/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 15:11:05,672 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 15:11:05,732 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 15:11:05,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 15:11:05,741 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 15:11:05,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 15:11:05,777 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 15:11:05,777 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 15:11:05,778 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 15:11:05,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 15:11:05,782 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 15:11:05,782 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 15:11:05,782 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 15:11:05,783 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 15:11:05,783 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 15:11:05,784 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 15:11:05,784 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 15:11:05,784 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 15:11:05,785 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 15:11:05,785 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 15:11:05,785 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 15:11:05,786 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 15:11:05,786 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 15:11:05,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 15:11:05,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 15:11:05,787 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 15:11:05,787 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 15:11:05,787 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:11:05,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 15:11:05,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 15:11:05,789 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 15:11:05,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 15:11:05,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 15:11:05,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 15:11:05,790 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 15:11:05,790 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 15:11:06,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 15:11:06,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 15:11:06,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 15:11:06,129 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 15:11:06,129 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 15:11:06,130 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-24 15:11:07,235 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 15:11:07,430 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 15:11:07,430 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-08-24 15:11:07,435 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be14d2df9/8cc84133a063431b8459a5a953890167/FLAGad529e4e1 [2023-08-24 15:11:07,445 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/be14d2df9/8cc84133a063431b8459a5a953890167 [2023-08-24 15:11:07,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 15:11:07,448 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 15:11:07,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 15:11:07,453 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 15:11:07,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 15:11:07,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,457 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7750430c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07, skipping insertion in model container [2023-08-24 15:11:07,457 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,475 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 15:11:07,617 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-alt.wvr.c[2087,2100] [2023-08-24 15:11:07,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:11:07,625 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 15:11:07,651 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-alt.wvr.c[2087,2100] [2023-08-24 15:11:07,657 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 15:11:07,665 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:11:07,665 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 15:11:07,671 INFO L206 MainTranslator]: Completed translation [2023-08-24 15:11:07,673 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07 WrapperNode [2023-08-24 15:11:07,673 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 15:11:07,674 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 15:11:07,674 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 15:11:07,674 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 15:11:07,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,686 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,710 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-08-24 15:11:07,710 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 15:11:07,711 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 15:11:07,711 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 15:11:07,711 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 15:11:07,718 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,718 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,728 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,729 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,736 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,738 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,739 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,740 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,742 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 15:11:07,742 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 15:11:07,743 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 15:11:07,743 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 15:11:07,743 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (1/1) ... [2023-08-24 15:11:07,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 15:11:07,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:07,786 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 15:11:07,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 15:11:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 15:11:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 15:11:07,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 15:11:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 15:11:07,830 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 15:11:07,830 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 15:11:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 15:11:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 15:11:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 15:11:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 15:11:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 15:11:07,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 15:11:07,831 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 15:11:07,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 15:11:07,833 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 15:11:07,946 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 15:11:07,948 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 15:11:08,108 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 15:11:08,151 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 15:11:08,151 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 15:11:08,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:11:08 BoogieIcfgContainer [2023-08-24 15:11:08,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 15:11:08,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 15:11:08,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 15:11:08,161 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 15:11:08,162 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:11:07" (1/3) ... [2023-08-24 15:11:08,162 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f780e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:11:08, skipping insertion in model container [2023-08-24 15:11:08,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:11:07" (2/3) ... [2023-08-24 15:11:08,163 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75f780e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:11:08, skipping insertion in model container [2023-08-24 15:11:08,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:11:08" (3/3) ... [2023-08-24 15:11:08,164 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-08-24 15:11:08,177 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 15:11:08,178 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 15:11:08,178 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 15:11:08,238 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 15:11:08,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 86 transitions, 188 flow [2023-08-24 15:11:08,318 INFO L124 PetriNetUnfolderBase]: 6/84 cut-off events. [2023-08-24 15:11:08,318 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:11:08,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 84 events. 6/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 15:11:08,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 86 transitions, 188 flow [2023-08-24 15:11:08,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2023-08-24 15:11:08,328 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 15:11:08,335 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 164 flow [2023-08-24 15:11:08,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 164 flow [2023-08-24 15:11:08,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 164 flow [2023-08-24 15:11:08,360 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2023-08-24 15:11:08,360 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:11:08,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 6/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 15:11:08,362 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-24 15:11:10,392 INFO L134 LiptonReduction]: Checked pairs total: 611 [2023-08-24 15:11:10,392 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-24 15:11:10,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 15:11:10,410 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4eea029c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 15:11:10,410 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 15:11:10,414 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 15:11:10,414 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 15:11:10,414 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 15:11:10,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:10,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:10,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:10,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1553731203, now seen corresponding path program 1 times [2023-08-24 15:11:10,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:10,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153777649] [2023-08-24 15:11:10,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:10,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:10,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:11,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:11,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:11,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153777649] [2023-08-24 15:11:11,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153777649] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:11:11,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:11:11,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:11:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352849428] [2023-08-24 15:11:11,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:11:11,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:11:11,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:11,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:11:11,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:11:11,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:11,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:11,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:11,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:11,193 INFO L124 PetriNetUnfolderBase]: 76/144 cut-off events. [2023-08-24 15:11:11,194 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-24 15:11:11,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 144 events. 76/144 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 414 event pairs, 6 based on Foata normal form. 1/111 useless extension candidates. Maximal degree in co-relation 232. Up to 81 conditions per place. [2023-08-24 15:11:11,196 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 9 changer transitions 5/47 dead transitions. [2023-08-24 15:11:11,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 47 transitions, 221 flow [2023-08-24 15:11:11,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:11:11,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:11:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 440 transitions. [2023-08-24 15:11:11,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39783001808318263 [2023-08-24 15:11:11,210 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 440 transitions. [2023-08-24 15:11:11,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 440 transitions. [2023-08-24 15:11:11,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:11,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 440 transitions. [2023-08-24 15:11:11,217 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,221 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,222 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,223 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 440 transitions. [2023-08-24 15:11:11,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 47 transitions, 221 flow [2023-08-24 15:11:11,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 15:11:11,227 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 94 flow [2023-08-24 15:11:11,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=94, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 15:11:11,232 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-24 15:11:11,232 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 94 flow [2023-08-24 15:11:11,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:11,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:11,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 15:11:11,233 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:11,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:11,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1871234245, now seen corresponding path program 2 times [2023-08-24 15:11:11,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:11,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586067372] [2023-08-24 15:11:11,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:11,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:11,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586067372] [2023-08-24 15:11:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586067372] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:11:11,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:11:11,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:11:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385515222] [2023-08-24 15:11:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:11:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:11:11,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:11:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:11:11,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:11,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 94 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:11,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:11,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:11,610 INFO L124 PetriNetUnfolderBase]: 81/153 cut-off events. [2023-08-24 15:11:11,611 INFO L125 PetriNetUnfolderBase]: For 75/75 co-relation queries the response was YES. [2023-08-24 15:11:11,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467 conditions, 153 events. 81/153 cut-off events. For 75/75 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 464 event pairs, 2 based on Foata normal form. 1/146 useless extension candidates. Maximal degree in co-relation 453. Up to 85 conditions per place. [2023-08-24 15:11:11,613 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 34 selfloop transitions, 14 changer transitions 5/53 dead transitions. [2023-08-24 15:11:11,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 53 transitions, 303 flow [2023-08-24 15:11:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 15:11:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 15:11:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 498 transitions. [2023-08-24 15:11:11,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939873417721519 [2023-08-24 15:11:11,616 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 498 transitions. [2023-08-24 15:11:11,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 498 transitions. [2023-08-24 15:11:11,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:11,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 498 transitions. [2023-08-24 15:11:11,619 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 62.25) internal successors, (498), 8 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,622 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 158.0) internal successors, (1422), 9 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,623 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 94 flow. Second operand 8 states and 498 transitions. [2023-08-24 15:11:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 53 transitions, 303 flow [2023-08-24 15:11:11,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 53 transitions, 289 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-24 15:11:11,626 INFO L231 Difference]: Finished difference. Result has 37 places, 30 transitions, 171 flow [2023-08-24 15:11:11,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=171, PETRI_PLACES=37, PETRI_TRANSITIONS=30} [2023-08-24 15:11:11,628 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 17 predicate places. [2023-08-24 15:11:11,628 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 30 transitions, 171 flow [2023-08-24 15:11:11,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:11,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:11,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 15:11:11,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:11,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:11,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1091143127, now seen corresponding path program 3 times [2023-08-24 15:11:11,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:11,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937486846] [2023-08-24 15:11:11,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:11,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:11,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:11,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:11,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937486846] [2023-08-24 15:11:11,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937486846] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:11:11,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:11:11,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:11:11,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142269009] [2023-08-24 15:11:11,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:11:11,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:11:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:11,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:11:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:11:11,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:11,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 30 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:11,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:11,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:11,976 INFO L124 PetriNetUnfolderBase]: 87/163 cut-off events. [2023-08-24 15:11:11,976 INFO L125 PetriNetUnfolderBase]: For 235/235 co-relation queries the response was YES. [2023-08-24 15:11:11,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 621 conditions, 163 events. 87/163 cut-off events. For 235/235 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 474 event pairs, 18 based on Foata normal form. 1/156 useless extension candidates. Maximal degree in co-relation 604. Up to 91 conditions per place. [2023-08-24 15:11:11,978 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 30 selfloop transitions, 18 changer transitions 5/53 dead transitions. [2023-08-24 15:11:11,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 375 flow [2023-08-24 15:11:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:11:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:11:11,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2023-08-24 15:11:11,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969258589511754 [2023-08-24 15:11:11,980 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2023-08-24 15:11:11,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2023-08-24 15:11:11,981 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:11,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2023-08-24 15:11:11,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,984 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,984 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,984 INFO L175 Difference]: Start difference. First operand has 37 places, 30 transitions, 171 flow. Second operand 7 states and 439 transitions. [2023-08-24 15:11:11,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 375 flow [2023-08-24 15:11:11,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 53 transitions, 349 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-24 15:11:11,988 INFO L231 Difference]: Finished difference. Result has 44 places, 36 transitions, 257 flow [2023-08-24 15:11:11,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=257, PETRI_PLACES=44, PETRI_TRANSITIONS=36} [2023-08-24 15:11:11,988 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-08-24 15:11:11,988 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 36 transitions, 257 flow [2023-08-24 15:11:11,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:11,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:11,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:11,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 15:11:11,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:11,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:11,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1384482575, now seen corresponding path program 4 times [2023-08-24 15:11:11,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:11,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647562308] [2023-08-24 15:11:11,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:12,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:12,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:12,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647562308] [2023-08-24 15:11:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647562308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:11:12,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:11:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:11:12,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811791560] [2023-08-24 15:11:12,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:11:12,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:11:12,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:11:12,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:11:12,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:12,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 257 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:12,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:12,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:12,285 INFO L124 PetriNetUnfolderBase]: 101/191 cut-off events. [2023-08-24 15:11:12,285 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2023-08-24 15:11:12,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 191 events. 101/191 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 613 event pairs, 14 based on Foata normal form. 1/174 useless extension candidates. Maximal degree in co-relation 731. Up to 99 conditions per place. [2023-08-24 15:11:12,288 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 33 selfloop transitions, 24 changer transitions 5/62 dead transitions. [2023-08-24 15:11:12,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 490 flow [2023-08-24 15:11:12,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:11:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:11:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 439 transitions. [2023-08-24 15:11:12,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3969258589511754 [2023-08-24 15:11:12,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 439 transitions. [2023-08-24 15:11:12,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 439 transitions. [2023-08-24 15:11:12,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:12,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 439 transitions. [2023-08-24 15:11:12,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.714285714285715) internal successors, (439), 7 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,294 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,294 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 257 flow. Second operand 7 states and 439 transitions. [2023-08-24 15:11:12,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 490 flow [2023-08-24 15:11:12,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 62 transitions, 463 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-24 15:11:12,298 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 361 flow [2023-08-24 15:11:12,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=361, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2023-08-24 15:11:12,299 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-08-24 15:11:12,299 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 361 flow [2023-08-24 15:11:12,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:12,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:12,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 15:11:12,300 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:12,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1307168305, now seen corresponding path program 5 times [2023-08-24 15:11:12,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:12,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234655017] [2023-08-24 15:11:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:12,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:12,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:12,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234655017] [2023-08-24 15:11:12,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234655017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:11:12,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:11:12,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:11:12,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635883854] [2023-08-24 15:11:12,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:11:12,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:11:12,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:12,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:11:12,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:11:12,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:12,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 361 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:12,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:12,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:12,616 INFO L124 PetriNetUnfolderBase]: 112/216 cut-off events. [2023-08-24 15:11:12,616 INFO L125 PetriNetUnfolderBase]: For 547/547 co-relation queries the response was YES. [2023-08-24 15:11:12,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 939 conditions, 216 events. 