/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked TOGETHER -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-03 19:54:21,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-03 19:54:21,801 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-03 19:54:21,805 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-03 19:54:21,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-03 19:54:21,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-03 19:54:21,806 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-03 19:54:21,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-03 19:54:21,837 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-03 19:54:21,841 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-03 19:54:21,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-03 19:54:21,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-03 19:54:21,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-03 19:54:21,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-03 19:54:21,844 INFO L153 SettingsManager]: * Use SBE=true [2023-08-03 19:54:21,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-03 19:54:21,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-03 19:54:21,844 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-03 19:54:21,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-03 19:54:21,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-03 19:54:21,845 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-03 19:54:21,845 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-03 19:54:21,845 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-03 19:54:21,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-03 19:54:21,846 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-03 19:54:21,846 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-03 19:54:21,846 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-03 19:54:21,847 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-03 19:54:21,847 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-03 19:54:21,847 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-03 19:54:21,848 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:54:21,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-03 19:54:21,849 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-03 19:54:21,850 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-03 19:54:21,850 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-03 19:54:21,850 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> TOGETHER [2023-08-03 19:54:22,092 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-03 19:54:22,112 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-03 19:54:22,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-03 19:54:22,114 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-03 19:54:22,114 INFO L274 PluginConnector]: CDTParser initialized [2023-08-03 19:54:22,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c [2023-08-03 19:54:23,295 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-03 19:54:23,494 INFO L384 CDTParser]: Found 1 translation units. [2023-08-03 19:54:23,495 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c [2023-08-03 19:54:23,501 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1a5f1dc/2885d0aab5924564aad13f0421311fcb/FLAG7bd8e14c9 [2023-08-03 19:54:23,513 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e1a5f1dc/2885d0aab5924564aad13f0421311fcb [2023-08-03 19:54:23,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-03 19:54:23,517 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-03 19:54:23,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-03 19:54:23,518 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-03 19:54:23,521 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-03 19:54:23,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d4b5855 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23, skipping insertion in model container [2023-08-03 19:54:23,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,540 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-03 19:54:23,685 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c[2072,2085] [2023-08-03 19:54:23,686 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:54:23,694 INFO L201 MainTranslator]: Completed pre-run [2023-08-03 19:54:23,718 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_mult-comm.wvr_bound2.c[2072,2085] [2023-08-03 19:54:23,719 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-03 19:54:23,730 INFO L206 MainTranslator]: Completed translation [2023-08-03 19:54:23,730 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23 WrapperNode [2023-08-03 19:54:23,730 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-03 19:54:23,731 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-03 19:54:23,731 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-03 19:54:23,731 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-03 19:54:23,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,744 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,759 INFO L138 Inliner]: procedures = 21, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 86 [2023-08-03 19:54:23,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-03 19:54:23,761 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-03 19:54:23,761 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-03 19:54:23,761 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-03 19:54:23,769 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,769 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,783 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,786 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,787 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,788 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,789 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-03 19:54:23,790 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-03 19:54:23,790 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-03 19:54:23,790 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-03 19:54:23,791 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (1/1) ... [2023-08-03 19:54:23,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-03 19:54:23,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:23,820 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) [2023-08-03 19:54:23,825 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 [2023-08-03 19:54:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-03 19:54:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-03 19:54:23,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-03 19:54:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-03 19:54:23,849 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-03 19:54:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-03 19:54:23,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-03 19:54:23,850 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-03 19:54:23,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-03 19:54:23,850 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-03 19:54:23,850 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-03 19:54:23,850 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-03 19:54:23,851 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-03 19:54:23,928 INFO L236 CfgBuilder]: Building ICFG [2023-08-03 19:54:23,930 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-03 19:54:24,108 INFO L277 CfgBuilder]: Performing block encoding [2023-08-03 19:54:24,114 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-03 19:54:24,114 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-08-03 19:54:24,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:54:24 BoogieIcfgContainer [2023-08-03 19:54:24,116 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-03 19:54:24,119 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-03 19:54:24,119 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-03 19:54:24,121 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-03 19:54:24,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.08 07:54:23" (1/3) ... [2023-08-03 19:54:24,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1126d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:54:24, skipping insertion in model container [2023-08-03 19:54:24,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.08 07:54:23" (2/3) ... [2023-08-03 19:54:24,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c1126d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.08 07:54:24, skipping insertion in model container [2023-08-03 19:54:24,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.08 07:54:24" (3/3) ... [2023-08-03 19:54:24,123 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_mult-comm.wvr_bound2.c [2023-08-03 19:54:24,130 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-03 19:54:24,139 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-03 19:54:24,139 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-03 19:54:24,139 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-03 19:54:24,194 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-03 19:54:24,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-03 19:54:24,326 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-03 19:54:24,326 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:54:24,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 32/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 838 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-03 19:54:24,340 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 107 transitions, 236 flow [2023-08-03 19:54:24,349 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 236 flow [2023-08-03 19:54:24,354 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:54:24,365 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-03 19:54:24,368 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 107 transitions, 236 flow [2023-08-03 19:54:24,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 107 transitions, 236 flow [2023-08-03 19:54:24,410 INFO L124 PetriNetUnfolderBase]: 32/247 cut-off events. [2023-08-03 19:54:24,410 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-03 19:54:24,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 247 events. 