difference. First operand has 218 places, 323 transitions, 4649 flow. Second operand 20 states and 1252 transitions. [2023-08-24 09:34:05,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 375 transitions, 5727 flow [2023-08-24 09:34:06,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 375 transitions, 5428 flow, removed 131 selfloop flow, removed 7 redundant places. [2023-08-24 09:34:06,042 INFO L231 Difference]: Finished difference. Result has 228 places, 334 transitions, 4847 flow [2023-08-24 09:34:06,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=4192, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4847, PETRI_PLACES=228, PETRI_TRANSITIONS=334} [2023-08-24 09:34:06,042 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-08-24 09:34:06,043 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 334 transitions, 4847 flow [2023-08-24 09:34:06,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 60.0) internal successors, (840), 14 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:06,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:06,043 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:06,062 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 09:34:06,248 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 09:34:06,248 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 09:34:06,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:06,248 INFO L85 PathProgramCache]: Analyzing trace with hash -512646798, now seen corresponding path program 11 times [2023-08-24 09:34:06,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:06,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903909387] [2023-08-24 09:34:06,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:06,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:06,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:06,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:06,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903909387] [2023-08-24 09:34:06,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903909387] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326460035] [2023-08-24 09:34:06,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:34:06,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:06,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:06,455 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 09:34:06,485 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 09:34:06,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:34:06,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:06,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-24 09:34:06,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:06,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:06,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:08,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:34:08,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326460035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:08,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:08,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5] total 11 [2023-08-24 09:34:08,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897002157] [2023-08-24 09:34:08,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:08,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-24 09:34:08,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:08,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-24 09:34:08,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2023-08-24 09:34:08,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 144 [2023-08-24 09:34:08,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 334 transitions, 4847 flow. Second operand has 13 states, 13 states have (on average 64.23076923076923) internal successors, (835), 13 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:08,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:08,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 144 [2023-08-24 09:34:08,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:08,495 INFO L124 PetriNetUnfolderBase]: 1054/1929 cut-off events. [2023-08-24 09:34:08,495 INFO L125 PetriNetUnfolderBase]: For 44687/44687 co-relation queries the response was YES. [2023-08-24 09:34:08,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15566 conditions, 1929 events. 1054/1929 cut-off events. For 44687/44687 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11404 event pairs, 47 based on Foata normal form. 3/1932 useless extension candidates. Maximal degree in co-relation 15085. Up to 959 conditions per place. [2023-08-24 09:34:08,509 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 295 selfloop transitions, 124 changer transitions 62/484 dead transitions. [2023-08-24 09:34:08,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 484 transitions, 7980 flow [2023-08-24 09:34:08,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 09:34:08,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 09:34:08,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 762 transitions. [2023-08-24 09:34:08,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2023-08-24 09:34:08,511 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 762 transitions. [2023-08-24 09:34:08,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 762 transitions. [2023-08-24 09:34:08,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:08,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 762 transitions. [2023-08-24 09:34:08,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 69.27272727272727) internal successors, (762), 11 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:08,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:08,513 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 144.0) internal successors, (1728), 12 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:08,514 INFO L175 Difference]: Start difference. First operand has 228 places, 334 transitions, 4847 flow. Second operand 11 states and 762 transitions. [2023-08-24 09:34:08,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 484 transitions, 7980 flow [2023-08-24 09:34:08,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 484 transitions, 7706 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-08-24 09:34:08,688 INFO L231 Difference]: Finished difference. Result has 233 places, 362 transitions, 5644 flow [2023-08-24 09:34:08,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=4634, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5644, PETRI_PLACES=233, PETRI_TRANSITIONS=362} [2023-08-24 09:34:08,689 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 213 predicate places. [2023-08-24 09:34:08,689 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 362 transitions, 5644 flow [2023-08-24 09:34:08,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 64.23076923076923) internal successors, (835), 13 states have internal predecessors, (835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:08,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:08,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:08,694 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 09:34:08,894 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 09:34:08,895 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 09:34:08,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:08,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1334483388, now seen corresponding path program 12 times [2023-08-24 09:34:08,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:08,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285479676] [2023-08-24 09:34:08,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:08,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:34:09,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:09,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285479676] [2023-08-24 09:34:09,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285479676] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:09,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459142391] [2023-08-24 09:34:09,091 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:34:09,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:09,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:09,092 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 09:34:09,095 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 09:34:09,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:34:09,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:09,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:34:09,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:09,240 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:34:09,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:34:09,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459142391] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:09,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:09,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 15 [2023-08-24 09:34:09,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211978714] [2023-08-24 09:34:09,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:09,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 09:34:09,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:09,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 09:34:09,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-08-24 09:34:09,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:09,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 362 transitions, 5644 flow. Second operand has 16 states, 16 states have (on average 55.6875) internal successors, (891), 16 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:09,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:09,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:09,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:10,101 INFO L124 PetriNetUnfolderBase]: 968/1801 cut-off events. [2023-08-24 09:34:10,101 INFO L125 PetriNetUnfolderBase]: For 51901/51901 co-relation queries the response was YES. [2023-08-24 09:34:10,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15467 conditions, 1801 events. 968/1801 cut-off events. For 51901/51901 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10652 event pairs, 49 based on Foata normal form. 32/1833 useless extension candidates. Maximal degree in co-relation 15216. Up to 1442 conditions per place. [2023-08-24 09:34:10,117 INFO L140 encePairwiseOnDemand]: 138/144 looper letters, 332 selfloop transitions, 79 changer transitions 26/437 dead transitions. [2023-08-24 09:34:10,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 437 transitions, 7722 flow [2023-08-24 09:34:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 09:34:10,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 09:34:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1051 transitions. [2023-08-24 09:34:10,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054783950617284 [2023-08-24 09:34:10,119 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1051 transitions. [2023-08-24 09:34:10,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1051 transitions. [2023-08-24 09:34:10,119 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:10,119 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1051 transitions. [2023-08-24 09:34:10,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 58.388888888888886) internal successors, (1051), 18 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:10,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:10,122 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 144.0) internal successors, (2736), 19 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:10,123 INFO L175 Difference]: Start difference. First operand has 233 places, 362 transitions, 5644 flow. Second operand 18 states and 1051 transitions. [2023-08-24 09:34:10,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 437 transitions, 7722 flow [2023-08-24 09:34:10,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 437 transitions, 7533 flow, removed 48 selfloop flow, removed 10 redundant places. [2023-08-24 09:34:10,337 INFO L231 Difference]: Finished difference. Result has 244 places, 370 transitions, 5952 flow [2023-08-24 09:34:10,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5455, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=5952, PETRI_PLACES=244, PETRI_TRANSITIONS=370} [2023-08-24 09:34:10,338 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 224 predicate places. [2023-08-24 09:34:10,338 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 370 transitions, 5952 flow [2023-08-24 09:34:10,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 55.6875) internal successors, (891), 16 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:10,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:10,338 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:10,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 09:34:10,542 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 09:34:10,543 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 09:34:10,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:10,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1978249700, now seen corresponding path program 13 times [2023-08-24 09:34:10,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:10,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156120710] [2023-08-24 09:34:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:10,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:10,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156120710] [2023-08-24 09:34:10,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156120710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:10,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813085623] [2023-08-24 09:34:10,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:34:10,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:10,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:10,873 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 09:34:10,881 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 09:34:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:10,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:34:10,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:11,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:11,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:11,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813085623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:11,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:11,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2023-08-24 09:34:11,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589214036] [2023-08-24 09:34:11,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:11,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:34:11,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:11,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:34:11,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:34:11,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:34:11,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 370 transitions, 5952 flow. Second operand has 20 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:11,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:11,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:34:11,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:13,213 INFO L124 PetriNetUnfolderBase]: 1070/1963 cut-off events. [2023-08-24 09:34:13,213 INFO L125 PetriNetUnfolderBase]: For 56944/56944 co-relation queries the response was YES. [2023-08-24 09:34:13,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17536 conditions, 1963 events. 1070/1963 cut-off events. For 56944/56944 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 11695 event pairs, 50 based on Foata normal form. 26/1989 useless extension candidates. Maximal degree in co-relation 17245. Up to 1423 conditions per place. [2023-08-24 09:34:13,229 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 254 selfloop transitions, 204 changer transitions 6/464 dead transitions. [2023-08-24 09:34:13,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 464 transitions, 8506 flow [2023-08-24 09:34:13,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:34:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:34:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1594 transitions. [2023-08-24 09:34:13,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40997942386831276 [2023-08-24 09:34:13,231 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1594 transitions. [2023-08-24 09:34:13,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1594 transitions. [2023-08-24 09:34:13,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:13,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1594 transitions. [2023-08-24 09:34:13,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 59.03703703703704) internal successors, (1594), 27 states have internal predecessors, (1594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:13,236 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:13,236 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:13,236 INFO L175 Difference]: Start difference. First operand has 244 places, 370 transitions, 5952 flow. Second operand 27 states and 1594 transitions. [2023-08-24 09:34:13,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 464 transitions, 8506 flow [2023-08-24 09:34:13,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 464 transitions, 8194 flow, removed 57 selfloop flow, removed 15 redundant places. [2023-08-24 09:34:13,475 INFO L231 Difference]: Finished difference. Result has 265 places, 415 transitions, 7559 flow [2023-08-24 09:34:13,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=5625, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7559, PETRI_PLACES=265, PETRI_TRANSITIONS=415} [2023-08-24 09:34:13,475 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-08-24 09:34:13,476 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 415 transitions, 7559 flow [2023-08-24 09:34:13,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.75) internal successors, (1135), 20 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:13,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:13,476 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:13,480 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 09:34:13,680 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 09:34:13,680 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 09:34:13,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1473458142, now seen corresponding path program 14 times [2023-08-24 09:34:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:13,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626800727] [2023-08-24 09:34:13,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:13,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626800727] [2023-08-24 09:34:13,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626800727] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120662489] [2023-08-24 09:34:13,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:34:13,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:13,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:13,885 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 09:34:13,927 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 09:34:13,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:34:13,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:13,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:34:13,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:14,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:14,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:14,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120662489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:14,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:14,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 09:34:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48109613] [2023-08-24 09:34:14,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:14,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:34:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:34:14,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:34:14,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:34:14,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 415 transitions, 7559 flow. Second operand has 22 states, 22 states have (on average 56.95454545454545) internal successors, (1253), 22 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:14,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:14,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:34:14,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:15,770 INFO L124 PetriNetUnfolderBase]: 1210/2161 cut-off events. [2023-08-24 09:34:15,770 INFO L125 PetriNetUnfolderBase]: For 82100/82100 co-relation queries the response was YES. [2023-08-24 09:34:15,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21230 conditions, 2161 events. 