/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/pthread-ext/35_double_lock_p3_vs.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 11:26:28,724 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 11:26:28,812 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 11:26:28,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 11:26:28,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 11:26:28,848 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 11:26:28,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 11:26:28,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 11:26:28,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 11:26:28,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 11:26:28,854 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 11:26:28,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 11:26:28,854 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 11:26:28,855 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 11:26:28,855 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 11:26:28,856 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 11:26:28,856 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 11:26:28,856 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 11:26:28,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 11:26:28,857 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 11:26:28,857 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 11:26:28,858 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 11:26:28,858 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 11:26:28,858 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 11:26:28,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 11:26:28,859 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 11:26:28,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 11:26:28,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:26:28,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 11:26:28,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 11:26:28,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 11:26:28,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 11:26:28,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 11:26:28,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 11:26:28,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 11:26:28,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 11:26:29,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 11:26:29,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 11:26:29,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 11:26:29,147 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 11:26:29,147 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 11:26:29,148 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-24 11:26:30,425 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 11:26:30,692 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 11:26:30,692 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i [2023-08-24 11:26:30,706 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4e9351c/9f5caaa5e0434cac85d1e57b2105cc7c/FLAG618150cd1 [2023-08-24 11:26:30,717 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a4e9351c/9f5caaa5e0434cac85d1e57b2105cc7c [2023-08-24 11:26:30,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 11:26:30,720 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 11:26:30,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 11:26:30,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 11:26:30,723 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 11:26:30,724 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:26:30" (1/1) ... [2023-08-24 11:26:30,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52d7cbc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:30, skipping insertion in model container [2023-08-24 11:26:30,725 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 11:26:30" (1/1) ... [2023-08-24 11:26:30,764 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 11:26:31,084 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-08-24 11:26:31,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:26:31,100 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 11:26:31,128 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-24 11:26:31,130 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [254] [2023-08-24 11:26:31,139 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/35_double_lock_p3_vs.i[30553,30566] [2023-08-24 11:26:31,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 11:26:31,173 INFO L206 MainTranslator]: Completed translation [2023-08-24 11:26:31,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31 WrapperNode [2023-08-24 11:26:31,173 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 11:26:31,174 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 11:26:31,174 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 11:26:31,175 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 11:26:31,180 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,210 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,238 INFO L138 Inliner]: procedures = 172, calls = 27, calls flagged for inlining = 11, calls inlined = 15, statements flattened = 126 [2023-08-24 11:26:31,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 11:26:31,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 11:26:31,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 11:26:31,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 11:26:31,246 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,246 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,258 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,259 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,270 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,271 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,272 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,275 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 11:26:31,275 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 11:26:31,276 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 11:26:31,276 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 11:26:31,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (1/1) ... [2023-08-24 11:26:31,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 11:26:31,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:26:31,317 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 11:26:31,329 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 11:26:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 11:26:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2023-08-24 11:26:31,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2023-08-24 11:26:31,349 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-08-24 11:26:31,349 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-08-24 11:26:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 11:26:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 11:26:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 11:26:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 11:26:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 11:26:31,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 11:26:31,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 11:26:31,352 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 11:26:31,465 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 11:26:31,467 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 11:26:31,658 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 11:26:31,808 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 11:26:31,808 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 11:26:31,810 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:26:31 BoogieIcfgContainer [2023-08-24 11:26:31,810 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 11:26:31,818 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 11:26:31,818 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 11:26:31,821 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 11:26:31,821 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 11:26:30" (1/3) ... [2023-08-24 11:26:31,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c5cb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:26:31, skipping insertion in model container [2023-08-24 11:26:31,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 11:26:31" (2/3) ... [2023-08-24 11:26:31,822 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8c5cb42 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 11:26:31, skipping insertion in model container [2023-08-24 11:26:31,822 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 11:26:31" (3/3) ... [2023-08-24 11:26:31,823 INFO L112 eAbstractionObserver]: Analyzing ICFG 35_double_lock_p3_vs.i [2023-08-24 11:26:31,836 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 11:26:31,836 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 11:26:31,836 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 11:26:31,892 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:26:31,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-24 11:26:31,958 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-24 11:26:31,959 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:31,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-24 11:26:31,964 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-24 11:26:31,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:31,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:26:31,978 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:31,980 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:31,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:31,998 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-24 11:26:31,998 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:31,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-24 11:26:32,001 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-24 11:26:33,871 INFO L134 LiptonReduction]: Checked pairs total: 3426 [2023-08-24 11:26:33,871 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-24 11:26:33,882 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:26:33,889 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;@479d915a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:26:33,890 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 11:26:33,896 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:26:33,897 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-24 11:26:33,897 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:33,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:33,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 11:26:33,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:33,903 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash 460053008, now seen corresponding path program 1 times [2023-08-24 11:26:33,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:33,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849966501] [2023-08-24 11:26:33,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:33,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:34,102 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 11:26:34,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:34,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849966501] [2023-08-24 11:26:34,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849966501] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:34,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:34,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 11:26:34,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204142208] [2023-08-24 11:26:34,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:34,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:26:34,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:26:34,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:26:34,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 135 [2023-08-24 11:26:34,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:34,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 135 [2023-08-24 11:26:34,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:34,249 INFO L124 PetriNetUnfolderBase]: 232/398 cut-off events. [2023-08-24 11:26:34,249 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:26:34,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 809 conditions, 398 events. 232/398 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1416 event pairs, 66 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 799. Up to 278 conditions per place. [2023-08-24 11:26:34,253 INFO L140 encePairwiseOnDemand]: 129/135 looper letters, 21 selfloop transitions, 2 changer transitions 1/26 dead transitions. [2023-08-24 11:26:34,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 108 flow [2023-08-24 11:26:34,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:26:34,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:26:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-24 11:26:34,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.454320987654321 [2023-08-24 11:26:34,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-24 11:26:34,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-24 11:26:34,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:34,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-24 11:26:34,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 135.0) internal successors, (540), 4 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,276 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 56 flow. Second operand 3 states and 184 transitions. [2023-08-24 11:26:34,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 108 flow [2023-08-24 11:26:34,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:26:34,279 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 55 flow [2023-08-24 11:26:34,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=55, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2023-08-24 11:26:34,284 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2023-08-24 11:26:34,284 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 55 flow [2023-08-24 11:26:34,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:34,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:34,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 11:26:34,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:34,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:34,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1682741378, now seen corresponding path program 1 times [2023-08-24 11:26:34,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:34,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310456973] [2023-08-24 11:26:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:34,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:34,418 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 11:26:34,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:34,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310456973] [2023-08-24 11:26:34,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310456973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:34,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:26:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725231631] [2023-08-24 11:26:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:34,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:26:34,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:34,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:26:34,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:26:34,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 135 [2023-08-24 11:26:34,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:34,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 135 [2023-08-24 11:26:34,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:34,533 INFO L124 PetriNetUnfolderBase]: 207/350 cut-off events. [2023-08-24 11:26:34,533 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-24 11:26:34,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 757 conditions, 350 events. 