/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:15:26,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:15:26,678 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-SemanticLbe.epf [2023-11-17 12:15:26,698 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:15:26,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:15:26,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:15:26,700 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:15:26,700 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:15:26,701 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:15:26,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:15:26,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:15:26,703 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:15:26,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:15:26,705 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:15:26,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:15:26,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:15:26,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:15:26,706 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:15:26,706 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:15:26,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:15:26,706 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:15:26,707 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:15:26,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:15:26,707 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:15:26,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:15:26,707 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:15:26,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:15:26,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:15:26,708 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:15:26,708 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:15:26,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:15:26,709 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:15:26,709 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:15:26,947 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:15:26,976 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:15:26,978 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:15:26,980 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:15:26,980 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:15:26,982 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-11-17 12:15:28,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:15:28,426 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:15:28,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1.wvr.c [2023-11-17 12:15:28,432 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b7e8ef7/80633726872d436e8afbf68d8a0e1cef/FLAG97919a560 [2023-11-17 12:15:28,443 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/74b7e8ef7/80633726872d436e8afbf68d8a0e1cef [2023-11-17 12:15:28,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:15:28,446 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:15:28,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:15:28,448 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:15:28,452 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:15:28,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,453 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@650d234a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28, skipping insertion in model container [2023-11-17 12:15:28,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,473 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:15:28,598 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-figure1.wvr.c[2017,2030] [2023-11-17 12:15:28,603 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:15:28,613 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:15:28,632 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-figure1.wvr.c[2017,2030] [2023-11-17 12:15:28,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:15:28,640 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:15:28,640 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:15:28,646 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:15:28,647 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28 WrapperNode [2023-11-17 12:15:28,647 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:15:28,648 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:15:28,648 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:15:28,648 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:15:28,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,658 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,678 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-11-17 12:15:28,679 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:15:28,679 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:15:28,680 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:15:28,680 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:15:28,687 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,694 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,695 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,699 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,701 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:15:28,708 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:15:28,708 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:15:28,708 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:15:28,709 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (1/1) ... [2023-11-17 12:15:28,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:15:28,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:28,752 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) [2023-11-17 12:15:28,764 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 [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:15:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:15:28,777 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:15:28,777 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:15:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:15:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:15:28,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:15:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:15:28,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:15:28,779 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:15:28,844 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:15:28,845 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:15:29,023 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:15:29,180 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:15:29,181 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:15:29,183 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:15:29 BoogieIcfgContainer [2023-11-17 12:15:29,183 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:15:29,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:15:29,186 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:15:29,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:15:29,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:15:28" (1/3) ... [2023-11-17 12:15:29,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557df770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:15:29, skipping insertion in model container [2023-11-17 12:15:29,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:15:28" (2/3) ... [2023-11-17 12:15:29,191 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@557df770 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:15:29, skipping insertion in model container [2023-11-17 12:15:29,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:15:29" (3/3) ... [2023-11-17 12:15:29,192 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-17 12:15:29,210 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:15:29,210 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:15:29,210 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:15:29,251 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:15:29,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 23 transitions, 60 flow [2023-11-17 12:15:29,313 INFO L124 PetriNetUnfolderBase]: 2/21 cut-off events. [2023-11-17 12:15:29,313 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:15:29,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30 conditions, 21 events. 2/21 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:15:29,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 23 transitions, 60 flow [2023-11-17 12:15:29,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:29,329 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:15:29,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:29,343 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:29,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 25 places, 20 transitions, 52 flow [2023-11-17 12:15:29,350 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-11-17 12:15:29,350 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:15:29,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 20 events. 2/20 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 15. Up to 2 conditions per place. [2023-11-17 12:15:29,351 INFO L119 LiptonReduction]: Number of co-enabled transitions 110 [2023-11-17 12:15:29,531 INFO L134 LiptonReduction]: Checked pairs total: 127 [2023-11-17 12:15:29,532 INFO L136 LiptonReduction]: Total number of compositions: 5 [2023-11-17 12:15:29,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:15:29,574 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=LoopHeads, 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;@864aad5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:15:29,574 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:15:29,579 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:15:29,580 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:15:29,580 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:15:29,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:29,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:29,584 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:29,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:29,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1776594399, now seen corresponding path program 1 times [2023-11-17 12:15:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:29,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430409401] [2023-11-17 12:15:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:29,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:29,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:29,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430409401] [2023-11-17 12:15:29,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430409401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:29,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:29,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:15:29,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87034633] [2023-11-17 12:15:29,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:29,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:15:29,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:29,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:15:29,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:15:29,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:15:29,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:29,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:29,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:15:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:29,977 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-17 12:15:29,977 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-17 12:15:29,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 116 events. 60/116 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 298 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 188. Up to 61 conditions per place. [2023-11-17 12:15:29,979 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-17 12:15:29,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-11-17 12:15:29,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:15:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:15:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 42 transitions. [2023-11-17 12:15:29,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:15:29,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 42 transitions. [2023-11-17 12:15:29,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 42 transitions. [2023-11-17 12:15:29,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:29,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 42 transitions. [2023-11-17 12:15:29,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:29,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:29,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,000 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 42 transitions. [2023-11-17 12:15:30,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-11-17 12:15:30,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:15:30,004 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-11-17 12:15:30,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, 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=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-17 12:15:30,010 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-17 12:15:30,010 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-11-17 12:15:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:30,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:30,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:15:30,012 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:30,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:30,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1899047568, now seen corresponding path program 1 times [2023-11-17 12:15:30,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:30,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067626200] [2023-11-17 12:15:30,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:30,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:30,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:30,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067626200] [2023-11-17 12:15:30,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067626200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:30,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:30,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:15:30,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118797932] [2023-11-17 12:15:30,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:30,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:30,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:30,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:30,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:30,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:30,228 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-17 12:15:30,229 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-17 12:15:30,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 66/126 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 343 event pairs, 37 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 130. Up to 106 conditions per place. [2023-11-17 12:15:30,232 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-17 12:15:30,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 132 flow [2023-11-17 12:15:30,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:30,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:30,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2023-11-17 12:15:30,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3142857142857143 [2023-11-17 12:15:30,237 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 44 transitions. [2023-11-17 12:15:30,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 44 transitions. [2023-11-17 12:15:30,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:30,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 44 transitions. [2023-11-17 12:15:30,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,242 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,242 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 44 transitions. [2023-11-17 12:15:30,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 132 flow [2023-11-17 12:15:30,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:15:30,245 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 75 flow [2023-11-17 12:15:30,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-17 12:15:30,246 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-17 12:15:30,247 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 75 flow [2023-11-17 12:15:30,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:30,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:30,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:15:30,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:30,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:30,252 INFO L85 PathProgramCache]: Analyzing trace with hash -303707258, now seen corresponding path program 2 times [2023-11-17 12:15:30,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:30,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640508417] [2023-11-17 12:15:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:30,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:30,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:30,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:30,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640508417] [2023-11-17 12:15:30,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640508417] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:30,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346065520] [2023-11-17 12:15:30,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:30,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:30,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:30,357 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) [2023-11-17 12:15:30,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:15:30,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:30,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:30,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:15:30,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:30,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:30,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:30,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346065520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:30,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:30,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:15:30,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069532485] [2023-11-17 12:15:30,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:30,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:15:30,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:30,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:15:30,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:15:30,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:30,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 75 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:30,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:30,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:30,700 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-17 12:15:30,700 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-17 12:15:30,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 105 events. 56/105 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 268 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 197. Up to 34 conditions per place. [2023-11-17 12:15:30,702 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 32 selfloop transitions, 9 changer transitions 0/41 dead transitions. [2023-11-17 12:15:30,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 231 flow [2023-11-17 12:15:30,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:15:30,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:15:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2023-11-17 12:15:30,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2023-11-17 12:15:30,705 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 63 transitions. [2023-11-17 12:15:30,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 63 transitions. [2023-11-17 12:15:30,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:30,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 63 transitions. [2023-11-17 12:15:30,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,707 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,707 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 75 flow. Second operand 7 states and 63 transitions. [2023-11-17 12:15:30,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 231 flow [2023-11-17 12:15:30,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 215 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:30,710 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 117 flow [2023-11-17 12:15:30,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-17 12:15:30,710 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-17 12:15:30,711 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 117 flow [2023-11-17 12:15:30,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:30,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:30,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:30,717 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 12:15:30,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:30,912 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:30,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:30,913 INFO L85 PathProgramCache]: Analyzing trace with hash -357770120, now seen corresponding path program 3 times [2023-11-17 12:15:30,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:30,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833919558] [2023-11-17 12:15:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:30,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:31,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833919558] [2023-11-17 12:15:31,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833919558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:31,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:31,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:15:31,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349670681] [2023-11-17 12:15:31,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:31,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:31,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:31,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:31,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:31,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:31,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:31,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:31,141 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-11-17 12:15:31,141 INFO L125 PetriNetUnfolderBase]: For 210/210 co-relation queries the response was YES. [2023-11-17 12:15:31,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 136 events. 71/136 cut-off events. For 210/210 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 362 event pairs, 17 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 221. Up to 75 conditions per place. [2023-11-17 12:15:31,143 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 32 selfloop transitions, 8 changer transitions 2/42 dead transitions. [2023-11-17 12:15:31,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-11-17 12:15:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-17 12:15:31,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34285714285714286 [2023-11-17 12:15:31,144 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-17 12:15:31,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-17 12:15:31,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:31,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-17 12:15:31,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,146 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,146 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,146 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 117 flow. Second operand 5 states and 48 transitions. [2023-11-17 12:15:31,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-11-17 12:15:31,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 248 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-17 12:15:31,149 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 142 flow [2023-11-17 12:15:31,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-17 12:15:31,150 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-17 12:15:31,150 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 142 flow [2023-11-17 12:15:31,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:31,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:31,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:15:31,151 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:31,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:31,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2143557496, now seen corresponding path program 4 times [2023-11-17 12:15:31,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:31,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813386053] [2023-11-17 12:15:31,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:31,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:31,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813386053] [2023-11-17 12:15:31,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813386053] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:31,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828285610] [2023-11-17 12:15:31,271 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:31,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:31,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:31,273 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) [2023-11-17 12:15:31,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:15:31,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:31,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:31,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:15:31,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828285610] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:31,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:31,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:15:31,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141369682] [2023-11-17 12:15:31,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:31,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:15:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:31,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:15:31,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:15:31,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:31,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:31,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:31,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:31,551 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2023-11-17 12:15:31,552 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-17 12:15:31,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 161 events. 