1210/2161 cut-off events. For 82100/82100 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 12740 event pairs, 32 based on Foata normal form. 46/2207 useless extension candidates. Maximal degree in co-relation 20918. Up to 824 conditions per place. [2023-08-24 09:34:15,811 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 223 selfloop transitions, 285 changer transitions 1/509 dead transitions. [2023-08-24 09:34:15,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 509 transitions, 10282 flow [2023-08-24 09:34:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 09:34:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 09:34:15,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1310 transitions. [2023-08-24 09:34:15,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.413510101010101 [2023-08-24 09:34:15,818 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1310 transitions. [2023-08-24 09:34:15,818 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1310 transitions. [2023-08-24 09:34:15,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:15,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1310 transitions. [2023-08-24 09:34:15,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 59.54545454545455) internal successors, (1310), 22 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:15,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:15,845 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 144.0) internal successors, (3312), 23 states have internal predecessors, (3312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:15,845 INFO L175 Difference]: Start difference. First operand has 265 places, 415 transitions, 7559 flow. Second operand 22 states and 1310 transitions. [2023-08-24 09:34:15,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 509 transitions, 10282 flow [2023-08-24 09:34:16,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 509 transitions, 9586 flow, removed 294 selfloop flow, removed 17 redundant places. [2023-08-24 09:34:16,199 INFO L231 Difference]: Finished difference. Result has 272 places, 466 transitions, 9171 flow [2023-08-24 09:34:16,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=7000, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=9171, PETRI_PLACES=272, PETRI_TRANSITIONS=466} [2023-08-24 09:34:16,199 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2023-08-24 09:34:16,199 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 466 transitions, 9171 flow [2023-08-24 09:34:16,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.95454545454545) internal successors, (1253), 22 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:16,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:16,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:16,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-24 09:34:16,404 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 09:34:16,404 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 09:34:16,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:16,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2116784882, now seen corresponding path program 15 times [2023-08-24 09:34:16,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:16,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905612373] [2023-08-24 09:34:16,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:16,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:16,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:16,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905612373] [2023-08-24 09:34:16,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905612373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:16,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397183734] [2023-08-24 09:34:16,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:34:16,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:16,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:16,565 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 09:34:16,567 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 09:34:16,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 09:34:16,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:16,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 09:34:16,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:16,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:17,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:17,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397183734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:17,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:17,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 20 [2023-08-24 09:34:17,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952174246] [2023-08-24 09:34:17,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:17,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:34:17,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:34:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:34:17,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:17,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 466 transitions, 9171 flow. Second operand has 21 states, 21 states have (on average 54.904761904761905) internal successors, (1153), 21 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 09:34:17,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:17,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:17,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:18,411 INFO L124 PetriNetUnfolderBase]: 1268/2250 cut-off events. [2023-08-24 09:34:18,411 INFO L125 PetriNetUnfolderBase]: For 66706/66706 co-relation queries the response was YES. [2023-08-24 09:34:18,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22862 conditions, 2250 events. 1268/2250 cut-off events. For 66706/66706 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 13243 event pairs, 17 based on Foata normal form. 11/2261 useless extension candidates. Maximal degree in co-relation 22517. Up to 1527 conditions per place. [2023-08-24 09:34:18,431 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 349 selfloop transitions, 192 changer transitions 7/548 dead transitions. [2023-08-24 09:34:18,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 548 transitions, 11731 flow [2023-08-24 09:34:18,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 09:34:18,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 09:34:18,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1319 transitions. [2023-08-24 09:34:18,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3982487922705314 [2023-08-24 09:34:18,449 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1319 transitions. [2023-08-24 09:34:18,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1319 transitions. [2023-08-24 09:34:18,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:18,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1319 transitions. [2023-08-24 09:34:18,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 57.34782608695652) internal successors, (1319), 23 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:18,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:18,454 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 144.0) internal successors, (3456), 24 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:18,454 INFO L175 Difference]: Start difference. First operand has 272 places, 466 transitions, 9171 flow. Second operand 23 states and 1319 transitions. [2023-08-24 09:34:18,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 548 transitions, 11731 flow [2023-08-24 09:34:18,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 548 transitions, 11385 flow, removed 131 selfloop flow, removed 14 redundant places. [2023-08-24 09:34:18,877 INFO L231 Difference]: Finished difference. Result has 286 places, 495 transitions, 10287 flow [2023-08-24 09:34:18,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=8782, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=10287, PETRI_PLACES=286, PETRI_TRANSITIONS=495} [2023-08-24 09:34:18,877 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 266 predicate places. [2023-08-24 09:34:18,878 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 495 transitions, 10287 flow [2023-08-24 09:34:18,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.904761904761905) internal successors, (1153), 21 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 09:34:18,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:18,878 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:18,882 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 09:34:19,082 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 09:34:19,082 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 09:34:19,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:19,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1273525428, now seen corresponding path program 16 times [2023-08-24 09:34:19,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:19,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072211389] [2023-08-24 09:34:19,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:19,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:19,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:19,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072211389] [2023-08-24 09:34:19,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072211389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:19,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336956507] [2023-08-24 09:34:19,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:34:19,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:19,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:19,240 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 09:34:19,242 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 09:34:19,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:34:19,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:19,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:34:19,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:19,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:19,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336956507] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:19,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:19,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-24 09:34:19,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578952574] [2023-08-24 09:34:19,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:19,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:34:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:19,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:34:19,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:34:19,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:34:19,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 495 transitions, 10287 flow. Second operand has 18 states, 18 states have (on average 57.111111111111114) internal successors, (1028), 18 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:19,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:19,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:34:19,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:20,610 INFO L124 PetriNetUnfolderBase]: 1346/2377 cut-off events. [2023-08-24 09:34:20,610 INFO L125 PetriNetUnfolderBase]: For 91931/91931 co-relation queries the response was YES. [2023-08-24 09:34:20,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25472 conditions, 2377 events. 1346/2377 cut-off events. For 91931/91931 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 14038 event pairs, 29 based on Foata normal form. 36/2413 useless extension candidates. Maximal degree in co-relation 25318. Up to 1557 conditions per place. [2023-08-24 09:34:20,629 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 348 selfloop transitions, 238 changer transitions 1/587 dead transitions. [2023-08-24 09:34:20,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 587 transitions, 13235 flow [2023-08-24 09:34:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:34:20,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:34:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1609 transitions. [2023-08-24 09:34:20,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4138374485596708 [2023-08-24 09:34:20,632 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1609 transitions. [2023-08-24 09:34:20,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1609 transitions. [2023-08-24 09:34:20,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:20,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1609 transitions. [2023-08-24 09:34:20,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 59.592592592592595) internal successors, (1609), 27 states have internal predecessors, (1609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:20,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:20,637 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:20,637 INFO L175 Difference]: Start difference. First operand has 286 places, 495 transitions, 10287 flow. Second operand 27 states and 1609 transitions. [2023-08-24 09:34:20,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 587 transitions, 13235 flow [2023-08-24 09:34:21,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 587 transitions, 12334 flow, removed 409 selfloop flow, removed 11 redundant places. [2023-08-24 09:34:21,095 INFO L231 Difference]: Finished difference. Result has 302 places, 520 transitions, 11145 flow [2023-08-24 09:34:21,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=9615, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11145, PETRI_PLACES=302, PETRI_TRANSITIONS=520} [2023-08-24 09:34:21,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 282 predicate places. [2023-08-24 09:34:21,096 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 520 transitions, 11145 flow [2023-08-24 09:34:21,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.111111111111114) internal successors, (1028), 18 states have internal predecessors, (1028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:21,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:21,096 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:21,100 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 09:34:21,300 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 09:34:21,301 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:34:21,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:21,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1015205721, now seen corresponding path program 17 times [2023-08-24 09:34:21,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:21,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982995389] [2023-08-24 09:34:21,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:21,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:21,528 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 09:34:21,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:21,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982995389] [2023-08-24 09:34:21,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982995389] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:21,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938401742] [2023-08-24 09:34:21,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:34:21,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:21,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:21,533 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 09:34:21,535 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 09:34:21,596 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:34:21,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:21,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:34:21,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:21,762 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 09:34:21,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:21,976 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 09:34:21,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938401742] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:21,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:21,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 09:34:21,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415469632] [2023-08-24 09:34:21,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:21,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:34:21,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:21,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:34:21,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:34:21,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:21,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 520 transitions, 11145 flow. Second operand has 20 states, 20 states have (on average 55.1) internal successors, (1102), 20 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:21,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:21,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:21,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:23,917 INFO L124 PetriNetUnfolderBase]: 2178/3616 cut-off events. [2023-08-24 09:34:23,917 INFO L125 PetriNetUnfolderBase]: For 126604/126604 co-relation queries the response was YES. [2023-08-24 09:34:23,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40925 conditions, 3616 events. 2178/3616 cut-off events. For 126604/126604 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 21312 event pairs, 34 based on Foata normal form. 25/3641 useless extension candidates. Maximal degree in co-relation 40069. Up to 1369 conditions per place. [2023-08-24 09:34:23,952 INFO L140 encePairwiseOnDemand]: 135/144 looper letters, 494 selfloop transitions, 460 changer transitions 33/987 dead transitions. [2023-08-24 09:34:23,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 987 transitions, 22735 flow [2023-08-24 09:34:23,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 09:34:23,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 09:34:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2360 transitions. [2023-08-24 09:34:23,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997289972899729 [2023-08-24 09:34:23,954 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2360 transitions. [2023-08-24 09:34:23,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2360 transitions. [2023-08-24 09:34:23,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:23,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2360 transitions. [2023-08-24 09:34:23,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.5609756097561) internal successors, (2360), 41 states have internal predecessors, (2360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:23,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 144.0) internal successors, (6048), 42 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 09:34:23,964 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 144.0) internal successors, (6048), 42 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 09:34:23,964 INFO L175 Difference]: Start difference. First operand has 302 places, 520 transitions, 11145 flow. Second operand 41 states and 2360 transitions. [2023-08-24 09:34:23,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 987 transitions, 22735 flow [2023-08-24 09:34:24,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 987 transitions, 21813 flow, removed 333 selfloop flow, removed 19 redundant places. [2023-08-24 09:34:24,712 INFO L231 Difference]: Finished difference. Result has 340 places, 779 transitions, 17808 flow [2023-08-24 09:34:24,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=17808, PETRI_PLACES=340, PETRI_TRANSITIONS=779} [2023-08-24 09:34:24,713 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-08-24 09:34:24,713 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 779 transitions, 17808 flow [2023-08-24 09:34:24,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.1) internal successors, (1102), 20 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:24,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:24,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:24,721 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 09:34:24,918 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 09:34:24,918 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 09:34:24,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:24,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1342205231, now seen corresponding path program 18 times [2023-08-24 09:34:24,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:24,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421876707] [2023-08-24 09:34:24,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:24,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:25,195 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 09:34:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:25,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421876707] [2023-08-24 09:34:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421876707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:25,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597222215] [2023-08-24 09:34:25,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:34:25,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:25,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:25,196 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 09:34:25,199 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 09:34:25,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 09:34:25,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:25,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:34:25,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:25,429 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 09:34:25,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:25,636 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 09:34:25,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597222215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:25,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:25,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 09:34:25,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308520130] [2023-08-24 09:34:25,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:34:25,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:25,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:34:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2023-08-24 09:34:25,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:25,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 779 transitions, 17808 flow. Second operand has 24 states, 24 states have (on average 54.875) internal successors, (1317), 24 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:25,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:25,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:25,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:29,013 INFO L124 PetriNetUnfolderBase]: 2482/4141 cut-off events. [2023-08-24 09:34:29,014 INFO L125 PetriNetUnfolderBase]: For 180689/180689 co-relation queries the response was YES. [2023-08-24 09:34:29,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49637 conditions, 4141 events. 