112/216 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 736 event pairs, 18 based on Foata normal form. 1/215 useless extension candidates. Maximal degree in co-relation 916. Up to 103 conditions per place. [2023-08-24 15:11:12,619 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 35 selfloop transitions, 26 changer transitions 5/66 dead transitions. [2023-08-24 15:11:12,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 573 flow [2023-08-24 15:11:12,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:11:12,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:11:12,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 441 transitions. [2023-08-24 15:11:12,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3987341772151899 [2023-08-24 15:11:12,621 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 441 transitions. [2023-08-24 15:11:12,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 441 transitions. [2023-08-24 15:11:12,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:12,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 441 transitions. [2023-08-24 15:11:12,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.0) internal successors, (441), 7 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,626 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,626 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 361 flow. Second operand 7 states and 441 transitions. [2023-08-24 15:11:12,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 573 flow [2023-08-24 15:11:12,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 559 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-24 15:11:12,632 INFO L231 Difference]: Finished difference. Result has 56 places, 45 transitions, 435 flow [2023-08-24 15:11:12,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=435, PETRI_PLACES=56, PETRI_TRANSITIONS=45} [2023-08-24 15:11:12,634 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-24 15:11:12,634 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 45 transitions, 435 flow [2023-08-24 15:11:12,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:12,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:12,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 15:11:12,635 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:12,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:12,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1118848757, now seen corresponding path program 6 times [2023-08-24 15:11:12,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:12,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241559636] [2023-08-24 15:11:12,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:12,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:12,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:12,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:12,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:12,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241559636] [2023-08-24 15:11:12,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241559636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 15:11:12,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 15:11:12,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 15:11:12,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16348646] [2023-08-24 15:11:12,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 15:11:12,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 15:11:12,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:12,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 15:11:12,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-24 15:11:12,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:12,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 45 transitions, 435 flow. Second operand has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:12,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:12,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:12,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:13,010 INFO L124 PetriNetUnfolderBase]: 131/247 cut-off events. [2023-08-24 15:11:13,010 INFO L125 PetriNetUnfolderBase]: For 826/826 co-relation queries the response was YES. [2023-08-24 15:11:13,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1139 conditions, 247 events. 131/247 cut-off events. For 826/826 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 868 event pairs, 40 based on Foata normal form. 1/246 useless extension candidates. Maximal degree in co-relation 1118. Up to 111 conditions per place. [2023-08-24 15:11:13,013 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 36 selfloop transitions, 27 changer transitions 5/68 dead transitions. [2023-08-24 15:11:13,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 68 transitions, 653 flow [2023-08-24 15:11:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 15:11:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 15:11:13,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 443 transitions. [2023-08-24 15:11:13,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40054249547920434 [2023-08-24 15:11:13,015 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 443 transitions. [2023-08-24 15:11:13,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 443 transitions. [2023-08-24 15:11:13,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:13,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 443 transitions. [2023-08-24 15:11:13,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 63.285714285714285) internal successors, (443), 7 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:13,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:13,019 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 158.0) internal successors, (1264), 8 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:13,019 INFO L175 Difference]: Start difference. First operand has 56 places, 45 transitions, 435 flow. Second operand 7 states and 443 transitions. [2023-08-24 15:11:13,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 68 transitions, 653 flow [2023-08-24 15:11:13,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-24 15:11:13,024 INFO L231 Difference]: Finished difference. Result has 58 places, 46 transitions, 486 flow [2023-08-24 15:11:13,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=486, PETRI_PLACES=58, PETRI_TRANSITIONS=46} [2023-08-24 15:11:13,025 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-08-24 15:11:13,025 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 46 transitions, 486 flow [2023-08-24 15:11:13,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 57.857142857142854) internal successors, (405), 7 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:13,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:13,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:13,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 15:11:13,026 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:13,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -898108289, now seen corresponding path program 1 times [2023-08-24 15:11:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789326920] [2023-08-24 15:11:13,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:13,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:13,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:13,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:13,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789326920] [2023-08-24 15:11:13,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789326920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:13,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467260571] [2023-08-24 15:11:13,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:13,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:13,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:13,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:13,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 15:11:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:13,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:13,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:13,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:13,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:13,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467260571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:13,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:13,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:13,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696897196] [2023-08-24 15:11:13,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:13,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:13,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:13,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:13,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:13,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 486 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:13,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:13,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:13,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:14,211 INFO L124 PetriNetUnfolderBase]: 146/311 cut-off events. [2023-08-24 15:11:14,211 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-08-24 15:11:14,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 311 events. 146/311 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1353 event pairs, 10 based on Foata normal form. 30/341 useless extension candidates. Maximal degree in co-relation 1251. Up to 81 conditions per place. [2023-08-24 15:11:14,214 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 72 selfloop transitions, 26 changer transitions 22/120 dead transitions. [2023-08-24 15:11:14,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 889 flow [2023-08-24 15:11:14,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 15:11:14,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 15:11:14,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1124 transitions. [2023-08-24 15:11:14,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952180028129395 [2023-08-24 15:11:14,218 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1124 transitions. [2023-08-24 15:11:14,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1124 transitions. [2023-08-24 15:11:14,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:14,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1124 transitions. [2023-08-24 15:11:14,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 62.44444444444444) internal successors, (1124), 18 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:14,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:14,228 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:14,228 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 486 flow. Second operand 18 states and 1124 transitions. [2023-08-24 15:11:14,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 889 flow [2023-08-24 15:11:14,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 782 flow, removed 17 selfloop flow, removed 11 redundant places. [2023-08-24 15:11:14,233 INFO L231 Difference]: Finished difference. Result has 71 places, 44 transitions, 403 flow [2023-08-24 15:11:14,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=46, 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=18, PETRI_FLOW=403, PETRI_PLACES=71, PETRI_TRANSITIONS=44} [2023-08-24 15:11:14,234 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-08-24 15:11:14,234 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 44 transitions, 403 flow [2023-08-24 15:11:14,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:14,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:14,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:14,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:14,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:14,440 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:14,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1946707435, now seen corresponding path program 2 times [2023-08-24 15:11:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614551505] [2023-08-24 15:11:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:14,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614551505] [2023-08-24 15:11:14,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614551505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:14,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536501429] [2023-08-24 15:11:14,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:11:14,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:14,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:14,617 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:14,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 15:11:14,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:14,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:14,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:14,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:14,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:15,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536501429] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:15,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:15,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266297644] [2023-08-24 15:11:15,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:15,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:15,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:15,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:15,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:15,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 44 transitions, 403 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:15,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:15,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:15,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:15,555 INFO L124 PetriNetUnfolderBase]: 162/337 cut-off events. [2023-08-24 15:11:15,555 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2023-08-24 15:11:15,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1604 conditions, 337 events. 162/337 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1451 event pairs, 18 based on Foata normal form. 2/339 useless extension candidates. Maximal degree in co-relation 1577. Up to 125 conditions per place. [2023-08-24 15:11:15,559 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 69 selfloop transitions, 40 changer transitions 10/119 dead transitions. [2023-08-24 15:11:15,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 119 transitions, 994 flow [2023-08-24 15:11:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:11:15,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:11:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1173 transitions. [2023-08-24 15:11:15,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39073950699533644 [2023-08-24 15:11:15,563 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1173 transitions. [2023-08-24 15:11:15,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1173 transitions. [2023-08-24 15:11:15,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:15,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1173 transitions. [2023-08-24 15:11:15,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 61.73684210526316) internal successors, (1173), 19 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:15,571 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:15,571 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:15,572 INFO L175 Difference]: Start difference. First operand has 71 places, 44 transitions, 403 flow. Second operand 19 states and 1173 transitions. [2023-08-24 15:11:15,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 119 transitions, 994 flow [2023-08-24 15:11:15,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 821 flow, removed 75 selfloop flow, removed 9 redundant places. [2023-08-24 15:11:15,580 INFO L231 Difference]: Finished difference. Result has 77 places, 59 transitions, 504 flow [2023-08-24 15:11:15,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=504, PETRI_PLACES=77, PETRI_TRANSITIONS=59} [2023-08-24 15:11:15,582 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-08-24 15:11:15,582 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 59 transitions, 504 flow [2023-08-24 15:11:15,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:15,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:15,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:15,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:15,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-08-24 15:11:15,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:15,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1871172835, now seen corresponding path program 3 times [2023-08-24 15:11:15,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:15,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783220149] [2023-08-24 15:11:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:15,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:16,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:16,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783220149] [2023-08-24 15:11:16,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783220149] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:16,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128130725] [2023-08-24 15:11:16,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:11:16,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:16,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:16,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:16,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 15:11:16,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:11:16,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:16,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:16,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:16,276 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:16,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:16,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128130725] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:16,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:16,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-24 15:11:16,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45805927] [2023-08-24 15:11:16,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:16,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:16,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:16,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:16,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:16,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 59 transitions, 504 flow. Second operand has 20 states, 20 states have (on average 53.0) internal successors, (1060), 20 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:16,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:16,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:16,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:16,997 INFO L124 PetriNetUnfolderBase]: 163/338 cut-off events. [2023-08-24 15:11:16,997 INFO L125 PetriNetUnfolderBase]: For 1307/1307 co-relation queries the response was YES. [2023-08-24 15:11:16,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1587 conditions, 338 events. 163/338 cut-off events. For 1307/1307 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1455 event pairs, 14 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 1562. Up to 123 conditions per place. [2023-08-24 15:11:17,000 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 73 selfloop transitions, 38 changer transitions 10/121 dead transitions. [2023-08-24 15:11:17,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 121 transitions, 982 flow [2023-08-24 15:11:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:11:17,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:11:17,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1080 transitions. [2023-08-24 15:11:17,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597601598934044 [2023-08-24 15:11:17,004 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1080 transitions. [2023-08-24 15:11:17,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1080 transitions. [2023-08-24 15:11:17,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:17,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1080 transitions. [2023-08-24 15:11:17,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:17,010 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:17,011 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:17,011 INFO L175 Difference]: Start difference. First operand has 77 places, 59 transitions, 504 flow. Second operand 19 states and 1080 transitions. [2023-08-24 15:11:17,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 121 transitions, 982 flow [2023-08-24 15:11:17,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 121 transitions, 885 flow, removed 25 selfloop flow, removed 8 redundant places. [2023-08-24 15:11:17,018 INFO L231 Difference]: Finished difference. Result has 87 places, 59 transitions, 503 flow [2023-08-24 15:11:17,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=503, PETRI_PLACES=87, PETRI_TRANSITIONS=59} [2023-08-24 15:11:17,020 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 67 predicate places. [2023-08-24 15:11:17,020 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 59 transitions, 503 flow [2023-08-24 15:11:17,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 53.0) internal successors, (1060), 20 states have internal predecessors, (1060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:17,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:17,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:17,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:17,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:17,226 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:17,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:17,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2071749471, now seen corresponding path program 4 times [2023-08-24 15:11:17,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:17,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710697862] [2023-08-24 15:11:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:17,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:17,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:17,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:17,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710697862] [2023-08-24 15:11:17,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710697862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:17,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313776986] [2023-08-24 15:11:17,377 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:11:17,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:17,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:17,378 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:17,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 15:11:17,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:11:17,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:17,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:17,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:17,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:17,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313776986] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:17,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:17,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:17,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272627376] [2023-08-24 15:11:17,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:17,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:17,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:17,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:17,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 59 transitions, 503 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:17,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:17,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:17,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:18,425 INFO L124 PetriNetUnfolderBase]: 209/447 cut-off events. [2023-08-24 15:11:18,425 INFO L125 PetriNetUnfolderBase]: For 1842/1842 co-relation queries the response was YES. [2023-08-24 15:11:18,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2152 conditions, 447 events. 209/447 cut-off events. For 1842/1842 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2157 event pairs, 30 based on Foata normal form. 3/446 useless extension candidates. Maximal degree in co-relation 2126. Up to 288 conditions per place. [2023-08-24 15:11:18,429 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 82 selfloop transitions, 44 changer transitions 15/141 dead transitions. [2023-08-24 15:11:18,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 141 transitions, 1227 flow [2023-08-24 15:11:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:11:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:11:18,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1285 transitions. [2023-08-24 15:11:18,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872814948764316 [2023-08-24 15:11:18,435 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1285 transitions. [2023-08-24 15:11:18,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1285 transitions. [2023-08-24 15:11:18,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:18,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1285 transitions. [2023-08-24 15:11:18,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 61.19047619047619) internal successors, (1285), 21 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:18,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:18,444 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:18,444 INFO L175 Difference]: Start difference. First operand has 87 places, 59 transitions, 503 flow. Second operand 21 states and 1285 transitions. [2023-08-24 15:11:18,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 141 transitions, 1227 flow [2023-08-24 15:11:18,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 141 transitions, 1083 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-08-24 15:11:18,457 INFO L231 Difference]: Finished difference. Result has 97 places, 83 transitions, 757 flow [2023-08-24 15:11:18,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=757, PETRI_PLACES=97, PETRI_TRANSITIONS=83} [2023-08-24 15:11:18,458 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-08-24 15:11:18,458 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 83 transitions, 757 flow [2023-08-24 15:11:18,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:18,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:18,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:18,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:18,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:18,664 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:18,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:18,664 INFO L85 PathProgramCache]: Analyzing trace with hash -352811119, now seen corresponding path program 5 times [2023-08-24 15:11:18,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:18,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552420762] [2023-08-24 15:11:18,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:18,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:18,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:18,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:18,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552420762] [2023-08-24 15:11:18,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552420762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:18,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243709516] [2023-08-24 15:11:18,820 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:11:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:18,822 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:18,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 15:11:18,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:18,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:18,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:18,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:19,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:19,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:19,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243709516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:19,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:19,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:19,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442987965] [2023-08-24 15:11:19,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:19,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:19,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:19,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:19,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 83 transitions, 757 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:19,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:19,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:19,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:19,487 INFO L124 PetriNetUnfolderBase]: 209/440 cut-off events. [2023-08-24 15:11:19,487 INFO L125 PetriNetUnfolderBase]: For 1635/1635 co-relation queries the response was YES. [2023-08-24 15:11:19,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2124 conditions, 440 events. 