86/161 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 475 event pairs, 14 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 235. Up to 82 conditions per place. [2023-11-17 12:15:31,554 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 40 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-11-17 12:15:31,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 403 flow [2023-11-17 12:15:31,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:15:31,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:15:31,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 81 transitions. [2023-11-17 12:15:31,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2892857142857143 [2023-11-17 12:15:31,556 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 81 transitions. [2023-11-17 12:15:31,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 81 transitions. [2023-11-17 12:15:31,556 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:31,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 81 transitions. [2023-11-17 12:15:31,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.1) internal successors, (81), 10 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,558 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,558 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 142 flow. Second operand 10 states and 81 transitions. [2023-11-17 12:15:31,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 403 flow [2023-11-17 12:15:31,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 365 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-17 12:15:31,562 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 220 flow [2023-11-17 12:15:31,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=220, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-11-17 12:15:31,563 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-17 12:15:31,563 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 220 flow [2023-11-17 12:15:31,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:31,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:31,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:31,769 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 [2023-11-17 12:15:31,769 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:31,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash -471917784, now seen corresponding path program 5 times [2023-11-17 12:15:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821729290] [2023-11-17 12:15:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821729290] [2023-11-17 12:15:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821729290] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664844030] [2023-11-17 12:15:31,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:31,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:31,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:31,831 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) [2023-11-17 12:15:31,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:15:31,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:31,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:31,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:15:31,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:31,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:31,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:31,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664844030] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:31,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:31,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:15:31,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720265202] [2023-11-17 12:15:31,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:31,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:15:31,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:31,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:15:31,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:15:31,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:31,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:31,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:31,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:32,068 INFO L124 PetriNetUnfolderBase]: 80/155 cut-off events. [2023-11-17 12:15:32,068 INFO L125 PetriNetUnfolderBase]: For 532/532 co-relation queries the response was YES. [2023-11-17 12:15:32,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 155 events. 80/155 cut-off events. For 532/532 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 445 event pairs, 21 based on Foata normal form. 6/161 useless extension candidates. Maximal degree in co-relation 573. Up to 105 conditions per place. [2023-11-17 12:15:32,070 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 30 selfloop transitions, 16 changer transitions 1/47 dead transitions. [2023-11-17 12:15:32,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 393 flow [2023-11-17 12:15:32,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:15:32,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:15:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 54 transitions. [2023-11-17 12:15:32,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2023-11-17 12:15:32,072 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 54 transitions. [2023-11-17 12:15:32,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 54 transitions. [2023-11-17 12:15:32,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:32,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 54 transitions. [2023-11-17 12:15:32,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,078 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,078 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 220 flow. Second operand 6 states and 54 transitions. [2023-11-17 12:15:32,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 393 flow [2023-11-17 12:15:32,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 347 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-17 12:15:32,084 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 262 flow [2023-11-17 12:15:32,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-11-17 12:15:32,086 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-11-17 12:15:32,087 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 262 flow [2023-11-17 12:15:32,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.3) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:32,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:32,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:32,296 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 [2023-11-17 12:15:32,297 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:32,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:32,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2049949402, now seen corresponding path program 6 times [2023-11-17 12:15:32,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:32,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053645684] [2023-11-17 12:15:32,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:32,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:32,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:32,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:32,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053645684] [2023-11-17 12:15:32,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053645684] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:15:32,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:15:32,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:15:32,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997432940] [2023-11-17 12:15:32,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:15:32,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:32,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:32,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:32,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:32,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:32,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:32,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:32,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:32,451 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-11-17 12:15:32,452 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-11-17 12:15:32,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 140 events. 75/140 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 17 based on Foata normal form. 2/142 useless extension candidates. Maximal degree in co-relation 523. Up to 87 conditions per place. [2023-11-17 12:15:32,454 INFO L140 encePairwiseOnDemand]: 23/28 looper letters, 26 selfloop transitions, 14 changer transitions 2/42 dead transitions. [2023-11-17 12:15:32,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 363 flow [2023-11-17 12:15:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:32,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:32,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 42 transitions. [2023-11-17 12:15:32,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3 [2023-11-17 12:15:32,455 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 42 transitions. [2023-11-17 12:15:32,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 42 transitions. [2023-11-17 12:15:32,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:32,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 42 transitions. [2023-11-17 12:15:32,459 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,459 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,459 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 262 flow. Second operand 5 states and 42 transitions. [2023-11-17 12:15:32,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 363 flow [2023-11-17 12:15:32,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 287 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-17 12:15:32,463 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 210 flow [2023-11-17 12:15:32,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-17 12:15:32,464 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-17 12:15:32,464 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 210 flow [2023-11-17 12:15:32,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:32,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:32,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:15:32,465 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:32,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:32,465 INFO L85 PathProgramCache]: Analyzing trace with hash 205470824, now seen corresponding path program 1 times [2023-11-17 12:15:32,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:32,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366117382] [2023-11-17 12:15:32,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:32,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:32,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:32,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366117382] [2023-11-17 12:15:32,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366117382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:32,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714680515] [2023-11-17 12:15:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:32,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:32,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:32,593 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) [2023-11-17 12:15:32,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:15:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:32,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 12:15:32,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:32,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:32,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:32,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714680515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:32,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:32,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 2 [2023-11-17 12:15:32,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784888607] [2023-11-17 12:15:32,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:32,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 12:15:32,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:32,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 12:15:32,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 12:15:32,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:15:32,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:32,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:15:32,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:32,786 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2023-11-17 12:15:32,786 INFO L125 PetriNetUnfolderBase]: For 419/419 co-relation queries the response was YES. [2023-11-17 12:15:32,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 254 events. 136/254 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 863 event pairs, 18 based on Foata normal form. 7/261 useless extension candidates. Maximal degree in co-relation 827. Up to 123 conditions per place. [2023-11-17 12:15:32,788 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 45 selfloop transitions, 11 changer transitions 11/67 dead transitions. [2023-11-17 12:15:32,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 504 flow [2023-11-17 12:15:32,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 12:15:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 12:15:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2023-11-17 12:15:32,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5267857142857143 [2023-11-17 12:15:32,790 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 59 transitions. [2023-11-17 12:15:32,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 59 transitions. [2023-11-17 12:15:32,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:32,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 59 transitions. [2023-11-17 12:15:32,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,793 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,793 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 210 flow. Second operand 4 states and 59 transitions. [2023-11-17 12:15:32,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 504 flow [2023-11-17 12:15:32,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 458 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-17 12:15:32,797 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 282 flow [2023-11-17 12:15:32,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-17 12:15:32,799 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-17 12:15:32,800 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 282 flow [2023-11-17 12:15:32,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:32,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:32,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:32,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:33,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:33,006 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:33,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -738436307, now seen corresponding path program 2 times [2023-11-17 12:15:33,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:33,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200758552] [2023-11-17 12:15:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:33,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200758552] [2023-11-17 12:15:33,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200758552] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:33,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628655428] [2023-11-17 12:15:33,090 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:33,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:33,091 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) [2023-11-17 12:15:33,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:15:33,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:33,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:33,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:33,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:33,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:33,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:33,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628655428] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:33,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:33,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:33,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816501241] [2023-11-17 12:15:33,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:33,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:33,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:33,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:33,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:33,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:33,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:33,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:33,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:33,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:33,435 INFO L124 PetriNetUnfolderBase]: 182/328 cut-off events. [2023-11-17 12:15:33,435 INFO L125 PetriNetUnfolderBase]: For 626/626 co-relation queries the response was YES. [2023-11-17 12:15:33,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 328 events. 182/328 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1190 event pairs, 34 based on Foata normal form. 12/340 useless extension candidates. Maximal degree in co-relation 1239. Up to 169 conditions per place. [2023-11-17 12:15:33,438 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 49 selfloop transitions, 37 changer transitions 1/87 dead transitions. [2023-11-17 12:15:33,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 741 flow [2023-11-17 12:15:33,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:15:33,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:15:33,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2023-11-17 12:15:33,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2774725274725275 [2023-11-17 12:15:33,440 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 101 transitions. [2023-11-17 12:15:33,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 101 transitions. [2023-11-17 12:15:33,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:33,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 101 transitions. [2023-11-17 12:15:33,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:33,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:33,443 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:33,443 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 282 flow. Second operand 13 states and 101 transitions. [2023-11-17 12:15:33,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 741 flow [2023-11-17 12:15:33,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 715 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-11-17 12:15:33,448 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 571 flow [2023-11-17 12:15:33,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=571, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-11-17 12:15:33,449 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 12:15:33,449 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 571 flow [2023-11-17 12:15:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:33,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:33,449 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:33,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:33,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:33,655 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:33,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:33,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1966356383, now seen corresponding path program 3 times [2023-11-17 12:15:33,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:33,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895764109] [2023-11-17 12:15:33,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:33,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:33,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895764109] [2023-11-17 12:15:33,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895764109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:33,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990893862] [2023-11-17 12:15:33,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:33,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:33,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:33,732 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) [2023-11-17 12:15:33,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:15:33,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:15:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:33,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:33,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:33,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:33,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:33,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990893862] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:33,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:33,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:15:33,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132329886] [2023-11-17 12:15:33,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:33,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:15:33,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:33,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:15:33,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:15:33,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:33,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 571 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:33,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:33,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:33,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:34,089 INFO L124 PetriNetUnfolderBase]: 209/382 cut-off events. [2023-11-17 12:15:34,090 INFO L125 PetriNetUnfolderBase]: For 1115/1115 co-relation queries the response was YES. [2023-11-17 12:15:34,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 382 events. 209/382 cut-off events. For 1115/1115 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1470 event pairs, 15 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 1758. Up to 122 conditions per place. [2023-11-17 12:15:34,093 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 67 selfloop transitions, 32 changer transitions 12/111 dead transitions. [2023-11-17 12:15:34,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 111 transitions, 1093 flow [2023-11-17 12:15:34,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:15:34,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:15:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 90 transitions. [2023-11-17 12:15:34,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32142857142857145 [2023-11-17 12:15:34,095 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 90 transitions. [2023-11-17 12:15:34,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 90 transitions. [2023-11-17 12:15:34,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:34,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 90 transitions. [2023-11-17 12:15:34,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,096 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,097 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 571 flow. Second operand 10 states and 90 transitions. [2023-11-17 12:15:34,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 111 transitions, 1093 flow [2023-11-17 12:15:34,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 897 flow, removed 74 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:34,107 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 651 flow [2023-11-17 12:15:34,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=651, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-17 12:15:34,108 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-11-17 12:15:34,108 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 651 flow [2023-11-17 12:15:34,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:34,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:34,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:34,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:34,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:34,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash 278717657, now seen corresponding path program 4 times [2023-11-17 12:15:34,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:34,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093543185] [2023-11-17 12:15:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:34,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:34,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093543185] [2023-11-17 12:15:34,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093543185] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:34,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224059978] [2023-11-17 12:15:34,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:34,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:34,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:34,388 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) [2023-11-17 12:15:34,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:15:34,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:34,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:34,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:34,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:34,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:34,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224059978] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:34,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:34,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:15:34,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783380317] [2023-11-17 12:15:34,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:34,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:34,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:34,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:34,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:34,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:34,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 651 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:34,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:34,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:34,786 INFO L124 PetriNetUnfolderBase]: 244/426 cut-off events. [2023-11-17 12:15:34,786 INFO L125 PetriNetUnfolderBase]: For 1625/1625 co-relation queries the response was YES. [2023-11-17 12:15:34,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 426 events. 