2482/4141 cut-off events. For 180689/180689 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 25171 event pairs, 26 based on Foata normal form. 64/4205 useless extension candidates. Maximal degree in co-relation 49431. Up to 1261 conditions per place. [2023-08-24 09:34:29,090 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 339 selfloop transitions, 781 changer transitions 4/1124 dead transitions. [2023-08-24 09:34:29,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1124 transitions, 27208 flow [2023-08-24 09:34:29,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-24 09:34:29,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-24 09:34:29,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 3609 transitions. [2023-08-24 09:34:29,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978174603174603 [2023-08-24 09:34:29,100 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 3609 transitions. [2023-08-24 09:34:29,100 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 3609 transitions. [2023-08-24 09:34:29,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:29,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 3609 transitions. [2023-08-24 09:34:29,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 57.285714285714285) internal successors, (3609), 63 states have internal predecessors, (3609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:29,128 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 144.0) internal successors, (9216), 64 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:29,129 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 144.0) internal successors, (9216), 64 states have internal predecessors, (9216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:29,129 INFO L175 Difference]: Start difference. First operand has 340 places, 779 transitions, 17808 flow. Second operand 63 states and 3609 transitions. [2023-08-24 09:34:29,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1124 transitions, 27208 flow [2023-08-24 09:34:30,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 1124 transitions, 25962 flow, removed 457 selfloop flow, removed 14 redundant places. [2023-08-24 09:34:30,261 INFO L231 Difference]: Finished difference. Result has 401 places, 949 transitions, 23717 flow [2023-08-24 09:34:30,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=16656, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=619, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=23717, PETRI_PLACES=401, PETRI_TRANSITIONS=949} [2023-08-24 09:34:30,262 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 381 predicate places. [2023-08-24 09:34:30,278 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 949 transitions, 23717 flow [2023-08-24 09:34:30,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 54.875) internal successors, (1317), 24 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:30,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:30,278 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:30,297 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 09:34:30,479 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 09:34:30,479 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:34:30,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:30,479 INFO L85 PathProgramCache]: Analyzing trace with hash 498945777, now seen corresponding path program 19 times [2023-08-24 09:34:30,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:30,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249439084] [2023-08-24 09:34:30,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:30,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:30,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:30,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249439084] [2023-08-24 09:34:30,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249439084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:30,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287833928] [2023-08-24 09:34:30,659 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:34:30,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:30,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:30,659 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:34:30,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 09:34:30,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:30,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:34:30,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:30,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:34:31,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287833928] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:31,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:31,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-08-24 09:34:31,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403381935] [2023-08-24 09:34:31,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:31,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 09:34:31,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 09:34:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-08-24 09:34:31,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:31,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 949 transitions, 23717 flow. Second operand has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:31,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:31,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:31,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:33,952 INFO L124 PetriNetUnfolderBase]: 2839/4656 cut-off events. [2023-08-24 09:34:33,952 INFO L125 PetriNetUnfolderBase]: For 214209/214209 co-relation queries the response was YES. [2023-08-24 09:34:33,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60594 conditions, 4656 events. 2839/4656 cut-off events. For 214209/214209 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 28347 event pairs, 188 based on Foata normal form. 54/4710 useless extension candidates. Maximal degree in co-relation 59968. Up to 1907 conditions per place. [2023-08-24 09:34:34,014 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 436 selfloop transitions, 797 changer transitions 10/1243 dead transitions. [2023-08-24 09:34:34,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 1243 transitions, 33998 flow [2023-08-24 09:34:34,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 09:34:34,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 09:34:34,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2346 transitions. [2023-08-24 09:34:34,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39735772357723576 [2023-08-24 09:34:34,017 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2346 transitions. [2023-08-24 09:34:34,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2346 transitions. [2023-08-24 09:34:34,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:34,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2346 transitions. [2023-08-24 09:34:34,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.21951219512195) internal successors, (2346), 41 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:34,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 144.0) internal successors, (6048), 42 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 09:34:34,023 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 144.0) internal successors, (6048), 42 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 09:34:34,023 INFO L175 Difference]: Start difference. First operand has 401 places, 949 transitions, 23717 flow. Second operand 41 states and 2346 transitions. [2023-08-24 09:34:34,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 1243 transitions, 33998 flow [2023-08-24 09:34:35,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1243 transitions, 32155 flow, removed 796 selfloop flow, removed 30 redundant places. [2023-08-24 09:34:35,748 INFO L231 Difference]: Finished difference. Result has 421 places, 1129 transitions, 30375 flow [2023-08-24 09:34:35,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=22304, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=949, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=642, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=30375, PETRI_PLACES=421, PETRI_TRANSITIONS=1129} [2023-08-24 09:34:35,749 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 401 predicate places. [2023-08-24 09:34:35,749 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1129 transitions, 30375 flow [2023-08-24 09:34:35,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 54.6) internal successors, (1092), 20 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:35,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:35,750 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:35,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-24 09:34:35,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:35,954 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:34:35,954 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2136223557, now seen corresponding path program 20 times [2023-08-24 09:34:35,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:35,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907514828] [2023-08-24 09:34:35,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:35,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:35,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:36,273 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 09:34:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907514828] [2023-08-24 09:34:36,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907514828] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085165246] [2023-08-24 09:34:36,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:34:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:36,275 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:34:36,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 09:34:36,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:34:36,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:36,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:34:36,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:36,515 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 09:34:36,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:36,687 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 09:34:36,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085165246] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:36,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:36,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-24 09:34:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620944329] [2023-08-24 09:34:36,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:34:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:34:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:34:36,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:36,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1129 transitions, 30375 flow. Second operand has 21 states, 21 states have (on average 55.04761904761905) internal successors, (1156), 21 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:36,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:36,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:36,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:39,646 INFO L124 PetriNetUnfolderBase]: 2931/4819 cut-off events. [2023-08-24 09:34:39,647 INFO L125 PetriNetUnfolderBase]: For 226943/226943 co-relation queries the response was YES. [2023-08-24 09:34:39,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63322 conditions, 4819 events. 2931/4819 cut-off events. For 226943/226943 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 29588 event pairs, 43 based on Foata normal form. 17/4836 useless extension candidates. Maximal degree in co-relation 62770. Up to 1767 conditions per place. [2023-08-24 09:34:39,710 INFO L140 encePairwiseOnDemand]: 135/144 looper letters, 673 selfloop transitions, 620 changer transitions 16/1309 dead transitions. [2023-08-24 09:34:39,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 1309 transitions, 35965 flow [2023-08-24 09:34:39,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 09:34:39,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 09:34:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2424 transitions. [2023-08-24 09:34:39,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2023-08-24 09:34:39,713 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2424 transitions. [2023-08-24 09:34:39,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2424 transitions. [2023-08-24 09:34:39,713 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:39,713 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2424 transitions. [2023-08-24 09:34:39,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 57.714285714285715) internal successors, (2424), 42 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:39,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 144.0) internal successors, (6192), 43 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:39,718 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 144.0) internal successors, (6192), 43 states have internal predecessors, (6192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:39,719 INFO L175 Difference]: Start difference. First operand has 421 places, 1129 transitions, 30375 flow. Second operand 42 states and 2424 transitions. [2023-08-24 09:34:39,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 1309 transitions, 35965 flow [2023-08-24 09:34:41,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1309 transitions, 32834 flow, removed 1366 selfloop flow, removed 11 redundant places. [2023-08-24 09:34:41,971 INFO L231 Difference]: Finished difference. Result has 461 places, 1168 transitions, 29949 flow [2023-08-24 09:34:41,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=27649, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=582, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=29949, PETRI_PLACES=461, PETRI_TRANSITIONS=1168} [2023-08-24 09:34:41,972 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 441 predicate places. [2023-08-24 09:34:41,972 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 1168 transitions, 29949 flow [2023-08-24 09:34:41,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 55.04761904761905) internal successors, (1156), 21 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:41,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:41,973 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:41,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 09:34:42,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-24 09:34:42,177 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:34:42,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:42,177 INFO L85 PathProgramCache]: Analyzing trace with hash -342869711, now seen corresponding path program 21 times [2023-08-24 09:34:42,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:42,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516478290] [2023-08-24 09:34:42,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:42,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:42,373 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 09:34:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516478290] [2023-08-24 09:34:42,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516478290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:42,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32583918] [2023-08-24 09:34:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:34:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:42,374 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:34:42,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 09:34:42,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:34:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:42,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:34:42,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:42,598 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 09:34:42,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:42,897 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 09:34:42,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32583918] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:42,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:42,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-24 09:34:42,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097301819] [2023-08-24 09:34:42,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:42,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:34:42,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:42,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:34:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:34:42,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:42,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 1168 transitions, 29949 flow. Second operand has 22 states, 22 states have (on average 54.81818181818182) internal successors, (1206), 22 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:42,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:42,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:42,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:46,419 INFO L124 PetriNetUnfolderBase]: 3019/4992 cut-off events. [2023-08-24 09:34:46,419 INFO L125 PetriNetUnfolderBase]: For 171567/171567 co-relation queries the response was YES. [2023-08-24 09:34:46,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61821 conditions, 4992 events. 