209/440 cut-off events. For 1635/1635 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2091 event pairs, 36 based on Foata normal form. 2/438 useless extension candidates. Maximal degree in co-relation 2093. Up to 355 conditions per place. [2023-08-24 15:11:19,491 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 69 selfloop transitions, 30 changer transitions 10/109 dead transitions. [2023-08-24 15:11:19,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 109 transitions, 1057 flow [2023-08-24 15:11:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 15:11:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 15:11:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 790 transitions. [2023-08-24 15:11:19,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38461538461538464 [2023-08-24 15:11:19,493 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 790 transitions. [2023-08-24 15:11:19,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 790 transitions. [2023-08-24 15:11:19,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:19,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 790 transitions. [2023-08-24 15:11:19,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 60.76923076923077) internal successors, (790), 13 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:19,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:19,497 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 158.0) internal successors, (2212), 14 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:19,498 INFO L175 Difference]: Start difference. First operand has 97 places, 83 transitions, 757 flow. Second operand 13 states and 790 transitions. [2023-08-24 15:11:19,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 109 transitions, 1057 flow [2023-08-24 15:11:19,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 950 flow, removed 32 selfloop flow, removed 10 redundant places. [2023-08-24 15:11:19,512 INFO L231 Difference]: Finished difference. Result has 99 places, 84 transitions, 735 flow [2023-08-24 15:11:19,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=735, PETRI_PLACES=99, PETRI_TRANSITIONS=84} [2023-08-24 15:11:19,512 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 15:11:19,512 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 84 transitions, 735 flow [2023-08-24 15:11:19,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:19,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:19,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:19,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:19,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 15:11:19,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:19,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2145929061, now seen corresponding path program 6 times [2023-08-24 15:11:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583455548] [2023-08-24 15:11:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:19,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583455548] [2023-08-24 15:11:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583455548] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:19,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411285877] [2023-08-24 15:11:19,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:11:19,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:19,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:19,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:19,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 15:11:19,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:11:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:19,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:19,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:20,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:20,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:20,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411285877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:20,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:20,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:20,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066072179] [2023-08-24 15:11:20,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:20,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:20,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:20,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:20,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:20,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:20,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 84 transitions, 735 flow. Second operand has 19 states, 19 states have (on average 58.05263157894737) internal successors, (1103), 19 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:20,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:20,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:20,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:20,940 INFO L124 PetriNetUnfolderBase]: 209/436 cut-off events. [2023-08-24 15:11:20,941 INFO L125 PetriNetUnfolderBase]: For 1243/1243 co-relation queries the response was YES. [2023-08-24 15:11:20,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2031 conditions, 436 events. 209/436 cut-off events. For 1243/1243 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2073 event pairs, 30 based on Foata normal form. 4/436 useless extension candidates. Maximal degree in co-relation 2000. Up to 289 conditions per place. [2023-08-24 15:11:20,944 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 63 selfloop transitions, 39 changer transitions 32/134 dead transitions. [2023-08-24 15:11:20,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 134 transitions, 1159 flow [2023-08-24 15:11:20,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:11:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:11:20,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1276 transitions. [2023-08-24 15:11:20,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3845690174804099 [2023-08-24 15:11:20,947 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1276 transitions. [2023-08-24 15:11:20,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1276 transitions. [2023-08-24 15:11:20,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:20,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1276 transitions. [2023-08-24 15:11:20,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.76190476190476) internal successors, (1276), 21 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:20,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:20,954 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:20,954 INFO L175 Difference]: Start difference. First operand has 99 places, 84 transitions, 735 flow. Second operand 21 states and 1276 transitions. [2023-08-24 15:11:20,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 134 transitions, 1159 flow [2023-08-24 15:11:20,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 134 transitions, 1084 flow, removed 2 selfloop flow, removed 12 redundant places. [2023-08-24 15:11:20,962 INFO L231 Difference]: Finished difference. Result has 112 places, 82 transitions, 772 flow [2023-08-24 15:11:20,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=772, PETRI_PLACES=112, PETRI_TRANSITIONS=82} [2023-08-24 15:11:20,963 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-08-24 15:11:20,963 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 82 transitions, 772 flow [2023-08-24 15:11:20,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.05263157894737) internal successors, (1103), 19 states have internal predecessors, (1103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:20,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:20,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:20,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:21,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:21,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:21,169 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:21,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1166641207, now seen corresponding path program 7 times [2023-08-24 15:11:21,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:21,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871023617] [2023-08-24 15:11:21,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:21,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871023617] [2023-08-24 15:11:21,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871023617] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:21,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674879204] [2023-08-24 15:11:21,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:11:21,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:21,334 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:21,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 15:11:21,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:21,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:21,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:21,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674879204] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:21,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:21,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:21,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549201487] [2023-08-24 15:11:21,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:21,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:21,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:21,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:21,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:21,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:21,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 82 transitions, 772 flow. Second operand has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:21,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:21,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:21,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:21,940 INFO L124 PetriNetUnfolderBase]: 196/405 cut-off events. [2023-08-24 15:11:21,940 INFO L125 PetriNetUnfolderBase]: For 1556/1556 co-relation queries the response was YES. [2023-08-24 15:11:21,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 405 events. 196/405 cut-off events. For 1556/1556 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1824 event pairs, 31 based on Foata normal form. 2/403 useless extension candidates. Maximal degree in co-relation 2017. Up to 355 conditions per place. [2023-08-24 15:11:21,944 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 77 selfloop transitions, 15 changer transitions 10/102 dead transitions. [2023-08-24 15:11:21,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 102 transitions, 1055 flow [2023-08-24 15:11:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-24 15:11:21,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-24 15:11:21,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 605 transitions. [2023-08-24 15:11:21,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829113924050633 [2023-08-24 15:11:21,946 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 605 transitions. [2023-08-24 15:11:21,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 605 transitions. [2023-08-24 15:11:21,946 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:21,946 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 605 transitions. [2023-08-24 15:11:21,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 60.5) internal successors, (605), 10 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:21,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:21,949 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 158.0) internal successors, (1738), 11 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:21,949 INFO L175 Difference]: Start difference. First operand has 112 places, 82 transitions, 772 flow. Second operand 10 states and 605 transitions. [2023-08-24 15:11:21,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 102 transitions, 1055 flow [2023-08-24 15:11:21,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 102 transitions, 965 flow, removed 12 selfloop flow, removed 19 redundant places. [2023-08-24 15:11:21,958 INFO L231 Difference]: Finished difference. Result has 97 places, 84 transitions, 747 flow [2023-08-24 15:11:21,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=747, PETRI_PLACES=97, PETRI_TRANSITIONS=84} [2023-08-24 15:11:21,959 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-08-24 15:11:21,959 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 84 transitions, 747 flow [2023-08-24 15:11:21,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.0) internal successors, (1102), 19 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:21,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:21,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:21,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:22,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:22,167 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:22,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1825010711, now seen corresponding path program 8 times [2023-08-24 15:11:22,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:22,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78712475] [2023-08-24 15:11:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:22,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:22,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78712475] [2023-08-24 15:11:22,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78712475] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:22,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970893734] [2023-08-24 15:11:22,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:11:22,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:22,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:22,358 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:22,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 15:11:22,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:22,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:22,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:22,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:22,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970893734] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:22,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-24 15:11:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084495212] [2023-08-24 15:11:22,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:22,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:22,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:22,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:22,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:22,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:22,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 84 transitions, 747 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:22,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:22,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:22,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:23,497 INFO L124 PetriNetUnfolderBase]: 209/471 cut-off events. [2023-08-24 15:11:23,497 INFO L125 PetriNetUnfolderBase]: For 1554/1554 co-relation queries the response was YES. [2023-08-24 15:11:23,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 471 events. 209/471 cut-off events. For 1554/1554 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2430 event pairs, 31 based on Foata normal form. 3/468 useless extension candidates. Maximal degree in co-relation 2192. Up to 322 conditions per place. [2023-08-24 15:11:23,501 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 108 selfloop transitions, 32 changer transitions 15/155 dead transitions. [2023-08-24 15:11:23,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 155 transitions, 1398 flow [2023-08-24 15:11:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:11:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:11:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1173 transitions. [2023-08-24 15:11:23,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3535262206148282 [2023-08-24 15:11:23,504 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1173 transitions. [2023-08-24 15:11:23,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1173 transitions. [2023-08-24 15:11:23,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:23,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1173 transitions. [2023-08-24 15:11:23,507 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 55.857142857142854) internal successors, (1173), 21 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:23,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:23,511 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:23,511 INFO L175 Difference]: Start difference. First operand has 97 places, 84 transitions, 747 flow. Second operand 21 states and 1173 transitions. [2023-08-24 15:11:23,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 155 transitions, 1398 flow [2023-08-24 15:11:23,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 155 transitions, 1358 flow, removed 7 selfloop flow, removed 7 redundant places. [2023-08-24 15:11:23,522 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 936 flow [2023-08-24 15:11:23,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=936, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-08-24 15:11:23,522 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2023-08-24 15:11:23,522 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 936 flow [2023-08-24 15:11:23,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:23,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:23,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:23,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:23,728 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,SelfDestructingSolverStorable13 [2023-08-24 15:11:23,729 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:23,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:23,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1749476111, now seen corresponding path program 9 times [2023-08-24 15:11:23,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:23,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421789681] [2023-08-24 15:11:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:23,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:23,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:23,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:23,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421789681] [2023-08-24 15:11:23,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421789681] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:23,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146129257] [2023-08-24 15:11:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:11:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:23,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:23,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 15:11:23,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:11:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:23,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:23,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:24,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:24,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146129257] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:24,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:24,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-24 15:11:24,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728239483] [2023-08-24 15:11:24,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:24,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:24,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:24,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:24,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:24,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:24,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 936 flow. Second operand has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:24,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:24,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:24,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:24,823 INFO L124 PetriNetUnfolderBase]: 206/449 cut-off events. [2023-08-24 15:11:24,823 INFO L125 PetriNetUnfolderBase]: For 1894/1894 co-relation queries the response was YES. [2023-08-24 15:11:24,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 449 events. 206/449 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2236 event pairs, 31 based on Foata normal form. 4/449 useless extension candidates. Maximal degree in co-relation 2248. Up to 322 conditions per place. [2023-08-24 15:11:24,827 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 81 selfloop transitions, 30 changer transitions 25/136 dead transitions. [2023-08-24 15:11:24,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 136 transitions, 1357 flow [2023-08-24 15:11:24,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:11:24,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:11:24,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1145 transitions. [2023-08-24 15:11:24,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814123917388408 [2023-08-24 15:11:24,830 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1145 transitions. [2023-08-24 15:11:24,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1145 transitions. [2023-08-24 15:11:24,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:24,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1145 transitions. [2023-08-24 15:11:24,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.26315789473684) internal successors, (1145), 19 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:24,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:24,836 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:24,836 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 936 flow. Second operand 19 states and 1145 transitions. [2023-08-24 15:11:24,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 136 transitions, 1357 flow [2023-08-24 15:11:24,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 136 transitions, 1242 flow, removed 43 selfloop flow, removed 10 redundant places. [2023-08-24 15:11:24,848 INFO L231 Difference]: Finished difference. Result has 126 places, 95 transitions, 935 flow [2023-08-24 15:11:24,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=935, PETRI_PLACES=126, PETRI_TRANSITIONS=95} [2023-08-24 15:11:24,848 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 106 predicate places. [2023-08-24 15:11:24,848 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 95 transitions, 935 flow [2023-08-24 15:11:24,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.10526315789474) internal successors, (1104), 19 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:24,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:24,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:24,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 15:11:25,053 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,SelfDestructingSolverStorable14 [2023-08-24 15:11:25,054 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:25,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:25,054 INFO L85 PathProgramCache]: Analyzing trace with hash -751018233, now seen corresponding path program 10 times [2023-08-24 15:11:25,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:25,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190891714] [2023-08-24 15:11:25,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:25,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:25,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190891714] [2023-08-24 15:11:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190891714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:25,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58854430] [2023-08-24 15:11:25,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:11:25,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:25,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:25,301 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:25,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 15:11:25,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:11:25,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:25,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:25,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:25,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:25,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:25,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58854430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:25,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:25,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-24 15:11:25,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486291862] [2023-08-24 15:11:25,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:25,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:25,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:25,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:25,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 95 transitions, 935 flow. Second operand has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:25,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:25,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:25,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:26,026 INFO L124 PetriNetUnfolderBase]: 189/397 cut-off events. [2023-08-24 15:11:26,026 INFO L125 PetriNetUnfolderBase]: For 1743/1743 co-relation queries the response was YES. [2023-08-24 15:11:26,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2099 conditions, 397 events. 189/397 cut-off events. For 1743/1743 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 1819 event pairs, 31 based on Foata normal form. 3/396 useless extension candidates. Maximal degree in co-relation 2056. Up to 332 conditions per place. [2023-08-24 15:11:26,029 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 84 selfloop transitions, 21 changer transitions 11/116 dead transitions. [2023-08-24 15:11:26,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 116 transitions, 1258 flow [2023-08-24 15:11:26,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:11:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:11:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 770 transitions. [2023-08-24 15:11:26,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34810126582278483 [2023-08-24 15:11:26,031 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 770 transitions. [2023-08-24 15:11:26,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 770 transitions. [2023-08-24 15:11:26,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:26,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 770 transitions. [2023-08-24 15:11:26,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 55.0) internal successors, (770), 14 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:26,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:26,035 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:26,035 INFO L175 Difference]: Start difference. First operand has 126 places, 95 transitions, 935 flow. Second operand 14 states and 770 transitions. [2023-08-24 15:11:26,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 116 transitions, 1258 flow [2023-08-24 15:11:26,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 116 transitions, 1161 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-08-24 15:11:26,047 INFO L231 Difference]: Finished difference. Result has 114 places, 93 transitions, 893 flow [2023-08-24 15:11:26,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=114, PETRI_TRANSITIONS=93} [2023-08-24 15:11:26,048 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 94 predicate places. [2023-08-24 15:11:26,048 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 93 transitions, 893 flow [2023-08-24 15:11:26,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.9) internal successors, (1058), 20 states have internal predecessors, (1058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:26,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:26,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:26,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:26,253 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,SelfDestructingSolverStorable15 [2023-08-24 15:11:26,253 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:26,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:26,254 INFO L85 PathProgramCache]: Analyzing trace with hash 787817725, now seen corresponding path program 1 times [2023-08-24 15:11:26,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:26,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344235396] [2023-08-24 15:11:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:26,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:26,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344235396] [2023-08-24 15:11:26,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344235396] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:26,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885495779] [2023-08-24 15:11:26,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:26,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:26,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:26,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:26,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 15:11:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:26,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:26,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:26,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:26,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:26,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885495779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:26,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:26,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-24 15:11:26,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286711135] [2023-08-24 15:11:26,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:26,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-24 15:11:26,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:26,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-24 15:11:26,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2023-08-24 15:11:26,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:26,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 93 transitions, 893 flow. Second operand has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:26,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:26,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:26,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:27,087 INFO L124 PetriNetUnfolderBase]: 221/449 cut-off events. [2023-08-24 15:11:27,088 INFO L125 PetriNetUnfolderBase]: For 1684/1684 co-relation queries the response was YES. [2023-08-24 15:11:27,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2260 conditions, 449 events. 