244/426 cut-off events. For 1625/1625 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1581 event pairs, 24 based on Foata normal form. 22/448 useless extension candidates. Maximal degree in co-relation 2021. Up to 162 conditions per place. [2023-11-17 12:15:34,790 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 74 selfloop transitions, 52 changer transitions 0/126 dead transitions. [2023-11-17 12:15:34,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 126 transitions, 1241 flow [2023-11-17 12:15:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:15:34,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:15:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 115 transitions. [2023-11-17 12:15:34,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29336734693877553 [2023-11-17 12:15:34,791 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 115 transitions. [2023-11-17 12:15:34,791 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 115 transitions. [2023-11-17 12:15:34,791 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:34,791 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 115 transitions. [2023-11-17 12:15:34,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,793 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 28.0) internal successors, (420), 15 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,793 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 651 flow. Second operand 14 states and 115 transitions. [2023-11-17 12:15:34,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 126 transitions, 1241 flow [2023-11-17 12:15:34,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 126 transitions, 1167 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:34,803 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 989 flow [2023-11-17 12:15:34,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=989, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-11-17 12:15:34,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-11-17 12:15:34,804 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 989 flow [2023-11-17 12:15:34,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:34,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:34,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:34,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:35,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:35,009 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:35,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash -33617171, now seen corresponding path program 5 times [2023-11-17 12:15:35,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:35,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298435483] [2023-11-17 12:15:35,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:35,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:35,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:35,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298435483] [2023-11-17 12:15:35,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298435483] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:35,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244956833] [2023-11-17 12:15:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:35,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:35,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:35,073 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) [2023-11-17 12:15:35,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:15:35,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:35,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:35,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:35,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:35,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:35,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:35,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244956833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:35,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:35,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:35,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777695373] [2023-11-17 12:15:35,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:35,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:35,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:35,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:35,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 989 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:35,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:35,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:35,493 INFO L124 PetriNetUnfolderBase]: 247/455 cut-off events. [2023-11-17 12:15:35,493 INFO L125 PetriNetUnfolderBase]: For 2847/2847 co-relation queries the response was YES. [2023-11-17 12:15:35,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 455 events. 247/455 cut-off events. For 2847/2847 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1840 event pairs, 26 based on Foata normal form. 26/481 useless extension candidates. Maximal degree in co-relation 2326. Up to 175 conditions per place. [2023-11-17 12:15:35,496 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 58 selfloop transitions, 72 changer transitions 1/131 dead transitions. [2023-11-17 12:15:35,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 131 transitions, 1463 flow [2023-11-17 12:15:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:35,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:35,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 126 transitions. [2023-11-17 12:15:35,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28125 [2023-11-17 12:15:35,498 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 126 transitions. [2023-11-17 12:15:35,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 126 transitions. [2023-11-17 12:15:35,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:35,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 126 transitions. [2023-11-17 12:15:35,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.875) internal successors, (126), 16 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,500 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,500 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 989 flow. Second operand 16 states and 126 transitions. [2023-11-17 12:15:35,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 131 transitions, 1463 flow [2023-11-17 12:15:35,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1313 flow, removed 61 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:35,510 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 1100 flow [2023-11-17 12:15:35,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1100, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2023-11-17 12:15:35,510 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2023-11-17 12:15:35,510 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 1100 flow [2023-11-17 12:15:35,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:35,511 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:35,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:35,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-17 12:15:35,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:35,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:35,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1500134315, now seen corresponding path program 6 times [2023-11-17 12:15:35,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:35,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307585858] [2023-11-17 12:15:35,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:35,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:35,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:35,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:35,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307585858] [2023-11-17 12:15:35,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307585858] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:35,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119011619] [2023-11-17 12:15:35,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:35,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:35,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:35,786 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) [2023-11-17 12:15:35,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:15:35,851 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:15:35,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:35,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:35,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:35,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:35,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:35,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119011619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:35,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:35,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:15:35,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191399190] [2023-11-17 12:15:35,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:35,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:35,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:35,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:35,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:35,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:35,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 1100 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:35,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:35,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:35,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:36,443 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-11-17 12:15:36,443 INFO L125 PetriNetUnfolderBase]: For 4248/4248 co-relation queries the response was YES. [2023-11-17 12:15:36,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4231 conditions, 722 events. 396/722 cut-off events. For 4248/4248 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3376 event pairs, 28 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 3863. Up to 237 conditions per place. [2023-11-17 12:15:36,450 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-11-17 12:15:36,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 2452 flow [2023-11-17 12:15:36,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:15:36,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:15:36,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 172 transitions. [2023-11-17 12:15:36,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2670807453416149 [2023-11-17 12:15:36,451 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 172 transitions. [2023-11-17 12:15:36,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 172 transitions. [2023-11-17 12:15:36,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:36,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 172 transitions. [2023-11-17 12:15:36,452 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.478260869565218) internal successors, (172), 23 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:36,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 28.0) internal successors, (672), 24 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:36,454 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 28.0) internal successors, (672), 24 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:36,454 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 1100 flow. Second operand 23 states and 172 transitions. [2023-11-17 12:15:36,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 2452 flow [2023-11-17 12:15:36,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 2200 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-11-17 12:15:36,479 INFO L231 Difference]: Finished difference. Result has 115 places, 165 transitions, 2024 flow [2023-11-17 12:15:36,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2024, PETRI_PLACES=115, PETRI_TRANSITIONS=165} [2023-11-17 12:15:36,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-11-17 12:15:36,480 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 165 transitions, 2024 flow [2023-11-17 12:15:36,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:36,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:36,481 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:36,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:36,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 12:15:36,695 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:36,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:36,695 INFO L85 PathProgramCache]: Analyzing trace with hash -211873953, now seen corresponding path program 7 times [2023-11-17 12:15:36,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:36,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106648598] [2023-11-17 12:15:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:36,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:36,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:36,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106648598] [2023-11-17 12:15:36,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106648598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:36,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354652892] [2023-11-17 12:15:36,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:36,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:36,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:36,796 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) [2023-11-17 12:15:36,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:15:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:36,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:36,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:36,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:36,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354652892] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:36,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:36,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:15:36,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468315277] [2023-11-17 12:15:36,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:36,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:36,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:36,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:36,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:36,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:36,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 165 transitions, 2024 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:36,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:36,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:36,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:37,294 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-11-17 12:15:37,294 INFO L125 PetriNetUnfolderBase]: For 6347/6347 co-relation queries the response was YES. [2023-11-17 12:15:37,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 790 events. 438/790 cut-off events. For 6347/6347 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3698 event pairs, 97 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 4779. Up to 620 conditions per place. [2023-11-17 12:15:37,303 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-11-17 12:15:37,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 225 transitions, 3053 flow [2023-11-17 12:15:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 12:15:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 12:15:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 144 transitions. [2023-11-17 12:15:37,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2857142857142857 [2023-11-17 12:15:37,304 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 144 transitions. [2023-11-17 12:15:37,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 144 transitions. [2023-11-17 12:15:37,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:37,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 144 transitions. [2023-11-17 12:15:37,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 8.0) internal successors, (144), 18 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,306 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 28.0) internal successors, (532), 19 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,306 INFO L175 Difference]: Start difference. First operand has 115 places, 165 transitions, 2024 flow. Second operand 18 states and 144 transitions. [2023-11-17 12:15:37,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 225 transitions, 3053 flow [2023-11-17 12:15:37,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 225 transitions, 2895 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-11-17 12:15:37,335 INFO L231 Difference]: Finished difference. Result has 136 places, 193 transitions, 2504 flow [2023-11-17 12:15:37,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2504, PETRI_PLACES=136, PETRI_TRANSITIONS=193} [2023-11-17 12:15:37,335 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-17 12:15:37,335 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 193 transitions, 2504 flow [2023-11-17 12:15:37,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:37,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:37,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:37,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-17 12:15:37,541 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:37,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:37,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1073127067, now seen corresponding path program 8 times [2023-11-17 12:15:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406273108] [2023-11-17 12:15:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:37,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:37,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:37,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406273108] [2023-11-17 12:15:37,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406273108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:37,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180244564] [2023-11-17 12:15:37,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:37,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:37,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:37,619 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) [2023-11-17 12:15:37,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:15:37,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:37,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:37,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:37,690 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:37,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:37,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:37,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180244564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:37,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:37,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:15:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289528230] [2023-11-17 12:15:37,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:37,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:15:37,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:37,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:15:37,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:15:37,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:37,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 193 transitions, 2504 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:37,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:37,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:37,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:38,032 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-11-17 12:15:38,032 INFO L125 PetriNetUnfolderBase]: For 9180/9180 co-relation queries the response was YES. [2023-11-17 12:15:38,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 793 events. 443/793 cut-off events. For 9180/9180 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3711 event pairs, 96 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5302. Up to 645 conditions per place. [2023-11-17 12:15:38,041 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-11-17 12:15:38,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 3164 flow [2023-11-17 12:15:38,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:15:38,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:15:38,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 84 transitions. [2023-11-17 12:15:38,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727272727272727 [2023-11-17 12:15:38,043 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 84 transitions. [2023-11-17 12:15:38,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 84 transitions. [2023-11-17 12:15:38,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:38,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 84 transitions. [2023-11-17 12:15:38,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 7.636363636363637) internal successors, (84), 11 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,045 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,045 INFO L175 Difference]: Start difference. First operand has 136 places, 193 transitions, 2504 flow. Second operand 11 states and 84 transitions. [2023-11-17 12:15:38,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 3164 flow [2023-11-17 12:15:38,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 213 transitions, 2790 flow, removed 171 selfloop flow, removed 5 redundant places. [2023-11-17 12:15:38,086 INFO L231 Difference]: Finished difference. Result has 142 places, 195 transitions, 2290 flow [2023-11-17 12:15:38,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2290, PETRI_PLACES=142, PETRI_TRANSITIONS=195} [2023-11-17 12:15:38,088 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2023-11-17 12:15:38,088 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 195 transitions, 2290 flow [2023-11-17 12:15:38,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:38,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:38,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:38,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 12:15:38,294 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:38,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1900601629, now seen corresponding path program 9 times [2023-11-17 12:15:38,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:38,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564467034] [2023-11-17 12:15:38,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:38,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:38,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:38,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564467034] [2023-11-17 12:15:38,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564467034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:38,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682452141] [2023-11-17 12:15:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:38,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:38,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:38,363 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) [2023-11-17 12:15:38,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:15:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:15:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:38,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-17 12:15:38,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:38,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:38,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:38,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:38,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682452141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:38,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:38,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-11-17 12:15:38,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289178642] [2023-11-17 12:15:38,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:38,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:15:38,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:38,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:15:38,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:15:38,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:15:38,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 195 transitions, 2290 flow. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:38,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:15:38,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:38,702 INFO L124 PetriNetUnfolderBase]: 669/1192 cut-off events. [2023-11-17 12:15:38,703 INFO L125 PetriNetUnfolderBase]: For 11883/11883 co-relation queries the response was YES. [2023-11-17 12:15:38,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8029 conditions, 1192 events. 669/1192 cut-off events. For 11883/11883 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6173 event pairs, 40 based on Foata normal form. 7/1199 useless extension candidates. Maximal degree in co-relation 7617. Up to 630 conditions per place. [2023-11-17 12:15:38,716 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 200 selfloop transitions, 81 changer transitions 48/329 dead transitions. [2023-11-17 12:15:38,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 329 transitions, 4446 flow [2023-11-17 12:15:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:15:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:15:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 76 transitions. [2023-11-17 12:15:38,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2023-11-17 12:15:38,717 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 76 transitions. [2023-11-17 12:15:38,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 76 transitions. [2023-11-17 12:15:38,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:38,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 76 transitions. [2023-11-17 12:15:38,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,719 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 28.0) internal successors, (168), 6 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,719 INFO L175 Difference]: Start difference. First operand has 142 places, 195 transitions, 2290 flow. Second operand 5 states and 76 transitions. [2023-11-17 12:15:38,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 329 transitions, 4446 flow [2023-11-17 12:15:38,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 329 transitions, 4347 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-17 12:15:38,773 INFO L231 Difference]: Finished difference. Result has 144 places, 241 transitions, 3107 flow [2023-11-17 12:15:38,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3107, PETRI_PLACES=144, PETRI_TRANSITIONS=241} [2023-11-17 12:15:38,774 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-11-17 12:15:38,775 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 241 transitions, 3107 flow [2023-11-17 12:15:38,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 5 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:38,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:38,775 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:38,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:38,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:15:38,986 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:38,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:38,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1286843442, now seen corresponding path program 10 times [2023-11-17 12:15:38,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:38,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334820754] [2023-11-17 12:15:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:38,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:39,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:39,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:39,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:39,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334820754] [2023-11-17 12:15:39,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334820754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:39,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476708802] [2023-11-17 12:15:39,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:39,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:39,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:39,076 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) [2023-11-17 12:15:39,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:15:39,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:39,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:39,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:39,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:39,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:39,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:39,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476708802] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:39,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:39,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:15:39,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099806979] [2023-11-17 12:15:39,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:39,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:15:39,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:15:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:15:39,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:39,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 241 transitions, 3107 flow. Second operand has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:39,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:39,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:39,629 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-11-17 12:15:39,630 INFO L125 PetriNetUnfolderBase]: For 17035/17035 co-relation queries the response was YES. [2023-11-17 12:15:39,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10322 conditions, 1418 events. 