3019/4992 cut-off events. For 171567/171567 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 31088 event pairs, 29 based on Foata normal form. 30/5022 useless extension candidates. Maximal degree in co-relation 61246. Up to 1858 conditions per place. [2023-08-24 09:34:46,482 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 695 selfloop transitions, 611 changer transitions 7/1313 dead transitions. [2023-08-24 09:34:46,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1313 transitions, 34679 flow [2023-08-24 09:34:46,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 09:34:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 09:34:46,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2586 transitions. [2023-08-24 09:34:46,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3990740740740741 [2023-08-24 09:34:46,485 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2586 transitions. [2023-08-24 09:34:46,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2586 transitions. [2023-08-24 09:34:46,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:46,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2586 transitions. [2023-08-24 09:34:46,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.46666666666667) internal successors, (2586), 45 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:46,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:46,490 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 144.0) internal successors, (6624), 46 states have internal predecessors, (6624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:46,490 INFO L175 Difference]: Start difference. First operand has 461 places, 1168 transitions, 29949 flow. Second operand 45 states and 2586 transitions. [2023-08-24 09:34:46,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1313 transitions, 34679 flow [2023-08-24 09:34:48,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 1313 transitions, 33788 flow, removed 321 selfloop flow, removed 18 redundant places. [2023-08-24 09:34:48,139 INFO L231 Difference]: Finished difference. Result has 490 places, 1194 transitions, 31480 flow [2023-08-24 09:34:48,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=29138, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=575, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=31480, PETRI_PLACES=490, PETRI_TRANSITIONS=1194} [2023-08-24 09:34:48,140 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 470 predicate places. [2023-08-24 09:34:48,140 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 1194 transitions, 31480 flow [2023-08-24 09:34:48,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.81818181818182) internal successors, (1206), 22 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:48,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:48,140 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:48,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 09:34:48,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-24 09:34:48,345 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:34:48,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:48,345 INFO L85 PathProgramCache]: Analyzing trace with hash 691012783, now seen corresponding path program 22 times [2023-08-24 09:34:48,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:48,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112504997] [2023-08-24 09:34:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:48,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:48,617 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 09:34:48,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:48,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112504997] [2023-08-24 09:34:48,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112504997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:48,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526522866] [2023-08-24 09:34:48,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:34:48,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:48,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:48,630 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:34:48,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 09:34:48,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:34:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:48,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:34:48,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:48,859 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 09:34:48,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:49,042 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 09:34:49,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526522866] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:49,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:49,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-24 09:34:49,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195573782] [2023-08-24 09:34:49,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:49,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:34:49,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:49,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:34:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:34:49,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:34:49,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 1194 transitions, 31480 flow. Second operand has 22 states, 22 states have (on average 54.77272727272727) internal successors, (1205), 22 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:49,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:49,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:34:49,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:34:52,622 INFO L124 PetriNetUnfolderBase]: 3537/5806 cut-off events. [2023-08-24 09:34:52,623 INFO L125 PetriNetUnfolderBase]: For 231860/231860 co-relation queries the response was YES. [2023-08-24 09:34:52,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74742 conditions, 5806 events. 3537/5806 cut-off events. For 231860/231860 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 36820 event pairs, 166 based on Foata normal form. 56/5862 useless extension candidates. Maximal degree in co-relation 74191. Up to 1949 conditions per place. [2023-08-24 09:34:52,689 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 553 selfloop transitions, 962 changer transitions 15/1530 dead transitions. [2023-08-24 09:34:52,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 1530 transitions, 42987 flow [2023-08-24 09:34:52,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 09:34:52,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 09:34:52,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2651 transitions. [2023-08-24 09:34:52,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4002113526570048 [2023-08-24 09:34:52,691 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2651 transitions. [2023-08-24 09:34:52,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2651 transitions. [2023-08-24 09:34:52,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:34:52,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2651 transitions. [2023-08-24 09:34:52,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 57.630434782608695) internal successors, (2651), 46 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:52,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 144.0) internal successors, (6768), 47 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:52,697 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 144.0) internal successors, (6768), 47 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:52,697 INFO L175 Difference]: Start difference. First operand has 490 places, 1194 transitions, 31480 flow. Second operand 46 states and 2651 transitions. [2023-08-24 09:34:52,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 1530 transitions, 42987 flow [2023-08-24 09:34:54,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 1530 transitions, 42555 flow, removed 86 selfloop flow, removed 25 redundant places. [2023-08-24 09:34:54,843 INFO L231 Difference]: Finished difference. Result has 525 places, 1390 transitions, 40334 flow [2023-08-24 09:34:54,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=31030, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=781, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=40334, PETRI_PLACES=525, PETRI_TRANSITIONS=1390} [2023-08-24 09:34:54,844 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 505 predicate places. [2023-08-24 09:34:54,844 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 1390 transitions, 40334 flow [2023-08-24 09:34:54,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.77272727272727) internal successors, (1205), 22 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:54,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:34:54,845 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:34:54,852 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-24 09:34:55,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:55,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:34:55,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:34:55,049 INFO L85 PathProgramCache]: Analyzing trace with hash 504940431, now seen corresponding path program 23 times [2023-08-24 09:34:55,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:34:55,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251363715] [2023-08-24 09:34:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:34:55,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:34:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:34:55,299 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 09:34:55,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:34:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251363715] [2023-08-24 09:34:55,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251363715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:34:55,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184730689] [2023-08-24 09:34:55,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:34:55,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:34:55,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:34:55,300 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:34:55,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 09:34:55,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:34:55,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:34:55,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:34:55,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:34:55,564 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 09:34:55,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:34:55,903 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 09:34:55,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184730689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:34:55,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:34:55,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:34:55,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469271292] [2023-08-24 09:34:55,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:34:55,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:34:55,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:34:55,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:34:55,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:34:55,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:34:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 1390 transitions, 40334 flow. Second operand has 23 states, 23 states have (on average 56.869565217391305) internal successors, (1308), 23 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:34:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:34:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:34:55,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:35:01,120 INFO L124 PetriNetUnfolderBase]: 3834/6349 cut-off events. [2023-08-24 09:35:01,120 INFO L125 PetriNetUnfolderBase]: For 270298/270298 co-relation queries the response was YES. [2023-08-24 09:35:01,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86669 conditions, 6349 events. 3834/6349 cut-off events. For 270298/270298 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 41345 event pairs, 40 based on Foata normal form. 34/6383 useless extension candidates. Maximal degree in co-relation 86110. Up to 2035 conditions per place. [2023-08-24 09:35:01,203 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 568 selfloop transitions, 1009 changer transitions 39/1616 dead transitions. [2023-08-24 09:35:01,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1616 transitions, 48757 flow [2023-08-24 09:35:01,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:35:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:35:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2372 transitions. [2023-08-24 09:35:01,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41180555555555554 [2023-08-24 09:35:01,205 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2372 transitions. [2023-08-24 09:35:01,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2372 transitions. [2023-08-24 09:35:01,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:35:01,206 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2372 transitions. [2023-08-24 09:35:01,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 59.3) internal successors, (2372), 40 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:01,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:01,211 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:01,211 INFO L175 Difference]: Start difference. First operand has 525 places, 1390 transitions, 40334 flow. Second operand 40 states and 2372 transitions. [2023-08-24 09:35:01,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1616 transitions, 48757 flow [2023-08-24 09:35:04,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1616 transitions, 46482 flow, removed 769 selfloop flow, removed 19 redundant places. [2023-08-24 09:35:04,679 INFO L231 Difference]: Finished difference. Result has 556 places, 1497 transitions, 44753 flow [2023-08-24 09:35:04,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=38179, PETRI_DIFFERENCE_MINUEND_PLACES=505, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=888, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=44753, PETRI_PLACES=556, PETRI_TRANSITIONS=1497} [2023-08-24 09:35:04,680 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 536 predicate places. [2023-08-24 09:35:04,680 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 1497 transitions, 44753 flow [2023-08-24 09:35:04,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.869565217391305) internal successors, (1308), 23 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:04,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:35:04,681 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:35:04,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 09:35:04,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:35:04,885 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:35:04,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:35:04,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1985511335, now seen corresponding path program 24 times [2023-08-24 09:35:04,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:35:04,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434209694] [2023-08-24 09:35:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:35:04,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:35:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:35:05,152 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 09:35:05,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:35:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434209694] [2023-08-24 09:35:05,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434209694] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:35:05,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659134256] [2023-08-24 09:35:05,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:35:05,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:35:05,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:35:05,154 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:35:05,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 09:35:05,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 09:35:05,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:35:05,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:35:05,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:35:05,344 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 09:35:05,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:35:05,608 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 09:35:05,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659134256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:35:05,609 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:35:05,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:35:05,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583157937] [2023-08-24 09:35:05,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:35:05,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:35:05,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:35:05,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:35:05,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:35:05,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:35:05,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 1497 transitions, 44753 flow. Second operand has 23 states, 23 states have (on average 56.78260869565217) internal successors, (1306), 23 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:05,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:35:05,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:35:05,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:35:10,063 INFO L124 PetriNetUnfolderBase]: 3851/6370 cut-off events. [2023-08-24 09:35:10,063 INFO L125 PetriNetUnfolderBase]: For 281983/281983 co-relation queries the response was YES. [2023-08-24 09:35:10,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88369 conditions, 6370 events. 3851/6370 cut-off events. For 281983/281983 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 41246 event pairs, 48 based on Foata normal form. 44/6414 useless extension candidates. Maximal degree in co-relation 87773. Up to 2997 conditions per place. [2023-08-24 09:35:10,153 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 982 selfloop transitions, 634 changer transitions 12/1628 dead transitions. [2023-08-24 09:35:10,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1628 transitions, 50363 flow [2023-08-24 09:35:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 09:35:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 09:35:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2204 transitions. [2023-08-24 09:35:10,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41366366366366364 [2023-08-24 09:35:10,156 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2204 transitions. [2023-08-24 09:35:10,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2204 transitions. [2023-08-24 09:35:10,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:35:10,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2204 transitions. [2023-08-24 09:35:10,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 59.567567567567565) internal successors, (2204), 37 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:10,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 144.0) internal successors, (5472), 38 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:10,160 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 144.0) internal successors, (5472), 38 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:10,161 INFO L175 Difference]: Start difference. First operand has 556 places, 1497 transitions, 44753 flow. Second operand 37 states and 2204 transitions. [2023-08-24 09:35:10,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1628 transitions, 50363 flow [2023-08-24 09:35:14,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1628 transitions, 49110 flow, removed 556 selfloop flow, removed 20 redundant places. [2023-08-24 09:35:14,222 INFO L231 Difference]: Finished difference. Result has 576 places, 1527 transitions, 46114 flow [2023-08-24 09:35:14,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=43444, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=591, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=46114, PETRI_PLACES=576, PETRI_TRANSITIONS=1527} [2023-08-24 09:35:14,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 556 predicate places. [2023-08-24 09:35:14,223 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 1527 transitions, 46114 flow [2023-08-24 09:35:14,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.78260869565217) internal successors, (1306), 23 states have internal predecessors, (1306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:14,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:35:14,224 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:35:14,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 09:35:14,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 09:35:14,428 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:35:14,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:35:14,428 