221/449 cut-off events. For 1684/1684 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2088 event pairs, 20 based on Foata normal form. 3/448 useless extension candidates. Maximal degree in co-relation 2219. Up to 113 conditions per place. [2023-08-24 15:11:27,092 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 77 selfloop transitions, 47 changer transitions 30/154 dead transitions. [2023-08-24 15:11:27,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 154 transitions, 1463 flow [2023-08-24 15:11:27,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:11:27,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:11:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 874 transitions. [2023-08-24 15:11:27,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39511754068716093 [2023-08-24 15:11:27,095 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 874 transitions. [2023-08-24 15:11:27,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 874 transitions. [2023-08-24 15:11:27,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:27,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 874 transitions. [2023-08-24 15:11:27,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 62.42857142857143) internal successors, (874), 14 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:27,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:27,100 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:27,100 INFO L175 Difference]: Start difference. First operand has 114 places, 93 transitions, 893 flow. Second operand 14 states and 874 transitions. [2023-08-24 15:11:27,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 154 transitions, 1463 flow [2023-08-24 15:11:27,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 154 transitions, 1403 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-24 15:11:27,112 INFO L231 Difference]: Finished difference. Result has 123 places, 92 transitions, 965 flow [2023-08-24 15:11:27,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=965, PETRI_PLACES=123, PETRI_TRANSITIONS=92} [2023-08-24 15:11:27,113 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-08-24 15:11:27,113 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 92 transitions, 965 flow [2023-08-24 15:11:27,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.888888888888886) internal successors, (1042), 18 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:27,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:27,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:27,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:27,319 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,SelfDestructingSolverStorable16 [2023-08-24 15:11:27,319 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:27,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:27,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1545341611, now seen corresponding path program 2 times [2023-08-24 15:11:27,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:27,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602175769] [2023-08-24 15:11:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:27,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:27,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:27,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602175769] [2023-08-24 15:11:27,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602175769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:27,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929336973] [2023-08-24 15:11:27,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:11:27,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:27,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:27,477 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:27,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 15:11:27,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:27,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:27,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:27,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:27,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:27,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:27,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:27,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929336973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:27,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:27,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 15:11:27,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789350988] [2023-08-24 15:11:27,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:27,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:27,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:27,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:27,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:27,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:27,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 92 transitions, 965 flow. Second operand has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:27,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:27,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:27,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:28,410 INFO L124 PetriNetUnfolderBase]: 233/468 cut-off events. [2023-08-24 15:11:28,411 INFO L125 PetriNetUnfolderBase]: For 3140/3140 co-relation queries the response was YES. [2023-08-24 15:11:28,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2665 conditions, 468 events. 233/468 cut-off events. For 3140/3140 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2164 event pairs, 6 based on Foata normal form. 2/470 useless extension candidates. Maximal degree in co-relation 2617. Up to 115 conditions per place. [2023-08-24 15:11:28,415 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 91 selfloop transitions, 73 changer transitions 11/175 dead transitions. [2023-08-24 15:11:28,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 175 transitions, 1810 flow [2023-08-24 15:11:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 15:11:28,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 15:11:28,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1406 transitions. [2023-08-24 15:11:28,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869014859658778 [2023-08-24 15:11:28,419 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1406 transitions. [2023-08-24 15:11:28,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1406 transitions. [2023-08-24 15:11:28,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:28,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1406 transitions. [2023-08-24 15:11:28,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 61.130434782608695) internal successors, (1406), 23 states have internal predecessors, (1406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:28,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:28,425 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:28,425 INFO L175 Difference]: Start difference. First operand has 123 places, 92 transitions, 965 flow. Second operand 23 states and 1406 transitions. [2023-08-24 15:11:28,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 175 transitions, 1810 flow [2023-08-24 15:11:28,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 175 transitions, 1618 flow, removed 55 selfloop flow, removed 16 redundant places. [2023-08-24 15:11:28,439 INFO L231 Difference]: Finished difference. Result has 127 places, 117 transitions, 1275 flow [2023-08-24 15:11:28,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=842, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1275, PETRI_PLACES=127, PETRI_TRANSITIONS=117} [2023-08-24 15:11:28,439 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 107 predicate places. [2023-08-24 15:11:28,440 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 117 transitions, 1275 flow [2023-08-24 15:11:28,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:28,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:28,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:28,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:28,645 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,SelfDestructingSolverStorable17 [2023-08-24 15:11:28,645 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:28,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:28,646 INFO L85 PathProgramCache]: Analyzing trace with hash -2123017817, now seen corresponding path program 3 times [2023-08-24 15:11:28,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:28,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110302635] [2023-08-24 15:11:28,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:28,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110302635] [2023-08-24 15:11:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110302635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:28,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731567111] [2023-08-24 15:11:28,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:11:28,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:28,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:28,821 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:28,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 15:11:28,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:11:28,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:28,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:28,899 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:29,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:29,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731567111] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:29,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-24 15:11:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345189638] [2023-08-24 15:11:29,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:29,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:29,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:29,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:29,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 117 transitions, 1275 flow. Second operand has 20 states, 20 states have (on average 52.85) internal successors, (1057), 20 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:29,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:29,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:29,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:29,526 INFO L124 PetriNetUnfolderBase]: 229/451 cut-off events. [2023-08-24 15:11:29,526 INFO L125 PetriNetUnfolderBase]: For 2388/2388 co-relation queries the response was YES. [2023-08-24 15:11:29,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2611 conditions, 451 events. 229/451 cut-off events. For 2388/2388 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2038 event pairs, 2 based on Foata normal form. 3/454 useless extension candidates. Maximal degree in co-relation 2567. Up to 113 conditions per place. [2023-08-24 15:11:29,529 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 86 selfloop transitions, 62 changer transitions 29/177 dead transitions. [2023-08-24 15:11:29,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 177 transitions, 1865 flow [2023-08-24 15:11:29,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:11:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:11:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1186 transitions. [2023-08-24 15:11:29,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574442435201929 [2023-08-24 15:11:29,533 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1186 transitions. [2023-08-24 15:11:29,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1186 transitions. [2023-08-24 15:11:29,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:29,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1186 transitions. [2023-08-24 15:11:29,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 56.476190476190474) internal successors, (1186), 21 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:29,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:29,539 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:29,539 INFO L175 Difference]: Start difference. First operand has 127 places, 117 transitions, 1275 flow. Second operand 21 states and 1186 transitions. [2023-08-24 15:11:29,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 177 transitions, 1865 flow [2023-08-24 15:11:29,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 177 transitions, 1559 flow, removed 107 selfloop flow, removed 8 redundant places. [2023-08-24 15:11:29,555 INFO L231 Difference]: Finished difference. Result has 138 places, 111 transitions, 1096 flow [2023-08-24 15:11:29,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1096, PETRI_PLACES=138, PETRI_TRANSITIONS=111} [2023-08-24 15:11:29,556 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 118 predicate places. [2023-08-24 15:11:29,556 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 111 transitions, 1096 flow [2023-08-24 15:11:29,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 52.85) internal successors, (1057), 20 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:29,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:29,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:29,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:29,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:29,761 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:29,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:29,762 INFO L85 PathProgramCache]: Analyzing trace with hash -526516953, now seen corresponding path program 4 times [2023-08-24 15:11:29,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:29,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842197021] [2023-08-24 15:11:29,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:29,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:29,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842197021] [2023-08-24 15:11:29,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842197021] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:29,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049739798] [2023-08-24 15:11:29,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:11:29,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:29,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:29,910 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:29,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 15:11:29,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:11:29,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:29,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 15:11:29,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:30,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:30,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049739798] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:30,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 15:11:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972561116] [2023-08-24 15:11:30,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:30,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 15:11:30,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 15:11:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2023-08-24 15:11:30,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:30,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 111 transitions, 1096 flow. Second operand has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:30,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:30,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:30,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:30,637 INFO L124 PetriNetUnfolderBase]: 192/373 cut-off events. [2023-08-24 15:11:30,638 INFO L125 PetriNetUnfolderBase]: For 1230/1230 co-relation queries the response was YES. [2023-08-24 15:11:30,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 373 events. 192/373 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1551 event pairs, 10 based on Foata normal form. 2/375 useless extension candidates. Maximal degree in co-relation 1950. Up to 91 conditions per place. [2023-08-24 15:11:30,641 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 72 selfloop transitions, 60 changer transitions 19/151 dead transitions. [2023-08-24 15:11:30,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 151 transitions, 1494 flow [2023-08-24 15:11:30,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:11:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:11:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1220 transitions. [2023-08-24 15:11:30,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860759493670886 [2023-08-24 15:11:30,644 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1220 transitions. [2023-08-24 15:11:30,644 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1220 transitions. [2023-08-24 15:11:30,644 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:30,644 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1220 transitions. [2023-08-24 15:11:30,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 61.0) internal successors, (1220), 20 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:30,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:30,649 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:30,649 INFO L175 Difference]: Start difference. First operand has 138 places, 111 transitions, 1096 flow. Second operand 20 states and 1220 transitions. [2023-08-24 15:11:30,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 151 transitions, 1494 flow [2023-08-24 15:11:30,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1316 flow, removed 20 selfloop flow, removed 17 redundant places. [2023-08-24 15:11:30,659 INFO L231 Difference]: Finished difference. Result has 129 places, 104 transitions, 994 flow [2023-08-24 15:11:30,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=994, PETRI_PLACES=129, PETRI_TRANSITIONS=104} [2023-08-24 15:11:30,660 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 109 predicate places. [2023-08-24 15:11:30,660 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 104 transitions, 994 flow [2023-08-24 15:11:30,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 57.68421052631579) internal successors, (1096), 19 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:30,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:30,661 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:30,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:30,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:30,866 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:30,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:30,866 INFO L85 PathProgramCache]: Analyzing trace with hash -91998165, now seen corresponding path program 11 times [2023-08-24 15:11:30,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:30,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758023762] [2023-08-24 15:11:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:31,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:31,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:31,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758023762] [2023-08-24 15:11:31,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758023762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:31,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034869598] [2023-08-24 15:11:31,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:11:31,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:31,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:31,053 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:31,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 15:11:31,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:11:31,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:31,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:31,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:31,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:31,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034869598] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:31,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:31,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 15:11:31,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014715758] [2023-08-24 15:11:31,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:31,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 15:11:31,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:31,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 15:11:31,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-08-24 15:11:31,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:31,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 104 transitions, 994 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:31,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:31,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:31,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:33,189 INFO L124 PetriNetUnfolderBase]: 411/776 cut-off events. [2023-08-24 15:11:33,189 INFO L125 PetriNetUnfolderBase]: For 3099/3099 co-relation queries the response was YES. [2023-08-24 15:11:33,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3787 conditions, 776 events. 411/776 cut-off events. For 3099/3099 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3755 event pairs, 8 based on Foata normal form. 4/780 useless extension candidates. Maximal degree in co-relation 3745. Up to 221 conditions per place. [2023-08-24 15:11:33,195 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 133 selfloop transitions, 151 changer transitions 16/300 dead transitions. [2023-08-24 15:11:33,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 300 transitions, 2700 flow [2023-08-24 15:11:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 15:11:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 15:11:33,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2859 transitions. [2023-08-24 15:11:33,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38499865338001615 [2023-08-24 15:11:33,201 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2859 transitions. [2023-08-24 15:11:33,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2859 transitions. [2023-08-24 15:11:33,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:33,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2859 transitions. [2023-08-24 15:11:33,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 60.829787234042556) internal successors, (2859), 47 states have internal predecessors, (2859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:33,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:33,212 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 158.0) internal successors, (7584), 48 states have internal predecessors, (7584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:33,212 INFO L175 Difference]: Start difference. First operand has 129 places, 104 transitions, 994 flow. Second operand 47 states and 2859 transitions. [2023-08-24 15:11:33,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 300 transitions, 2700 flow [2023-08-24 15:11:33,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 300 transitions, 2485 flow, removed 4 selfloop flow, removed 18 redundant places. [2023-08-24 15:11:33,229 INFO L231 Difference]: Finished difference. Result has 162 places, 182 transitions, 1953 flow [2023-08-24 15:11:33,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1953, PETRI_PLACES=162, PETRI_TRANSITIONS=182} [2023-08-24 15:11:33,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 142 predicate places. [2023-08-24 15:11:33,230 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 182 transitions, 1953 flow [2023-08-24 15:11:33,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:33,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:33,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:33,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:33,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:33,436 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:33,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:33,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1117070417, now seen corresponding path program 12 times [2023-08-24 15:11:33,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:33,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147157152] [2023-08-24 15:11:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:33,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:33,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:33,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147157152] [2023-08-24 15:11:33,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147157152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:33,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897045147] [2023-08-24 15:11:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:11:33,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:33,668 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:33,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 15:11:33,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:11:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:33,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:33,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:33,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:34,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:34,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897045147] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:34,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:34,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 15:11:34,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352162510] [2023-08-24 15:11:34,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:34,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:11:34,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:34,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:11:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:11:34,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:34,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 1953 flow. Second operand has 25 states, 25 states have (on average 52.84) internal successors, (1321), 25 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:34,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:34,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:34,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:34,905 INFO L124 PetriNetUnfolderBase]: 481/937 cut-off events. [2023-08-24 15:11:34,906 INFO L125 PetriNetUnfolderBase]: For 4870/4870 co-relation queries the response was YES. [2023-08-24 15:11:34,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5117 conditions, 937 events. 