207/350 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1144 event pairs, 29 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 745. Up to 238 conditions per place. [2023-08-24 11:26:34,536 INFO L140 encePairwiseOnDemand]: 130/135 looper letters, 29 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2023-08-24 11:26:34,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 151 flow [2023-08-24 11:26:34,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 11:26:34,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 11:26:34,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2023-08-24 11:26:34,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2023-08-24 11:26:34,539 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 279 transitions. [2023-08-24 11:26:34,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 279 transitions. [2023-08-24 11:26:34,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:34,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 279 transitions. [2023-08-24 11:26:34,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 55.8) internal successors, (279), 5 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,543 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 135.0) internal successors, (810), 6 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,543 INFO L175 Difference]: Start difference. First operand has 27 places, 20 transitions, 55 flow. Second operand 5 states and 279 transitions. [2023-08-24 11:26:34,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 151 flow [2023-08-24 11:26:34,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 35 transitions, 147 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 11:26:34,545 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 63 flow [2023-08-24 11:26:34,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=63, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-24 11:26:34,545 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2023-08-24 11:26:34,546 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 63 flow [2023-08-24 11:26:34,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 50.8) internal successors, (254), 5 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:34,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:34,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 11:26:34,547 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:34,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash 625375123, now seen corresponding path program 1 times [2023-08-24 11:26:34,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:34,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392643158] [2023-08-24 11:26:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:34,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:34,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:34,629 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 11:26:34,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:34,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392643158] [2023-08-24 11:26:34,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392643158] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:34,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:34,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 11:26:34,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41747964] [2023-08-24 11:26:34,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:34,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-24 11:26:34,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:34,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-24 11:26:34,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-24 11:26:34,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 135 [2023-08-24 11:26:34,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 63 flow. Second operand has 6 states, 6 states have (on average 50.666666666666664) internal successors, (304), 6 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:34,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 135 [2023-08-24 11:26:34,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:34,720 INFO L124 PetriNetUnfolderBase]: 192/326 cut-off events. [2023-08-24 11:26:34,720 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-24 11:26:34,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 746 conditions, 326 events. 192/326 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1042 event pairs, 20 based on Foata normal form. 9/335 useless extension candidates. Maximal degree in co-relation 733. Up to 118 conditions per place. [2023-08-24 11:26:34,724 INFO L140 encePairwiseOnDemand]: 129/135 looper letters, 33 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-24 11:26:34,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 179 flow [2023-08-24 11:26:34,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 11:26:34,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 11:26:34,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 333 transitions. [2023-08-24 11:26:34,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-08-24 11:26:34,726 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 333 transitions. [2023-08-24 11:26:34,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 333 transitions. [2023-08-24 11:26:34,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:34,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 333 transitions. [2023-08-24 11:26:34,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 55.5) internal successors, (333), 6 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 135.0) internal successors, (945), 7 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,730 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 63 flow. Second operand 6 states and 333 transitions. [2023-08-24 11:26:34,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 179 flow [2023-08-24 11:26:34,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 11:26:34,732 INFO L231 Difference]: Finished difference. Result has 32 places, 20 transitions, 69 flow [2023-08-24 11:26:34,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=69, PETRI_PLACES=32, PETRI_TRANSITIONS=20} [2023-08-24 11:26:34,733 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2023-08-24 11:26:34,733 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 20 transitions, 69 flow [2023-08-24 11:26:34,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 50.666666666666664) internal successors, (304), 6 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:34,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:34,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 11:26:34,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:34,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1017679598, now seen corresponding path program 1 times [2023-08-24 11:26:34,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:34,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686068365] [2023-08-24 11:26:34,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:34,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:34,831 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 11:26:34,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:34,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686068365] [2023-08-24 11:26:34,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686068365] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:34,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:34,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:26:34,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976343314] [2023-08-24 11:26:34,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:34,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:26:34,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:34,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:26:34,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:26:34,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 135 [2023-08-24 11:26:34,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 20 transitions, 69 flow. Second operand has 7 states, 7 states have (on average 50.857142857142854) internal successors, (356), 7 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:34,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 135 [2023-08-24 11:26:34,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:34,958 INFO L124 PetriNetUnfolderBase]: 208/357 cut-off events. [2023-08-24 11:26:34,958 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-08-24 11:26:34,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 833 conditions, 357 events. 208/357 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1160 event pairs, 17 based on Foata normal form. 9/366 useless extension candidates. Maximal degree in co-relation 819. Up to 96 conditions per place. [2023-08-24 11:26:34,960 INFO L140 encePairwiseOnDemand]: 127/135 looper letters, 36 selfloop transitions, 6 changer transitions 2/46 dead transitions. [2023-08-24 11:26:34,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 209 flow [2023-08-24 11:26:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:26:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:26:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 388 transitions. [2023-08-24 11:26:34,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105820105820106 [2023-08-24 11:26:34,963 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 388 transitions. [2023-08-24 11:26:34,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 388 transitions. [2023-08-24 11:26:34,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:34,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 388 transitions. [2023-08-24 11:26:34,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 55.42857142857143) internal successors, (388), 7 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 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 11:26:34,968 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 135.0) internal successors, (1080), 8 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 11:26:34,968 INFO L175 Difference]: Start difference. First operand has 32 places, 20 transitions, 69 flow. Second operand 7 states and 388 transitions. [2023-08-24 11:26:34,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 209 flow [2023-08-24 11:26:34,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-24 11:26:34,971 INFO L231 Difference]: Finished difference. Result has 35 places, 20 transitions, 79 flow [2023-08-24 11:26:34,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=59, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=79, PETRI_PLACES=35, PETRI_TRANSITIONS=20} [2023-08-24 11:26:34,973 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 8 predicate places. [2023-08-24 11:26:34,973 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 20 transitions, 79 flow [2023-08-24 11:26:34,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.857142857142854) internal successors, (356), 7 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:34,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:34,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:34,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 11:26:34,975 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:34,976 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:34,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1483297501, now seen corresponding path program 1 times [2023-08-24 11:26:34,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:34,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384744243] [2023-08-24 11:26:34,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:34,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:35,142 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 11:26:35,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:35,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384744243] [2023-08-24 11:26:35,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384744243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:35,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:35,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:26:35,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706870044] [2023-08-24 11:26:35,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:35,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:26:35,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:35,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:26:35,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:26:35,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 135 [2023-08-24 11:26:35,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 20 transitions, 79 flow. Second operand has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:35,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:35,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 135 [2023-08-24 11:26:35,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:35,263 INFO L124 PetriNetUnfolderBase]: 174/299 cut-off events. [2023-08-24 11:26:35,263 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-08-24 11:26:35,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 749 conditions, 299 events. 174/299 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 952 event pairs, 14 based on Foata normal form. 6/305 useless extension candidates. Maximal degree in co-relation 733. Up to 125 conditions per place. [2023-08-24 11:26:35,268 INFO L140 encePairwiseOnDemand]: 127/135 looper letters, 0 selfloop transitions, 0 changer transitions 43/43 dead transitions. [2023-08-24 11:26:35,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 207 flow [2023-08-24 11:26:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 11:26:35,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 11:26:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 427 transitions. [2023-08-24 11:26:35,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39537037037037037 [2023-08-24 11:26:35,271 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 427 transitions. [2023-08-24 11:26:35,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 427 transitions. [2023-08-24 11:26:35,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:35,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 427 transitions. [2023-08-24 11:26:35,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 53.375) internal successors, (427), 8 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:35,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:35,274 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:35,275 INFO L175 Difference]: Start difference. First operand has 35 places, 20 transitions, 79 flow. Second operand 8 states and 427 transitions. [2023-08-24 11:26:35,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 207 flow [2023-08-24 11:26:35,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 43 transitions, 187 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-24 11:26:35,277 INFO L231 Difference]: Finished difference. Result has 31 places, 0 transitions, 0 flow [2023-08-24 11:26:35,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=135, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=31, PETRI_TRANSITIONS=0} [2023-08-24 11:26:35,280 INFO L281 CegarLoopForPetriNet]: 27 programPoint places, 4 predicate places. [2023-08-24 11:26:35,280 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 0 transitions, 0 flow [2023-08-24 11:26:35,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 50.0) internal successors, (350), 7 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:35,283 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2023-08-24 11:26:35,284 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-08-24 11:26:35,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 11:26:35,284 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-24 11:26:35,287 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE (1/2) [2023-08-24 11:26:35,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-24 11:26:35,302 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-24 11:26:35,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:35,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-24 11:26:35,304 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-24 11:26:35,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:35,305 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:26:35,305 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:35,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:35,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 158 flow [2023-08-24 11:26:35,315 INFO L124 PetriNetUnfolderBase]: 6/85 cut-off events. [2023-08-24 11:26:35,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:35,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 85 events. 