INFO L85 PathProgramCache]: Analyzing trace with hash -152246671, now seen corresponding path program 25 times [2023-08-24 09:35:14,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:35:14,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514530268] [2023-08-24 09:35:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:35:14,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:35:14,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:35:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:14,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:35:14,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514530268] [2023-08-24 09:35:14,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514530268] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:35:14,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223691610] [2023-08-24 09:35:14,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:35:14,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:35:14,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:35:14,704 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:35:14,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 09:35:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:35:14,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:35:14,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:35:14,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:14,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:35:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:35:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223691610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:35:15,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:35:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:35:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043186242] [2023-08-24 09:35:15,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:35:15,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:35:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:35:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:35:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:35:15,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:35:15,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 1527 transitions, 46114 flow. Second operand has 23 states, 23 states have (on average 54.65217391304348) internal successors, (1257), 23 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:35:15,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:35:15,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:35:15,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:35:20,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:35:37,649 WARN L234 SmtUtils]: Spent 14.45s on a formula simplification. DAG size of input: 74 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:35:39,897 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 09:35:43,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:35:45,221 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:35:47,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:35:57,946 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:36:17,281 INFO L124 PetriNetUnfolderBase]: 4152/6763 cut-off events. [2023-08-24 09:36:17,281 INFO L125 PetriNetUnfolderBase]: For 308453/308453 co-relation queries the response was YES. [2023-08-24 09:36:17,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96467 conditions, 6763 events. 4152/6763 cut-off events. For 308453/308453 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 43165 event pairs, 76 based on Foata normal form. 58/6821 useless extension candidates. Maximal degree in co-relation 95854. Up to 4997 conditions per place. [2023-08-24 09:36:17,369 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 1048 selfloop transitions, 734 changer transitions 30/1812 dead transitions. [2023-08-24 09:36:17,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1812 transitions, 57636 flow [2023-08-24 09:36:17,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 09:36:17,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 09:36:17,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2853 transitions. [2023-08-24 09:36:17,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39625 [2023-08-24 09:36:17,372 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2853 transitions. [2023-08-24 09:36:17,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2853 transitions. [2023-08-24 09:36:17,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:36:17,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2853 transitions. [2023-08-24 09:36:17,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.06) internal successors, (2853), 50 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:17,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 144.0) internal successors, (7344), 51 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:17,378 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 144.0) internal successors, (7344), 51 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:17,378 INFO L175 Difference]: Start difference. First operand has 576 places, 1527 transitions, 46114 flow. Second operand 50 states and 2853 transitions. [2023-08-24 09:36:17,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1812 transitions, 57636 flow [2023-08-24 09:36:21,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 1812 transitions, 56613 flow, removed 364 selfloop flow, removed 17 redundant places. [2023-08-24 09:36:21,204 INFO L231 Difference]: Finished difference. Result has 625 places, 1672 transitions, 53158 flow [2023-08-24 09:36:21,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=44902, PETRI_DIFFERENCE_MINUEND_PLACES=559, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=593, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=53158, PETRI_PLACES=625, PETRI_TRANSITIONS=1672} [2023-08-24 09:36:21,205 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 605 predicate places. [2023-08-24 09:36:21,205 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 1672 transitions, 53158 flow [2023-08-24 09:36:21,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.65217391304348) internal successors, (1257), 23 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:21,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:36:21,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:36:21,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-24 09:36:21,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 09:36:21,409 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:36:21,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:36:21,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1580955289, now seen corresponding path program 26 times [2023-08-24 09:36:21,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:36:21,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046783027] [2023-08-24 09:36:21,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:36:21,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:36:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:36:21,650 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 09:36:21,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:36:21,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046783027] [2023-08-24 09:36:21,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046783027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:36:21,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950080579] [2023-08-24 09:36:21,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:36:21,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:36:21,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:36:21,652 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:36:21,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 09:36:21,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:36:21,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:36:21,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:36:21,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:36:21,897 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 09:36:21,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:36:22,129 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 09:36:22,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950080579] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:36:22,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:36:22,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-08-24 09:36:22,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823625325] [2023-08-24 09:36:22,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:36:22,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:36:22,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:36:22,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:36:22,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:36:22,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:36:22,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 1672 transitions, 53158 flow. Second operand has 22 states, 22 states have (on average 54.77272727272727) internal successors, (1205), 22 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:22,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:36:22,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:36:22,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:36:27,151 INFO L124 PetriNetUnfolderBase]: 4352/7148 cut-off events. [2023-08-24 09:36:27,151 INFO L125 PetriNetUnfolderBase]: For 334438/334438 co-relation queries the response was YES. [2023-08-24 09:36:27,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102996 conditions, 7148 events. 4352/7148 cut-off events. For 334438/334438 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 46646 event pairs, 69 based on Foata normal form. 17/7165 useless extension candidates. Maximal degree in co-relation 102489. Up to 5677 conditions per place. [2023-08-24 09:36:27,252 INFO L140 encePairwiseOnDemand]: 135/144 looper letters, 1460 selfloop transitions, 410 changer transitions 11/1881 dead transitions. [2023-08-24 09:36:27,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 668 places, 1881 transitions, 60951 flow [2023-08-24 09:36:27,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 09:36:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 09:36:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2652 transitions. [2023-08-24 09:36:27,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003623188405797 [2023-08-24 09:36:27,254 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2652 transitions. [2023-08-24 09:36:27,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2652 transitions. [2023-08-24 09:36:27,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:36:27,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2652 transitions. [2023-08-24 09:36:27,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 57.65217391304348) internal successors, (2652), 46 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:27,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 144.0) internal successors, (6768), 47 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:27,272 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 144.0) internal successors, (6768), 47 states have internal predecessors, (6768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:27,272 INFO L175 Difference]: Start difference. First operand has 625 places, 1672 transitions, 53158 flow. Second operand 46 states and 2652 transitions. [2023-08-24 09:36:27,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 668 places, 1881 transitions, 60951 flow [2023-08-24 09:36:32,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 646 places, 1881 transitions, 59266 flow, removed 769 selfloop flow, removed 22 redundant places. [2023-08-24 09:36:32,595 INFO L231 Difference]: Finished difference. Result has 658 places, 1737 transitions, 54576 flow [2023-08-24 09:36:32,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=51511, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=54576, PETRI_PLACES=658, PETRI_TRANSITIONS=1737} [2023-08-24 09:36:32,597 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 638 predicate places. [2023-08-24 09:36:32,598 INFO L495 AbstractCegarLoop]: Abstraction has has 658 places, 1737 transitions, 54576 flow [2023-08-24 09:36:32,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 54.77272727272727) internal successors, (1205), 22 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:32,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:36:32,598 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:36:32,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 09:36:32,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 09:36:32,807 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:36:32,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:36:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash -2065509777, now seen corresponding path program 27 times [2023-08-24 09:36:32,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:36:32,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769370982] [2023-08-24 09:36:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:36:32,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:36:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:36:33,178 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 09:36:33,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:36:33,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769370982] [2023-08-24 09:36:33,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769370982] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:36:33,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138207458] [2023-08-24 09:36:33,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:36:33,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:36:33,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:36:33,194 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:36:33,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 09:36:33,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:36:33,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:36:33,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:36:33,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:36:33,467 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 09:36:33,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:36:33,716 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 09:36:33,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138207458] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:36:33,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:36:33,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 09:36:33,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676006112] [2023-08-24 09:36:33,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:36:33,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 09:36:33,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:36:33,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 09:36:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-08-24 09:36:33,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:36:33,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 658 places, 1737 transitions, 54576 flow. Second operand has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:33,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:36:33,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:36:33,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:36:39,715 INFO L124 PetriNetUnfolderBase]: 4686/7721 cut-off events. [2023-08-24 09:36:39,715 INFO L125 PetriNetUnfolderBase]: For 370990/370990 co-relation queries the response was YES. [2023-08-24 09:36:39,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111460 conditions, 7721 events. 4686/7721 cut-off events. For 370990/370990 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 51347 event pairs, 106 based on Foata normal form. 34/7755 useless extension candidates. Maximal degree in co-relation 110988. Up to 6571 conditions per place. [2023-08-24 09:36:39,881 INFO L140 encePairwiseOnDemand]: 135/144 looper letters, 1652 selfloop transitions, 345 changer transitions 37/2034 dead transitions. [2023-08-24 09:36:39,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 700 places, 2034 transitions, 66738 flow [2023-08-24 09:36:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-24 09:36:39,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-24 09:36:39,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 2487 transitions. [2023-08-24 09:36:39,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4016472868217054 [2023-08-24 09:36:39,884 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 2487 transitions. [2023-08-24 09:36:39,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 2487 transitions. [2023-08-24 09:36:39,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:36:39,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 2487 transitions. [2023-08-24 09:36:39,886 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 57.83720930232558) internal successors, (2487), 43 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:39,899 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 144.0) internal successors, (6336), 44 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:39,900 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 144.0) internal successors, (6336), 44 states have internal predecessors, (6336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:39,900 INFO L175 Difference]: Start difference. First operand has 658 places, 1737 transitions, 54576 flow. Second operand 43 states and 2487 transitions. [2023-08-24 09:36:39,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 700 places, 2034 transitions, 66738 flow [2023-08-24 09:36:46,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 676 places, 2034 transitions, 66258 flow, removed 144 selfloop flow, removed 24 redundant places. [2023-08-24 09:36:46,439 INFO L231 Difference]: Finished difference. Result has 695 places, 1864 transitions, 59962 flow [2023-08-24 09:36:46,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=54145, PETRI_DIFFERENCE_MINUEND_PLACES=634, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1737, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=59962, PETRI_PLACES=695, PETRI_TRANSITIONS=1864} [2023-08-24 09:36:46,449 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 675 predicate places. [2023-08-24 09:36:46,449 INFO L495 AbstractCegarLoop]: Abstraction has has 695 places, 1864 transitions, 59962 flow [2023-08-24 09:36:46,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 54.88) internal successors, (1372), 25 states have internal predecessors, (1372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:46,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:36:46,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:36:46,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 09:36:46,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:36:46,655 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:36:46,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:36:46,656 INFO L85 PathProgramCache]: Analyzing trace with hash -697640743, now seen corresponding path program 28 times [2023-08-24 09:36:46,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:36:46,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623437010] [2023-08-24 09:36:46,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:36:46,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:36:46,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:36:46,922 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 09:36:46,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:36:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623437010] [2023-08-24 09:36:46,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623437010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:36:46,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654175378] [2023-08-24 09:36:46,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:36:46,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:36:46,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:36:46,933 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:36:46,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 09:36:46,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:36:46,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:36:46,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:36:46,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:36:47,329 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 09:36:47,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:36:47,701 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 09:36:47,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654175378] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:36:47,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:36:47,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2023-08-24 09:36:47,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917547629] [2023-08-24 09:36:47,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:36:47,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 09:36:47,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:36:47,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 09:36:47,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-08-24 09:36:47,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 144 [2023-08-24 09:36:47,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 695 places, 1864 transitions, 59962 flow. Second operand has 22 states, 22 states have (on average 56.77272727272727) internal successors, (1249), 22 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:47,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:36:47,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 144 [2023-08-24 09:36:47,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:36:56,093 INFO L124 PetriNetUnfolderBase]: 4991/8279 cut-off events. [2023-08-24 09:36:56,093 INFO L125 PetriNetUnfolderBase]: For 448847/448847 co-relation queries the response was YES. [2023-08-24 09:36:56,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121495 conditions, 8279 events. 