481/937 cut-off events. For 4870/4870 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4876 event pairs, 42 based on Foata normal form. 3/936 useless extension candidates. Maximal degree in co-relation 5065. Up to 329 conditions per place. [2023-08-24 15:11:34,914 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 149 selfloop transitions, 104 changer transitions 33/286 dead transitions. [2023-08-24 15:11:34,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 286 transitions, 3073 flow [2023-08-24 15:11:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 15:11:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 15:11:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1369 transitions. [2023-08-24 15:11:34,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36102320675105487 [2023-08-24 15:11:34,916 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1369 transitions. [2023-08-24 15:11:34,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1369 transitions. [2023-08-24 15:11:34,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:34,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1369 transitions. [2023-08-24 15:11:34,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 57.041666666666664) internal successors, (1369), 24 states have internal predecessors, (1369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:34,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:34,922 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 158.0) internal successors, (3950), 25 states have internal predecessors, (3950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:34,922 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 1953 flow. Second operand 24 states and 1369 transitions. [2023-08-24 15:11:34,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 286 transitions, 3073 flow [2023-08-24 15:11:34,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 286 transitions, 2405 flow, removed 252 selfloop flow, removed 20 redundant places. [2023-08-24 15:11:34,956 INFO L231 Difference]: Finished difference. Result has 163 places, 194 transitions, 1702 flow [2023-08-24 15:11:34,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1702, PETRI_PLACES=163, PETRI_TRANSITIONS=194} [2023-08-24 15:11:34,957 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-08-24 15:11:34,957 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 194 transitions, 1702 flow [2023-08-24 15:11:34,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.84) internal successors, (1321), 25 states have internal predecessors, (1321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:34,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:34,958 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:34,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:35,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 15:11:35,163 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:35,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash -166177755, now seen corresponding path program 13 times [2023-08-24 15:11:35,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:35,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307235026] [2023-08-24 15:11:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:35,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:35,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:35,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:35,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307235026] [2023-08-24 15:11:35,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307235026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:35,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110132394] [2023-08-24 15:11:35,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:11:35,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:35,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:35,343 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:35,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 15:11:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:35,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:35,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:35,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:35,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:35,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110132394] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:35,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:35,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 15:11:35,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868683384] [2023-08-24 15:11:35,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:35,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 15:11:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:35,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 15:11:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-08-24 15:11:35,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:35,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 194 transitions, 1702 flow. Second operand has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:35,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:35,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:35,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:37,235 INFO L124 PetriNetUnfolderBase]: 546/1053 cut-off events. [2023-08-24 15:11:37,236 INFO L125 PetriNetUnfolderBase]: For 2036/2036 co-relation queries the response was YES. [2023-08-24 15:11:37,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4947 conditions, 1053 events. 546/1053 cut-off events. For 2036/2036 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5628 event pairs, 42 based on Foata normal form. 4/1049 useless extension candidates. Maximal degree in co-relation 4903. Up to 459 conditions per place. [2023-08-24 15:11:37,244 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 150 selfloop transitions, 137 changer transitions 42/329 dead transitions. [2023-08-24 15:11:37,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 329 transitions, 3027 flow [2023-08-24 15:11:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 15:11:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 15:11:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2379 transitions. [2023-08-24 15:11:37,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3860759493670886 [2023-08-24 15:11:37,252 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2379 transitions. [2023-08-24 15:11:37,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2379 transitions. [2023-08-24 15:11:37,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:37,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2379 transitions. [2023-08-24 15:11:37,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 61.0) internal successors, (2379), 39 states have internal predecessors, (2379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:37,265 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 158.0) internal successors, (6320), 40 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:37,266 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 158.0) internal successors, (6320), 40 states have internal predecessors, (6320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:37,266 INFO L175 Difference]: Start difference. First operand has 163 places, 194 transitions, 1702 flow. Second operand 39 states and 2379 transitions. [2023-08-24 15:11:37,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 329 transitions, 3027 flow [2023-08-24 15:11:37,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 329 transitions, 2846 flow, removed 6 selfloop flow, removed 9 redundant places. [2023-08-24 15:11:37,288 INFO L231 Difference]: Finished difference. Result has 195 places, 224 transitions, 2091 flow [2023-08-24 15:11:37,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1540, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2091, PETRI_PLACES=195, PETRI_TRANSITIONS=224} [2023-08-24 15:11:37,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 175 predicate places. [2023-08-24 15:11:37,290 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 224 transitions, 2091 flow [2023-08-24 15:11:37,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:37,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:37,290 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:37,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:37,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:37,495 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:37,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:37,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1903450577, now seen corresponding path program 14 times [2023-08-24 15:11:37,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:37,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432644361] [2023-08-24 15:11:37,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:37,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:37,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432644361] [2023-08-24 15:11:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432644361] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:37,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246234549] [2023-08-24 15:11:37,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:11:37,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:37,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:37,632 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:37,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 15:11:37,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:37,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:37,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:37,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:37,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:38,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246234549] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:38,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:38,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 15:11:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902066863] [2023-08-24 15:11:38,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:38,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 15:11:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 15:11:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-24 15:11:38,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:38,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 224 transitions, 2091 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:38,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:38,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:38,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:39,000 INFO L124 PetriNetUnfolderBase]: 595/1126 cut-off events. [2023-08-24 15:11:39,000 INFO L125 PetriNetUnfolderBase]: For 2433/2433 co-relation queries the response was YES. [2023-08-24 15:11:39,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5480 conditions, 1126 events. 595/1126 cut-off events. For 2433/2433 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5996 event pairs, 50 based on Foata normal form. 4/1122 useless extension candidates. Maximal degree in co-relation 5426. Up to 539 conditions per place. [2023-08-24 15:11:39,008 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 118 selfloop transitions, 135 changer transitions 62/315 dead transitions. [2023-08-24 15:11:39,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 315 transitions, 3129 flow [2023-08-24 15:11:39,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 15:11:39,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 15:11:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1933 transitions. [2023-08-24 15:11:39,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38231803797468356 [2023-08-24 15:11:39,011 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1933 transitions. [2023-08-24 15:11:39,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1933 transitions. [2023-08-24 15:11:39,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:39,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1933 transitions. [2023-08-24 15:11:39,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 60.40625) internal successors, (1933), 32 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:39,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:39,018 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:39,018 INFO L175 Difference]: Start difference. First operand has 195 places, 224 transitions, 2091 flow. Second operand 32 states and 1933 transitions. [2023-08-24 15:11:39,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 315 transitions, 3129 flow [2023-08-24 15:11:39,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 315 transitions, 2959 flow, removed 16 selfloop flow, removed 20 redundant places. [2023-08-24 15:11:39,046 INFO L231 Difference]: Finished difference. Result has 205 places, 216 transitions, 2164 flow [2023-08-24 15:11:39,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1927, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2164, PETRI_PLACES=205, PETRI_TRANSITIONS=216} [2023-08-24 15:11:39,047 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-08-24 15:11:39,047 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 216 transitions, 2164 flow [2023-08-24 15:11:39,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:39,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:39,048 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:39,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:39,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:39,253 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:39,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:39,253 INFO L85 PathProgramCache]: Analyzing trace with hash 92220133, now seen corresponding path program 15 times [2023-08-24 15:11:39,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:39,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923245544] [2023-08-24 15:11:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:39,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:39,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:39,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923245544] [2023-08-24 15:11:39,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923245544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:39,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537701489] [2023-08-24 15:11:39,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:11:39,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:39,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:39,416 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:39,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 15:11:39,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:11:39,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:39,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:39,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:39,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:39,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537701489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:39,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:39,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 15:11:39,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265881202] [2023-08-24 15:11:39,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:39,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 15:11:39,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:39,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 15:11:39,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 15:11:39,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:39,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 216 transitions, 2164 flow. Second operand has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:39,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:39,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:39,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:41,225 INFO L124 PetriNetUnfolderBase]: 642/1186 cut-off events. [2023-08-24 15:11:41,226 INFO L125 PetriNetUnfolderBase]: For 2881/2881 co-relation queries the response was YES. [2023-08-24 15:11:41,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6042 conditions, 1186 events. 642/1186 cut-off events. For 2881/2881 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6273 event pairs, 42 based on Foata normal form. 7/1185 useless extension candidates. Maximal degree in co-relation 5987. Up to 483 conditions per place. [2023-08-24 15:11:41,235 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 146 selfloop transitions, 157 changer transitions 32/335 dead transitions. [2023-08-24 15:11:41,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 335 transitions, 3459 flow [2023-08-24 15:11:41,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 15:11:41,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 15:11:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2012 transitions. [2023-08-24 15:11:41,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38588415803605675 [2023-08-24 15:11:41,237 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2012 transitions. [2023-08-24 15:11:41,237 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2012 transitions. [2023-08-24 15:11:41,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:41,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2012 transitions. [2023-08-24 15:11:41,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.96969696969697) internal successors, (2012), 33 states have internal predecessors, (2012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:41,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 158.0) internal successors, (5372), 34 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:41,244 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 158.0) internal successors, (5372), 34 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:41,244 INFO L175 Difference]: Start difference. First operand has 205 places, 216 transitions, 2164 flow. Second operand 33 states and 2012 transitions. [2023-08-24 15:11:41,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 335 transitions, 3459 flow [2023-08-24 15:11:41,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 335 transitions, 3243 flow, removed 31 selfloop flow, removed 25 redundant places. [2023-08-24 15:11:41,276 INFO L231 Difference]: Finished difference. Result has 194 places, 239 transitions, 2586 flow [2023-08-24 15:11:41,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=1941, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2586, PETRI_PLACES=194, PETRI_TRANSITIONS=239} [2023-08-24 15:11:41,276 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-08-24 15:11:41,276 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 239 transitions, 2586 flow [2023-08-24 15:11:41,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.875) internal successors, (1389), 24 states have internal predecessors, (1389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:41,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:41,277 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:41,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-24 15:11:41,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:41,482 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:41,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:41,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1785092975, now seen corresponding path program 5 times [2023-08-24 15:11:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:41,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762866189] [2023-08-24 15:11:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:41,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:41,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:41,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762866189] [2023-08-24 15:11:41,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762866189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:41,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384718101] [2023-08-24 15:11:41,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:11:41,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:41,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:41,628 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:41,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 15:11:41,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:11:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:41,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 15:11:41,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:41,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384718101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:41,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:41,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 15:11:41,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136527108] [2023-08-24 15:11:41,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:41,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:41,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:41,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:41,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:41,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:41,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 239 transitions, 2586 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:41,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:41,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:41,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:42,736 INFO L124 PetriNetUnfolderBase]: 707/1354 cut-off events. [2023-08-24 15:11:42,737 INFO L125 PetriNetUnfolderBase]: For 4860/4860 co-relation queries the response was YES. [2023-08-24 15:11:42,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7361 conditions, 1354 events. 707/1354 cut-off events. For 4860/4860 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7670 event pairs, 42 based on Foata normal form. 12/1358 useless extension candidates. Maximal degree in co-relation 7308. Up to 419 conditions per place. [2023-08-24 15:11:42,747 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 185 selfloop transitions, 195 changer transitions 31/411 dead transitions. [2023-08-24 15:11:42,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 411 transitions, 4615 flow [2023-08-24 15:11:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 15:11:42,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 15:11:42,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1759 transitions. [2023-08-24 15:11:42,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38389349628982977 [2023-08-24 15:11:42,751 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1759 transitions. [2023-08-24 15:11:42,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1759 transitions. [2023-08-24 15:11:42,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:42,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1759 transitions. [2023-08-24 15:11:42,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.6551724137931) internal successors, (1759), 29 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:42,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 158.0) internal successors, (4740), 30 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:42,758 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 158.0) internal successors, (4740), 30 states have internal predecessors, (4740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:42,758 INFO L175 Difference]: Start difference. First operand has 194 places, 239 transitions, 2586 flow. Second operand 29 states and 1759 transitions. [2023-08-24 15:11:42,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 411 transitions, 4615 flow [2023-08-24 15:11:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 411 transitions, 4399 flow, removed 58 selfloop flow, removed 18 redundant places. [2023-08-24 15:11:42,803 INFO L231 Difference]: Finished difference. Result has 205 places, 314 transitions, 3666 flow [2023-08-24 15:11:42,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=2436, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3666, PETRI_PLACES=205, PETRI_TRANSITIONS=314} [2023-08-24 15:11:42,805 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 185 predicate places. [2023-08-24 15:11:42,805 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 314 transitions, 3666 flow [2023-08-24 15:11:42,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:42,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:42,806 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:42,815 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:43,010 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,SelfDestructingSolverStorable25 [2023-08-24 15:11:43,011 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:43,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash 322753749, now seen corresponding path program 6 times [2023-08-24 15:11:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474773492] [2023-08-24 15:11:43,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:43,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:43,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:43,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474773492] [2023-08-24 15:11:43,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474773492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:43,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859713641] [2023-08-24 15:11:43,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:11:43,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:43,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:43,209 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:43,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 15:11:43,272 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 15:11:43,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:43,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 15:11:43,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:43,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:43,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:43,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:43,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859713641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:43,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:43,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 19 [2023-08-24 15:11:43,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685106946] [2023-08-24 15:11:43,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:43,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:11:43,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:11:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:11:43,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:43,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 314 transitions, 3666 flow. Second operand has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:43,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:43,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:43,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:44,098 INFO L124 PetriNetUnfolderBase]: 704/1344 cut-off events. [2023-08-24 15:11:44,098 INFO L125 PetriNetUnfolderBase]: For 6115/6115 co-relation queries the response was YES. [2023-08-24 15:11:44,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8072 conditions, 1344 events. 704/1344 cut-off events. For 6115/6115 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 7603 event pairs, 18 based on Foata normal form. 9/1353 useless extension candidates. Maximal degree in co-relation 8012. Up to 671 conditions per place. [2023-08-24 15:11:44,106 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 235 selfloop transitions, 93 changer transitions 62/390 dead transitions. [2023-08-24 15:11:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 390 transitions, 4917 flow [2023-08-24 15:11:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-24 15:11:44,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-24 15:11:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1279 transitions. [2023-08-24 15:11:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519537699504678 [2023-08-24 15:11:44,108 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1279 transitions. [2023-08-24 15:11:44,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1279 transitions. [2023-08-24 15:11:44,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:44,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1279 transitions. [2023-08-24 15:11:44,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 55.608695652173914) internal successors, (1279), 23 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:44,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:44,113 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 158.0) internal successors, (3792), 24 states have internal predecessors, (3792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:44,113 INFO L175 Difference]: Start difference. First operand has 205 places, 314 transitions, 3666 flow. Second operand 23 states and 1279 transitions. [2023-08-24 15:11:44,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 390 transitions, 4917 flow [2023-08-24 15:11:44,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 390 transitions, 4566 flow, removed 123 selfloop flow, removed 12 redundant places. [2023-08-24 15:11:44,179 INFO L231 Difference]: Finished difference. Result has 220 places, 295 transitions, 3348 flow [2023-08-24 15:11:44,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3331, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=3348, PETRI_PLACES=220, PETRI_TRANSITIONS=295} [2023-08-24 15:11:44,180 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-08-24 15:11:44,180 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 295 transitions, 3348 flow [2023-08-24 15:11:44,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.76190476190476) internal successors, (1108), 21 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:44,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:44,180 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:44,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:44,385 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,SelfDestructingSolverStorable26 [2023-08-24 15:11:44,385 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:44,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:44,385 INFO L85 PathProgramCache]: Analyzing trace with hash -97330651, now seen corresponding path program 16 times [2023-08-24 15:11:44,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:44,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250358591] [2023-08-24 15:11:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:44,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:44,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:44,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250358591] [2023-08-24 15:11:44,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250358591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:44,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227349406] [2023-08-24 15:11:44,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:11:44,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:44,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:44,564 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:44,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 15:11:44,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:11:44,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:44,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:44,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:44,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:44,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227349406] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:44,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:44,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-24 15:11:44,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119254781] [2023-08-24 15:11:44,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:11:44,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:44,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:11:44,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:11:44,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:45,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 295 transitions, 3348 flow. Second operand has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:45,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:45,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:45,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:45,579 INFO L124 PetriNetUnfolderBase]: 614/1211 cut-off events. [2023-08-24 15:11:45,579 INFO L125 PetriNetUnfolderBase]: For 4994/4994 co-relation queries the response was YES. [2023-08-24 15:11:45,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7048 conditions, 1211 events. 