6/85 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 69. Up to 4 conditions per place. [2023-08-24 11:26:35,317 INFO L119 LiptonReduction]: Number of co-enabled transitions 1820 [2023-08-24 11:26:36,940 INFO L134 LiptonReduction]: Checked pairs total: 3564 [2023-08-24 11:26:36,940 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-24 11:26:36,943 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-24 11:26:36,944 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;@479d915a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:26:36,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-24 11:26:36,946 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:26:36,946 INFO L124 PetriNetUnfolderBase]: 2/20 cut-off events. [2023-08-24 11:26:36,947 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:36,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:36,947 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:36,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 11:26:36,947 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:36,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1899232887, now seen corresponding path program 1 times [2023-08-24 11:26:36,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:36,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357256605] [2023-08-24 11:26:36,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:36,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:26:36,957 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-24 11:26:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-24 11:26:36,979 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-24 11:26:36,979 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-24 11:26:36,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-24 11:26:36,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-24 11:26:36,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 11:26:36,980 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-24 11:26:36,981 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-24 11:26:36,981 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-24 11:26:36,981 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-24 11:26:37,013 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-24 11:26:37,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 118 transitions, 260 flow [2023-08-24 11:26:37,027 INFO L124 PetriNetUnfolderBase]: 8/125 cut-off events. [2023-08-24 11:26:37,028 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:26:37,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 233 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 134. Up to 6 conditions per place. [2023-08-24 11:26:37,029 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 118 transitions, 260 flow [2023-08-24 11:26:37,029 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 103 transitions, 221 flow [2023-08-24 11:26:37,030 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 11:26:37,030 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-24 11:26:37,030 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 103 transitions, 221 flow [2023-08-24 11:26:37,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 103 transitions, 221 flow [2023-08-24 11:26:37,041 INFO L124 PetriNetUnfolderBase]: 8/125 cut-off events. [2023-08-24 11:26:37,042 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 11:26:37,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138 conditions, 125 events. 8/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 235 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 6 conditions per place. [2023-08-24 11:26:37,045 INFO L119 LiptonReduction]: Number of co-enabled transitions 4762 [2023-08-24 11:26:38,939 INFO L134 LiptonReduction]: Checked pairs total: 12587 [2023-08-24 11:26:38,940 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-24 11:26:38,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 11:26:38,942 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;@479d915a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 11:26:38,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 11:26:38,943 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 11:26:38,943 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-24 11:26:38,944 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-24 11:26:38,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:38,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-24 11:26:38,944 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:38,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:38,944 INFO L85 PathProgramCache]: Analyzing trace with hash 737311454, now seen corresponding path program 1 times [2023-08-24 11:26:38,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:38,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231283154] [2023-08-24 11:26:38,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:38,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:38,973 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 11:26:38,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:38,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231283154] [2023-08-24 11:26:38,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231283154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:38,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:38,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 11:26:38,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936704473] [2023-08-24 11:26:38,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:38,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 11:26:38,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:38,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 11:26:38,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 11:26:38,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 190 [2023-08-24 11:26:38,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:38,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:38,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 190 [2023-08-24 11:26:38,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:39,574 INFO L124 PetriNetUnfolderBase]: 4526/6451 cut-off events. [2023-08-24 11:26:39,575 INFO L125 PetriNetUnfolderBase]: For 212/212 co-relation queries the response was YES. [2023-08-24 11:26:39,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13094 conditions, 6451 events. 4526/6451 cut-off events. For 212/212 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 34865 event pairs, 1323 based on Foata normal form. 0/5798 useless extension candidates. Maximal degree in co-relation 13083. Up to 5903 conditions per place. [2023-08-24 11:26:39,619 INFO L140 encePairwiseOnDemand]: 184/190 looper letters, 46 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-24 11:26:39,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 224 flow [2023-08-24 11:26:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 11:26:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 11:26:39,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-24 11:26:39,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46842105263157896 [2023-08-24 11:26:39,625 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-24 11:26:39,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-24 11:26:39,626 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:39,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-24 11:26:39,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:39,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:39,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 190.0) internal successors, (760), 4 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:39,628 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 99 flow. Second operand 3 states and 267 transitions. [2023-08-24 11:26:39,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 224 flow [2023-08-24 11:26:39,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 221 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 11:26:39,630 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 111 flow [2023-08-24 11:26:39,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2023-08-24 11:26:39,631 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2023-08-24 11:26:39,632 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 111 flow [2023-08-24 11:26:39,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:39,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:39,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:39,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 11:26:39,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:39,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:39,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1086540050, now seen corresponding path program 1 times [2023-08-24 11:26:39,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:39,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278097771] [2023-08-24 11:26:39,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:39,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:39,692 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 11:26:39,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:39,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278097771] [2023-08-24 11:26:39,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278097771] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:39,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:39,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:26:39,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931270563] [2023-08-24 11:26:39,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:39,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:26:39,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:26:39,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:26:39,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-24 11:26:39,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 111 flow. Second operand has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:39,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:39,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-24 11:26:39,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:40,421 INFO L124 PetriNetUnfolderBase]: 5404/7701 cut-off events. [2023-08-24 11:26:40,421 INFO L125 PetriNetUnfolderBase]: For 806/806 co-relation queries the response was YES. [2023-08-24 11:26:40,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 7701 events. 5404/7701 cut-off events. For 806/806 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 43823 event pairs, 1265 based on Foata normal form. 56/7456 useless extension candidates. Maximal degree in co-relation 16373. Up to 5835 conditions per place. [2023-08-24 11:26:40,468 INFO L140 encePairwiseOnDemand]: 180/190 looper letters, 95 selfloop transitions, 17 changer transitions 0/116 dead transitions. [2023-08-24 11:26:40,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 116 transitions, 514 flow [2023-08-24 11:26:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:26:40,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:26:40,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 597 transitions. [2023-08-24 11:26:40,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4488721804511278 [2023-08-24 11:26:40,471 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 597 transitions. [2023-08-24 11:26:40,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 597 transitions. [2023-08-24 11:26:40,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:40,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 597 transitions. [2023-08-24 11:26:40,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 85.28571428571429) internal successors, (597), 7 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:40,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:40,475 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:40,475 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 111 flow. Second operand 7 states and 597 transitions. [2023-08-24 11:26:40,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 116 transitions, 514 flow [2023-08-24 11:26:40,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 116 transitions, 510 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 11:26:40,478 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 227 flow [2023-08-24 11:26:40,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=227, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2023-08-24 11:26:40,478 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 9 predicate places. [2023-08-24 11:26:40,478 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 227 flow [2023-08-24 11:26:40,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.0) internal successors, (355), 5 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:40,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:40,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:40,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 11:26:40,479 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:40,479 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:40,480 INFO L85 PathProgramCache]: Analyzing trace with hash 487940530, now seen corresponding path program 1 times [2023-08-24 11:26:40,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:40,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258029969] [2023-08-24 11:26:40,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:40,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:40,536 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 11:26:40,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258029969] [2023-08-24 11:26:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258029969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:40,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:26:40,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772622137] [2023-08-24 11:26:40,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:40,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:26:40,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:40,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:26:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:26:40,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 190 [2023-08-24 11:26:40,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 227 flow. Second operand has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:40,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:40,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 190 [2023-08-24 11:26:40,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:41,520 INFO L124 PetriNetUnfolderBase]: 6440/9205 cut-off events. [2023-08-24 11:26:41,521 INFO L125 PetriNetUnfolderBase]: For 4502/4502 co-relation queries the response was YES. [2023-08-24 11:26:41,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23027 conditions, 9205 events. 