775/1418 cut-off events. For 17035/17035 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7884 event pairs, 31 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 9804. Up to 564 conditions per place. [2023-11-17 12:15:39,647 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-11-17 12:15:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 364 transitions, 5275 flow [2023-11-17 12:15:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:15:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:15:39,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 113 transitions. [2023-11-17 12:15:39,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31043956043956045 [2023-11-17 12:15:39,648 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 113 transitions. [2023-11-17 12:15:39,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 113 transitions. [2023-11-17 12:15:39,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:39,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 113 transitions. [2023-11-17 12:15:39,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.692307692307692) internal successors, (113), 13 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,650 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 28.0) internal successors, (392), 14 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,650 INFO L175 Difference]: Start difference. First operand has 144 places, 241 transitions, 3107 flow. Second operand 13 states and 113 transitions. [2023-11-17 12:15:39,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 364 transitions, 5275 flow [2023-11-17 12:15:39,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 364 transitions, 5169 flow, removed 53 selfloop flow, removed 0 redundant places. [2023-11-17 12:15:39,729 INFO L231 Difference]: Finished difference. Result has 164 places, 303 transitions, 4449 flow [2023-11-17 12:15:39,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4449, PETRI_PLACES=164, PETRI_TRANSITIONS=303} [2023-11-17 12:15:39,730 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-11-17 12:15:39,730 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 303 transitions, 4449 flow [2023-11-17 12:15:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.071428571428571) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:39,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:39,730 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:39,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:39,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 12:15:39,936 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:39,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2063282828, now seen corresponding path program 11 times [2023-11-17 12:15:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:39,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052559263] [2023-11-17 12:15:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:39,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:40,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052559263] [2023-11-17 12:15:40,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052559263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:40,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781207905] [2023-11-17 12:15:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:40,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:40,048 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) [2023-11-17 12:15:40,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:15:40,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:40,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:40,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:40,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:40,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:40,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781207905] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:40,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:40,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:15:40,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335025110] [2023-11-17 12:15:40,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:40,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:15:40,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:40,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:15:40,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:15:40,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:40,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 303 transitions, 4449 flow. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:40,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:40,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:40,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:40,736 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-11-17 12:15:40,736 INFO L125 PetriNetUnfolderBase]: For 21492/21492 co-relation queries the response was YES. [2023-11-17 12:15:40,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1502 events. 841/1502 cut-off events. For 21492/21492 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 8164 event pairs, 77 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 11409. Up to 557 conditions per place. [2023-11-17 12:15:40,755 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-11-17 12:15:40,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 389 transitions, 6191 flow [2023-11-17 12:15:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:15:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:15:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2023-11-17 12:15:40,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2800751879699248 [2023-11-17 12:15:40,757 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 149 transitions. [2023-11-17 12:15:40,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 149 transitions. [2023-11-17 12:15:40,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:40,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 149 transitions. [2023-11-17 12:15:40,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:40,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 28.0) internal successors, (560), 20 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:40,759 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 28.0) internal successors, (560), 20 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:40,759 INFO L175 Difference]: Start difference. First operand has 164 places, 303 transitions, 4449 flow. Second operand 19 states and 149 transitions. [2023-11-17 12:15:40,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 389 transitions, 6191 flow [2023-11-17 12:15:40,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 389 transitions, 6056 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-11-17 12:15:40,863 INFO L231 Difference]: Finished difference. Result has 187 places, 342 transitions, 5471 flow [2023-11-17 12:15:40,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5471, PETRI_PLACES=187, PETRI_TRANSITIONS=342} [2023-11-17 12:15:40,864 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2023-11-17 12:15:40,864 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 342 transitions, 5471 flow [2023-11-17 12:15:40,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:40,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:40,864 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:40,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:41,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:41,065 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:41,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:41,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1696721064, now seen corresponding path program 12 times [2023-11-17 12:15:41,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:41,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35458869] [2023-11-17 12:15:41,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:41,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:41,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:41,142 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35458869] [2023-11-17 12:15:41,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35458869] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:41,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161273634] [2023-11-17 12:15:41,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:41,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:41,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:41,144 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) [2023-11-17 12:15:41,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:15:41,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:15:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:41,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:41,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:41,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:41,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:41,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161273634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:41,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:41,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:15:41,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812243478] [2023-11-17 12:15:41,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:41,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:41,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:41,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:41,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:41,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:41,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 342 transitions, 5471 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:41,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:41,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:41,940 INFO L124 PetriNetUnfolderBase]: 979/1708 cut-off events. [2023-11-17 12:15:41,940 INFO L125 PetriNetUnfolderBase]: For 28876/28876 co-relation queries the response was YES. [2023-11-17 12:15:41,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14802 conditions, 1708 events. 979/1708 cut-off events. For 28876/28876 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 9368 event pairs, 129 based on Foata normal form. 18/1726 useless extension candidates. Maximal degree in co-relation 14309. Up to 885 conditions per place. [2023-11-17 12:15:41,960 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 174 selfloop transitions, 257 changer transitions 7/438 dead transitions. [2023-11-17 12:15:41,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 438 transitions, 7988 flow [2023-11-17 12:15:41,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:15:41,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:15:41,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 144 transitions. [2023-11-17 12:15:41,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2706766917293233 [2023-11-17 12:15:41,961 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 144 transitions. [2023-11-17 12:15:41,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 144 transitions. [2023-11-17 12:15:41,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:41,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 144 transitions. [2023-11-17 12:15:41,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.578947368421052) internal successors, (144), 19 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 28.0) internal successors, (560), 20 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,963 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 28.0) internal successors, (560), 20 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:41,963 INFO L175 Difference]: Start difference. First operand has 187 places, 342 transitions, 5471 flow. Second operand 19 states and 144 transitions. [2023-11-17 12:15:41,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 438 transitions, 7988 flow [2023-11-17 12:15:42,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 438 transitions, 7735 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-11-17 12:15:42,126 INFO L231 Difference]: Finished difference. Result has 206 places, 399 transitions, 7170 flow [2023-11-17 12:15:42,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7170, PETRI_PLACES=206, PETRI_TRANSITIONS=399} [2023-11-17 12:15:42,127 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 186 predicate places. [2023-11-17 12:15:42,127 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 399 transitions, 7170 flow [2023-11-17 12:15:42,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:42,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:42,128 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:42,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:42,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:42,329 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:42,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:42,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1669203474, now seen corresponding path program 13 times [2023-11-17 12:15:42,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:42,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077146562] [2023-11-17 12:15:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:42,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:42,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:42,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:42,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:42,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077146562] [2023-11-17 12:15:42,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077146562] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:42,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636441027] [2023-11-17 12:15:42,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:42,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:42,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:42,419 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) [2023-11-17 12:15:42,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 12:15:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:42,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:42,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:42,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:42,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636441027] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:42,602 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:42,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:15:42,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424532459] [2023-11-17 12:15:42,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:42,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:42,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:42,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:42,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:42,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:42,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 399 transitions, 7170 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:42,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:42,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:42,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:43,270 INFO L124 PetriNetUnfolderBase]: 1070/1885 cut-off events. [2023-11-17 12:15:43,271 INFO L125 PetriNetUnfolderBase]: For 39927/39927 co-relation queries the response was YES. [2023-11-17 12:15:43,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17305 conditions, 1885 events. 1070/1885 cut-off events. For 39927/39927 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 10563 event pairs, 65 based on Foata normal form. 36/1921 useless extension candidates. Maximal degree in co-relation 16791. Up to 513 conditions per place. [2023-11-17 12:15:43,297 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 216 selfloop transitions, 266 changer transitions 6/488 dead transitions. [2023-11-17 12:15:43,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 488 transitions, 9354 flow [2023-11-17 12:15:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:15:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:15:43,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 164 transitions. [2023-11-17 12:15:43,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2789115646258503 [2023-11-17 12:15:43,298 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 164 transitions. [2023-11-17 12:15:43,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 164 transitions. [2023-11-17 12:15:43,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:43,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 164 transitions. [2023-11-17 12:15:43,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.809523809523809) internal successors, (164), 21 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:43,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 28.0) internal successors, (616), 22 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:43,301 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 28.0) internal successors, (616), 22 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:43,301 INFO L175 Difference]: Start difference. First operand has 206 places, 399 transitions, 7170 flow. Second operand 21 states and 164 transitions. [2023-11-17 12:15:43,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 488 transitions, 9354 flow [2023-11-17 12:15:43,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 488 transitions, 8164 flow, removed 357 selfloop flow, removed 14 redundant places. [2023-11-17 12:15:43,462 INFO L231 Difference]: Finished difference. Result has 220 places, 437 transitions, 7579 flow [2023-11-17 12:15:43,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=6110, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7579, PETRI_PLACES=220, PETRI_TRANSITIONS=437} [2023-11-17 12:15:43,462 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-11-17 12:15:43,462 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 437 transitions, 7579 flow [2023-11-17 12:15:43,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:43,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:43,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:43,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:43,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:43,668 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:43,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:43,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1361689880, now seen corresponding path program 14 times [2023-11-17 12:15:43,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:43,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073813341] [2023-11-17 12:15:43,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:43,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:43,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:43,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:43,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:43,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073813341] [2023-11-17 12:15:43,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073813341] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:43,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667000341] [2023-11-17 12:15:43,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:43,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:43,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:43,769 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) [2023-11-17 12:15:43,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 12:15:43,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:43,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:43,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:43,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:43,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:43,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:43,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667000341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:43,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:43,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:15:43,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436054233] [2023-11-17 12:15:43,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:43,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:43,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:43,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:43,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:43,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:43,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 437 transitions, 7579 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:43,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:43,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:43,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:44,648 INFO L124 PetriNetUnfolderBase]: 1082/1949 cut-off events. [2023-11-17 12:15:44,648 INFO L125 PetriNetUnfolderBase]: For 45445/45445 co-relation queries the response was YES. [2023-11-17 12:15:44,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17204 conditions, 1949 events. 1082/1949 cut-off events. For 45445/45445 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11367 event pairs, 72 based on Foata normal form. 38/1987 useless extension candidates. Maximal degree in co-relation 16643. Up to 706 conditions per place. [2023-11-17 12:15:44,670 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 143 selfloop transitions, 348 changer transitions 1/492 dead transitions. [2023-11-17 12:15:44,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 492 transitions, 9212 flow [2023-11-17 12:15:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:15:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:15:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 182 transitions. [2023-11-17 12:15:44,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2708333333333333 [2023-11-17 12:15:44,671 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 182 transitions. [2023-11-17 12:15:44,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 182 transitions. [2023-11-17 12:15:44,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:44,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 182 transitions. [2023-11-17 12:15:44,672 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.583333333333333) internal successors, (182), 24 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:44,673 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:44,673 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:44,673 INFO L175 Difference]: Start difference. First operand has 220 places, 437 transitions, 7579 flow. Second operand 24 states and 182 transitions. [2023-11-17 12:15:44,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 492 transitions, 9212 flow [2023-11-17 12:15:44,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 492 transitions, 8873 flow, removed 95 selfloop flow, removed 13 redundant places. [2023-11-17 12:15:44,936 INFO L231 Difference]: Finished difference. Result has 231 places, 450 transitions, 8348 flow [2023-11-17 12:15:44,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7216, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=332, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8348, PETRI_PLACES=231, PETRI_TRANSITIONS=450} [2023-11-17 12:15:44,937 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-11-17 12:15:44,937 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 450 transitions, 8348 flow [2023-11-17 12:15:44,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:44,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:44,938 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:44,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 12:15:45,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:45,138 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:45,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:45,139 INFO L85 PathProgramCache]: Analyzing trace with hash -179850452, now seen corresponding path program 15 times [2023-11-17 12:15:45,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466885662] [2023-11-17 12:15:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:45,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466885662] [2023-11-17 12:15:45,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466885662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498292124] [2023-11-17 12:15:45,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:45,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:45,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:45,231 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) [2023-11-17 12:15:45,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 12:15:45,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:15:45,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:45,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:45,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:45,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:45,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:45,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498292124] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:45,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:45,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-17 12:15:45,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138458190] [2023-11-17 12:15:45,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:45,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:15:45,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:15:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:15:45,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:45,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 450 transitions, 8348 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:45,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:45,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:45,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:46,247 INFO L124 PetriNetUnfolderBase]: 1335/2402 cut-off events. [2023-11-17 12:15:46,248 INFO L125 PetriNetUnfolderBase]: For 51710/51710 co-relation queries the response was YES. [2023-11-17 12:15:46,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22152 conditions, 2402 events. 