614/1211 cut-off events. For 4994/4994 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6897 event pairs, 31 based on Foata normal form. 4/1213 useless extension candidates. Maximal degree in co-relation 6983. Up to 1126 conditions per place. [2023-08-24 15:11:45,586 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 288 selfloop transitions, 18 changer transitions 33/339 dead transitions. [2023-08-24 15:11:45,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 339 transitions, 4213 flow [2023-08-24 15:11:45,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 15:11:45,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 15:11:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1312 transitions. [2023-08-24 15:11:45,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37744533947065595 [2023-08-24 15:11:45,587 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1312 transitions. [2023-08-24 15:11:45,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1312 transitions. [2023-08-24 15:11:45,588 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:45,588 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1312 transitions. [2023-08-24 15:11:45,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 59.63636363636363) internal successors, (1312), 22 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:45,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:45,591 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 158.0) internal successors, (3634), 23 states have internal predecessors, (3634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:45,591 INFO L175 Difference]: Start difference. First operand has 220 places, 295 transitions, 3348 flow. Second operand 22 states and 1312 transitions. [2023-08-24 15:11:45,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 339 transitions, 4213 flow [2023-08-24 15:11:45,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 339 transitions, 4004 flow, removed 22 selfloop flow, removed 24 redundant places. [2023-08-24 15:11:45,634 INFO L231 Difference]: Finished difference. Result has 212 places, 294 transitions, 3207 flow [2023-08-24 15:11:45,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3149, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3207, PETRI_PLACES=212, PETRI_TRANSITIONS=294} [2023-08-24 15:11:45,634 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2023-08-24 15:11:45,634 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 294 transitions, 3207 flow [2023-08-24 15:11:45,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:45,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:45,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:45,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-24 15:11:45,839 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,SelfDestructingSolverStorable27 [2023-08-24 15:11:45,840 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:45,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:45,840 INFO L85 PathProgramCache]: Analyzing trace with hash 898903303, now seen corresponding path program 17 times [2023-08-24 15:11:45,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:45,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876103404] [2023-08-24 15:11:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:45,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:46,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:46,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:46,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876103404] [2023-08-24 15:11:46,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876103404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:46,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329585381] [2023-08-24 15:11:46,029 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:11:46,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:46,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:46,030 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:46,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 15:11:46,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:11:46,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:46,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:46,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:46,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329585381] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:46,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:46,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 15:11:46,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395181934] [2023-08-24 15:11:46,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:46,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:11:46,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:11:46,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:11:46,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:11:46,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 294 transitions, 3207 flow. Second operand has 25 states, 25 states have (on average 52.76) internal successors, (1319), 25 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:46,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:46,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:11:46,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:47,625 INFO L124 PetriNetUnfolderBase]: 675/1318 cut-off events. [2023-08-24 15:11:47,626 INFO L125 PetriNetUnfolderBase]: For 3945/3945 co-relation queries the response was YES. [2023-08-24 15:11:47,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7091 conditions, 1318 events. 675/1318 cut-off events. For 3945/3945 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 7591 event pairs, 33 based on Foata normal form. 6/1322 useless extension candidates. Maximal degree in co-relation 7029. Up to 1088 conditions per place. [2023-08-24 15:11:47,636 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 295 selfloop transitions, 56 changer transitions 38/389 dead transitions. [2023-08-24 15:11:47,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 389 transitions, 4619 flow [2023-08-24 15:11:47,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-24 15:11:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-24 15:11:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1758 transitions. [2023-08-24 15:11:47,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34770569620253167 [2023-08-24 15:11:47,639 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1758 transitions. [2023-08-24 15:11:47,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1758 transitions. [2023-08-24 15:11:47,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:47,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1758 transitions. [2023-08-24 15:11:47,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 54.9375) internal successors, (1758), 32 states have internal predecessors, (1758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:47,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:47,648 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 158.0) internal successors, (5214), 33 states have internal predecessors, (5214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:47,648 INFO L175 Difference]: Start difference. First operand has 212 places, 294 transitions, 3207 flow. Second operand 32 states and 1758 transitions. [2023-08-24 15:11:47,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 389 transitions, 4619 flow [2023-08-24 15:11:47,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 389 transitions, 4526 flow, removed 30 selfloop flow, removed 17 redundant places. [2023-08-24 15:11:47,691 INFO L231 Difference]: Finished difference. Result has 220 places, 317 transitions, 3574 flow [2023-08-24 15:11:47,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3148, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=3574, PETRI_PLACES=220, PETRI_TRANSITIONS=317} [2023-08-24 15:11:47,692 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 200 predicate places. [2023-08-24 15:11:47,692 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 317 transitions, 3574 flow [2023-08-24 15:11:47,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 52.76) internal successors, (1319), 25 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:47,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:47,692 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:47,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-08-24 15:11:47,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:47,894 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:47,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash 2083075115, now seen corresponding path program 18 times [2023-08-24 15:11:47,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:47,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762840739] [2023-08-24 15:11:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:47,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:48,046 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:48,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:48,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762840739] [2023-08-24 15:11:48,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762840739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:48,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683008661] [2023-08-24 15:11:48,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:11:48,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:48,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:48,049 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:48,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 15:11:48,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:11:48,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:48,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:48,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:48,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:48,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:48,461 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:48,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683008661] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:48,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:48,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 15:11:48,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017704391] [2023-08-24 15:11:48,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:48,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 15:11:48,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:48,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 15:11:48,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-08-24 15:11:48,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:48,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 317 transitions, 3574 flow. Second operand has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:48,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:48,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:48,821 INFO L124 PetriNetUnfolderBase]: 643/1253 cut-off events. [2023-08-24 15:11:48,821 INFO L125 PetriNetUnfolderBase]: For 3938/3938 co-relation queries the response was YES. [2023-08-24 15:11:48,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6951 conditions, 1253 events. 643/1253 cut-off events. For 3938/3938 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7089 event pairs, 33 based on Foata normal form. 3/1254 useless extension candidates. Maximal degree in co-relation 6891. Up to 1192 conditions per place. [2023-08-24 15:11:48,829 INFO L140 encePairwiseOnDemand]: 151/158 looper letters, 307 selfloop transitions, 6 changer transitions 33/346 dead transitions. [2023-08-24 15:11:48,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 346 transitions, 4403 flow [2023-08-24 15:11:48,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 15:11:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 15:11:48,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 840 transitions. [2023-08-24 15:11:48,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.379746835443038 [2023-08-24 15:11:48,842 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 840 transitions. [2023-08-24 15:11:48,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 840 transitions. [2023-08-24 15:11:48,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:48,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 840 transitions. [2023-08-24 15:11:48,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 60.0) internal successors, (840), 14 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:48,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:48,847 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 158.0) internal successors, (2370), 15 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:48,848 INFO L175 Difference]: Start difference. First operand has 220 places, 317 transitions, 3574 flow. Second operand 14 states and 840 transitions. [2023-08-24 15:11:48,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 346 transitions, 4403 flow [2023-08-24 15:11:48,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 346 transitions, 4061 flow, removed 126 selfloop flow, removed 26 redundant places. [2023-08-24 15:11:48,898 INFO L231 Difference]: Finished difference. Result has 200 places, 309 transitions, 3177 flow [2023-08-24 15:11:48,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3177, PETRI_PLACES=200, PETRI_TRANSITIONS=309} [2023-08-24 15:11:48,899 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-24 15:11:48,899 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 309 transitions, 3177 flow [2023-08-24 15:11:48,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.833333333333336) internal successors, (1388), 24 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:48,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:48,900 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:48,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:49,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:49,105 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:49,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash 798658203, now seen corresponding path program 7 times [2023-08-24 15:11:49,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:49,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726178010] [2023-08-24 15:11:49,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:49,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:49,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:49,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726178010] [2023-08-24 15:11:49,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726178010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:49,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433513202] [2023-08-24 15:11:49,255 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:11:49,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:49,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:49,257 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:49,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 15:11:49,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:49,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 15:11:49,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:49,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:49,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:49,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433513202] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:49,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:49,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 15:11:49,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6760414] [2023-08-24 15:11:49,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:49,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:49,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:49,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:49,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:49,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:49,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 309 transitions, 3177 flow. Second operand has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:49,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:49,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:49,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:50,201 INFO L124 PetriNetUnfolderBase]: 659/1285 cut-off events. [2023-08-24 15:11:50,201 INFO L125 PetriNetUnfolderBase]: For 3617/3617 co-relation queries the response was YES. [2023-08-24 15:11:50,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6607 conditions, 1285 events. 659/1285 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7357 event pairs, 33 based on Foata normal form. 9/1286 useless extension candidates. Maximal degree in co-relation 6555. Up to 1052 conditions per place. [2023-08-24 15:11:50,209 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 319 selfloop transitions, 67 changer transitions 17/403 dead transitions. [2023-08-24 15:11:50,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 403 transitions, 4502 flow [2023-08-24 15:11:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-24 15:11:50,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-24 15:11:50,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1630 transitions. [2023-08-24 15:11:50,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3820909517112049 [2023-08-24 15:11:50,219 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1630 transitions. [2023-08-24 15:11:50,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1630 transitions. [2023-08-24 15:11:50,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:50,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1630 transitions. [2023-08-24 15:11:50,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.370370370370374) internal successors, (1630), 27 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:50,223 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 158.0) internal successors, (4424), 28 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:50,224 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 158.0) internal successors, (4424), 28 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:50,224 INFO L175 Difference]: Start difference. First operand has 200 places, 309 transitions, 3177 flow. Second operand 27 states and 1630 transitions. [2023-08-24 15:11:50,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 403 transitions, 4502 flow [2023-08-24 15:11:50,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 403 transitions, 4438 flow, removed 25 selfloop flow, removed 10 redundant places. [2023-08-24 15:11:50,266 INFO L231 Difference]: Finished difference. Result has 210 places, 336 transitions, 3577 flow [2023-08-24 15:11:50,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3129, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3577, PETRI_PLACES=210, PETRI_TRANSITIONS=336} [2023-08-24 15:11:50,267 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 190 predicate places. [2023-08-24 15:11:50,267 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 336 transitions, 3577 flow [2023-08-24 15:11:50,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.6) internal successors, (1152), 20 states have internal predecessors, (1152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:50,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:50,267 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:50,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:50,472 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,SelfDestructingSolverStorable30 [2023-08-24 15:11:50,473 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:50,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:50,473 INFO L85 PathProgramCache]: Analyzing trace with hash 723123603, now seen corresponding path program 8 times [2023-08-24 15:11:50,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:50,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610741639] [2023-08-24 15:11:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:50,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610741639] [2023-08-24 15:11:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610741639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:50,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525187823] [2023-08-24 15:11:50,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:11:50,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:50,614 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:50,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 15:11:50,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:50,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:50,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 15:11:50,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:50,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:50,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525187823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:50,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 15:11:50,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234667347] [2023-08-24 15:11:50,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:50,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:50,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:50,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:50,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:50,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:50,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 336 transitions, 3577 flow. Second operand has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:50,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:50,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:50,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:51,608 INFO L124 PetriNetUnfolderBase]: 660/1288 cut-off events. [2023-08-24 15:11:51,608 INFO L125 PetriNetUnfolderBase]: For 4557/4557 co-relation queries the response was YES. [2023-08-24 15:11:51,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6955 conditions, 1288 events. 660/1288 cut-off events. For 4557/4557 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 7406 event pairs, 35 based on Foata normal form. 7/1291 useless extension candidates. Maximal degree in co-relation 6902. Up to 1052 conditions per place. [2023-08-24 15:11:51,616 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 312 selfloop transitions, 63 changer transitions 19/394 dead transitions. [2023-08-24 15:11:51,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 394 transitions, 4633 flow [2023-08-24 15:11:51,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 15:11:51,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 15:11:51,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1507 transitions. [2023-08-24 15:11:51,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38151898734177214 [2023-08-24 15:11:51,618 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1507 transitions. [2023-08-24 15:11:51,618 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1507 transitions. [2023-08-24 15:11:51,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:51,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1507 transitions. [2023-08-24 15:11:51,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 60.28) internal successors, (1507), 25 states have internal predecessors, (1507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:51,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 158.0) internal successors, (4108), 26 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:51,623 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 158.0) internal successors, (4108), 26 states have internal predecessors, (4108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:51,623 INFO L175 Difference]: Start difference. First operand has 210 places, 336 transitions, 3577 flow. Second operand 25 states and 1507 transitions. [2023-08-24 15:11:51,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 394 transitions, 4633 flow [2023-08-24 15:11:51,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 394 transitions, 4385 flow, removed 110 selfloop flow, removed 10 redundant places. [2023-08-24 15:11:51,674 INFO L231 Difference]: Finished difference. Result has 226 places, 335 transitions, 3503 flow [2023-08-24 15:11:51,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3503, PETRI_PLACES=226, PETRI_TRANSITIONS=335} [2023-08-24 15:11:51,675 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 206 predicate places. [2023-08-24 15:11:51,675 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 335 transitions, 3503 flow [2023-08-24 15:11:51,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.7) internal successors, (1154), 20 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:51,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:51,675 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:51,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:51,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-24 15:11:51,880 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:51,881 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:51,881 INFO L85 PathProgramCache]: Analyzing trace with hash -148667421, now seen corresponding path program 9 times [2023-08-24 15:11:51,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:51,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082003257] [2023-08-24 15:11:51,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:51,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:51,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:52,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082003257] [2023-08-24 15:11:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082003257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:52,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470957545] [2023-08-24 15:11:52,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:11:52,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:52,017 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:52,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 15:11:52,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 15:11:52,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:52,085 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-24 15:11:52,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:52,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:52,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470957545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:52,329 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:52,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-08-24 15:11:52,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035168217] [2023-08-24 15:11:52,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:52,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:52,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:52,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:52,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:52,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:52,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 335 transitions, 3503 flow. Second operand has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:52,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:52,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:52,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:52,778 INFO L124 PetriNetUnfolderBase]: 658/1281 cut-off events. [2023-08-24 15:11:52,778 INFO L125 PetriNetUnfolderBase]: For 4571/4571 co-relation queries the response was YES. [2023-08-24 15:11:52,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6876 conditions, 1281 events. 