6440/9205 cut-off events. For 4502/4502 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 54740 event pairs, 883 based on Foata normal form. 112/9024 useless extension candidates. Maximal degree in co-relation 23009. Up to 5369 conditions per place. [2023-08-24 11:26:41,586 INFO L140 encePairwiseOnDemand]: 179/190 looper letters, 126 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2023-08-24 11:26:41,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 153 transitions, 798 flow [2023-08-24 11:26:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 11:26:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 11:26:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 762 transitions. [2023-08-24 11:26:41,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4456140350877193 [2023-08-24 11:26:41,589 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 762 transitions. [2023-08-24 11:26:41,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 762 transitions. [2023-08-24 11:26:41,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:41,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 762 transitions. [2023-08-24 11:26:41,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.66666666666667) internal successors, (762), 9 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:41,594 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:41,597 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:41,597 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 227 flow. Second operand 9 states and 762 transitions. [2023-08-24 11:26:41,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 153 transitions, 798 flow [2023-08-24 11:26:41,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 153 transitions, 790 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 11:26:41,617 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 321 flow [2023-08-24 11:26:41,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=321, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-24 11:26:41,618 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 18 predicate places. [2023-08-24 11:26:41,619 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 321 flow [2023-08-24 11:26:41,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.71428571428571) internal successors, (488), 7 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:41,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:41,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:41,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 11:26:41,619 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:41,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:41,620 INFO L85 PathProgramCache]: Analyzing trace with hash 567300941, now seen corresponding path program 1 times [2023-08-24 11:26:41,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:41,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170755106] [2023-08-24 11:26:41,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:26:41,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:41,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170755106] [2023-08-24 11:26:41,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170755106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:41,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:41,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 11:26:41,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015739094] [2023-08-24 11:26:41,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:41,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 11:26:41,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:41,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 11:26:41,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-24 11:26:41,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 190 [2023-08-24 11:26:41,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 321 flow. Second operand has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:41,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:41,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 190 [2023-08-24 11:26:41,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:42,697 INFO L124 PetriNetUnfolderBase]: 7333/10488 cut-off events. [2023-08-24 11:26:42,698 INFO L125 PetriNetUnfolderBase]: For 9068/9068 co-relation queries the response was YES. [2023-08-24 11:26:42,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28854 conditions, 10488 events. 7333/10488 cut-off events. For 9068/9068 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 63230 event pairs, 1571 based on Foata normal form. 60/10251 useless extension candidates. Maximal degree in co-relation 28833. Up to 8544 conditions per place. [2023-08-24 11:26:42,762 INFO L140 encePairwiseOnDemand]: 180/190 looper letters, 113 selfloop transitions, 25 changer transitions 0/142 dead transitions. [2023-08-24 11:26:42,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 142 transitions, 897 flow [2023-08-24 11:26:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-24 11:26:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-24 11:26:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 594 transitions. [2023-08-24 11:26:42,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44661654135338347 [2023-08-24 11:26:42,766 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 594 transitions. [2023-08-24 11:26:42,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 594 transitions. [2023-08-24 11:26:42,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:42,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 594 transitions. [2023-08-24 11:26:42,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:42,774 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:42,774 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 190.0) internal successors, (1520), 8 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:42,774 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 321 flow. Second operand 7 states and 594 transitions. [2023-08-24 11:26:42,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 142 transitions, 897 flow [2023-08-24 11:26:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 142 transitions, 823 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-08-24 11:26:42,801 INFO L231 Difference]: Finished difference. Result has 69 places, 83 transitions, 506 flow [2023-08-24 11:26:42,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=506, PETRI_PLACES=69, PETRI_TRANSITIONS=83} [2023-08-24 11:26:42,803 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 22 predicate places. [2023-08-24 11:26:42,803 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 83 transitions, 506 flow [2023-08-24 11:26:42,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 71.2) internal successors, (356), 5 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:42,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:42,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:42,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 11:26:42,804 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:42,804 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -284630156, now seen corresponding path program 1 times [2023-08-24 11:26:42,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:42,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248566447] [2023-08-24 11:26:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:42,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:26:42,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:42,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248566447] [2023-08-24 11:26:42,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248566447] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:42,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:42,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:26:42,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173911879] [2023-08-24 11:26:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:42,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:26:42,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:42,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:26:42,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:26:42,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 190 [2023-08-24 11:26:42,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 83 transitions, 506 flow. Second operand has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:42,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:42,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 190 [2023-08-24 11:26:42,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:44,002 INFO L124 PetriNetUnfolderBase]: 8621/12340 cut-off events. [2023-08-24 11:26:44,002 INFO L125 PetriNetUnfolderBase]: For 17710/17710 co-relation queries the response was YES. [2023-08-24 11:26:44,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36250 conditions, 12340 events. 8621/12340 cut-off events. For 17710/17710 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 76752 event pairs, 1477 based on Foata normal form. 128/12179 useless extension candidates. Maximal degree in co-relation 36225. Up to 8090 conditions per place. [2023-08-24 11:26:44,180 INFO L140 encePairwiseOnDemand]: 179/190 looper letters, 147 selfloop transitions, 36 changer transitions 0/187 dead transitions. [2023-08-24 11:26:44,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 187 transitions, 1256 flow [2023-08-24 11:26:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-24 11:26:44,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-24 11:26:44,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 758 transitions. [2023-08-24 11:26:44,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4432748538011696 [2023-08-24 11:26:44,183 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 758 transitions. [2023-08-24 11:26:44,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 758 transitions. [2023-08-24 11:26:44,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:44,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 758 transitions. [2023-08-24 11:26:44,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 84.22222222222223) internal successors, (758), 9 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:44,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:44,188 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 190.0) internal successors, (1900), 10 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:44,189 INFO L175 Difference]: Start difference. First operand has 69 places, 83 transitions, 506 flow. Second operand 9 states and 758 transitions. [2023-08-24 11:26:44,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 187 transitions, 1256 flow [2023-08-24 11:26:44,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 187 transitions, 1230 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-08-24 11:26:44,275 INFO L231 Difference]: Finished difference. Result has 79 places, 94 transitions, 685 flow [2023-08-24 11:26:44,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=685, PETRI_PLACES=79, PETRI_TRANSITIONS=94} [2023-08-24 11:26:44,276 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 32 predicate places. [2023-08-24 11:26:44,276 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 94 transitions, 685 flow [2023-08-24 11:26:44,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.85714285714286) internal successors, (489), 7 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:44,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:44,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:44,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 11:26:44,277 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:44,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:44,277 INFO L85 PathProgramCache]: Analyzing trace with hash -387139237, now seen corresponding path program 1 times [2023-08-24 11:26:44,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:44,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581144560] [2023-08-24 11:26:44,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:44,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:44,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:44,387 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 11:26:44,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:44,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581144560] [2023-08-24 11:26:44,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581144560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:44,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:44,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 11:26:44,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840008038] [2023-08-24 11:26:44,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:44,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 11:26:44,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:44,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 11:26:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-24 11:26:44,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-08-24 11:26:44,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 94 transitions, 685 flow. Second operand has 9 states, 9 states have (on average 68.77777777777777) internal successors, (619), 9 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:44,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:44,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-08-24 11:26:44,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:46,406 INFO L124 PetriNetUnfolderBase]: 13040/18605 cut-off events. [2023-08-24 11:26:46,407 INFO L125 PetriNetUnfolderBase]: For 45914/45914 co-relation queries the response was YES. [2023-08-24 11:26:46,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58296 conditions, 18605 events. 13040/18605 cut-off events. For 45914/45914 co-relation queries the response was YES. Maximal size of possible extension queue 962. Compared 123211 event pairs, 911 based on Foata normal form. 370/18626 useless extension candidates. Maximal degree in co-relation 58267. Up to 7882 conditions per place. [2023-08-24 11:26:46,522 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 236 selfloop transitions, 103 changer transitions 0/343 dead transitions. [2023-08-24 11:26:46,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 343 transitions, 2640 flow [2023-08-24 11:26:46,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 11:26:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 11:26:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1265 transitions. [2023-08-24 11:26:46,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.443859649122807 [2023-08-24 11:26:46,526 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1265 transitions. [2023-08-24 11:26:46,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1265 transitions. [2023-08-24 11:26:46,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:46,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1265 transitions. [2023-08-24 11:26:46,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.33333333333333) internal successors, (1265), 15 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:46,534 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:46,534 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:46,534 INFO L175 Difference]: Start difference. First operand has 79 places, 94 transitions, 685 flow. Second operand 15 states and 1265 transitions. [2023-08-24 11:26:46,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 343 transitions, 2640 flow [2023-08-24 11:26:46,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 343 transitions, 2398 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-24 11:26:46,875 INFO L231 Difference]: Finished difference. Result has 96 places, 161 transitions, 1576 flow [2023-08-24 11:26:46,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1576, PETRI_PLACES=96, PETRI_TRANSITIONS=161} [2023-08-24 11:26:46,876 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 49 predicate places. [2023-08-24 11:26:46,876 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 161 transitions, 1576 flow [2023-08-24 11:26:46,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 68.77777777777777) internal successors, (619), 9 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:46,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:46,877 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:46,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 11:26:46,877 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:46,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:46,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1562166797, now seen corresponding path program 1 times [2023-08-24 11:26:46,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:46,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963477785] [2023-08-24 11:26:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:46,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:26:46,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:46,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963477785] [2023-08-24 11:26:46,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963477785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:46,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:46,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:26:46,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243676211] [2023-08-24 11:26:46,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:26:46,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:46,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:26:46,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:26:46,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-08-24 11:26:46,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 161 transitions, 1576 flow. Second operand has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:46,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:46,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-08-24 11:26:46,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:48,959 INFO L124 PetriNetUnfolderBase]: 14134/20159 cut-off events. [2023-08-24 11:26:48,959 INFO L125 PetriNetUnfolderBase]: For 88180/88180 co-relation queries the response was YES. [2023-08-24 11:26:49,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76097 conditions, 20159 events. 