1335/2402 cut-off events. For 51710/51710 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 14687 event pairs, 97 based on Foata normal form. 12/2414 useless extension candidates. Maximal degree in co-relation 21549. Up to 747 conditions per place. [2023-11-17 12:15:46,272 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 284 selfloop transitions, 329 changer transitions 0/613 dead transitions. [2023-11-17 12:15:46,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 613 transitions, 12193 flow [2023-11-17 12:15:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:15:46,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:15:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 217 transitions. [2023-11-17 12:15:46,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2672413793103448 [2023-11-17 12:15:46,274 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 217 transitions. [2023-11-17 12:15:46,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 217 transitions. [2023-11-17 12:15:46,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:46,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 217 transitions. [2023-11-17 12:15:46,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 7.482758620689655) internal successors, (217), 29 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:46,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 28.0) internal successors, (840), 30 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) [2023-11-17 12:15:46,277 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 28.0) internal successors, (840), 30 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) [2023-11-17 12:15:46,277 INFO L175 Difference]: Start difference. First operand has 231 places, 450 transitions, 8348 flow. Second operand 29 states and 217 transitions. [2023-11-17 12:15:46,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 613 transitions, 12193 flow [2023-11-17 12:15:46,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 613 transitions, 11393 flow, removed 75 selfloop flow, removed 21 redundant places. [2023-11-17 12:15:46,552 INFO L231 Difference]: Finished difference. Result has 243 places, 552 transitions, 10595 flow [2023-11-17 12:15:46,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=7736, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10595, PETRI_PLACES=243, PETRI_TRANSITIONS=552} [2023-11-17 12:15:46,553 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-11-17 12:15:46,553 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 552 transitions, 10595 flow [2023-11-17 12:15:46,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:46,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:46,554 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:46,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:46,755 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:46,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:46,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1839166316, now seen corresponding path program 16 times [2023-11-17 12:15:46,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126099939] [2023-11-17 12:15:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:46,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:46,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:46,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126099939] [2023-11-17 12:15:46,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126099939] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:46,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004242216] [2023-11-17 12:15:46,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:15:46,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:46,833 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) [2023-11-17 12:15:46,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 12:15:46,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:15:46,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:46,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:46,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:46,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:47,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:47,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004242216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:47,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:47,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-17 12:15:47,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586259064] [2023-11-17 12:15:47,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:47,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:15:47,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:47,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:15:47,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:15:47,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:47,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 552 transitions, 10595 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:47,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:47,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:47,838 INFO L124 PetriNetUnfolderBase]: 1659/2972 cut-off events. [2023-11-17 12:15:47,839 INFO L125 PetriNetUnfolderBase]: For 65845/65845 co-relation queries the response was YES. [2023-11-17 12:15:47,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27930 conditions, 2972 events. 1659/2972 cut-off events. For 65845/65845 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 18919 event pairs, 68 based on Foata normal form. 34/3006 useless extension candidates. Maximal degree in co-relation 27301. Up to 799 conditions per place. [2023-11-17 12:15:47,863 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 180 selfloop transitions, 558 changer transitions 9/747 dead transitions. [2023-11-17 12:15:47,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 747 transitions, 15333 flow [2023-11-17 12:15:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:15:47,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:15:47,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 193 transitions. [2023-11-17 12:15:47,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2651098901098901 [2023-11-17 12:15:47,865 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 193 transitions. [2023-11-17 12:15:47,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 193 transitions. [2023-11-17 12:15:47,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:47,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 193 transitions. [2023-11-17 12:15:47,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.423076923076923) internal successors, (193), 26 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 28.0) internal successors, (756), 27 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,867 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 28.0) internal successors, (756), 27 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,867 INFO L175 Difference]: Start difference. First operand has 243 places, 552 transitions, 10595 flow. Second operand 26 states and 193 transitions. [2023-11-17 12:15:47,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 747 transitions, 15333 flow [2023-11-17 12:15:48,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 747 transitions, 14982 flow, removed 142 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:48,201 INFO L231 Difference]: Finished difference. Result has 272 places, 693 transitions, 14740 flow [2023-11-17 12:15:48,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=10294, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=427, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=14740, PETRI_PLACES=272, PETRI_TRANSITIONS=693} [2023-11-17 12:15:48,202 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 252 predicate places. [2023-11-17 12:15:48,202 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 693 transitions, 14740 flow [2023-11-17 12:15:48,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:48,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:48,203 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:48,207 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:48,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:48,405 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:48,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:48,405 INFO L85 PathProgramCache]: Analyzing trace with hash -2027567448, now seen corresponding path program 17 times [2023-11-17 12:15:48,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:48,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294611762] [2023-11-17 12:15:48,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:48,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:48,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:48,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294611762] [2023-11-17 12:15:48,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294611762] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:48,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469917784] [2023-11-17 12:15:48,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:15:48,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:48,489 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) [2023-11-17 12:15:48,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 12:15:48,566 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:15:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:48,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:48,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:48,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:48,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469917784] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:48,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:48,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:15:48,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966472788] [2023-11-17 12:15:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:15:48,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:15:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:15:48,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:48,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 693 transitions, 14740 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:48,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:48,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:48,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:50,281 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-11-17 12:15:50,281 INFO L125 PetriNetUnfolderBase]: For 112908/112908 co-relation queries the response was YES. [2023-11-17 12:15:50,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44901 conditions, 4340 events. 2423/4340 cut-off events. For 112908/112908 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 29720 event pairs, 141 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 44223. Up to 1133 conditions per place. [2023-11-17 12:15:50,320 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 331 selfloop transitions, 753 changer transitions 10/1094 dead transitions. [2023-11-17 12:15:50,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1094 transitions, 25139 flow [2023-11-17 12:15:50,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:15:50,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:15:50,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 265 transitions. [2023-11-17 12:15:50,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2628968253968254 [2023-11-17 12:15:50,322 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 265 transitions. [2023-11-17 12:15:50,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 265 transitions. [2023-11-17 12:15:50,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:50,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 265 transitions. [2023-11-17 12:15:50,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.361111111111111) internal successors, (265), 36 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 28.0) internal successors, (1036), 37 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,324 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 28.0) internal successors, (1036), 37 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:50,324 INFO L175 Difference]: Start difference. First operand has 272 places, 693 transitions, 14740 flow. Second operand 36 states and 265 transitions. [2023-11-17 12:15:50,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1094 transitions, 25139 flow [2023-11-17 12:15:51,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 1094 transitions, 24173 flow, removed 358 selfloop flow, removed 10 redundant places. [2023-11-17 12:15:51,064 INFO L231 Difference]: Finished difference. Result has 309 places, 1021 transitions, 24037 flow [2023-11-17 12:15:51,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=14080, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24037, PETRI_PLACES=309, PETRI_TRANSITIONS=1021} [2023-11-17 12:15:51,065 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 289 predicate places. [2023-11-17 12:15:51,065 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 1021 transitions, 24037 flow [2023-11-17 12:15:51,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:51,065 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:51,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:51,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-17 12:15:51,266 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:51,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1180664642, now seen corresponding path program 18 times [2023-11-17 12:15:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:51,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559008814] [2023-11-17 12:15:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:51,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:51,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:51,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559008814] [2023-11-17 12:15:51,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559008814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:51,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862919240] [2023-11-17 12:15:51,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:15:51,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:51,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:51,366 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) [2023-11-17 12:15:51,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 12:15:51,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:15:51,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:51,440 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:51,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:51,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:51,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862919240] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:51,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:51,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:15:51,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523766195] [2023-11-17 12:15:51,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:51,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:15:51,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:51,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:15:51,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:15:51,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:51,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 1021 transitions, 24037 flow. Second operand has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:51,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:51,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:51,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:53,247 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-11-17 12:15:53,247 INFO L125 PetriNetUnfolderBase]: For 140833/140833 co-relation queries the response was YES. [2023-11-17 12:15:53,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49239 conditions, 4449 events. 2490/4449 cut-off events. For 140833/140833 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 30292 event pairs, 679 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 48557. Up to 3951 conditions per place. [2023-11-17 12:15:53,291 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 984 selfloop transitions, 141 changer transitions 11/1136 dead transitions. [2023-11-17 12:15:53,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1136 transitions, 28483 flow [2023-11-17 12:15:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:15:53,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:15:53,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 232 transitions. [2023-11-17 12:15:53,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761904761904762 [2023-11-17 12:15:53,293 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 232 transitions. [2023-11-17 12:15:53,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 232 transitions. [2023-11-17 12:15:53,293 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:53,293 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 232 transitions. [2023-11-17 12:15:53,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.733333333333333) internal successors, (232), 30 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 28.0) internal successors, (868), 31 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,295 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 28.0) internal successors, (868), 31 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:53,295 INFO L175 Difference]: Start difference. First operand has 309 places, 1021 transitions, 24037 flow. Second operand 30 states and 232 transitions. [2023-11-17 12:15:53,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1136 transitions, 28483 flow [2023-11-17 12:15:54,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 1136 transitions, 27863 flow, removed 264 selfloop flow, removed 10 redundant places. [2023-11-17 12:15:54,404 INFO L231 Difference]: Finished difference. Result has 345 places, 1077 transitions, 25751 flow [2023-11-17 12:15:54,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=23431, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1021, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=926, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25751, PETRI_PLACES=345, PETRI_TRANSITIONS=1077} [2023-11-17 12:15:54,406 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-11-17 12:15:54,406 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 1077 transitions, 25751 flow [2023-11-17 12:15:54,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:54,406 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:54,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:54,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-17 12:15:54,611 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:54,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:54,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1817309764, now seen corresponding path program 19 times [2023-11-17 12:15:54,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:54,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538226618] [2023-11-17 12:15:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:54,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:54,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538226618] [2023-11-17 12:15:54,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538226618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:54,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833461961] [2023-11-17 12:15:54,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:15:54,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:54,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:54,696 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) [2023-11-17 12:15:54,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 12:15:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:54,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:15:54,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:54,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:15:54,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833461961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:54,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:54,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 12:15:54,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485449965] [2023-11-17 12:15:54,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:54,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:15:54,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:15:54,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:15:54,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:15:54,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 1077 transitions, 25751 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:54,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:54,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:15:54,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:56,480 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-11-17 12:15:56,480 INFO L125 PetriNetUnfolderBase]: For 136359/136359 co-relation queries the response was YES. [2023-11-17 12:15:56,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48481 conditions, 4434 events. 2496/4434 cut-off events. For 136359/136359 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 29978 event pairs, 690 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 47795. Up to 4069 conditions per place. [2023-11-17 12:15:56,542 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 975 selfloop transitions, 135 changer transitions 5/1115 dead transitions. [2023-11-17 12:15:56,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1115 transitions, 28578 flow [2023-11-17 12:15:56,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:15:56,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:15:56,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 118 transitions. [2023-11-17 12:15:56,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26339285714285715 [2023-11-17 12:15:56,544 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 118 transitions. [2023-11-17 12:15:56,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 118 transitions. [2023-11-17 12:15:56,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:56,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 118 transitions. [2023-11-17 12:15:56,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.375) internal successors, (118), 16 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,545 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:56,545 INFO L175 Difference]: Start difference. First operand has 345 places, 1077 transitions, 25751 flow. Second operand 16 states and 118 transitions. [2023-11-17 12:15:56,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1115 transitions, 28578 flow [2023-11-17 12:15:57,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1115 transitions, 27003 flow, removed 764 selfloop flow, removed 6 redundant places. [2023-11-17 12:15:57,925 INFO L231 Difference]: Finished difference. Result has 354 places, 1090 transitions, 24873 flow [2023-11-17 12:15:57,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=24300, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=954, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24873, PETRI_PLACES=354, PETRI_TRANSITIONS=1090} [2023-11-17 12:15:57,926 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 334 predicate places. [2023-11-17 12:15:57,926 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1090 transitions, 24873 flow [2023-11-17 12:15:57,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:57,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:57,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:57,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-17 12:15:58,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-17 12:15:58,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:15:58,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:58,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1666047568, now seen corresponding path program 20 times [2023-11-17 12:15:58,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:58,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836745357] [2023-11-17 12:15:58,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:58,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:58,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836745357] [2023-11-17 12:15:58,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836745357] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:58,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670973411] [2023-11-17 12:15:58,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:58,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:58,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:58,201 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) [2023-11-17 12:15:58,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 12:15:58,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:58,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:58,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-17 12:15:58,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:58,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:58,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:58,319 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:58,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670973411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:58,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:58,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2023-11-17 12:15:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4298455] [2023-11-17 12:15:58,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:58,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 12:15:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 12:15:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-17 12:15:58,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 28 [2023-11-17 12:15:58,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1090 transitions, 24873 flow. Second operand has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:58,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:58,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 28 [2023-11-17 12:15:58,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:00,317 INFO L124 PetriNetUnfolderBase]: 3371/5946 cut-off events. [2023-11-17 12:16:00,317 INFO L125 PetriNetUnfolderBase]: For 153112/153112 co-relation queries the response was YES. [2023-11-17 12:16:00,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61924 conditions, 5946 events. 3371/5946 cut-off events. For 153112/153112 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 42160 event pairs, 139 based on Foata normal form. 7/5953 useless extension candidates. Maximal degree in co-relation 60836. Up to 3556 conditions per place. [2023-11-17 12:16:00,381 INFO L140 encePairwiseOnDemand]: 24/28 looper letters, 1003 selfloop transitions, 448 changer transitions 134/1585 dead transitions. [2023-11-17 12:16:00,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1585 transitions, 38669 flow [2023-11-17 12:16:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:16:00,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:16:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2023-11-17 12:16:00,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5535714285714286 [2023-11-17 12:16:00,382 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 93 transitions. [2023-11-17 12:16:00,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 93 transitions. [2023-11-17 12:16:00,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:00,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 93 transitions. [2023-11-17 12:16:00,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:00,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:00,383 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:00,383 INFO L175 Difference]: Start difference. First operand has 354 places, 1090 transitions, 24873 flow. Second operand 6 states and 93 transitions. [2023-11-17 12:16:00,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1585 transitions, 38669 flow [2023-11-17 12:16:01,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1585 transitions, 38341 flow, removed 70 selfloop flow, removed 9 redundant places. [2023-11-17 12:16:01,982 INFO L231 Difference]: Finished difference. Result has 353 places, 1320 transitions, 30759 flow [2023-11-17 12:16:01,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=24673, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=651, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=30759, PETRI_PLACES=353, PETRI_TRANSITIONS=1320} [2023-11-17 12:16:01,984 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 333 predicate places. [2023-11-17 12:16:01,984 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1320 transitions, 30759 flow [2023-11-17 12:16:01,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.166666666666666) internal successors, (49), 6 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:01,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:01,984 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:01,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:02,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:02,189 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:02,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:02,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1705463021, now seen corresponding path program 21 times [2023-11-17 12:16:02,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:02,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300283811] [2023-11-17 12:16:02,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:02,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300283811] [2023-11-17 12:16:02,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300283811] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:02,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695512563] [2023-11-17 12:16:02,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:16:02,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:02,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:02,313 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) [2023-11-17 12:16:02,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 12:16:02,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:16:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:02,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:02,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:02,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:02,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:02,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695512563] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:02,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:02,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-11-17 12:16:02,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280165580] [2023-11-17 12:16:02,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:02,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:16:02,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:02,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:16:02,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:16:02,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:02,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1320 transitions, 30759 flow. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:02,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:02,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:02,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:05,786 INFO L124 PetriNetUnfolderBase]: 4014/7171 cut-off events. [2023-11-17 12:16:05,786 INFO L125 PetriNetUnfolderBase]: For 201589/201589 co-relation queries the response was YES. [2023-11-17 12:16:05,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79100 conditions, 7171 events. 4014/7171 cut-off events. For 201589/201589 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 52856 event pairs, 139 based on Foata normal form. 16/7187 useless extension candidates. Maximal degree in co-relation 77718. Up to 3288 conditions per place. [2023-11-17 12:16:05,873 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1092 selfloop transitions, 639 changer transitions 33/1764 dead transitions. [2023-11-17 12:16:05,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1764 transitions, 44921 flow [2023-11-17 12:16:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:16:05,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:16:05,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 137 transitions. [2023-11-17 12:16:05,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30580357142857145 [2023-11-17 12:16:05,875 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 137 transitions. [2023-11-17 12:16:05,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 137 transitions. [2023-11-17 12:16:05,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:05,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 137 transitions. [2023-11-17 12:16:05,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.5625) internal successors, (137), 16 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:05,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:05,876 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:05,876 INFO L175 Difference]: Start difference. First operand has 353 places, 1320 transitions, 30759 flow. Second operand 16 states and 137 transitions. [2023-11-17 12:16:05,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1764 transitions, 44921 flow [2023-11-17 12:16:08,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1764 transitions, 44443 flow, removed 239 selfloop flow, removed 0 redundant places. [2023-11-17 12:16:08,243 INFO L231 Difference]: Finished difference. Result has 378 places, 1631 transitions, 41362 flow [2023-11-17 12:16:08,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=30335, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=779, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=41362, PETRI_PLACES=378, PETRI_TRANSITIONS=1631} [2023-11-17 12:16:08,244 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 358 predicate places. [2023-11-17 12:16:08,244 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1631 transitions, 41362 flow [2023-11-17 12:16:08,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:08,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:08,245 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:08,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:08,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:16:08,450 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:08,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:08,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1647859975, now seen corresponding path program 22 times [2023-11-17 12:16:08,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:08,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213074862] [2023-11-17 12:16:08,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:08,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:08,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:08,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213074862] [2023-11-17 12:16:08,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213074862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292346881] [2023-11-17 12:16:08,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:16:08,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:08,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:08,553 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) [2023-11-17 12:16:08,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 12:16:08,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:16:08,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:08,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:08,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:08,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:08,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292346881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:08,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:08,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-17 12:16:08,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579983556] [2023-11-17 12:16:08,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:08,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:16:08,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:08,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:16:08,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:16:08,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:08,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1631 transitions, 41362 flow. Second operand has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:08,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:08,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:08,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:12,834 INFO L124 PetriNetUnfolderBase]: 4415/7816 cut-off events. [2023-11-17 12:16:12,834 INFO L125 PetriNetUnfolderBase]: For 250918/250918 co-relation queries the response was YES. [2023-11-17 12:16:12,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90424 conditions, 7816 events. 4415/7816 cut-off events. For 250918/250918 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 58001 event pairs, 436 based on Foata normal form. 22/7838 useless extension candidates. Maximal degree in co-relation 89133. Up to 3120 conditions per place. [2023-11-17 12:16:13,031 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1083 selfloop transitions, 827 changer transitions 2/1912 dead transitions. [2023-11-17 12:16:13,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1912 transitions, 51479 flow [2023-11-17 12:16:13,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:16:13,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:16:13,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 187 transitions. [2023-11-17 12:16:13,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27827380952380953 [2023-11-17 12:16:13,032 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 187 transitions. [2023-11-17 12:16:13,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 187 transitions. [2023-11-17 12:16:13,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:13,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 187 transitions. [2023-11-17 12:16:13,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.791666666666667) internal successors, (187), 24 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:13,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:13,034 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 28.0) internal successors, (700), 25 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:13,034 INFO L175 Difference]: Start difference. First operand has 378 places, 1631 transitions, 41362 flow. Second operand 24 states and 187 transitions. [2023-11-17 12:16:13,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1912 transitions, 51479 flow [2023-11-17 12:16:15,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 1912 transitions, 51080 flow, removed 178 selfloop flow, removed 4 redundant places. [2023-11-17 12:16:15,921 INFO L231 Difference]: Finished difference. Result has 405 places, 1802 transitions, 48206 flow [2023-11-17 12:16:15,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=41027, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=48206, PETRI_PLACES=405, PETRI_TRANSITIONS=1802} [2023-11-17 12:16:15,923 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2023-11-17 12:16:15,923 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1802 transitions, 48206 flow [2023-11-17 12:16:15,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.631578947368421) internal successors, (88), 19 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:15,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:15,923 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:15,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 12:16:16,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:16:16,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:16,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:16,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1484048653, now seen corresponding path program 23 times [2023-11-17 12:16:16,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:16,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995355909] [2023-11-17 12:16:16,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:16,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:16,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:16,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995355909] [2023-11-17 12:16:16,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995355909] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:16,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950628668] [2023-11-17 12:16:16,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:16:16,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:16,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:16,223 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) [2023-11-17 12:16:16,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 12:16:16,480 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:16:16,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:16,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:16,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:16,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:16,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:16,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950628668] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:16,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:16,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 12:16:16,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560928976] [2023-11-17 12:16:16,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:16,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:16:16,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:16:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:16:16,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:16,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1802 transitions, 48206 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:16,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:16,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:16,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:21,571 INFO L124 PetriNetUnfolderBase]: 4777/8458 cut-off events. [2023-11-17 12:16:21,571 INFO L125 PetriNetUnfolderBase]: For 319652/319652 co-relation queries the response was YES. [2023-11-17 12:16:21,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101730 conditions, 8458 events. 4777/8458 cut-off events. For 319652/319652 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 63395 event pairs, 264 based on Foata normal form. 60/8518 useless extension candidates. Maximal degree in co-relation 100365. Up to 3080 conditions per place. [2023-11-17 12:16:21,690 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 431 selfloop transitions, 1624 changer transitions 32/2087 dead transitions. [2023-11-17 12:16:21,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 2087 transitions, 59293 flow [2023-11-17 12:16:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 12:16:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 12:16:21,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 274 transitions. [2023-11-17 12:16:21,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2644787644787645 [2023-11-17 12:16:21,692 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 274 transitions. [2023-11-17 12:16:21,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 274 transitions. [2023-11-17 12:16:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 274 transitions. [2023-11-17 12:16:21,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 7.405405405405405) internal successors, (274), 37 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:21,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:21,695 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 28.0) internal successors, (1064), 38 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:21,695 INFO L175 Difference]: Start difference. First operand has 405 places, 1802 transitions, 48206 flow. Second operand 37 states and 274 transitions. [2023-11-17 12:16:21,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 2087 transitions, 59293 flow [2023-11-17 12:16:25,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 2087 transitions, 58386 flow, removed 417 selfloop flow, removed 5 redundant places. [2023-11-17 12:16:25,221 INFO L231 Difference]: Finished difference. Result has 439 places, 1988 transitions, 56819 flow [2023-11-17 12:16:25,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=47487, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1802, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1454, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=56819, PETRI_PLACES=439, PETRI_TRANSITIONS=1988} [2023-11-17 12:16:25,223 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 419 predicate places. [2023-11-17 12:16:25,223 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1988 transitions, 56819 flow [2023-11-17 12:16:25,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:25,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:25,224 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:25,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:16:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:25,430 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:25,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash -189696603, now seen corresponding path program 24 times [2023-11-17 12:16:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:25,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404789998] [2023-11-17 12:16:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:25,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:25,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:25,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:25,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404789998] [2023-11-17 12:16:25,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404789998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:25,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003222890] [2023-11-17 12:16:25,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:16:25,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:25,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:25,532 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) [2023-11-17 12:16:25,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 12:16:25,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-17 12:16:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:25,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:25,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:25,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:25,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:25,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003222890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:25,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:25,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 12:16:25,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825332258] [2023-11-17 12:16:25,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:25,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:16:25,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:25,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:16:25,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:16:25,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:25,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1988 transitions, 56819 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:25,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:25,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:25,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:30,818 INFO L124 PetriNetUnfolderBase]: 4726/8341 cut-off events. [2023-11-17 12:16:30,818 INFO L125 PetriNetUnfolderBase]: For 331501/331501 co-relation queries the response was YES. [2023-11-17 12:16:30,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105236 conditions, 8341 events. 4726/8341 cut-off events. For 331501/331501 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 62696 event pairs, 794 based on Foata normal form. 12/8353 useless extension candidates. Maximal degree in co-relation 103783. Up to 4882 conditions per place. [2023-11-17 12:16:30,936 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 761 selfloop transitions, 1280 changer transitions 2/2043 dead transitions. [2023-11-17 12:16:30,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2043 transitions, 61381 flow [2023-11-17 12:16:30,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:16:30,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:16:30,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 202 transitions. [2023-11-17 12:16:30,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2576530612244898 [2023-11-17 12:16:30,937 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 202 transitions. [2023-11-17 12:16:30,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 202 transitions. [2023-11-17 12:16:30,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:30,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 202 transitions. [2023-11-17 12:16:30,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.214285714285714) internal successors, (202), 28 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:30,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 28.0) internal successors, (812), 29 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:30,939 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 28.0) internal successors, (812), 29 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:30,939 INFO L175 Difference]: Start difference. First operand has 439 places, 1988 transitions, 56819 flow. Second operand 28 states and 202 transitions. [2023-11-17 12:16:30,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2043 transitions, 61381 flow [2023-11-17 12:16:35,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 2043 transitions, 57274 flow, removed 1227 selfloop flow, removed 21 redundant places. [2023-11-17 12:16:35,091 INFO L231 Difference]: Finished difference. Result has 447 places, 1988 transitions, 55333 flow [2023-11-17 12:16:35,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52714, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=55333, PETRI_PLACES=447, PETRI_TRANSITIONS=1988} [2023-11-17 12:16:35,093 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 427 predicate places. [2023-11-17 12:16:35,094 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1988 transitions, 55333 flow [2023-11-17 12:16:35,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:35,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:35,094 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:35,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-17 12:16:35,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:35,295 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:35,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:35,295 INFO L85 PathProgramCache]: Analyzing trace with hash -355712859, now seen corresponding path program 25 times [2023-11-17 12:16:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:35,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940776519] [2023-11-17 12:16:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:35,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:35,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940776519] [2023-11-17 12:16:35,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940776519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:35,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942310070] [2023-11-17 12:16:35,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:16:35,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:35,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:35,388 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) [2023-11-17 12:16:35,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 12:16:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:35,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:35,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:35,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:35,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942310070] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:35,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:35,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 12:16:35,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790292166] [2023-11-17 12:16:35,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:35,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:16:35,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:16:35,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:16:35,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1988 transitions, 55333 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:35,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:35,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:35,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:41,188 INFO L124 PetriNetUnfolderBase]: 5083/8984 cut-off events. [2023-11-17 12:16:41,188 INFO L125 PetriNetUnfolderBase]: For 285556/285556 co-relation queries the response was YES. [2023-11-17 12:16:41,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108982 conditions, 8984 events. 5083/8984 cut-off events. For 285556/285556 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 67748 event pairs, 323 based on Foata normal form. 22/9006 useless extension candidates. Maximal degree in co-relation 107793. Up to 2551 conditions per place. [2023-11-17 12:16:41,320 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 980 selfloop transitions, 1227 changer transitions 25/2232 dead transitions. [2023-11-17 12:16:41,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 2232 transitions, 64970 flow [2023-11-17 12:16:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 12:16:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 12:16:41,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 226 transitions. [2023-11-17 12:16:41,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26904761904761904 [2023-11-17 12:16:41,322 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 226 transitions. [2023-11-17 12:16:41,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 226 transitions. [2023-11-17 12:16:41,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:41,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 226 transitions. [2023-11-17 12:16:41,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 7.533333333333333) internal successors, (226), 30 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:41,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 28.0) internal successors, (868), 31 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:41,324 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 28.0) internal successors, (868), 31 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:41,324 INFO L175 Difference]: Start difference. First operand has 447 places, 1988 transitions, 55333 flow. Second operand 30 states and 226 transitions. [2023-11-17 12:16:41,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 2232 transitions, 64970 flow [2023-11-17 12:16:45,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 2232 transitions, 62624 flow, removed 36 selfloop flow, removed 21 redundant places. [2023-11-17 12:16:45,323 INFO L231 Difference]: Finished difference. Result has 463 places, 2104 transitions, 60103 flow [2023-11-17 12:16:45,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=53204, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1988, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1096, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=803, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=60103, PETRI_PLACES=463, PETRI_TRANSITIONS=2104} [2023-11-17 12:16:45,324 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 443 predicate places. [2023-11-17 12:16:45,325 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 2104 transitions, 60103 flow [2023-11-17 12:16:45,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:45,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:45,325 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:45,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 12:16:45,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:45,526 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:45,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:45,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1547107477, now seen corresponding path program 26 times [2023-11-17 12:16:45,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:45,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671912981] [2023-11-17 12:16:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:45,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:45,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:45,615 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:45,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671912981] [2023-11-17 12:16:45,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671912981] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:45,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517741376] [2023-11-17 12:16:45,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:16:45,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:45,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:45,621 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) [2023-11-17 12:16:45,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 12:16:45,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:16:45,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:45,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:45,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:45,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:45,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:45,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:45,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517741376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:45,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:45,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2023-11-17 12:16:45,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809139823] [2023-11-17 12:16:45,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:45,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:16:45,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:45,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:16:45,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:16:45,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:45,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 2104 transitions, 60103 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:45,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:45,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:45,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:51,927 INFO L124 PetriNetUnfolderBase]: 5412/9553 cut-off events. [2023-11-17 12:16:51,928 INFO L125 PetriNetUnfolderBase]: For 327282/327282 co-relation queries the response was YES. [2023-11-17 12:16:52,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117791 conditions, 9553 events. 