658/1281 cut-off events. For 4571/4571 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 7365 event pairs, 16 based on Foata normal form. 10/1287 useless extension candidates. Maximal degree in co-relation 6820. Up to 1016 conditions per place. [2023-08-24 15:11:52,786 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 306 selfloop transitions, 36 changer transitions 45/387 dead transitions. [2023-08-24 15:11:52,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 387 transitions, 4532 flow [2023-08-24 15:11:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 15:11:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 15:11:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1153 transitions. [2023-08-24 15:11:52,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38407728181212525 [2023-08-24 15:11:52,789 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1153 transitions. [2023-08-24 15:11:52,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1153 transitions. [2023-08-24 15:11:52,789 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:52,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1153 transitions. [2023-08-24 15:11:52,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.68421052631579) internal successors, (1153), 19 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:52,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:52,792 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 158.0) internal successors, (3160), 20 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:52,792 INFO L175 Difference]: Start difference. First operand has 226 places, 335 transitions, 3503 flow. Second operand 19 states and 1153 transitions. [2023-08-24 15:11:52,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 387 transitions, 4532 flow [2023-08-24 15:11:52,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 387 transitions, 4386 flow, removed 12 selfloop flow, removed 21 redundant places. [2023-08-24 15:11:52,843 INFO L231 Difference]: Finished difference. Result has 221 places, 321 transitions, 3332 flow [2023-08-24 15:11:52,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3363, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3332, PETRI_PLACES=221, PETRI_TRANSITIONS=321} [2023-08-24 15:11:52,843 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 201 predicate places. [2023-08-24 15:11:52,844 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 321 transitions, 3332 flow [2023-08-24 15:11:52,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.65) internal successors, (1153), 20 states have internal predecessors, (1153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:52,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:52,844 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:52,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-24 15:11:53,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:53,049 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:53,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -820035049, now seen corresponding path program 19 times [2023-08-24 15:11:53,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:53,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236856329] [2023-08-24 15:11:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236856329] [2023-08-24 15:11:53,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236856329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643511628] [2023-08-24 15:11:53,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:11:53,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:53,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:53,224 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:53,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 15:11:53,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:53,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:53,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:53,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:53,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:53,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643511628] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:53,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:53,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-24 15:11:53,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794070453] [2023-08-24 15:11:53,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:53,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 15:11:53,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:53,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 15:11:53,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2023-08-24 15:11:53,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:53,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 321 transitions, 3332 flow. Second operand has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:53,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:53,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:53,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:54,883 INFO L124 PetriNetUnfolderBase]: 626/1251 cut-off events. [2023-08-24 15:11:54,883 INFO L125 PetriNetUnfolderBase]: For 4152/4152 co-relation queries the response was YES. [2023-08-24 15:11:54,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 1251 events. 626/1251 cut-off events. For 4152/4152 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7304 event pairs, 17 based on Foata normal form. 4/1251 useless extension candidates. Maximal degree in co-relation 6514. Up to 960 conditions per place. [2023-08-24 15:11:54,890 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 319 selfloop transitions, 80 changer transitions 27/426 dead transitions. [2023-08-24 15:11:54,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 426 transitions, 4701 flow [2023-08-24 15:11:54,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 15:11:54,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 15:11:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2162 transitions. [2023-08-24 15:11:54,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.380098452883263 [2023-08-24 15:11:54,892 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2162 transitions. [2023-08-24 15:11:54,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2162 transitions. [2023-08-24 15:11:54,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:54,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2162 transitions. [2023-08-24 15:11:54,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 60.05555555555556) internal successors, (2162), 36 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:54,897 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:54,897 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 158.0) internal successors, (5846), 37 states have internal predecessors, (5846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:54,897 INFO L175 Difference]: Start difference. First operand has 221 places, 321 transitions, 3332 flow. Second operand 36 states and 2162 transitions. [2023-08-24 15:11:54,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 426 transitions, 4701 flow [2023-08-24 15:11:54,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 426 transitions, 4500 flow, removed 40 selfloop flow, removed 17 redundant places. [2023-08-24 15:11:54,932 INFO L231 Difference]: Finished difference. Result has 234 places, 345 transitions, 3618 flow [2023-08-24 15:11:54,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3201, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3618, PETRI_PLACES=234, PETRI_TRANSITIONS=345} [2023-08-24 15:11:54,933 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 214 predicate places. [2023-08-24 15:11:54,933 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 345 transitions, 3618 flow [2023-08-24 15:11:54,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 57.92) internal successors, (1448), 25 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:54,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:54,933 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:54,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 15:11:55,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:55,134 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:55,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:55,134 INFO L85 PathProgramCache]: Analyzing trace with hash -895569649, now seen corresponding path program 20 times [2023-08-24 15:11:55,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:55,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355783527] [2023-08-24 15:11:55,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:55,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:55,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:55,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355783527] [2023-08-24 15:11:55,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355783527] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:55,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914092793] [2023-08-24 15:11:55,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:11:55,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:55,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:55,283 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:55,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 15:11:55,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:11:55,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:55,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:55,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:55,531 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:55,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914092793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:55,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:55,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-08-24 15:11:55,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921257188] [2023-08-24 15:11:55,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:55,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 15:11:55,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:55,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 15:11:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 15:11:55,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:55,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 345 transitions, 3618 flow. Second operand has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:55,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:55,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:55,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:56,635 INFO L124 PetriNetUnfolderBase]: 617/1212 cut-off events. [2023-08-24 15:11:56,635 INFO L125 PetriNetUnfolderBase]: For 3168/3168 co-relation queries the response was YES. [2023-08-24 15:11:56,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6371 conditions, 1212 events. 617/1212 cut-off events. For 3168/3168 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6892 event pairs, 19 based on Foata normal form. 4/1214 useless extension candidates. Maximal degree in co-relation 6314. Up to 960 conditions per place. [2023-08-24 15:11:56,640 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 299 selfloop transitions, 63 changer transitions 37/399 dead transitions. [2023-08-24 15:11:56,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 399 transitions, 4548 flow [2023-08-24 15:11:56,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 15:11:56,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 15:11:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1572 transitions. [2023-08-24 15:11:56,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38266796494644595 [2023-08-24 15:11:56,642 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1572 transitions. [2023-08-24 15:11:56,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1572 transitions. [2023-08-24 15:11:56,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:56,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1572 transitions. [2023-08-24 15:11:56,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.46153846153846) internal successors, (1572), 26 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:56,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:56,646 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:56,646 INFO L175 Difference]: Start difference. First operand has 234 places, 345 transitions, 3618 flow. Second operand 26 states and 1572 transitions. [2023-08-24 15:11:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 399 transitions, 4548 flow [2023-08-24 15:11:56,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 399 transitions, 4402 flow, removed 56 selfloop flow, removed 11 redundant places. [2023-08-24 15:11:56,692 INFO L231 Difference]: Finished difference. Result has 236 places, 337 transitions, 3532 flow [2023-08-24 15:11:56,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3443, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3532, PETRI_PLACES=236, PETRI_TRANSITIONS=337} [2023-08-24 15:11:56,693 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 216 predicate places. [2023-08-24 15:11:56,693 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 337 transitions, 3532 flow [2023-08-24 15:11:56,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 57.916666666666664) internal successors, (1390), 24 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:56,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:56,694 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:56,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:56,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:56,899 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:56,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:56,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1787808693, now seen corresponding path program 10 times [2023-08-24 15:11:56,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:56,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081323204] [2023-08-24 15:11:56,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:56,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:56,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:57,041 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:57,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:57,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081323204] [2023-08-24 15:11:57,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081323204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:57,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240554826] [2023-08-24 15:11:57,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:11:57,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:57,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:57,043 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:57,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 15:11:57,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:11:57,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:57,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:57,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:57,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:57,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240554826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:57,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:57,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2023-08-24 15:11:57,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245030077] [2023-08-24 15:11:57,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:57,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:11:57,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:57,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:11:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:11:57,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:57,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 337 transitions, 3532 flow. Second operand has 21 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:57,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:57,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:57,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:57,932 INFO L124 PetriNetUnfolderBase]: 595/1159 cut-off events. [2023-08-24 15:11:57,932 INFO L125 PetriNetUnfolderBase]: For 2999/2999 co-relation queries the response was YES. [2023-08-24 15:11:57,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6127 conditions, 1159 events. 595/1159 cut-off events. For 2999/2999 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6474 event pairs, 13 based on Foata normal form. 11/1168 useless extension candidates. Maximal degree in co-relation 6068. Up to 317 conditions per place. [2023-08-24 15:11:57,938 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 205 selfloop transitions, 171 changer transitions 29/405 dead transitions. [2023-08-24 15:11:57,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 405 transitions, 4678 flow [2023-08-24 15:11:57,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-24 15:11:57,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-24 15:11:57,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1570 transitions. [2023-08-24 15:11:57,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821811100292113 [2023-08-24 15:11:57,940 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1570 transitions. [2023-08-24 15:11:57,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1570 transitions. [2023-08-24 15:11:57,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:57,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1570 transitions. [2023-08-24 15:11:57,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.38461538461539) internal successors, (1570), 26 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:57,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:57,944 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 158.0) internal successors, (4266), 27 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:57,944 INFO L175 Difference]: Start difference. First operand has 236 places, 337 transitions, 3532 flow. Second operand 26 states and 1570 transitions. [2023-08-24 15:11:57,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 405 transitions, 4678 flow [2023-08-24 15:11:57,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 405 transitions, 4549 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-08-24 15:11:57,974 INFO L231 Difference]: Finished difference. Result has 229 places, 328 transitions, 3647 flow [2023-08-24 15:11:57,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3380, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3647, PETRI_PLACES=229, PETRI_TRANSITIONS=328} [2023-08-24 15:11:57,974 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 209 predicate places. [2023-08-24 15:11:57,974 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 328 transitions, 3647 flow [2023-08-24 15:11:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 57.76190476190476) internal successors, (1213), 21 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:57,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:57,975 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:57,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-24 15:11:58,175 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,SelfDestructingSolverStorable35 [2023-08-24 15:11:58,175 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:58,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1555403823, now seen corresponding path program 11 times [2023-08-24 15:11:58,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:58,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085420824] [2023-08-24 15:11:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:58,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:58,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:58,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085420824] [2023-08-24 15:11:58,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085420824] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:58,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753882129] [2023-08-24 15:11:58,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 15:11:58,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:58,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:58,308 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:58,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 15:11:58,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 15:11:58,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:58,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:11:58,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:58,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:11:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:11:58,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753882129] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:11:58,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:11:58,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-08-24 15:11:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589311998] [2023-08-24 15:11:58,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:11:58,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 15:11:58,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:11:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 15:11:58,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-24 15:11:58,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:11:58,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 328 transitions, 3647 flow. Second operand has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:58,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:11:58,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:11:58,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:11:59,049 INFO L124 PetriNetUnfolderBase]: 564/1084 cut-off events. [2023-08-24 15:11:59,049 INFO L125 PetriNetUnfolderBase]: For 3130/3130 co-relation queries the response was YES. [2023-08-24 15:11:59,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6079 conditions, 1084 events. 564/1084 cut-off events. For 3130/3130 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 5824 event pairs, 13 based on Foata normal form. 9/1091 useless extension candidates. Maximal degree in co-relation 6020. Up to 333 conditions per place. [2023-08-24 15:11:59,053 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 113 selfloop transitions, 29 changer transitions 226/368 dead transitions. [2023-08-24 15:11:59,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 368 transitions, 4590 flow [2023-08-24 15:11:59,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 15:11:59,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 15:11:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1082 transitions. [2023-08-24 15:11:59,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38045007032348804 [2023-08-24 15:11:59,054 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1082 transitions. [2023-08-24 15:11:59,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1082 transitions. [2023-08-24 15:11:59,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:11:59,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1082 transitions. [2023-08-24 15:11:59,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 60.111111111111114) internal successors, (1082), 18 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:59,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:59,057 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 158.0) internal successors, (3002), 19 states have internal predecessors, (3002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:59,057 INFO L175 Difference]: Start difference. First operand has 229 places, 328 transitions, 3647 flow. Second operand 18 states and 1082 transitions. [2023-08-24 15:11:59,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 368 transitions, 4590 flow [2023-08-24 15:11:59,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 368 transitions, 4280 flow, removed 33 selfloop flow, removed 20 redundant places. [2023-08-24 15:11:59,095 INFO L231 Difference]: Finished difference. Result has 216 places, 130 transitions, 1211 flow [2023-08-24 15:11:59,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1211, PETRI_PLACES=216, PETRI_TRANSITIONS=130} [2023-08-24 15:11:59,095 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-08-24 15:11:59,095 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 130 transitions, 1211 flow [2023-08-24 15:11:59,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.75) internal successors, (1155), 20 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:11:59,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:11:59,096 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:11:59,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 15:11:59,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-24 15:11:59,301 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:11:59,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:11:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1586501437, now seen corresponding path program 12 times [2023-08-24 15:11:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:11:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011498813] [2023-08-24 15:11:59,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:11:59,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:11:59,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:11:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:59,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:11:59,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011498813] [2023-08-24 15:11:59,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011498813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:11:59,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098203626] [2023-08-24 15:11:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 15:11:59,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:11:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:11:59,482 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:11:59,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 15:11:59,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 15:11:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:11:59,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-24 15:11:59,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:11:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:11:59,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:00,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:00,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098203626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:00,003 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:00,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-24 15:12:00,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746835559] [2023-08-24 15:12:00,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:00,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 15:12:00,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:00,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 15:12:00,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2023-08-24 15:12:00,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:12:00,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 130 transitions, 1211 flow. Second operand has 27 states, 27 states have (on average 57.55555555555556) internal successors, (1554), 27 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:00,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:00,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:12:00,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:00,481 INFO L124 PetriNetUnfolderBase]: 194/460 cut-off events. [2023-08-24 15:12:00,481 INFO L125 PetriNetUnfolderBase]: For 906/906 co-relation queries the response was YES. [2023-08-24 15:12:00,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2145 conditions, 460 events. 