4991/8279 cut-off events. For 448847/448847 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 55971 event pairs, 93 based on Foata normal form. 66/8345 useless extension candidates. Maximal degree in co-relation 121000. Up to 6487 conditions per place. [2023-08-24 09:36:56,228 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 1609 selfloop transitions, 500 changer transitions 22/2131 dead transitions. [2023-08-24 09:36:56,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 729 places, 2131 transitions, 72045 flow [2023-08-24 09:36:56,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-24 09:36:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-24 09:36:56,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2205 transitions. [2023-08-24 09:36:56,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41385135135135137 [2023-08-24 09:36:56,243 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2205 transitions. [2023-08-24 09:36:56,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2205 transitions. [2023-08-24 09:36:56,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:36:56,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2205 transitions. [2023-08-24 09:36:56,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 59.5945945945946) internal successors, (2205), 37 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:56,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 144.0) internal successors, (5472), 38 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:56,248 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 144.0) internal successors, (5472), 38 states have internal predecessors, (5472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:36:56,248 INFO L175 Difference]: Start difference. First operand has 695 places, 1864 transitions, 59962 flow. Second operand 37 states and 2205 transitions. [2023-08-24 09:36:56,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 729 places, 2131 transitions, 72045 flow [2023-08-24 09:37:03,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2131 transitions, 70109 flow, removed 869 selfloop flow, removed 18 redundant places. [2023-08-24 09:37:03,311 INFO L231 Difference]: Finished difference. Result has 725 places, 1972 transitions, 64060 flow [2023-08-24 09:37:03,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=57699, PETRI_DIFFERENCE_MINUEND_PLACES=675, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1848, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=392, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=64060, PETRI_PLACES=725, PETRI_TRANSITIONS=1972} [2023-08-24 09:37:03,312 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 705 predicate places. [2023-08-24 09:37:03,312 INFO L495 AbstractCegarLoop]: Abstraction has has 725 places, 1972 transitions, 64060 flow [2023-08-24 09:37:03,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.77272727272727) internal successors, (1249), 22 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:03,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:37:03,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:37:03,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 09:37:03,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:03,517 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:37:03,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:37:03,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1877081829, now seen corresponding path program 29 times [2023-08-24 09:37:03,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:37:03,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182194519] [2023-08-24 09:37:03,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:37:03,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:37:03,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:03,692 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 09:37:03,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:37:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182194519] [2023-08-24 09:37:03,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182194519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:37:03,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76887223] [2023-08-24 09:37:03,692 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:37:03,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:03,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:37:03,693 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:37:03,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 09:37:03,754 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 09:37:03,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:37:03,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 09:37:03,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:37:03,936 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 09:37:03,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:37:04,098 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 09:37:04,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76887223] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:37:04,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:37:04,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-24 09:37:04,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548100451] [2023-08-24 09:37:04,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:37:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:37:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:37:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:37:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:37:04,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:37:04,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 725 places, 1972 transitions, 64060 flow. Second operand has 21 states, 21 states have (on average 54.904761904761905) internal successors, (1153), 21 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 09:37:04,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:37:04,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:37:04,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:37:10,882 INFO L124 PetriNetUnfolderBase]: 5133/8525 cut-off events. [2023-08-24 09:37:10,882 INFO L125 PetriNetUnfolderBase]: For 489905/489905 co-relation queries the response was YES. [2023-08-24 09:37:10,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126226 conditions, 8525 events. 5133/8525 cut-off events. For 489905/489905 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 57997 event pairs, 111 based on Foata normal form. 48/8573 useless extension candidates. Maximal degree in co-relation 125728. Up to 7556 conditions per place. [2023-08-24 09:37:11,036 INFO L140 encePairwiseOnDemand]: 135/144 looper letters, 1882 selfloop transitions, 281 changer transitions 6/2169 dead transitions. [2023-08-24 09:37:11,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 764 places, 2169 transitions, 73368 flow [2023-08-24 09:37:11,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:37:11,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:37:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2315 transitions. [2023-08-24 09:37:11,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019097222222222 [2023-08-24 09:37:11,131 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2315 transitions. [2023-08-24 09:37:11,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2315 transitions. [2023-08-24 09:37:11,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:37:11,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2315 transitions. [2023-08-24 09:37:11,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.875) internal successors, (2315), 40 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:11,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:11,136 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:11,136 INFO L175 Difference]: Start difference. First operand has 725 places, 1972 transitions, 64060 flow. Second operand 40 states and 2315 transitions. [2023-08-24 09:37:11,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 764 places, 2169 transitions, 73368 flow [2023-08-24 09:37:19,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 2169 transitions, 72269 flow, removed 469 selfloop flow, removed 19 redundant places. [2023-08-24 09:37:19,311 INFO L231 Difference]: Finished difference. Result has 758 places, 2056 transitions, 66879 flow [2023-08-24 09:37:19,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=62774, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1966, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1745, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=66879, PETRI_PLACES=758, PETRI_TRANSITIONS=2056} [2023-08-24 09:37:19,312 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 738 predicate places. [2023-08-24 09:37:19,312 INFO L495 AbstractCegarLoop]: Abstraction has has 758 places, 2056 transitions, 66879 flow [2023-08-24 09:37:19,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.904761904761905) internal successors, (1153), 21 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 09:37:19,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:37:19,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:37:19,317 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 09:37:19,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:19,515 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:37:19,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:37:19,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1626507685, now seen corresponding path program 30 times [2023-08-24 09:37:19,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:37:19,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075738924] [2023-08-24 09:37:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:37:19,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:37:19,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:19,920 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 09:37:19,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:37:19,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075738924] [2023-08-24 09:37:19,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075738924] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:37:19,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063921888] [2023-08-24 09:37:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:37:19,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:37:19,922 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:37:19,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 09:37:19,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 09:37:19,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:37:19,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 09:37:19,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:37:20,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:37:20,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:37:20,496 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 09:37:20,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063921888] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:37:20,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:37:20,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2023-08-24 09:37:20,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390316886] [2023-08-24 09:37:20,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:37:20,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:37:20,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:37:20,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:37:20,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-08-24 09:37:20,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:37:20,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 758 places, 2056 transitions, 66879 flow. Second operand has 26 states, 26 states have (on average 54.80769230769231) internal successors, (1425), 26 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:20,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:37:20,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:37:20,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:37:30,061 INFO L124 PetriNetUnfolderBase]: 5537/9223 cut-off events. [2023-08-24 09:37:30,061 INFO L125 PetriNetUnfolderBase]: For 594627/594627 co-relation queries the response was YES. [2023-08-24 09:37:30,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140056 conditions, 9223 events. 5537/9223 cut-off events. For 594627/594627 co-relation queries the response was YES. Maximal size of possible extension queue 667. Compared 64033 event pairs, 109 based on Foata normal form. 40/9263 useless extension candidates. Maximal degree in co-relation 139554. Up to 7574 conditions per place. [2023-08-24 09:37:30,212 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 1706 selfloop transitions, 598 changer transitions 17/2321 dead transitions. [2023-08-24 09:37:30,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2321 transitions, 80701 flow [2023-08-24 09:37:30,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 09:37:30,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 09:37:30,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2362 transitions. [2023-08-24 09:37:30,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4000677506775068 [2023-08-24 09:37:30,214 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2362 transitions. [2023-08-24 09:37:30,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2362 transitions. [2023-08-24 09:37:30,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:37:30,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2362 transitions. [2023-08-24 09:37:30,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 57.609756097560975) internal successors, (2362), 41 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 09:37:30,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 144.0) internal successors, (6048), 42 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 09:37:30,219 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 144.0) internal successors, (6048), 42 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 09:37:30,219 INFO L175 Difference]: Start difference. First operand has 758 places, 2056 transitions, 66879 flow. Second operand 41 states and 2362 transitions. [2023-08-24 09:37:30,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2321 transitions, 80701 flow [2023-08-24 09:37:39,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 2321 transitions, 78069 flow, removed 1173 selfloop flow, removed 20 redundant places. [2023-08-24 09:37:39,421 INFO L231 Difference]: Finished difference. Result has 792 places, 2231 transitions, 74137 flow [2023-08-24 09:37:39,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=64777, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2052, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=74137, PETRI_PLACES=792, PETRI_TRANSITIONS=2231} [2023-08-24 09:37:39,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 772 predicate places. [2023-08-24 09:37:39,422 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 2231 transitions, 74137 flow [2023-08-24 09:37:39,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 54.80769230769231) internal successors, (1425), 26 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:39,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:37:39,422 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:37:39,445 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 09:37:39,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-24 09:37:39,629 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:37:39,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:37:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash 783248231, now seen corresponding path program 31 times [2023-08-24 09:37:39,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:37:39,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064536571] [2023-08-24 09:37:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:37:39,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:37:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:39,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:37:39,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:37:39,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064536571] [2023-08-24 09:37:39,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064536571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:37:39,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465298288] [2023-08-24 09:37:39,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 09:37:39,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:37:39,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:37:39,853 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:37:39,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 09:37:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:37:39,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-24 09:37:39,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:37:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:37:40,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:37:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:37:40,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465298288] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:37:40,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:37:40,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 09:37:40,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099820947] [2023-08-24 09:37:40,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:37:40,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 09:37:40,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:37:40,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 09:37:40,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-08-24 09:37:40,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:37:40,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 2231 transitions, 74137 flow. Second operand has 23 states, 23 states have (on average 54.65217391304348) internal successors, (1257), 23 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:40,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:37:40,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:37:40,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:37:48,992 INFO L124 PetriNetUnfolderBase]: 5648/9341 cut-off events. [2023-08-24 09:37:48,992 INFO L125 PetriNetUnfolderBase]: For 609044/609044 co-relation queries the response was YES. [2023-08-24 09:37:49,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144477 conditions, 9341 events. 