14134/20159 cut-off events. For 88180/88180 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 133333 event pairs, 3021 based on Foata normal form. 48/19858 useless extension candidates. Maximal degree in co-relation 76059. Up to 16211 conditions per place. [2023-08-24 11:26:49,105 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 242 selfloop transitions, 71 changer transitions 0/317 dead transitions. [2023-08-24 11:26:49,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 317 transitions, 3219 flow [2023-08-24 11:26:49,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 11:26:49,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 11:26:49,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1118 transitions. [2023-08-24 11:26:49,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42030075187969923 [2023-08-24 11:26:49,109 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1118 transitions. [2023-08-24 11:26:49,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1118 transitions. [2023-08-24 11:26:49,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:49,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1118 transitions. [2023-08-24 11:26:49,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 79.85714285714286) internal successors, (1118), 14 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:49,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:49,116 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:49,116 INFO L175 Difference]: Start difference. First operand has 96 places, 161 transitions, 1576 flow. Second operand 14 states and 1118 transitions. [2023-08-24 11:26:49,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 317 transitions, 3219 flow [2023-08-24 11:26:49,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 317 transitions, 2955 flow, removed 80 selfloop flow, removed 7 redundant places. [2023-08-24 11:26:49,615 INFO L231 Difference]: Finished difference. Result has 107 places, 200 transitions, 2038 flow [2023-08-24 11:26:49,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1371, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2038, PETRI_PLACES=107, PETRI_TRANSITIONS=200} [2023-08-24 11:26:49,616 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 60 predicate places. [2023-08-24 11:26:49,616 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 200 transitions, 2038 flow [2023-08-24 11:26:49,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:49,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:49,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:49,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-24 11:26:49,616 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:49,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:49,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1587879437, now seen corresponding path program 2 times [2023-08-24 11:26:49,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:49,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681718981] [2023-08-24 11:26:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:49,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:49,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:26:49,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:49,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681718981] [2023-08-24 11:26:49,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681718981] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:49,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:49,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:26:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164033924] [2023-08-24 11:26:49,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:49,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:26:49,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:49,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:26:49,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:26:49,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-08-24 11:26:49,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 200 transitions, 2038 flow. Second operand has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:49,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:49,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-08-24 11:26:49,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:52,138 INFO L124 PetriNetUnfolderBase]: 15220/21717 cut-off events. [2023-08-24 11:26:52,138 INFO L125 PetriNetUnfolderBase]: For 111386/111386 co-relation queries the response was YES. [2023-08-24 11:26:52,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84763 conditions, 21717 events. 15220/21717 cut-off events. For 111386/111386 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 146307 event pairs, 3125 based on Foata normal form. 44/21404 useless extension candidates. Maximal degree in co-relation 84719. Up to 17361 conditions per place. [2023-08-24 11:26:52,319 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 275 selfloop transitions, 81 changer transitions 0/360 dead transitions. [2023-08-24 11:26:52,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 360 transitions, 3781 flow [2023-08-24 11:26:52,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 11:26:52,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 11:26:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1115 transitions. [2023-08-24 11:26:52,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4191729323308271 [2023-08-24 11:26:52,324 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1115 transitions. [2023-08-24 11:26:52,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1115 transitions. [2023-08-24 11:26:52,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:52,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1115 transitions. [2023-08-24 11:26:52,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 79.64285714285714) internal successors, (1115), 14 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:52,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:52,333 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 190.0) internal successors, (2850), 15 states have internal predecessors, (2850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:52,333 INFO L175 Difference]: Start difference. First operand has 107 places, 200 transitions, 2038 flow. Second operand 14 states and 1115 transitions. [2023-08-24 11:26:52,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 360 transitions, 3781 flow [2023-08-24 11:26:52,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 360 transitions, 3544 flow, removed 97 selfloop flow, removed 5 redundant places. [2023-08-24 11:26:52,861 INFO L231 Difference]: Finished difference. Result has 120 places, 234 transitions, 2447 flow [2023-08-24 11:26:52,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2447, PETRI_PLACES=120, PETRI_TRANSITIONS=234} [2023-08-24 11:26:52,863 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 73 predicate places. [2023-08-24 11:26:52,863 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 234 transitions, 2447 flow [2023-08-24 11:26:52,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:52,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:52,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:52,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-24 11:26:52,864 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:52,864 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1621313785, now seen corresponding path program 1 times [2023-08-24 11:26:52,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:52,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168711913] [2023-08-24 11:26:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:52,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:52,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:53,114 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 11:26:53,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:53,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168711913] [2023-08-24 11:26:53,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168711913] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:53,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:53,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 11:26:53,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23070333] [2023-08-24 11:26:53,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:53,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 11:26:53,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:53,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 11:26:53,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-24 11:26:53,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-08-24 11:26:53,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 234 transitions, 2447 flow. Second operand has 10 states, 10 states have (on average 67.8) internal successors, (678), 10 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:53,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:53,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-08-24 11:26:53,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:26:56,338 INFO L124 PetriNetUnfolderBase]: 16599/23738 cut-off events. [2023-08-24 11:26:56,338 INFO L125 PetriNetUnfolderBase]: For 159596/159596 co-relation queries the response was YES. [2023-08-24 11:26:56,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96288 conditions, 23738 events. 16599/23738 cut-off events. For 159596/159596 co-relation queries the response was YES. Maximal size of possible extension queue 1253. Compared 162747 event pairs, 1269 based on Foata normal form. 76/23469 useless extension candidates. Maximal degree in co-relation 96239. Up to 9415 conditions per place. [2023-08-24 11:26:56,520 INFO L140 encePairwiseOnDemand]: 175/190 looper letters, 301 selfloop transitions, 179 changer transitions 10/494 dead transitions. [2023-08-24 11:26:56,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 494 transitions, 5106 flow [2023-08-24 11:26:56,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 11:26:56,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 11:26:56,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1409 transitions. [2023-08-24 11:26:56,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362229102167183 [2023-08-24 11:26:56,524 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1409 transitions. [2023-08-24 11:26:56,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1409 transitions. [2023-08-24 11:26:56,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:26:56,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1409 transitions. [2023-08-24 11:26:56,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 82.88235294117646) internal successors, (1409), 17 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:56,532 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:56,532 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:56,533 INFO L175 Difference]: Start difference. First operand has 120 places, 234 transitions, 2447 flow. Second operand 17 states and 1409 transitions. [2023-08-24 11:26:56,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 494 transitions, 5106 flow [2023-08-24 11:26:57,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 494 transitions, 4782 flow, removed 99 selfloop flow, removed 6 redundant places. [2023-08-24 11:26:57,243 INFO L231 Difference]: Finished difference. Result has 133 places, 269 transitions, 3103 flow [2023-08-24 11:26:57,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=2180, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3103, PETRI_PLACES=133, PETRI_TRANSITIONS=269} [2023-08-24 11:26:57,243 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 86 predicate places. [2023-08-24 11:26:57,244 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 269 transitions, 3103 flow [2023-08-24 11:26:57,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.8) internal successors, (678), 10 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:57,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:26:57,244 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:26:57,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-24 11:26:57,244 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:26:57,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:26:57,245 INFO L85 PathProgramCache]: Analyzing trace with hash 2072422931, now seen corresponding path program 1 times [2023-08-24 11:26:57,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:26:57,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542025551] [2023-08-24 11:26:57,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:26:57,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:26:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:26:57,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:26:57,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:26:57,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542025551] [2023-08-24 11:26:57,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542025551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:26:57,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:26:57,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:26:57,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224493665] [2023-08-24 11:26:57,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:26:57,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 11:26:57,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:26:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 11:26:57,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 11:26:57,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-08-24 11:26:57,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 269 transitions, 3103 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:26:57,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:26:57,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-08-24 11:26:57,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:27:00,997 INFO L124 PetriNetUnfolderBase]: 19154/27435 cut-off events. [2023-08-24 11:27:00,997 INFO L125 PetriNetUnfolderBase]: For 226506/226506 co-relation queries the response was YES. [2023-08-24 11:27:01,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118493 conditions, 27435 events. 19154/27435 cut-off events. For 226506/226506 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 192193 event pairs, 2719 based on Foata normal form. 136/27370 useless extension candidates. Maximal degree in co-relation 118441. Up to 15474 conditions per place. [2023-08-24 11:27:01,248 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 293 selfloop transitions, 197 changer transitions 0/494 dead transitions. [2023-08-24 11:27:01,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 494 transitions, 5935 flow [2023-08-24 11:27:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 11:27:01,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 11:27:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1345 transitions. [2023-08-24 11:27:01,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41640866873065013 [2023-08-24 11:27:01,251 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1345 transitions. [2023-08-24 11:27:01,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1345 transitions. [2023-08-24 11:27:01,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:27:01,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1345 transitions. [2023-08-24 11:27:01,254 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 79.11764705882354) internal successors, (1345), 17 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:01,258 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:01,259 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:01,259 INFO L175 Difference]: Start difference. First operand has 133 places, 269 transitions, 3103 flow. Second operand 17 states and 1345 transitions. [2023-08-24 11:27:01,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 494 transitions, 5935 flow [2023-08-24 11:27:02,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 494 transitions, 5670 flow, removed 49 selfloop flow, removed 11 redundant places. [2023-08-24 11:27:02,537 INFO L231 Difference]: Finished difference. Result has 144 places, 334 transitions, 4474 flow [2023-08-24 11:27:02,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=2873, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4474, PETRI_PLACES=144, PETRI_TRANSITIONS=334} [2023-08-24 11:27:02,537 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 97 predicate places. [2023-08-24 11:27:02,538 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 334 transitions, 4474 flow [2023-08-24 11:27:02,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:02,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:27:02,538 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:27:02,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-24 11:27:02,538 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:27:02,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:27:02,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1996273818, now seen corresponding path program 1 times [2023-08-24 11:27:02,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:27:02,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620140739] [2023-08-24 11:27:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:02,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:27:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:02,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:27:02,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:27:02,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620140739] [2023-08-24 11:27:02,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620140739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:27:02,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:27:02,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:27:02,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689126070] [2023-08-24 11:27:02,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:27:02,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 11:27:02,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:27:02,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 11:27:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-24 11:27:02,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-08-24 11:27:02,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 334 transitions, 4474 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:02,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:27:02,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-08-24 11:27:02,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:27:07,045 INFO L124 PetriNetUnfolderBase]: 21335/30526 cut-off events. [2023-08-24 11:27:07,046 INFO L125 PetriNetUnfolderBase]: For 320982/320982 co-relation queries the response was YES. [2023-08-24 11:27:07,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143098 conditions, 30526 events. 