194/460 cut-off events. For 906/906 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2343 event pairs, 5 based on Foata normal form. 5/465 useless extension candidates. Maximal degree in co-relation 2093. Up to 275 conditions per place. [2023-08-24 15:12:00,483 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 131 selfloop transitions, 24 changer transitions 15/170 dead transitions. [2023-08-24 15:12:00,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 170 transitions, 1670 flow [2023-08-24 15:12:00,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-24 15:12:00,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-24 15:12:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1253 transitions. [2023-08-24 15:12:00,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37763713080168776 [2023-08-24 15:12:00,485 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1253 transitions. [2023-08-24 15:12:00,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1253 transitions. [2023-08-24 15:12:00,485 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:00,485 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1253 transitions. [2023-08-24 15:12:00,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 59.666666666666664) internal successors, (1253), 21 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:00,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:00,489 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 158.0) internal successors, (3476), 22 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:00,489 INFO L175 Difference]: Start difference. First operand has 216 places, 130 transitions, 1211 flow. Second operand 21 states and 1253 transitions. [2023-08-24 15:12:00,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 170 transitions, 1670 flow [2023-08-24 15:12:00,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 170 transitions, 1345 flow, removed 29 selfloop flow, removed 49 redundant places. [2023-08-24 15:12:00,499 INFO L231 Difference]: Finished difference. Result has 134 places, 126 transitions, 928 flow [2023-08-24 15:12:00,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=928, PETRI_PLACES=134, PETRI_TRANSITIONS=126} [2023-08-24 15:12:00,500 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-08-24 15:12:00,500 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 126 transitions, 928 flow [2023-08-24 15:12:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 57.55555555555556) internal successors, (1554), 27 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:00,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:00,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:00,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:00,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 15:12:00,705 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:00,706 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:00,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1510966837, now seen corresponding path program 13 times [2023-08-24 15:12:00,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:00,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257705513] [2023-08-24 15:12:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:00,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:00,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257705513] [2023-08-24 15:12:00,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257705513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:00,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078812584] [2023-08-24 15:12:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 15:12:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:00,885 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:12:00,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 15:12:00,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:00,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:12:00,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:01,103 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:01,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:12:01,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078812584] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:01,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:01,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-24 15:12:01,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645128838] [2023-08-24 15:12:01,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:01,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:12:01,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:01,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:12:01,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:12:01,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:12:01,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 126 transitions, 928 flow. Second operand has 22 states, 22 states have (on average 57.68181818181818) internal successors, (1269), 22 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:01,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:01,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:12:01,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:01,533 INFO L124 PetriNetUnfolderBase]: 184/410 cut-off events. [2023-08-24 15:12:01,533 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2023-08-24 15:12:01,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1688 conditions, 410 events. 184/410 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1890 event pairs, 3 based on Foata normal form. 5/409 useless extension candidates. Maximal degree in co-relation 1652. Up to 264 conditions per place. [2023-08-24 15:12:01,535 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 97 selfloop transitions, 8 changer transitions 47/152 dead transitions. [2023-08-24 15:12:01,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 152 transitions, 1300 flow [2023-08-24 15:12:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:12:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:12:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 955 transitions. [2023-08-24 15:12:01,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37776898734177217 [2023-08-24 15:12:01,536 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 955 transitions. [2023-08-24 15:12:01,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 955 transitions. [2023-08-24 15:12:01,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:01,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 955 transitions. [2023-08-24 15:12:01,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 59.6875) internal successors, (955), 16 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:01,539 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:01,539 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:01,539 INFO L175 Difference]: Start difference. First operand has 134 places, 126 transitions, 928 flow. Second operand 16 states and 955 transitions. [2023-08-24 15:12:01,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 152 transitions, 1300 flow [2023-08-24 15:12:01,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 152 transitions, 1238 flow, removed 7 selfloop flow, removed 16 redundant places. [2023-08-24 15:12:01,546 INFO L231 Difference]: Finished difference. Result has 128 places, 102 transitions, 757 flow [2023-08-24 15:12:01,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=859, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=757, PETRI_PLACES=128, PETRI_TRANSITIONS=102} [2023-08-24 15:12:01,547 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 108 predicate places. [2023-08-24 15:12:01,547 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 102 transitions, 757 flow [2023-08-24 15:12:01,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.68181818181818) internal successors, (1269), 22 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:01,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:01,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:01,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:01,752 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,SelfDestructingSolverStorable38 [2023-08-24 15:12:01,752 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:01,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:01,753 INFO L85 PathProgramCache]: Analyzing trace with hash 2117131147, now seen corresponding path program 14 times [2023-08-24 15:12:01,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:01,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546085618] [2023-08-24 15:12:01,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:01,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:01,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:01,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546085618] [2023-08-24 15:12:01,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546085618] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:01,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583362979] [2023-08-24 15:12:01,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 15:12:01,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:01,925 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:12:01,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 15:12:02,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 15:12:02,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:02,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:12:02,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:02,150 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:12:02,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583362979] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:02,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:02,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-24 15:12:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258920853] [2023-08-24 15:12:02,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:12:02,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:02,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:12:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:12:02,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:12:02,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 102 transitions, 757 flow. Second operand has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:02,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:02,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:12:02,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:02,692 INFO L124 PetriNetUnfolderBase]: 146/331 cut-off events. [2023-08-24 15:12:02,692 INFO L125 PetriNetUnfolderBase]: For 275/275 co-relation queries the response was YES. [2023-08-24 15:12:02,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1375 conditions, 331 events. 146/331 cut-off events. For 275/275 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1459 event pairs, 0 based on Foata normal form. 6/333 useless extension candidates. Maximal degree in co-relation 1341. Up to 125 conditions per place. [2023-08-24 15:12:02,693 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 75 selfloop transitions, 48 changer transitions 21/144 dead transitions. [2023-08-24 15:12:02,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 144 transitions, 1180 flow [2023-08-24 15:12:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 15:12:02,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 15:12:02,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1197 transitions. [2023-08-24 15:12:02,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3787974683544304 [2023-08-24 15:12:02,695 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1197 transitions. [2023-08-24 15:12:02,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1197 transitions. [2023-08-24 15:12:02,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:02,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1197 transitions. [2023-08-24 15:12:02,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 59.85) internal successors, (1197), 20 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:02,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:02,699 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 158.0) internal successors, (3318), 21 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:02,699 INFO L175 Difference]: Start difference. First operand has 128 places, 102 transitions, 757 flow. Second operand 20 states and 1197 transitions. [2023-08-24 15:12:02,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 144 transitions, 1180 flow [2023-08-24 15:12:02,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1091 flow, removed 23 selfloop flow, removed 15 redundant places. [2023-08-24 15:12:02,703 INFO L231 Difference]: Finished difference. Result has 105 places, 101 transitions, 775 flow [2023-08-24 15:12:02,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=684, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=775, PETRI_PLACES=105, PETRI_TRANSITIONS=101} [2023-08-24 15:12:02,704 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-08-24 15:12:02,704 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 101 transitions, 775 flow [2023-08-24 15:12:02,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.63636363636363) internal successors, (1268), 22 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:02,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:02,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:02,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-24 15:12:02,904 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,SelfDestructingSolverStorable39 [2023-08-24 15:12:02,905 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:02,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:02,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1040696963, now seen corresponding path program 15 times [2023-08-24 15:12:02,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:02,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311494763] [2023-08-24 15:12:02,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:02,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:03,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:03,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311494763] [2023-08-24 15:12:03,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311494763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:03,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360465331] [2023-08-24 15:12:03,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 15:12:03,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:03,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:03,093 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:12:03,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 15:12:03,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 15:12:03,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:03,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:12:03,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:03,366 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:03,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:03,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 15:12:03,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360465331] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:03,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:03,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 19 [2023-08-24 15:12:03,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80099752] [2023-08-24 15:12:03,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:03,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 15:12:03,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:03,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 15:12:03,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-08-24 15:12:03,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2023-08-24 15:12:03,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 101 transitions, 775 flow. Second operand has 21 states, 21 states have (on average 52.857142857142854) internal successors, (1110), 21 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:03,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:03,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2023-08-24 15:12:03,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:03,718 INFO L124 PetriNetUnfolderBase]: 133/287 cut-off events. [2023-08-24 15:12:03,719 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-24 15:12:03,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1253 conditions, 287 events. 133/287 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1133 event pairs, 0 based on Foata normal form. 5/286 useless extension candidates. Maximal degree in co-relation 1224. Up to 117 conditions per place. [2023-08-24 15:12:03,720 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 24 selfloop transitions, 16 changer transitions 83/123 dead transitions. [2023-08-24 15:12:03,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 1082 flow [2023-08-24 15:12:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 15:12:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 15:12:03,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 867 transitions. [2023-08-24 15:12:03,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34295886075949367 [2023-08-24 15:12:03,721 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 867 transitions. [2023-08-24 15:12:03,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 867 transitions. [2023-08-24 15:12:03,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:03,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 867 transitions. [2023-08-24 15:12:03,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 54.1875) internal successors, (867), 16 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:03,723 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:03,724 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 158.0) internal successors, (2686), 17 states have internal predecessors, (2686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:03,724 INFO L175 Difference]: Start difference. First operand has 105 places, 101 transitions, 775 flow. Second operand 16 states and 867 transitions. [2023-08-24 15:12:03,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 1082 flow [2023-08-24 15:12:03,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 123 transitions, 1005 flow, removed 7 selfloop flow, removed 14 redundant places. [2023-08-24 15:12:03,728 INFO L231 Difference]: Finished difference. Result has 99 places, 33 transitions, 187 flow [2023-08-24 15:12:03,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=187, PETRI_PLACES=99, PETRI_TRANSITIONS=33} [2023-08-24 15:12:03,728 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-08-24 15:12:03,728 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 33 transitions, 187 flow [2023-08-24 15:12:03,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 52.857142857142854) internal successors, (1110), 21 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:03,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 15:12:03,729 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 15:12:03,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:03,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:03,934 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 15:12:03,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 15:12:03,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1298039815, now seen corresponding path program 16 times [2023-08-24 15:12:03,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 15:12:03,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971847323] [2023-08-24 15:12:03,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 15:12:03,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 15:12:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 15:12:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:04,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 15:12:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971847323] [2023-08-24 15:12:04,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971847323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 15:12:04,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486775072] [2023-08-24 15:12:04,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 15:12:04,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:04,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 15:12:04,106 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 15:12:04,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 15:12:04,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 15:12:04,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 15:12:04,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-24 15:12:04,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 15:12:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 15:12:04,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 15:12:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 15:12:04,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486775072] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 15:12:04,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 15:12:04,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-08-24 15:12:04,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465561944] [2023-08-24 15:12:04,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 15:12:04,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 15:12:04,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 15:12:04,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 15:12:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-08-24 15:12:04,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 158 [2023-08-24 15:12:04,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 33 transitions, 187 flow. Second operand has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:04,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 15:12:04,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 158 [2023-08-24 15:12:04,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 15:12:04,655 INFO L124 PetriNetUnfolderBase]: 29/88 cut-off events. [2023-08-24 15:12:04,656 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-08-24 15:12:04,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 88 events. 29/88 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 215 event pairs, 0 based on Foata normal form. 4/92 useless extension candidates. Maximal degree in co-relation 312. Up to 22 conditions per place. [2023-08-24 15:12:04,656 INFO L140 encePairwiseOnDemand]: 150/158 looper letters, 0 selfloop transitions, 0 changer transitions 47/47 dead transitions. [2023-08-24 15:12:04,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 47 transitions, 308 flow [2023-08-24 15:12:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 15:12:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 15:12:04,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 879 transitions. [2023-08-24 15:12:04,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37088607594936707 [2023-08-24 15:12:04,657 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 879 transitions. [2023-08-24 15:12:04,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 879 transitions. [2023-08-24 15:12:04,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 15:12:04,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 879 transitions. [2023-08-24 15:12:04,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 58.6) internal successors, (879), 15 states have internal predecessors, (879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:04,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:04,660 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 158.0) internal successors, (2528), 16 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:04,660 INFO L175 Difference]: Start difference. First operand has 99 places, 33 transitions, 187 flow. Second operand 15 states and 879 transitions. [2023-08-24 15:12:04,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 47 transitions, 308 flow [2023-08-24 15:12:04,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 47 transitions, 249 flow, removed 4 selfloop flow, removed 13 redundant places. [2023-08-24 15:12:04,661 INFO L231 Difference]: Finished difference. Result has 63 places, 0 transitions, 0 flow [2023-08-24 15:12:04,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=0, PETRI_PLACES=63, PETRI_TRANSITIONS=0} [2023-08-24 15:12:04,662 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-24 15:12:04,662 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 0 transitions, 0 flow [2023-08-24 15:12:04,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 57.59090909090909) internal successors, (1267), 22 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 15:12:04,664 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 15:12:04,664 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 15:12:04,664 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 15:12:04,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 15:12:04,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 15:12:04,865 INFO L445 BasicCegarLoop]: Path program histogram: [20, 16, 6] [2023-08-24 15:12:04,867 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 15:12:04,867 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 15:12:04,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:12:04 BasicIcfg [2023-08-24 15:12:04,869 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 15:12:04,869 INFO L158 Benchmark]: Toolchain (without parser) took 57420.98ms. Allocated memory was 333.4MB in the beginning and 872.4MB in the end (delta: 539.0MB). Free memory was 309.5MB in the beginning and 499.5MB in the end (delta: -190.1MB). Peak memory consumption was 350.3MB. Max. memory is 16.0GB. [2023-08-24 15:12:04,869 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 333.4MB. Free memory was 310.8MB in the beginning and 310.7MB in the end (delta: 127.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 15:12:04,869 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.60ms. Allocated memory is still 333.4MB. Free memory was 309.5MB in the beginning and 298.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 15:12:04,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.96ms. Allocated memory is still 333.4MB. Free memory was 298.3MB in the beginning and 296.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:12:04,870 INFO L158 Benchmark]: Boogie Preprocessor took 31.21ms. Allocated memory is still 333.4MB. Free memory was 296.8MB in the beginning and 295.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 15:12:04,870 INFO L158 Benchmark]: RCFGBuilder took 413.21ms. Allocated memory is still 333.4MB. Free memory was 295.7MB in the beginning and 281.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 15:12:04,870 INFO L158 Benchmark]: TraceAbstraction took 56710.00ms. Allocated memory was 333.4MB in the beginning and 872.4MB in the end (delta: 539.0MB). Free memory was 280.0MB in the beginning and 499.5MB in the end (delta: -219.6MB). Peak memory consumption was 321.0MB. Max. memory is 16.0GB. [2023-08-24 15:12:04,872 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 333.4MB. Free memory was 310.8MB in the beginning and 310.7MB in the end (delta: 127.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 220.60ms. Allocated memory is still 333.4MB. Free memory was 309.5MB in the beginning and 298.3MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 35.96ms. Allocated memory is still 333.4MB. Free memory was 298.3MB in the beginning and 296.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.21ms. Allocated memory is still 333.4MB. Free memory was 296.8MB in the beginning and 295.7MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 413.21ms. Allocated memory is still 333.4MB. Free memory was 295.7MB in the beginning and 281.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 56710.00ms. Allocated memory was 333.4MB in the beginning and 872.4MB in the end (delta: 539.0MB). Free memory was 280.0MB in the beginning and 499.5MB in the end (delta: -219.6MB). Peak memory consumption was 321.0MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 77 PlacesBefore, 20 PlacesAfterwards, 76 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 7 FixpointIterations, 39 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 6 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 72 TotalNumberOfCompositions, 611 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 593, independent: 590, independent conditional: 0, independent unconditional: 590, dependent: 3, dependent conditional: 0, dependent unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 309, independent: 307, independent conditional: 0, independent unconditional: 307, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 593, independent: 283, independent conditional: 0, independent unconditional: 283, dependent: 1, dependent conditional: 0, dependent unconditional: 1, unknown: 309, unknown conditional: 0, unknown unconditional: 309] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 76]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 103 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: 56.6s, OverallIterations: 42, TraceHistogramMax: 3, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 24.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3011 SdHoareTripleChecker+Valid, 9.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3011 mSDsluCounter, 724 SdHoareTripleChecker+Invalid, 7.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 569 mSDsCounter, 756 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18860 IncrementalHoareTripleChecker+Invalid, 19616 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 756 mSolverCounterUnsat, 155 mSDtfsCounter, 18860 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1799 GetRequests, 570 SyntacticMatches, 58 SemanticMatches, 1171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11236 ImplicationChecksByTransitivity, 18.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3666occurred in iteration=26, InterpolantAutomatonStates: 856, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 19.2s InterpolantComputationTime, 1196 NumberOfCodeBlocks, 1196 NumberOfCodeBlocksAsserted, 116 NumberOfCheckSat, 1641 ConstructedInterpolants, 0 QuantifiedInterpolants, 22371 SizeOfPredicates, 74 NumberOfNonLiveVariables, 4551 ConjunctsInSsa, 913 ConjunctsInUnsatCore, 114 InterpolantComputations, 6 PerfectInterpolantSequences, 21/429 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 15:12:04,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...