5648/9341 cut-off events. For 609044/609044 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 64316 event pairs, 119 based on Foata normal form. 108/9449 useless extension candidates. Maximal degree in co-relation 143961. Up to 6926 conditions per place. [2023-08-24 09:37:49,164 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 1342 selfloop transitions, 1005 changer transitions 17/2364 dead transitions. [2023-08-24 09:37:49,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 818 places, 2364 transitions, 83585 flow [2023-08-24 09:37:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 09:37:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 09:37:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1541 transitions. [2023-08-24 09:37:49,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3963477366255144 [2023-08-24 09:37:49,166 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1541 transitions. [2023-08-24 09:37:49,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1541 transitions. [2023-08-24 09:37:49,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:37:49,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1541 transitions. [2023-08-24 09:37:49,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 57.074074074074076) internal successors, (1541), 27 states have internal predecessors, (1541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:49,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:49,169 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 144.0) internal successors, (4032), 28 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:37:49,169 INFO L175 Difference]: Start difference. First operand has 792 places, 2231 transitions, 74137 flow. Second operand 27 states and 1541 transitions. [2023-08-24 09:37:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 818 places, 2364 transitions, 83585 flow [2023-08-24 09:37:59,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 794 places, 2364 transitions, 78670 flow, removed 2283 selfloop flow, removed 24 redundant places. [2023-08-24 09:38:00,043 INFO L231 Difference]: Finished difference. Result has 800 places, 2277 transitions, 75713 flow [2023-08-24 09:38:00,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=69313, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=936, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=75713, PETRI_PLACES=800, PETRI_TRANSITIONS=2277} [2023-08-24 09:38:00,044 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 780 predicate places. [2023-08-24 09:38:00,044 INFO L495 AbstractCegarLoop]: Abstraction has has 800 places, 2277 transitions, 75713 flow [2023-08-24 09:38:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 54.65217391304348) internal successors, (1257), 23 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:00,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:00,045 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:00,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 09:38:00,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:00,250 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:38:00,250 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:00,250 INFO L85 PathProgramCache]: Analyzing trace with hash -58567257, now seen corresponding path program 32 times [2023-08-24 09:38:00,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:00,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592433401] [2023-08-24 09:38:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:00,440 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 09:38:00,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592433401] [2023-08-24 09:38:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592433401] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606714736] [2023-08-24 09:38:00,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 09:38:00,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:00,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:00,441 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:38:00,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 09:38:00,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 09:38:00,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:00,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:38:00,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:00,650 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 09:38:00,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:00,998 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 09:38:00,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606714736] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:00,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:00,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2023-08-24 09:38:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004829810] [2023-08-24 09:38:00,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:00,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 09:38:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 09:38:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-08-24 09:38:00,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:38:01,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 800 places, 2277 transitions, 75713 flow. Second operand has 21 states, 21 states have (on average 54.857142857142854) internal successors, (1152), 21 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:01,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:01,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:38:01,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:11,222 INFO L124 PetriNetUnfolderBase]: 6170/10285 cut-off events. [2023-08-24 09:38:11,222 INFO L125 PetriNetUnfolderBase]: For 586242/586242 co-relation queries the response was YES. [2023-08-24 09:38:11,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152846 conditions, 10285 events. 6170/10285 cut-off events. For 586242/586242 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 72823 event pairs, 81 based on Foata normal form. 38/10323 useless extension candidates. Maximal degree in co-relation 152328. Up to 7639 conditions per place. [2023-08-24 09:38:11,417 INFO L140 encePairwiseOnDemand]: 137/144 looper letters, 1905 selfloop transitions, 664 changer transitions 20/2589 dead transitions. [2023-08-24 09:38:11,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 837 places, 2589 transitions, 88469 flow [2023-08-24 09:38:11,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 09:38:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 09:38:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2298 transitions. [2023-08-24 09:38:11,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39895833333333336 [2023-08-24 09:38:11,420 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2298 transitions. [2023-08-24 09:38:11,420 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2298 transitions. [2023-08-24 09:38:11,420 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:38:11,420 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2298 transitions. [2023-08-24 09:38:11,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 57.45) internal successors, (2298), 40 states have internal predecessors, (2298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:11,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:11,425 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 144.0) internal successors, (5904), 41 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:11,425 INFO L175 Difference]: Start difference. First operand has 800 places, 2277 transitions, 75713 flow. Second operand 40 states and 2298 transitions. [2023-08-24 09:38:11,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 837 places, 2589 transitions, 88469 flow [2023-08-24 09:38:23,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 2589 transitions, 87113 flow, removed 527 selfloop flow, removed 17 redundant places. [2023-08-24 09:38:23,258 INFO L231 Difference]: Finished difference. Result has 829 places, 2415 transitions, 80110 flow [2023-08-24 09:38:23,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=74213, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=80110, PETRI_PLACES=829, PETRI_TRANSITIONS=2415} [2023-08-24 09:38:23,259 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 809 predicate places. [2023-08-24 09:38:23,259 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2415 transitions, 80110 flow [2023-08-24 09:38:23,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 54.857142857142854) internal successors, (1152), 21 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:23,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:38:23,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:38:23,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 09:38:23,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:23,464 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:38:23,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:38:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash 414574119, now seen corresponding path program 33 times [2023-08-24 09:38:23,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:38:23,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984129265] [2023-08-24 09:38:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:38:23,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:38:23,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:38:24,003 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 09:38:24,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:38:24,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984129265] [2023-08-24 09:38:24,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984129265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:38:24,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637656142] [2023-08-24 09:38:24,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 09:38:24,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:38:24,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:38:24,005 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:38:24,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 09:38:24,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 09:38:24,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:38:24,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-24 09:38:24,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:38:25,695 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 09:38:25,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:38:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:38:35,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637656142] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:38:35,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:38:35,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 22 [2023-08-24 09:38:35,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258459723] [2023-08-24 09:38:35,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:38:35,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 09:38:35,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:38:35,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 09:38:35,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=429, Unknown=2, NotChecked=0, Total=552 [2023-08-24 09:38:35,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:38:35,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2415 transitions, 80110 flow. Second operand has 24 states, 24 states have (on average 55.25) internal successors, (1326), 24 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:38:35,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:38:35,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:38:35,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:38:41,299 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:39:15,369 WARN L234 SmtUtils]: Spent 24.73s on a formula simplification. DAG size of input: 58 DAG size of output: 23 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:39:16,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:39:27,811 WARN L234 SmtUtils]: Spent 7.93s on a formula simplification. DAG size of input: 87 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:39:29,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:39:40,851 INFO L124 PetriNetUnfolderBase]: 8034/13617 cut-off events. [2023-08-24 09:39:40,851 INFO L125 PetriNetUnfolderBase]: For 828689/828689 co-relation queries the response was YES. [2023-08-24 09:39:41,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205832 conditions, 13617 events. 8034/13617 cut-off events. For 828689/828689 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 103443 event pairs, 142 based on Foata normal form. 12/13629 useless extension candidates. Maximal degree in co-relation 205059. Up to 6039 conditions per place. [2023-08-24 09:39:41,149 INFO L140 encePairwiseOnDemand]: 133/144 looper letters, 1944 selfloop transitions, 1311 changer transitions 247/3502 dead transitions. [2023-08-24 09:39:41,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 856 places, 3502 transitions, 123606 flow [2023-08-24 09:39:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 09:39:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 09:39:41,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1785 transitions. [2023-08-24 09:39:41,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4131944444444444 [2023-08-24 09:39:41,153 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1785 transitions. [2023-08-24 09:39:41,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1785 transitions. [2023-08-24 09:39:41,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:39:41,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1785 transitions. [2023-08-24 09:39:41,169 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.5) internal successors, (1785), 30 states have internal predecessors, (1785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:41,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 144.0) internal successors, (4464), 31 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:41,171 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 144.0) internal successors, (4464), 31 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:41,171 INFO L175 Difference]: Start difference. First operand has 829 places, 2415 transitions, 80110 flow. Second operand 30 states and 1785 transitions. [2023-08-24 09:39:41,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 856 places, 3502 transitions, 123606 flow [2023-08-24 09:39:58,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 836 places, 3502 transitions, 122933 flow, removed 224 selfloop flow, removed 20 redundant places. [2023-08-24 09:39:58,417 INFO L231 Difference]: Finished difference. Result has 856 places, 2836 transitions, 98409 flow [2023-08-24 09:39:58,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=79589, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=877, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=98409, PETRI_PLACES=856, PETRI_TRANSITIONS=2836} [2023-08-24 09:39:58,418 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 836 predicate places. [2023-08-24 09:39:58,419 INFO L495 AbstractCegarLoop]: Abstraction has has 856 places, 2836 transitions, 98409 flow [2023-08-24 09:39:58,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 55.25) internal successors, (1326), 24 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:58,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:39:58,419 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:39:58,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 09:39:58,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 09:39:58,623 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:39:58,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:39:58,623 INFO L85 PathProgramCache]: Analyzing trace with hash 385907219, now seen corresponding path program 34 times [2023-08-24 09:39:58,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:39:58,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738326837] [2023-08-24 09:39:58,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:39:58,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:39:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:39:58,959 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 09:39:58,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:39:58,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738326837] [2023-08-24 09:39:58,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738326837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:39:58,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000761930] [2023-08-24 09:39:58,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 09:39:58,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:39:58,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:39:58,960 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:39:58,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 09:39:59,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 09:39:59,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:39:59,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 09:39:59,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:39:59,436 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 09:39:59,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:39:59,891 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 09:39:59,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000761930] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:39:59,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:39:59,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-08-24 09:39:59,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889377230] [2023-08-24 09:39:59,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:39:59,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 09:39:59,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:39:59,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 09:39:59,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2023-08-24 09:39:59,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:39:59,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 856 places, 2836 transitions, 98409 flow. Second operand has 27 states, 27 states have (on average 54.74074074074074) internal successors, (1478), 27 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:39:59,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:39:59,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:39:59,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:40:36,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:40:55,429 INFO L124 PetriNetUnfolderBase]: 10668/17472 cut-off events. [2023-08-24 09:40:55,429 INFO L125 PetriNetUnfolderBase]: For 1299290/1299290 co-relation queries the response was YES. [2023-08-24 09:40:55,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 296661 conditions, 17472 events. 