5412/9553 cut-off events. For 327282/327282 co-relation queries the response was YES. Maximal size of possible extension queue 683. Compared 72716 event pairs, 245 based on Foata normal form. 52/9605 useless extension candidates. Maximal degree in co-relation 116625. Up to 2781 conditions per place. [2023-11-17 12:16:52,067 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 718 selfloop transitions, 1623 changer transitions 15/2356 dead transitions. [2023-11-17 12:16:52,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 2356 transitions, 69896 flow [2023-11-17 12:16:52,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 12:16:52,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 12:16:52,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 259 transitions. [2023-11-17 12:16:52,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2642857142857143 [2023-11-17 12:16:52,068 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 259 transitions. [2023-11-17 12:16:52,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 259 transitions. [2023-11-17 12:16:52,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:52,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 259 transitions. [2023-11-17 12:16:52,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 7.4) internal successors, (259), 35 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:52,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 28.0) internal successors, (1008), 36 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) [2023-11-17 12:16:52,071 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 28.0) internal successors, (1008), 36 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) [2023-11-17 12:16:52,071 INFO L175 Difference]: Start difference. First operand has 463 places, 2104 transitions, 60103 flow. Second operand 35 states and 259 transitions. [2023-11-17 12:16:52,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 2356 transitions, 69896 flow [2023-11-17 12:16:57,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 2356 transitions, 68746 flow, removed 430 selfloop flow, removed 12 redundant places. [2023-11-17 12:16:57,429 INFO L231 Difference]: Finished difference. Result has 495 places, 2258 transitions, 68260 flow [2023-11-17 12:16:57,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=59015, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1468, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=68260, PETRI_PLACES=495, PETRI_TRANSITIONS=2258} [2023-11-17 12:16:57,431 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 475 predicate places. [2023-11-17 12:16:57,432 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 2258 transitions, 68260 flow [2023-11-17 12:16:57,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:57,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:16:57,432 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:16:57,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-17 12:16:57,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:57,632 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:16:57,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:16:57,633 INFO L85 PathProgramCache]: Analyzing trace with hash -457520789, now seen corresponding path program 27 times [2023-11-17 12:16:57,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:16:57,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980829255] [2023-11-17 12:16:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:16:57,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:16:57,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:16:57,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:57,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:16:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980829255] [2023-11-17 12:16:57,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980829255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:16:57,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861132060] [2023-11-17 12:16:57,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:16:57,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:16:57,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:16:57,730 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) [2023-11-17 12:16:57,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 12:16:57,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:16:57,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:16:57,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:16:57,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:16:57,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:57,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:16:57,945 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:16:57,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861132060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:16:57,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:16:57,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-11-17 12:16:57,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342771570] [2023-11-17 12:16:57,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:16:57,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:16:57,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:16:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:16:57,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:16:57,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:16:57,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 2258 transitions, 68260 flow. Second operand has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:57,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:16:57,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:16:57,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:04,820 INFO L124 PetriNetUnfolderBase]: 6009/10640 cut-off events. [2023-11-17 12:17:04,820 INFO L125 PetriNetUnfolderBase]: For 404946/404946 co-relation queries the response was YES. [2023-11-17 12:17:04,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137874 conditions, 10640 events. 6009/10640 cut-off events. For 404946/404946 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 83063 event pairs, 467 based on Foata normal form. 12/10652 useless extension candidates. Maximal degree in co-relation 136577. Up to 3469 conditions per place. [2023-11-17 12:17:04,968 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1303 selfloop transitions, 1341 changer transitions 0/2644 dead transitions. [2023-11-17 12:17:04,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 2644 transitions, 83765 flow [2023-11-17 12:17:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-17 12:17:04,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-11-17 12:17:04,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 310 transitions. [2023-11-17 12:17:04,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26360544217687076 [2023-11-17 12:17:04,969 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 310 transitions. [2023-11-17 12:17:04,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 310 transitions. [2023-11-17 12:17:04,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:04,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 310 transitions. [2023-11-17 12:17:04,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 7.380952380952381) internal successors, (310), 42 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:04,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 28.0) internal successors, (1204), 43 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:04,971 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 28.0) internal successors, (1204), 43 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:04,971 INFO L175 Difference]: Start difference. First operand has 495 places, 2258 transitions, 68260 flow. Second operand 42 states and 310 transitions. [2023-11-17 12:17:04,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 2644 transitions, 83765 flow [2023-11-17 12:17:11,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 2644 transitions, 82732 flow, removed 256 selfloop flow, removed 17 redundant places. [2023-11-17 12:17:11,871 INFO L231 Difference]: Finished difference. Result has 525 places, 2505 transitions, 79066 flow [2023-11-17 12:17:11,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=67380, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=79066, PETRI_PLACES=525, PETRI_TRANSITIONS=2505} [2023-11-17 12:17:11,873 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 505 predicate places. [2023-11-17 12:17:11,873 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 2505 transitions, 79066 flow [2023-11-17 12:17:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.761904761904762) internal successors, (100), 21 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:11,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:11,874 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:11,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-17 12:17:12,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-11-17 12:17:12,074 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:12,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1104813209, now seen corresponding path program 28 times [2023-11-17 12:17:12,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:12,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594053997] [2023-11-17 12:17:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:12,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:12,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594053997] [2023-11-17 12:17:12,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594053997] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:12,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728672336] [2023-11-17 12:17:12,165 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:17:12,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:12,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:12,169 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) [2023-11-17 12:17:12,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 12:17:12,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:17:12,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:12,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:17:12,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:12,334 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728672336] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:12,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:12,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 18 [2023-11-17 12:17:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653181458] [2023-11-17 12:17:12,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:12,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:17:12,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:17:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:17:12,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:17:12,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 2505 transitions, 79066 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:12,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:12,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:17:12,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:20,973 INFO L124 PetriNetUnfolderBase]: 6471/11486 cut-off events. [2023-11-17 12:17:20,973 INFO L125 PetriNetUnfolderBase]: For 463386/463386 co-relation queries the response was YES. [2023-11-17 12:17:21,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152858 conditions, 11486 events. 6471/11486 cut-off events. For 463386/463386 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 90783 event pairs, 303 based on Foata normal form. 26/11512 useless extension candidates. Maximal degree in co-relation 151539. Up to 2881 conditions per place. [2023-11-17 12:17:21,235 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 961 selfloop transitions, 1834 changer transitions 16/2811 dead transitions. [2023-11-17 12:17:21,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 2811 transitions, 92636 flow [2023-11-17 12:17:21,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 12:17:21,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 12:17:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 253 transitions. [2023-11-17 12:17:21,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2657563025210084 [2023-11-17 12:17:21,236 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 253 transitions. [2023-11-17 12:17:21,236 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 253 transitions. [2023-11-17 12:17:21,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:21,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 253 transitions. [2023-11-17 12:17:21,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 7.4411764705882355) internal successors, (253), 34 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:21,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 28.0) internal successors, (980), 35 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:21,238 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 28.0) internal successors, (980), 35 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:21,238 INFO L175 Difference]: Start difference. First operand has 525 places, 2505 transitions, 79066 flow. Second operand 34 states and 253 transitions. [2023-11-17 12:17:21,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 2811 transitions, 92636 flow [2023-11-17 12:17:29,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 550 places, 2811 transitions, 91630 flow, removed 436 selfloop flow, removed 8 redundant places. [2023-11-17 12:17:29,439 INFO L231 Difference]: Finished difference. Result has 561 places, 2688 transitions, 89632 flow [2023-11-17 12:17:29,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=78118, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1656, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=786, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=89632, PETRI_PLACES=561, PETRI_TRANSITIONS=2688} [2023-11-17 12:17:29,441 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 541 predicate places. [2023-11-17 12:17:29,441 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 2688 transitions, 89632 flow [2023-11-17 12:17:29,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:29,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:29,441 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:29,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-17 12:17:29,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:29,642 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:29,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:29,642 INFO L85 PathProgramCache]: Analyzing trace with hash 398321615, now seen corresponding path program 29 times [2023-11-17 12:17:29,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:29,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268913394] [2023-11-17 12:17:29,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:29,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:29,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:29,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268913394] [2023-11-17 12:17:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268913394] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:29,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217749626] [2023-11-17 12:17:29,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:17:29,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:29,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:29,765 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) [2023-11-17 12:17:29,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 12:17:29,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 12:17:29,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:29,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:17:29,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:29,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:30,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217749626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:30,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:30,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2023-11-17 12:17:30,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108555441] [2023-11-17 12:17:30,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:30,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:17:30,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:30,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:17:30,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:17:30,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:17:30,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 2688 transitions, 89632 flow. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:30,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:30,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:17:30,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:17:40,034 INFO L124 PetriNetUnfolderBase]: 6771/12066 cut-off events. [2023-11-17 12:17:40,034 INFO L125 PetriNetUnfolderBase]: For 533116/533116 co-relation queries the response was YES. [2023-11-17 12:17:40,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166276 conditions, 12066 events. 6771/12066 cut-off events. For 533116/533116 co-relation queries the response was YES. Maximal size of possible extension queue 863. Compared 96384 event pairs, 174 based on Foata normal form. 60/12126 useless extension candidates. Maximal degree in co-relation 165021. Up to 2971 conditions per place. [2023-11-17 12:17:40,213 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 475 selfloop transitions, 2418 changer transitions 19/2912 dead transitions. [2023-11-17 12:17:40,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 2912 transitions, 100607 flow [2023-11-17 12:17:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 12:17:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 12:17:40,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 235 transitions. [2023-11-17 12:17:40,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2622767857142857 [2023-11-17 12:17:40,214 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 235 transitions. [2023-11-17 12:17:40,214 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 235 transitions. [2023-11-17 12:17:40,214 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:17:40,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 235 transitions. [2023-11-17 12:17:40,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 7.34375) internal successors, (235), 32 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:40,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 28.0) internal successors, (924), 33 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:40,216 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 28.0) internal successors, (924), 33 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:40,216 INFO L175 Difference]: Start difference. First operand has 561 places, 2688 transitions, 89632 flow. Second operand 32 states and 235 transitions. [2023-11-17 12:17:40,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 2912 transitions, 100607 flow [2023-11-17 12:17:51,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 579 places, 2912 transitions, 99030 flow, removed 435 selfloop flow, removed 12 redundant places. [2023-11-17 12:17:51,138 INFO L231 Difference]: Finished difference. Result has 585 places, 2819 transitions, 99291 flow [2023-11-17 12:17:51,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=87983, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=99291, PETRI_PLACES=585, PETRI_TRANSITIONS=2819} [2023-11-17 12:17:51,142 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 565 predicate places. [2023-11-17 12:17:51,142 INFO L495 AbstractCegarLoop]: Abstraction has has 585 places, 2819 transitions, 99291 flow [2023-11-17 12:17:51,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:51,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:51,142 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:51,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 12:17:51,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:51,347 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:17:51,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2020809015, now seen corresponding path program 30 times [2023-11-17 12:17:51,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:51,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049356336] [2023-11-17 12:17:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:51,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:51,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049356336] [2023-11-17 12:17:51,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049356336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:51,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727061063] [2023-11-17 12:17:51,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:17:51,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:51,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:51,445 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) [2023-11-17 12:17:51,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:17:51,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:17:51,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:51,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:17:51,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:51,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:17:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727061063] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:51,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:51,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 19 [2023-11-17 12:17:51,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788883124] [2023-11-17 12:17:51,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:17:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:17:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:17:51,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:17:51,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 585 places, 2819 transitions, 99291 flow. Second operand has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:51,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:51,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:17:51,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:06,928 INFO L124 PetriNetUnfolderBase]: 8611/15270 cut-off events. [2023-11-17 12:18:06,929 INFO L125 PetriNetUnfolderBase]: For 748022/748022 co-relation queries the response was YES. [2023-11-17 12:18:07,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220599 conditions, 15270 events. 8611/15270 cut-off events. For 748022/748022 co-relation queries the response was YES. Maximal size of possible extension queue 1125. Compared 125840 event pairs, 243 based on Foata normal form. 82/15352 useless extension candidates. Maximal degree in co-relation 219209. Up to 3955 conditions per place. [2023-11-17 12:18:07,207 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 604 selfloop transitions, 3084 changer transitions 41/3729 dead transitions. [2023-11-17 12:18:07,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 3729 transitions, 135920 flow [2023-11-17 12:18:07,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 12:18:07,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 12:18:07,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 294 transitions. [2023-11-17 12:18:07,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2625 [2023-11-17 12:18:07,208 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 294 transitions. [2023-11-17 12:18:07,208 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 294 transitions. [2023-11-17 12:18:07,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:07,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 294 transitions. [2023-11-17 12:18:07,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 7.35) internal successors, (294), 40 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:07,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 28.0) internal successors, (1148), 41 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:07,210 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 28.0) internal successors, (1148), 41 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:07,211 INFO L175 Difference]: Start difference. First operand has 585 places, 2819 transitions, 99291 flow. Second operand 40 states and 294 transitions. [2023-11-17 12:18:07,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 3729 transitions, 135920 flow [2023-11-17 12:18:26,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 3729 transitions, 133582 flow, removed 665 selfloop flow, removed 17 redundant places. [2023-11-17 12:18:26,805 INFO L231 Difference]: Finished difference. Result has 619 places, 3614 transitions, 134069 flow [2023-11-17 12:18:26,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=97527, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2818, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=134069, PETRI_PLACES=619, PETRI_TRANSITIONS=3614} [2023-11-17 12:18:26,808 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 599 predicate places. [2023-11-17 12:18:26,808 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 3614 transitions, 134069 flow [2023-11-17 12:18:26,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.894736842105263) internal successors, (93), 19 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:26,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:18:26,808 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:18:26,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-17 12:18:27,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 12:18:27,009 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:18:27,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:18:27,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1375828761, now seen corresponding path program 31 times [2023-11-17 12:18:27,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:18:27,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256809131] [2023-11-17 12:18:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:18:27,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:18:27,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:27,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:18:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256809131] [2023-11-17 12:18:27,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256809131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:18:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970311085] [2023-11-17 12:18:27,111 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:18:27,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:18:27,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:18:27,113 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) [2023-11-17 12:18:27,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:18:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:18:27,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:18:27,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:18:27,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:27,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:18:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:18:27,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970311085] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:18:27,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:18:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-11-17 12:18:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515305839] [2023-11-17 12:18:27,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:18:27,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 12:18:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:18:27,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 12:18:27,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2023-11-17 12:18:27,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:18:27,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 3614 transitions, 134069 flow. Second operand has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:27,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:18:27,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:18:27,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:18:51,893 INFO L124 PetriNetUnfolderBase]: 9154/16303 cut-off events. [2023-11-17 12:18:51,893 INFO L125 PetriNetUnfolderBase]: For 896153/896153 co-relation queries the response was YES. [2023-11-17 12:18:52,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248959 conditions, 16303 events. 