21335/30526 cut-off events. For 320982/320982 co-relation queries the response was YES. Maximal size of possible extension queue 1693. Compared 216239 event pairs, 4345 based on Foata normal form. 112/30437 useless extension candidates. Maximal degree in co-relation 143039. Up to 23552 conditions per place. [2023-08-24 11:27:07,342 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 387 selfloop transitions, 121 changer transitions 0/512 dead transitions. [2023-08-24 11:27:07,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 512 transitions, 7061 flow [2023-08-24 11:27:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 11:27:07,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 11:27:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1183 transitions. [2023-08-24 11:27:07,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150877192982456 [2023-08-24 11:27:07,346 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1183 transitions. [2023-08-24 11:27:07,346 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1183 transitions. [2023-08-24 11:27:07,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:27:07,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1183 transitions. [2023-08-24 11:27:07,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:07,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:07,352 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:07,352 INFO L175 Difference]: Start difference. First operand has 144 places, 334 transitions, 4474 flow. Second operand 15 states and 1183 transitions. [2023-08-24 11:27:07,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 512 transitions, 7061 flow [2023-08-24 11:27:09,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 512 transitions, 6693 flow, removed 175 selfloop flow, removed 4 redundant places. [2023-08-24 11:27:09,315 INFO L231 Difference]: Finished difference. Result has 157 places, 366 transitions, 5135 flow [2023-08-24 11:27:09,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5135, PETRI_PLACES=157, PETRI_TRANSITIONS=366} [2023-08-24 11:27:09,316 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 110 predicate places. [2023-08-24 11:27:09,316 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 366 transitions, 5135 flow [2023-08-24 11:27:09,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:09,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:27:09,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:27:09,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-24 11:27:09,317 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:27:09,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:27:09,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1196385468, now seen corresponding path program 2 times [2023-08-24 11:27:09,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:27:09,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214884992] [2023-08-24 11:27:09,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:09,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:27:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:27:09,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:27:09,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214884992] [2023-08-24 11:27:09,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214884992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:27:09,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:27:09,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 11:27:09,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989277504] [2023-08-24 11:27:09,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:27:09,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 11:27:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:27:09,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 11:27:09,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-24 11:27:09,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-08-24 11:27:09,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 366 transitions, 5135 flow. Second operand has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:09,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:27:09,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-08-24 11:27:09,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:27:14,329 INFO L124 PetriNetUnfolderBase]: 22907/32742 cut-off events. [2023-08-24 11:27:14,329 INFO L125 PetriNetUnfolderBase]: For 364250/364250 co-relation queries the response was YES. [2023-08-24 11:27:14,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154801 conditions, 32742 events. 22907/32742 cut-off events. For 364250/364250 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 233521 event pairs, 5217 based on Foata normal form. 104/32645 useless extension candidates. Maximal degree in co-relation 154739. Up to 28226 conditions per place. [2023-08-24 11:27:14,684 INFO L140 encePairwiseOnDemand]: 177/190 looper letters, 406 selfloop transitions, 76 changer transitions 0/486 dead transitions. [2023-08-24 11:27:14,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 486 transitions, 7076 flow [2023-08-24 11:27:14,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-24 11:27:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-24 11:27:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 962 transitions. [2023-08-24 11:27:14,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219298245614035 [2023-08-24 11:27:14,686 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 962 transitions. [2023-08-24 11:27:14,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 962 transitions. [2023-08-24 11:27:14,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:27:14,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 962 transitions. [2023-08-24 11:27:14,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 80.16666666666667) internal successors, (962), 12 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:14,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:14,691 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 190.0) internal successors, (2470), 13 states have internal predecessors, (2470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:14,691 INFO L175 Difference]: Start difference. First operand has 157 places, 366 transitions, 5135 flow. Second operand 12 states and 962 transitions. [2023-08-24 11:27:14,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 486 transitions, 7076 flow [2023-08-24 11:27:16,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 486 transitions, 6719 flow, removed 100 selfloop flow, removed 11 redundant places. [2023-08-24 11:27:16,993 INFO L231 Difference]: Finished difference. Result has 160 places, 393 transitions, 5544 flow [2023-08-24 11:27:16,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5544, PETRI_PLACES=160, PETRI_TRANSITIONS=393} [2023-08-24 11:27:16,994 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 113 predicate places. [2023-08-24 11:27:16,994 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 393 transitions, 5544 flow [2023-08-24 11:27:16,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 69.28571428571429) internal successors, (485), 7 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:16,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:27:16,994 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:27:16,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-24 11:27:16,994 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:27:16,995 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:27:16,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1181835622, now seen corresponding path program 3 times [2023-08-24 11:27:16,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:27:16,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945766291] [2023-08-24 11:27:16,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:16,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:27:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:27:17,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:27:17,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945766291] [2023-08-24 11:27:17,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945766291] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:27:17,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:27:17,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:27:17,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373951576] [2023-08-24 11:27:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:27:17,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 11:27:17,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:27:17,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 11:27:17,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-08-24 11:27:17,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-08-24 11:27:17,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 393 transitions, 5544 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:17,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:27:17,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-08-24 11:27:17,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:27:21,946 INFO L124 PetriNetUnfolderBase]: 25186/36027 cut-off events. [2023-08-24 11:27:21,947 INFO L125 PetriNetUnfolderBase]: For 433298/433298 co-relation queries the response was YES. [2023-08-24 11:27:22,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170752 conditions, 36027 events. 25186/36027 cut-off events. For 433298/433298 co-relation queries the response was YES. Maximal size of possible extension queue 2074. Compared 262875 event pairs, 4673 based on Foata normal form. 120/35946 useless extension candidates. Maximal degree in co-relation 170687. Up to 20486 conditions per place. [2023-08-24 11:27:22,558 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 383 selfloop transitions, 224 changer transitions 0/611 dead transitions. [2023-08-24 11:27:22,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 611 transitions, 8709 flow [2023-08-24 11:27:22,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 11:27:22,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 11:27:22,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1345 transitions. [2023-08-24 11:27:22,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41640866873065013 [2023-08-24 11:27:22,560 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1345 transitions. [2023-08-24 11:27:22,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1345 transitions. [2023-08-24 11:27:22,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:27:22,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1345 transitions. [2023-08-24 11:27:22,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 79.11764705882354) internal successors, (1345), 17 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:22,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:22,567 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 190.0) internal successors, (3420), 18 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:22,567 INFO L175 Difference]: Start difference. First operand has 160 places, 393 transitions, 5544 flow. Second operand 17 states and 1345 transitions. [2023-08-24 11:27:22,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 611 transitions, 8709 flow [2023-08-24 11:27:25,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 611 transitions, 8444 flow, removed 128 selfloop flow, removed 2 redundant places. [2023-08-24 11:27:25,714 INFO L231 Difference]: Finished difference. Result has 180 places, 436 transitions, 6842 flow [2023-08-24 11:27:25,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=5279, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6842, PETRI_PLACES=180, PETRI_TRANSITIONS=436} [2023-08-24 11:27:25,715 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 133 predicate places. [2023-08-24 11:27:25,715 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 436 transitions, 6842 flow [2023-08-24 11:27:25,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:25,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:27:25,716 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:27:25,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-24 11:27:25,716 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:27:25,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:27:25,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1238743469, now seen corresponding path program 2 times [2023-08-24 11:27:25,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:27:25,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186242118] [2023-08-24 11:27:25,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:25,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:27:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:27:25,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:27:25,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186242118] [2023-08-24 11:27:25,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186242118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:27:25,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:27:25,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-24 11:27:25,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693747552] [2023-08-24 11:27:25,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:27:25,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-24 11:27:25,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:27:25,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-24 11:27:25,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-08-24 11:27:25,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-08-24 11:27:25,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 436 transitions, 6842 flow. Second operand has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:25,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:27:25,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-08-24 11:27:25,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:27:31,899 INFO L124 PetriNetUnfolderBase]: 26538/37951 cut-off events. [2023-08-24 11:27:31,899 INFO L125 PetriNetUnfolderBase]: For 507824/507824 co-relation queries the response was YES. [2023-08-24 11:27:32,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188017 conditions, 37951 events. 