10668/17472 cut-off events. For 1299290/1299290 co-relation queries the response was YES. Maximal size of possible extension queue 1326. Compared 131533 event pairs, 172 based on Foata normal form. 38/17510 useless extension candidates. Maximal degree in co-relation 296367. Up to 11513 conditions per place. [2023-08-24 09:40:56,001 INFO L140 encePairwiseOnDemand]: 136/144 looper letters, 2094 selfloop transitions, 2141 changer transitions 166/4401 dead transitions. [2023-08-24 09:40:56,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 926 places, 4401 transitions, 169368 flow [2023-08-24 09:40:56,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-24 09:40:56,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-24 09:40:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4430 transitions. [2023-08-24 09:40:56,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3995310245310245 [2023-08-24 09:40:56,005 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4430 transitions. [2023-08-24 09:40:56,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4430 transitions. [2023-08-24 09:40:56,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:40:56,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4430 transitions. [2023-08-24 09:40:56,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 57.532467532467535) internal successors, (4430), 77 states have internal predecessors, (4430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:56,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 144.0) internal successors, (11232), 78 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:56,013 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 144.0) internal successors, (11232), 78 states have internal predecessors, (11232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:40:56,013 INFO L175 Difference]: Start difference. First operand has 856 places, 2836 transitions, 98409 flow. Second operand 77 states and 4430 transitions. [2023-08-24 09:40:56,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 926 places, 4401 transitions, 169368 flow [2023-08-24 09:41:27,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 903 places, 4401 transitions, 164355 flow, removed 2412 selfloop flow, removed 23 redundant places. [2023-08-24 09:41:27,680 INFO L231 Difference]: Finished difference. Result has 931 places, 3991 transitions, 149349 flow [2023-08-24 09:41:27,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=96081, PETRI_DIFFERENCE_MINUEND_PLACES=827, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2836, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=149349, PETRI_PLACES=931, PETRI_TRANSITIONS=3991} [2023-08-24 09:41:27,682 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 911 predicate places. [2023-08-24 09:41:27,683 INFO L495 AbstractCegarLoop]: Abstraction has has 931 places, 3991 transitions, 149349 flow [2023-08-24 09:41:27,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 54.74074074074074) internal successors, (1478), 27 states have internal predecessors, (1478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:27,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:41:27,683 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:41:27,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-24 09:41:27,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 09:41:27,890 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:41:27,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:41:27,895 INFO L85 PathProgramCache]: Analyzing trace with hash 787792297, now seen corresponding path program 35 times [2023-08-24 09:41:27,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:41:27,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40472216] [2023-08-24 09:41:27,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:41:27,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:41:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:41:28,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:41:28,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:41:28,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40472216] [2023-08-24 09:41:28,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40472216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:41:28,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59617786] [2023-08-24 09:41:28,043 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 09:41:28,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:41:28,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:41:28,046 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:41:28,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 09:41:28,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 09:41:28,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:41:28,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-24 09:41:28,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:41:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:41:28,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:41:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 09:41:28,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59617786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:41:28,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:41:28,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2023-08-24 09:41:28,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952052613] [2023-08-24 09:41:28,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:41:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 09:41:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:41:28,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 09:41:28,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-08-24 09:41:28,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 144 [2023-08-24 09:41:28,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 931 places, 3991 transitions, 149349 flow. Second operand has 18 states, 18 states have (on average 58.94444444444444) internal successors, (1061), 18 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:28,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:41:28,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 144 [2023-08-24 09:41:28,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:41:57,344 INFO L124 PetriNetUnfolderBase]: 10963/18226 cut-off events. [2023-08-24 09:41:57,344 INFO L125 PetriNetUnfolderBase]: For 1525300/1525300 co-relation queries the response was YES. [2023-08-24 09:41:57,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318258 conditions, 18226 events. 10963/18226 cut-off events. For 1525300/1525300 co-relation queries the response was YES. Maximal size of possible extension queue 1414. Compared 141318 event pairs, 152 based on Foata normal form. 190/18415 useless extension candidates. Maximal degree in co-relation 317944. Up to 11926 conditions per place. [2023-08-24 09:41:57,734 INFO L140 encePairwiseOnDemand]: 139/144 looper letters, 3286 selfloop transitions, 1245 changer transitions 87/4621 dead transitions. [2023-08-24 09:41:57,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 959 places, 4621 transitions, 185408 flow [2023-08-24 09:41:57,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 09:41:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 09:41:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1881 transitions. [2023-08-24 09:41:57,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354166666666667 [2023-08-24 09:41:57,740 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1881 transitions. [2023-08-24 09:41:57,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1881 transitions. [2023-08-24 09:41:57,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 09:41:57,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1881 transitions. [2023-08-24 09:41:57,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 62.7) internal successors, (1881), 30 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:57,743 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 144.0) internal successors, (4464), 31 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:57,744 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 144.0) internal successors, (4464), 31 states have internal predecessors, (4464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:41:57,744 INFO L175 Difference]: Start difference. First operand has 931 places, 3991 transitions, 149349 flow. Second operand 30 states and 1881 transitions. [2023-08-24 09:41:57,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 959 places, 4621 transitions, 185408 flow [2023-08-24 09:42:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 910 places, 4621 transitions, 174901 flow, removed 5020 selfloop flow, removed 49 redundant places. [2023-08-24 09:42:36,141 INFO L231 Difference]: Finished difference. Result has 920 places, 4303 transitions, 160093 flow [2023-08-24 09:42:36,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=144, PETRI_DIFFERENCE_MINUEND_FLOW=138995, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3931, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=909, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2881, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=160093, PETRI_PLACES=920, PETRI_TRANSITIONS=4303} [2023-08-24 09:42:36,143 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 900 predicate places. [2023-08-24 09:42:36,144 INFO L495 AbstractCegarLoop]: Abstraction has has 920 places, 4303 transitions, 160093 flow [2023-08-24 09:42:36,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.94444444444444) internal successors, (1061), 18 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:42:36,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 09:42:36,144 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 09:42:36,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-08-24 09:42:36,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 09:42:36,348 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 09:42:36,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 09:42:36,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1473796843, now seen corresponding path program 36 times [2023-08-24 09:42:36,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 09:42:36,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776448270] [2023-08-24 09:42:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 09:42:36,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 09:42:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 09:42:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:36,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 09:42:36,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776448270] [2023-08-24 09:42:36,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776448270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 09:42:36,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294231848] [2023-08-24 09:42:36,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 09:42:36,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 09:42:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 09:42:36,722 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 09:42:36,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 09:42:36,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-24 09:42:36,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 09:42:36,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 09:42:36,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 09:42:37,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:37,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 09:42:46,484 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 09:42:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294231848] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 09:42:46,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 09:42:46,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 25 [2023-08-24 09:42:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136637604] [2023-08-24 09:42:46,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 09:42:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 09:42:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 09:42:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 09:42:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=505, Unknown=1, NotChecked=0, Total=650 [2023-08-24 09:42:46,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 144 [2023-08-24 09:42:46,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 920 places, 4303 transitions, 160093 flow. Second operand has 26 states, 26 states have (on average 54.76923076923077) internal successors, (1424), 26 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 09:42:46,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 09:42:46,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 144 [2023-08-24 09:42:46,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 09:43:03,619 WARN L234 SmtUtils]: Spent 5.72s on a formula simplification. DAG size of input: 131 DAG size of output: 95 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:43:09,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:18,400 WARN L234 SmtUtils]: Spent 5.74s on a formula simplification. DAG size of input: 106 DAG size of output: 94 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:43:20,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:24,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:26,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:31,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:43,472 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.74s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:48,104 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:43:51,270 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:44:09,227 WARN L234 SmtUtils]: Spent 5.83s on a formula simplification. DAG size of input: 136 DAG size of output: 75 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:44:32,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:44:34,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:44:36,286 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:44:52,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:45:14,436 WARN L234 SmtUtils]: Spent 15.36s on a formula simplification. DAG size of input: 152 DAG size of output: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:45:16,443 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 09:45:18,539 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:45:48,588 WARN L234 SmtUtils]: Spent 10.59s on a formula simplification. DAG size of input: 113 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:45:50,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:17,173 WARN L234 SmtUtils]: Spent 18.33s on a formula simplification. DAG size of input: 110 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:46:26,111 WARN L234 SmtUtils]: Spent 5.21s on a formula simplification. DAG size of input: 119 DAG size of output: 90 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-24 09:46:34,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:37,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:44,524 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:47,935 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:49,949 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:51,956 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:46:57,745 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:47:04,433 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:47:06,237 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2023-08-24 09:47:09,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:47:14,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:47:18,531 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-08-24 09:47:30,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] Received shutdown request... [2023-08-24 09:48:04,569 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 09:48:04,583 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 09:48:04,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-24 09:48:04,806 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 09:48:04,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-08-24 09:48:05,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 09:48:05,011 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 53/144 universal loopers) in iteration 39,while PetriNetUnfolder was constructing finite prefix that currently has 322998 conditions, 18263 events (11220/18262 cut-off events. For 1595967/1595967 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 144817 event pairs, 152 based on Foata normal form. 62/18840 useless extension candidates. Maximal degree in co-relation 322692. Up to 6392 conditions per place.). [2023-08-24 09:48:05,012 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 09:48:05,012 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 09:48:05,013 INFO L445 BasicCegarLoop]: Path program histogram: [36, 2, 1] [2023-08-24 09:48:05,015 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 09:48:05,015 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 09:48:05,016 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 09:48:05 BasicIcfg [2023-08-24 09:48:05,016 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 09:48:05,016 INFO L158 Benchmark]: Toolchain (without parser) took 852800.32ms. Allocated memory was 369.1MB in the beginning and 6.8GB in the end (delta: 6.5GB). Free memory was 345.7MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.8GB. Max. memory is 16.0GB. [2023-08-24 09:48:05,017 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 369.1MB. Free memory is still 345.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 09:48:05,017 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.77ms. Allocated memory is still 369.1MB. Free memory was 345.3MB in the beginning and 334.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 09:48:05,017 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.22ms. Allocated memory is still 369.1MB. Free memory was 334.7MB in the beginning and 333.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:48:05,017 INFO L158 Benchmark]: Boogie Preprocessor took 24.73ms. Allocated memory is still 369.1MB. Free memory was 333.1MB in the beginning and 331.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 09:48:05,017 INFO L158 Benchmark]: RCFGBuilder took 334.84ms. Allocated memory is still 369.1MB. Free memory was 331.9MB in the beginning and 317.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-24 09:48:05,018 INFO L158 Benchmark]: TraceAbstraction took 852256.40ms. Allocated memory was 369.1MB in the beginning and 6.8GB in the end (delta: 6.5GB). Free memory was 317.2MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.8GB. Max. memory is 16.0GB. [2023-08-24 09:48:05,018 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 369.1MB. Free memory is still 345.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 153.77ms. Allocated memory is still 369.1MB. Free memory was 345.3MB in the beginning and 334.7MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 24.22ms. Allocated memory is still 369.1MB. Free memory was 334.7MB in the beginning and 333.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.73ms. Allocated memory is still 369.1MB. Free memory was 333.1MB in the beginning and 331.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 334.84ms. Allocated memory is still 369.1MB. Free memory was 331.9MB in the beginning and 317.9MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 852256.40ms. Allocated memory was 369.1MB in the beginning and 6.8GB in the end (delta: 6.5GB). Free memory was 317.2MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 4.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 71 PlacesBefore, 20 PlacesAfterwards, 70 TransitionsBefore, 15 TransitionsAfterwards, 436 CoEnabledTransitionPairs, 6 FixpointIterations, 35 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 468 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 463, independent: 461, independent conditional: 0, independent unconditional: 461, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 238, independent: 236, independent conditional: 0, independent unconditional: 236, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 463, independent: 225, independent conditional: 0, independent unconditional: 225, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 238, unknown conditional: 0, unknown unconditional: 238] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 53/144 universal loopers) in iteration 39,while PetriNetUnfolder was constructing finite prefix that currently has 322998 conditions, 18263 events (11220/18262 cut-off events. For 1595967/1595967 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 144817 event pairs, 152 based on Foata normal form. 62/18840 useless extension candidates. Maximal degree in co-relation 322692. Up to 6392 conditions per place.). - TimeoutResultAtElement [Line: 72]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 53/144 universal loopers) in iteration 39,while PetriNetUnfolder was constructing finite prefix that currently has 322998 conditions, 18263 events (11220/18262 cut-off events. For 1595967/1595967 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 144817 event pairs, 152 based on Foata normal form. 62/18840 useless extension candidates. Maximal degree in co-relation 322692. Up to 6392 conditions per place.). - TimeoutResultAtElement [Line: 73]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (26states, 53/144 universal loopers) in iteration 39,while PetriNetUnfolder was constructing finite prefix that currently has 322998 conditions, 18263 events (11220/18262 cut-off events. For 1595967/1595967 co-relation queries the response was YES. Maximal size of possible extension queue 1624. Compared 144817 event pairs, 152 based on Foata normal form. 62/18840 useless extension candidates. Maximal degree in co-relation 322692. Up to 6392 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 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: 852.2s, OverallIterations: 39, TraceHistogramMax: 3, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 797.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 28 mSolverCounterUnknown, 3869 SdHoareTripleChecker+Valid, 114.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3869 mSDsluCounter, 630 SdHoareTripleChecker+Invalid, 112.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 468 mSDsCounter, 1285 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20310 IncrementalHoareTripleChecker+Invalid, 21623 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1285 mSolverCounterUnsat, 162 mSDtfsCounter, 20310 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2742 GetRequests, 1285 SyntacticMatches, 40 SemanticMatches, 1417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18799 ImplicationChecksByTransitivity, 392.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160093occurred in iteration=38, InterpolantAutomatonStates: 1143, 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: 0.2s SsaConstructionTime, 1.3s SatisfiabilityAnalysisTime, 42.3s InterpolantComputationTime, 1289 NumberOfCodeBlocks, 1278 NumberOfCodeBlocksAsserted, 125 NumberOfCheckSat, 1802 ConstructedInterpolants, 0 QuantifiedInterpolants, 18589 SizeOfPredicates, 284 NumberOfNonLiveVariables, 4406 ConjunctsInSsa, 560 ConjunctsInUnsatCore, 111 InterpolantComputations, 3 PerfectInterpolantSequences, 121/794 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