9154/16303 cut-off events. For 896153/896153 co-relation queries the response was YES. Maximal size of possible extension queue 1205. Compared 137448 event pairs, 735 based on Foata normal form. 18/16321 useless extension candidates. Maximal degree in co-relation 247535. Up to 5057 conditions per place. [2023-11-17 12:18:52,203 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1728 selfloop transitions, 2239 changer transitions 16/3983 dead transitions. [2023-11-17 12:18:52,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 662 places, 3983 transitions, 154116 flow [2023-11-17 12:18:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-17 12:18:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-11-17 12:18:52,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 322 transitions. [2023-11-17 12:18:52,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26136363636363635 [2023-11-17 12:18:52,204 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 322 transitions. [2023-11-17 12:18:52,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 322 transitions. [2023-11-17 12:18:52,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:18:52,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 322 transitions. [2023-11-17 12:18:52,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 7.318181818181818) internal successors, (322), 44 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:52,206 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 28.0) internal successors, (1260), 45 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:52,206 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 28.0) internal successors, (1260), 45 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:18:52,206 INFO L175 Difference]: Start difference. First operand has 619 places, 3614 transitions, 134069 flow. Second operand 44 states and 322 transitions. [2023-11-17 12:18:52,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 662 places, 3983 transitions, 154116 flow [2023-11-17 12:19:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 649 places, 3983 transitions, 151769 flow, removed 894 selfloop flow, removed 13 redundant places. [2023-11-17 12:19:18,766 INFO L231 Difference]: Finished difference. Result has 657 places, 3873 transitions, 147998 flow [2023-11-17 12:19:18,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=131921, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1969, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=147998, PETRI_PLACES=657, PETRI_TRANSITIONS=3873} [2023-11-17 12:19:18,769 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 637 predicate places. [2023-11-17 12:19:18,769 INFO L495 AbstractCegarLoop]: Abstraction has has 657 places, 3873 transitions, 147998 flow [2023-11-17 12:19:18,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.739130434782608) internal successors, (109), 23 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:18,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:19:18,770 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:19:18,774 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-17 12:19:18,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 12:19:18,970 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:19:18,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:19:18,971 INFO L85 PathProgramCache]: Analyzing trace with hash -764547843, now seen corresponding path program 32 times [2023-11-17 12:19:18,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:19:18,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774704536] [2023-11-17 12:19:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:19:18,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:19:18,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:19:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:19,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:19:19,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774704536] [2023-11-17 12:19:19,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774704536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:19:19,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844715451] [2023-11-17 12:19:19,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:19:19,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:19:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:19:19,073 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) [2023-11-17 12:19:19,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:19:19,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:19:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:19:19,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:19:19,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:19:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:19,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:19:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:19:19,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844715451] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:19:19,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:19:19,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-11-17 12:19:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120700192] [2023-11-17 12:19:19,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:19:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:19:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:19:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:19:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:19:19,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:19:19,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 657 places, 3873 transitions, 147998 flow. Second operand has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:19,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:19:19,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:19:19,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:19:53,255 INFO L124 PetriNetUnfolderBase]: 12707/22676 cut-off events. [2023-11-17 12:19:53,256 INFO L125 PetriNetUnfolderBase]: For 1366302/1366302 co-relation queries the response was YES. [2023-11-17 12:19:53,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 357338 conditions, 22676 events. 12707/22676 cut-off events. For 1366302/1366302 co-relation queries the response was YES. Maximal size of possible extension queue 1574. Compared 200294 event pairs, 744 based on Foata normal form. 50/22726 useless extension candidates. Maximal degree in co-relation 355877. Up to 5881 conditions per place. [2023-11-17 12:19:54,247 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 1493 selfloop transitions, 3974 changer transitions 53/5520 dead transitions. [2023-11-17 12:19:54,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 708 places, 5520 transitions, 225368 flow [2023-11-17 12:19:54,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-17 12:19:54,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-11-17 12:19:54,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 379 transitions. [2023-11-17 12:19:54,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2603021978021978 [2023-11-17 12:19:54,249 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 379 transitions. [2023-11-17 12:19:54,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 379 transitions. [2023-11-17 12:19:54,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:19:54,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 379 transitions. [2023-11-17 12:19:54,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 7.288461538461538) internal successors, (379), 52 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:54,252 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 28.0) internal successors, (1484), 53 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:54,252 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 28.0) internal successors, (1484), 53 states have internal predecessors, (1484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:19:54,252 INFO L175 Difference]: Start difference. First operand has 657 places, 3873 transitions, 147998 flow. Second operand 52 states and 379 transitions. [2023-11-17 12:19:54,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 708 places, 5520 transitions, 225368 flow [2023-11-17 12:20:47,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 702 places, 5520 transitions, 223651 flow, removed 797 selfloop flow, removed 6 redundant places. [2023-11-17 12:20:47,975 INFO L231 Difference]: Finished difference. Result has 715 places, 5372 transitions, 223019 flow [2023-11-17 12:20:47,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=147103, PETRI_DIFFERENCE_MINUEND_PLACES=651, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=223019, PETRI_PLACES=715, PETRI_TRANSITIONS=5372} [2023-11-17 12:20:47,978 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 695 predicate places. [2023-11-17 12:20:47,978 INFO L495 AbstractCegarLoop]: Abstraction has has 715 places, 5372 transitions, 223019 flow [2023-11-17 12:20:47,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.72) internal successors, (118), 25 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:47,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:20:47,979 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:20:47,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 12:20:48,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:20:48,180 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:20:48,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:20:48,181 INFO L85 PathProgramCache]: Analyzing trace with hash 739695779, now seen corresponding path program 33 times [2023-11-17 12:20:48,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:20:48,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081878467] [2023-11-17 12:20:48,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:20:48,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:20:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:20:48,273 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:48,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:20:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081878467] [2023-11-17 12:20:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081878467] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:20:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806519231] [2023-11-17 12:20:48,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:20:48,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:20:48,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:20:48,276 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) [2023-11-17 12:20:48,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:20:48,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:20:48,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:20:48,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:20:48,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:20:48,437 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:48,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:20:48,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:20:48,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806519231] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:20:48,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:20:48,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2023-11-17 12:20:48,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859608379] [2023-11-17 12:20:48,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:20:48,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 12:20:48,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:20:48,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 12:20:48,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-11-17 12:20:48,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:20:48,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 715 places, 5372 transitions, 223019 flow. Second operand has 25 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:20:48,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:20:48,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:20:48,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:21:37,748 INFO L124 PetriNetUnfolderBase]: 12776/22745 cut-off events. [2023-11-17 12:21:37,749 INFO L125 PetriNetUnfolderBase]: For 1453229/1453229 co-relation queries the response was YES. [2023-11-17 12:21:38,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374984 conditions, 22745 events. 12776/22745 cut-off events. For 1453229/1453229 co-relation queries the response was YES. Maximal size of possible extension queue 1573. Compared 198908 event pairs, 3925 based on Foata normal form. 80/22825 useless extension candidates. Maximal degree in co-relation 373191. Up to 21573 conditions per place. [2023-11-17 12:21:38,759 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 5220 selfloop transitions, 320 changer transitions 31/5571 dead transitions. [2023-11-17 12:21:38,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 759 places, 5571 transitions, 239144 flow [2023-11-17 12:21:38,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-17 12:21:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-11-17 12:21:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 341 transitions. [2023-11-17 12:21:38,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2706349206349206 [2023-11-17 12:21:38,760 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 341 transitions. [2023-11-17 12:21:38,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 341 transitions. [2023-11-17 12:21:38,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:21:38,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 341 transitions. [2023-11-17 12:21:38,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 7.5777777777777775) internal successors, (341), 45 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:38,762 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 28.0) internal successors, (1288), 46 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:38,762 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 28.0) internal successors, (1288), 46 states have internal predecessors, (1288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:21:38,762 INFO L175 Difference]: Start difference. First operand has 715 places, 5372 transitions, 223019 flow. Second operand 45 states and 341 transitions. [2023-11-17 12:21:38,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 759 places, 5571 transitions, 239144 flow [2023-11-17 12:22:50,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 745 places, 5571 transitions, 237664 flow, removed 553 selfloop flow, removed 14 redundant places. [2023-11-17 12:22:50,390 INFO L231 Difference]: Finished difference. Result has 766 places, 5464 transitions, 226168 flow [2023-11-17 12:22:50,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=221547, PETRI_DIFFERENCE_MINUEND_PLACES=701, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=5142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=226168, PETRI_PLACES=766, PETRI_TRANSITIONS=5464} [2023-11-17 12:22:50,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 746 predicate places. [2023-11-17 12:22:50,394 INFO L495 AbstractCegarLoop]: Abstraction has has 766 places, 5464 transitions, 226168 flow [2023-11-17 12:22:50,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 4.48) internal successors, (112), 25 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:50,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:22:50,395 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:22:50,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-11-17 12:22:50,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:22:50,596 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:22:50,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:22:50,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1902632285, now seen corresponding path program 34 times [2023-11-17 12:22:50,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:22:50,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950366610] [2023-11-17 12:22:50,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:22:50,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:22:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:22:50,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:50,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:22:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950366610] [2023-11-17 12:22:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950366610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:22:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925553673] [2023-11-17 12:22:50,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:22:50,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:22:50,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:22:50,693 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:22:50,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:22:50,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:22:50,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:22:50,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 12:22:50,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:22:50,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:50,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:22:50,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:22:50,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925553673] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:22:50,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:22:50,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 21 [2023-11-17 12:22:50,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943738723] [2023-11-17 12:22:50,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:22:50,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 12:22:50,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:22:50,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 12:22:50,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2023-11-17 12:22:50,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 28 [2023-11-17 12:22:50,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 766 places, 5464 transitions, 226168 flow. Second operand has 21 states, 21 states have (on average 4.714285714285714) internal successors, (99), 21 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:22:50,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:22:50,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 28 [2023-11-17 12:22:50,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:23:44,231 INFO L124 PetriNetUnfolderBase]: 12785/22719 cut-off events. [2023-11-17 12:23:44,231 INFO L125 PetriNetUnfolderBase]: For 1368488/1368488 co-relation queries the response was YES. [2023-11-17 12:23:45,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 372108 conditions, 22719 events. 12785/22719 cut-off events. For 1368488/1368488 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 198293 event pairs, 3958 based on Foata normal form. 6/22725 useless extension candidates. Maximal degree in co-relation 371017. Up to 21913 conditions per place. [2023-11-17 12:23:45,190 INFO L140 encePairwiseOnDemand]: 22/28 looper letters, 5216 selfloop transitions, 311 changer transitions 6/5533 dead transitions. [2023-11-17 12:23:45,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 5533 transitions, 238765 flow [2023-11-17 12:23:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:23:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:23:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 159 transitions. [2023-11-17 12:23:45,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25811688311688313 [2023-11-17 12:23:45,191 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 159 transitions. [2023-11-17 12:23:45,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 159 transitions. [2023-11-17 12:23:45,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:23:45,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 159 transitions. [2023-11-17 12:23:45,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.2272727272727275) internal successors, (159), 22 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:45,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 28.0) internal successors, (644), 23 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:45,192 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 28.0) internal successors, (644), 23 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:23:45,192 INFO L175 Difference]: Start difference. First operand has 766 places, 5464 transitions, 226168 flow. Second operand 22 states and 159 transitions. [2023-11-17 12:23:45,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 5533 transitions, 238765 flow Received shutdown request... [2023-11-17 12:24:25,322 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:24:25,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 12:24:25,335 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 [2023-11-17 12:24:25,335 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:24:25,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:24:25,523 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 12:24:25,524 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:24:25,524 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:24:25,524 INFO L445 BasicCegarLoop]: Path program histogram: [34, 6, 1] [2023-11-17 12:24:25,527 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:24:25,527 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:24:25,529 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:24:25 BasicIcfg [2023-11-17 12:24:25,529 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:24:25,530 INFO L158 Benchmark]: Toolchain (without parser) took 537083.46ms. Allocated memory was 232.8MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 179.1MB in the beginning and 2.3GB in the end (delta: -2.1GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2023-11-17 12:24:25,530 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 189.8MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:24:25,530 INFO L158 Benchmark]: CACSL2BoogieTranslator took 199.49ms. Allocated memory is still 232.8MB. Free memory was 178.6MB in the beginning and 167.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-11-17 12:24:25,530 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.28ms. Allocated memory is still 232.8MB. Free memory was 167.5MB in the beginning and 166.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:24:25,531 INFO L158 Benchmark]: Boogie Preprocessor took 28.17ms. Allocated memory is still 232.8MB. Free memory was 166.0MB in the beginning and 164.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 12:24:25,531 INFO L158 Benchmark]: RCFGBuilder took 474.74ms. Allocated memory is still 232.8MB. Free memory was 164.9MB in the beginning and 142.4MB in the end (delta: 22.5MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 12:24:25,531 INFO L158 Benchmark]: TraceAbstraction took 536343.30ms. Allocated memory was 232.8MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 141.9MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. [2023-11-17 12:24:25,532 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 189.8MB. Free memory is still 136.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 199.49ms. Allocated memory is still 232.8MB. Free memory was 178.6MB in the beginning and 167.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 31.28ms. Allocated memory is still 232.8MB. Free memory was 167.5MB in the beginning and 166.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.17ms. Allocated memory is still 232.8MB. Free memory was 166.0MB in the beginning and 164.9MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 474.74ms. Allocated memory is still 232.8MB. Free memory was 164.9MB in the beginning and 142.4MB in the end (delta: 22.5MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 536343.30ms. Allocated memory was 232.8MB in the beginning and 4.3GB in the end (delta: 4.1GB). Free memory was 141.9MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 3.9GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.2s, 25 PlacesBefore, 20 PlacesAfterwards, 20 TransitionsBefore, 15 TransitionsAfterwards, 110 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 4 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 5 TotalNumberOfCompositions, 127 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 127, independent: 126, independent conditional: 0, independent unconditional: 126, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 69, independent: 68, independent conditional: 0, independent unconditional: 68, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 69, independent: 67, independent conditional: 0, independent unconditional: 67, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 5, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 127, independent: 58, independent conditional: 0, independent unconditional: 58, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 69, unknown conditional: 0, unknown unconditional: 69] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, 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: 73]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 68]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 67]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 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: 536.2s, OverallIterations: 41, TraceHistogramMax: 4, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 516.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1888 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1888 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 5.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 296 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12349 IncrementalHoareTripleChecker+Invalid, 12645 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 296 mSolverCounterUnsat, 0 mSDtfsCounter, 12349 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2110 GetRequests, 950 SyntacticMatches, 173 SemanticMatches, 987 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11127 ImplicationChecksByTransitivity, 7.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=226168occurred in iteration=40, InterpolantAutomatonStates: 853, 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: 0.4s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 7.7s InterpolantComputationTime, 1385 NumberOfCodeBlocks, 1364 NumberOfCodeBlocksAsserted, 124 NumberOfCheckSat, 1935 ConstructedInterpolants, 0 QuantifiedInterpolants, 5959 SizeOfPredicates, 34 NumberOfNonLiveVariables, 4800 ConjunctsInSsa, 307 ConjunctsInUnsatCore, 115 InterpolantComputations, 4 PerfectInterpolantSequences, 393/1098 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