26538/37951 cut-off events. For 507824/507824 co-relation queries the response was YES. Maximal size of possible extension queue 2187. Compared 278589 event pairs, 5915 based on Foata normal form. 96/37842 useless extension candidates. Maximal degree in co-relation 187945. Up to 30898 conditions per place. [2023-08-24 11:27:32,572 INFO L140 encePairwiseOnDemand]: 176/190 looper letters, 474 selfloop transitions, 122 changer transitions 0/600 dead transitions. [2023-08-24 11:27:32,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 600 transitions, 9542 flow [2023-08-24 11:27:32,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 11:27:32,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 11:27:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1183 transitions. [2023-08-24 11:27:32,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4150877192982456 [2023-08-24 11:27:32,574 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1183 transitions. [2023-08-24 11:27:32,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1183 transitions. [2023-08-24 11:27:32,574 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:27:32,574 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1183 transitions. [2023-08-24 11:27:32,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 78.86666666666666) internal successors, (1183), 15 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:32,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:32,580 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:32,580 INFO L175 Difference]: Start difference. First operand has 180 places, 436 transitions, 6842 flow. Second operand 15 states and 1183 transitions. [2023-08-24 11:27:32,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 600 transitions, 9542 flow [2023-08-24 11:27:38,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 600 transitions, 9118 flow, removed 203 selfloop flow, removed 5 redundant places. [2023-08-24 11:27:38,859 INFO L231 Difference]: Finished difference. Result has 192 places, 455 transitions, 7309 flow [2023-08-24 11:27:38,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7309, PETRI_PLACES=192, PETRI_TRANSITIONS=455} [2023-08-24 11:27:38,859 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 145 predicate places. [2023-08-24 11:27:38,859 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 455 transitions, 7309 flow [2023-08-24 11:27:38,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 68.0) internal successors, (544), 8 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:38,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:27:38,860 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:27:38,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-24 11:27:38,860 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:27:38,860 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:27:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1403233678, now seen corresponding path program 1 times [2023-08-24 11:27:38,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:27:38,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544047802] [2023-08-24 11:27:38,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:38,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:27:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:38,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:27:38,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:27:38,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544047802] [2023-08-24 11:27:38,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544047802] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:27:38,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:27:38,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-08-24 11:27:38,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617690782] [2023-08-24 11:27:38,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:27:38,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 11:27:38,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:27:38,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 11:27:38,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-24 11:27:38,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 190 [2023-08-24 11:27:38,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 455 transitions, 7309 flow. Second operand has 9 states, 9 states have (on average 68.88888888888889) internal successors, (620), 9 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:38,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:27:38,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 190 [2023-08-24 11:27:38,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:27:46,287 INFO L124 PetriNetUnfolderBase]: 31439/44878 cut-off events. [2023-08-24 11:27:46,288 INFO L125 PetriNetUnfolderBase]: For 594952/594952 co-relation queries the response was YES. [2023-08-24 11:27:46,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224518 conditions, 44878 events. 31439/44878 cut-off events. For 594952/594952 co-relation queries the response was YES. Maximal size of possible extension queue 2575. Compared 336599 event pairs, 2779 based on Foata normal form. 92/44769 useless extension candidates. Maximal degree in co-relation 224443. Up to 21228 conditions per place. [2023-08-24 11:27:47,072 INFO L140 encePairwiseOnDemand]: 175/190 looper letters, 476 selfloop transitions, 401 changer transitions 0/881 dead transitions. [2023-08-24 11:27:47,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 881 transitions, 14149 flow [2023-08-24 11:27:47,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 11:27:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 11:27:47,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1261 transitions. [2023-08-24 11:27:47,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4424561403508772 [2023-08-24 11:27:47,074 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1261 transitions. [2023-08-24 11:27:47,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1261 transitions. [2023-08-24 11:27:47,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:27:47,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1261 transitions. [2023-08-24 11:27:47,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 84.06666666666666) internal successors, (1261), 15 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:47,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:47,079 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 190.0) internal successors, (3040), 16 states have internal predecessors, (3040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:47,079 INFO L175 Difference]: Start difference. First operand has 192 places, 455 transitions, 7309 flow. Second operand 15 states and 1261 transitions. [2023-08-24 11:27:47,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 881 transitions, 14149 flow [2023-08-24 11:27:51,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 881 transitions, 13638 flow, removed 147 selfloop flow, removed 11 redundant places. [2023-08-24 11:27:51,381 INFO L231 Difference]: Finished difference. Result has 204 places, 634 transitions, 11764 flow [2023-08-24 11:27:51,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11764, PETRI_PLACES=204, PETRI_TRANSITIONS=634} [2023-08-24 11:27:51,381 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 157 predicate places. [2023-08-24 11:27:51,381 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 634 transitions, 11764 flow [2023-08-24 11:27:51,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 68.88888888888889) internal successors, (620), 9 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:51,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:27:51,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:27:51,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-24 11:27:51,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:27:51,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:27:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash 396651458, now seen corresponding path program 1 times [2023-08-24 11:27:51,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:27:51,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902037670] [2023-08-24 11:27:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:27:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:51,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:27:51,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:27:51,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902037670] [2023-08-24 11:27:51,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902037670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:27:51,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389504376] [2023-08-24 11:27:51,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:27:51,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:27:51,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:27:51,481 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 11:27:51,482 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 11:27:51,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:27:51,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 11:27:51,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:27:51,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:27:51,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:27:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:27:51,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389504376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:27:51,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:27:51,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-24 11:27:51,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510243405] [2023-08-24 11:27:51,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:27:51,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 11:27:51,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:27:51,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 11:27:51,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-08-24 11:27:51,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-08-24 11:27:51,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 634 transitions, 11764 flow. Second operand has 15 states, 15 states have (on average 68.13333333333334) internal successors, (1022), 15 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:27:51,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:27:51,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-08-24 11:27:51,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:28:02,179 INFO L124 PetriNetUnfolderBase]: 36027/51498 cut-off events. [2023-08-24 11:28:02,180 INFO L125 PetriNetUnfolderBase]: For 1002994/1002994 co-relation queries the response was YES. [2023-08-24 11:28:02,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289651 conditions, 51498 events. 36027/51498 cut-off events. For 1002994/1002994 co-relation queries the response was YES. Maximal size of possible extension queue 3077. Compared 391422 event pairs, 4565 based on Foata normal form. 292/51593 useless extension candidates. Maximal degree in co-relation 289567. Up to 17042 conditions per place. [2023-08-24 11:28:03,094 INFO L140 encePairwiseOnDemand]: 175/190 looper letters, 528 selfloop transitions, 688 changer transitions 0/1220 dead transitions. [2023-08-24 11:28:03,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 1220 transitions, 21167 flow [2023-08-24 11:28:03,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-24 11:28:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-24 11:28:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 3478 transitions. [2023-08-24 11:28:03,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39794050343249426 [2023-08-24 11:28:03,098 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 3478 transitions. [2023-08-24 11:28:03,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 3478 transitions. [2023-08-24 11:28:03,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:28:03,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 3478 transitions. [2023-08-24 11:28:03,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 75.6086956521739) internal successors, (3478), 46 states have internal predecessors, (3478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:03,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 190.0) internal successors, (8930), 47 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:03,111 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 190.0) internal successors, (8930), 47 states have internal predecessors, (8930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:03,112 INFO L175 Difference]: Start difference. First operand has 204 places, 634 transitions, 11764 flow. Second operand 46 states and 3478 transitions. [2023-08-24 11:28:03,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 1220 transitions, 21167 flow [2023-08-24 11:28:11,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 1220 transitions, 20281 flow, removed 340 selfloop flow, removed 6 redundant places. [2023-08-24 11:28:11,800 INFO L231 Difference]: Finished difference. Result has 259 places, 797 transitions, 16698 flow [2023-08-24 11:28:11,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=11137, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16698, PETRI_PLACES=259, PETRI_TRANSITIONS=797} [2023-08-24 11:28:11,801 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 212 predicate places. [2023-08-24 11:28:11,801 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 797 transitions, 16698 flow [2023-08-24 11:28:11,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 68.13333333333334) internal successors, (1022), 15 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:11,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:28:11,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:28:11,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 11:28:12,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 11:28:12,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:28:12,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:28:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 112198516, now seen corresponding path program 1 times [2023-08-24 11:28:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:28:12,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553378350] [2023-08-24 11:28:12,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:28:12,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:28:12,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:28:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:28:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:28:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553378350] [2023-08-24 11:28:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553378350] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:28:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:28:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 11:28:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056604683] [2023-08-24 11:28:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:28:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 11:28:12,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:28:12,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 11:28:12,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-08-24 11:28:12,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 190 [2023-08-24 11:28:12,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 797 transitions, 16698 flow. Second operand has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:12,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:28:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 190 [2023-08-24 11:28:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:28:25,231 INFO L124 PetriNetUnfolderBase]: 39786/56927 cut-off events. [2023-08-24 11:28:25,232 INFO L125 PetriNetUnfolderBase]: For 1304390/1304390 co-relation queries the response was YES. [2023-08-24 11:28:26,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350368 conditions, 56927 events. 39786/56927 cut-off events. For 1304390/1304390 co-relation queries the response was YES. Maximal size of possible extension queue 3392. Compared 439689 event pairs, 3325 based on Foata normal form. 112/56842 useless extension candidates. Maximal degree in co-relation 350267. Up to 24810 conditions per place. [2023-08-24 11:28:26,467 INFO L140 encePairwiseOnDemand]: 174/190 looper letters, 613 selfloop transitions, 581 changer transitions 66/1264 dead transitions. [2023-08-24 11:28:26,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 1264 transitions, 26017 flow [2023-08-24 11:28:26,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-24 11:28:26,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-24 11:28:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1489 transitions. [2023-08-24 11:28:26,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353801169590643 [2023-08-24 11:28:26,470 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1489 transitions. [2023-08-24 11:28:26,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1489 transitions. [2023-08-24 11:28:26,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:28:26,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1489 transitions. [2023-08-24 11:28:26,472 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 82.72222222222223) internal successors, (1489), 18 states have internal predecessors, (1489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:26,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 190.0) internal successors, (3610), 19 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:26,475 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 190.0) internal successors, (3610), 19 states have internal predecessors, (3610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:26,475 INFO L175 Difference]: Start difference. First operand has 259 places, 797 transitions, 16698 flow. Second operand 18 states and 1489 transitions. [2023-08-24 11:28:26,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 1264 transitions, 26017 flow [2023-08-24 11:28:40,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 1264 transitions, 23112 flow, removed 1241 selfloop flow, removed 13 redundant places. [2023-08-24 11:28:40,949 INFO L231 Difference]: Finished difference. Result has 268 places, 883 transitions, 18368 flow [2023-08-24 11:28:40,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=14736, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=797, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=485, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=18368, PETRI_PLACES=268, PETRI_TRANSITIONS=883} [2023-08-24 11:28:40,950 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 221 predicate places. [2023-08-24 11:28:40,950 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 883 transitions, 18368 flow [2023-08-24 11:28:40,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.9) internal successors, (679), 10 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:40,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:28:40,950 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:28:40,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-24 11:28:40,950 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:28:40,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:28:40,951 INFO L85 PathProgramCache]: Analyzing trace with hash -950254716, now seen corresponding path program 1 times [2023-08-24 11:28:40,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:28:40,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806055165] [2023-08-24 11:28:40,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:28:40,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:28:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:28:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:28:41,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:28:41,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806055165] [2023-08-24 11:28:41,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806055165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 11:28:41,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112086418] [2023-08-24 11:28:41,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:28:41,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 11:28:41,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 11:28:41,079 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 11:28:41,085 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 11:28:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:28:41,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 11:28:41,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 11:28:41,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:28:41,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 11:28:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 11:28:41,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112086418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 11:28:41,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 11:28:41,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-08-24 11:28:41,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518261693] [2023-08-24 11:28:41,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 11:28:41,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 11:28:41,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:28:41,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 11:28:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-24 11:28:41,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-08-24 11:28:41,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 883 transitions, 18368 flow. Second operand has 16 states, 16 states have (on average 68.1875) internal successors, (1091), 16 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:41,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:28:41,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-08-24 11:28:41,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:28:57,672 INFO L124 PetriNetUnfolderBase]: 44581/63900 cut-off events. [2023-08-24 11:28:57,673 INFO L125 PetriNetUnfolderBase]: For 1542620/1542620 co-relation queries the response was YES. [2023-08-24 11:28:58,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399838 conditions, 63900 events. 44581/63900 cut-off events. For 1542620/1542620 co-relation queries the response was YES. Maximal size of possible extension queue 3886. Compared 500406 event pairs, 3141 based on Foata normal form. 104/63990 useless extension candidates. Maximal degree in co-relation 399731. Up to 20338 conditions per place. [2023-08-24 11:28:59,081 INFO L140 encePairwiseOnDemand]: 174/190 looper letters, 701 selfloop transitions, 978 changer transitions 1/1684 dead transitions. [2023-08-24 11:28:59,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 1684 transitions, 33804 flow [2023-08-24 11:28:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 11:28:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 11:28:59,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3442 transitions. [2023-08-24 11:28:59,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025730994152047 [2023-08-24 11:28:59,085 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3442 transitions. [2023-08-24 11:28:59,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3442 transitions. [2023-08-24 11:28:59,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:28:59,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3442 transitions. [2023-08-24 11:28:59,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 76.4888888888889) internal successors, (3442), 45 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:59,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 190.0) internal successors, (8740), 46 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:59,098 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 190.0) internal successors, (8740), 46 states have internal predecessors, (8740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:28:59,098 INFO L175 Difference]: Start difference. First operand has 268 places, 883 transitions, 18368 flow. Second operand 45 states and 3442 transitions. [2023-08-24 11:28:59,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 1684 transitions, 33804 flow [2023-08-24 11:29:14,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 1684 transitions, 32625 flow, removed 322 selfloop flow, removed 10 redundant places. [2023-08-24 11:29:14,121 INFO L231 Difference]: Finished difference. Result has 320 places, 1188 transitions, 27918 flow [2023-08-24 11:29:14,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=17706, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=883, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=27918, PETRI_PLACES=320, PETRI_TRANSITIONS=1188} [2023-08-24 11:29:14,122 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 273 predicate places. [2023-08-24 11:29:14,124 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 1188 transitions, 27918 flow [2023-08-24 11:29:14,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 68.1875) internal successors, (1091), 16 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:29:14,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:29:14,125 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:29:14,130 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 11:29:14,329 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,SelfDestructingSolverStorable23 [2023-08-24 11:29:14,330 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:29:14,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:29:14,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1303559548, now seen corresponding path program 2 times [2023-08-24 11:29:14,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:29:14,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251397985] [2023-08-24 11:29:14,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:29:14,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:29:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:29:14,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:29:14,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:29:14,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251397985] [2023-08-24 11:29:14,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251397985] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:29:14,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:29:14,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 11:29:14,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228226868] [2023-08-24 11:29:14,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:29:14,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 11:29:14,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:29:14,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 11:29:14,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 11:29:14,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-08-24 11:29:14,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 1188 transitions, 27918 flow. Second operand has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:29:14,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:29:14,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-08-24 11:29:14,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:29:37,519 INFO L124 PetriNetUnfolderBase]: 47802/68495 cut-off events. [2023-08-24 11:29:37,519 INFO L125 PetriNetUnfolderBase]: For 1977436/1977436 co-relation queries the response was YES. [2023-08-24 11:29:38,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464659 conditions, 68495 events. 47802/68495 cut-off events. For 1977436/1977436 co-relation queries the response was YES. Maximal size of possible extension queue 4118. Compared 541360 event pairs, 9669 based on Foata normal form. 56/68537 useless extension candidates. Maximal degree in co-relation 464533. Up to 58226 conditions per place. [2023-08-24 11:29:39,313 INFO L140 encePairwiseOnDemand]: 175/190 looper letters, 1280 selfloop transitions, 241 changer transitions 0/1525 dead transitions. [2023-08-24 11:29:39,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 1525 transitions, 36290 flow [2023-08-24 11:29:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 11:29:39,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 11:29:39,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1827 transitions. [2023-08-24 11:29:39,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4006578947368421 [2023-08-24 11:29:39,315 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1827 transitions. [2023-08-24 11:29:39,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1827 transitions. [2023-08-24 11:29:39,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 11:29:39,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1827 transitions. [2023-08-24 11:29:39,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 76.125) internal successors, (1827), 24 states have internal predecessors, (1827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:29:39,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 190.0) internal successors, (4750), 25 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:29:39,320 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 190.0) internal successors, (4750), 25 states have internal predecessors, (4750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:29:39,320 INFO L175 Difference]: Start difference. First operand has 320 places, 1188 transitions, 27918 flow. Second operand 24 states and 1827 transitions. [2023-08-24 11:29:39,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 1525 transitions, 36290 flow [2023-08-24 11:30:10,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1525 transitions, 34862 flow, removed 657 selfloop flow, removed 10 redundant places. [2023-08-24 11:30:10,490 INFO L231 Difference]: Finished difference. Result has 343 places, 1273 transitions, 29647 flow [2023-08-24 11:30:10,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=190, PETRI_DIFFERENCE_MINUEND_FLOW=26746, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=951, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=29647, PETRI_PLACES=343, PETRI_TRANSITIONS=1273} [2023-08-24 11:30:10,491 INFO L281 CegarLoopForPetriNet]: 47 programPoint places, 296 predicate places. [2023-08-24 11:30:10,491 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1273 transitions, 29647 flow [2023-08-24 11:30:10,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:30:10,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 11:30:10,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 11:30:10,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-24 11:30:10,492 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-24 11:30:10,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 11:30:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1099617128, now seen corresponding path program 1 times [2023-08-24 11:30:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 11:30:10,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371611346] [2023-08-24 11:30:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 11:30:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 11:30:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 11:30:10,588 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 11:30:10,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 11:30:10,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371611346] [2023-08-24 11:30:10,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371611346] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 11:30:10,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 11:30:10,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-08-24 11:30:10,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969553797] [2023-08-24 11:30:10,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 11:30:10,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-24 11:30:10,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 11:30:10,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-24 11:30:10,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-24 11:30:10,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 190 [2023-08-24 11:30:10,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1273 transitions, 29647 flow. Second operand has 10 states, 10 states have (on average 67.0) internal successors, (670), 10 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 11:30:10,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 11:30:10,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 190 [2023-08-24 11:30:10,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 11:30:34,924 INFO L124 PetriNetUnfolderBase]: 50688/72581 cut-off events. [2023-08-24 11:30:34,924 INFO L125 PetriNetUnfolderBase]: For 2098204/2098204 co-relation queries the response was YES. [2023-08-24 11:30:36,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 491313 conditions, 72581 events. 50688/72581 cut-off events. For 2098204/2098204 co-relation queries the response was YES. Maximal size of possible extension queue 4362. Compared 575199 event pairs, 9897 based on Foata normal form. 72/72639 useless extension candidates. Maximal degree in co-relation 491177. Up to 60287 conditions per place.