32/247 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 838 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 125. Up to 8 conditions per place. [2023-08-03 19:54:24,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 2400 [2023-08-03 19:54:26,264 INFO L134 LiptonReduction]: Checked pairs total: 2818 [2023-08-03 19:54:26,265 INFO L136 LiptonReduction]: Total number of compositions: 87 [2023-08-03 19:54:26,279 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:54:26,285 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=true, 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;@365e4563, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:54:26,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:54:26,289 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:54:26,289 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 19:54:26,289 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:54:26,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:26,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 19:54:26,290 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:26,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:26,295 INFO L85 PathProgramCache]: Analyzing trace with hash 388098245, now seen corresponding path program 1 times [2023-08-03 19:54:26,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:26,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006406937] [2023-08-03 19:54:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:26,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:26,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:54:26,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:26,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006406937] [2023-08-03 19:54:26,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006406937] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:26,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:54:26,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:54:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621269177] [2023-08-03 19:54:26,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:26,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:54:26,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:26,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:54:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:54:26,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 194 [2023-08-03 19:54:26,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:26,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:26,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 194 [2023-08-03 19:54:26,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:26,683 INFO L124 PetriNetUnfolderBase]: 260/420 cut-off events. [2023-08-03 19:54:26,683 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-03 19:54:26,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 850 conditions, 420 events. 260/420 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1610 event pairs, 86 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 692. Up to 390 conditions per place. [2023-08-03 19:54:26,690 INFO L140 encePairwiseOnDemand]: 190/194 looper letters, 24 selfloop transitions, 2 changer transitions 0/32 dead transitions. [2023-08-03 19:54:26,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 32 transitions, 138 flow [2023-08-03 19:54:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:54:26,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:54:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-08-03 19:54:26,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506872852233677 [2023-08-03 19:54:26,712 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-08-03 19:54:26,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-08-03 19:54:26,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:26,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-08-03 19:54:26,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:26,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:26,728 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:26,730 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 82 flow. Second operand 3 states and 295 transitions. [2023-08-03 19:54:26,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 32 transitions, 138 flow [2023-08-03 19:54:26,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 32 transitions, 138 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:54:26,736 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 88 flow [2023-08-03 19:54:26,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=194, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2023-08-03 19:54:26,742 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 2 predicate places. [2023-08-03 19:54:26,742 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 88 flow [2023-08-03 19:54:26,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:26,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:26,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-03 19:54:26,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-03 19:54:26,744 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:26,747 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:26,747 INFO L85 PathProgramCache]: Analyzing trace with hash -827730633, now seen corresponding path program 1 times [2023-08-03 19:54:26,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:26,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871531842] [2023-08-03 19:54:26,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:26,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:54:26,786 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-03 19:54:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-03 19:54:26,843 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-03 19:54:26,843 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-03 19:54:26,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-03 19:54:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-08-03 19:54:26,850 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-03 19:54:26,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-03 19:54:26,851 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-03 19:54:26,855 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-03 19:54:26,855 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-03 19:54:26,890 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-03 19:54:26,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-03 19:54:27,000 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-03 19:54:27,000 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:54:27,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 822 events. 133/822 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4201 event pairs, 1 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-03 19:54:27,007 INFO L82 GeneralOperation]: Start removeDead. Operand has 121 places, 133 transitions, 314 flow [2023-08-03 19:54:27,012 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 133 transitions, 314 flow [2023-08-03 19:54:27,012 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-03 19:54:27,012 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-03 19:54:27,013 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 133 transitions, 314 flow [2023-08-03 19:54:27,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 133 transitions, 314 flow [2023-08-03 19:54:27,083 INFO L124 PetriNetUnfolderBase]: 133/822 cut-off events. [2023-08-03 19:54:27,083 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2023-08-03 19:54:27,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 919 conditions, 822 events. 133/822 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4201 event pairs, 1 based on Foata normal form. 0/686 useless extension candidates. Maximal degree in co-relation 475. Up to 32 conditions per place. [2023-08-03 19:54:27,101 INFO L119 LiptonReduction]: Number of co-enabled transitions 6000 [2023-08-03 19:54:29,142 INFO L134 LiptonReduction]: Checked pairs total: 8863 [2023-08-03 19:54:29,142 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-03 19:54:29,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-03 19:54:29,145 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=true, 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;@365e4563, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-03 19:54:29,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-03 19:54:29,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-03 19:54:29,147 INFO L124 PetriNetUnfolderBase]: 1/13 cut-off events. [2023-08-03 19:54:29,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-03 19:54:29,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:29,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-03 19:54:29,147 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:29,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:29,148 INFO L85 PathProgramCache]: Analyzing trace with hash 635906829, now seen corresponding path program 1 times [2023-08-03 19:54:29,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:29,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394897790] [2023-08-03 19:54:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:29,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:29,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:54:29,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:29,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394897790] [2023-08-03 19:54:29,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394897790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:29,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:54:29,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-03 19:54:29,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815054395] [2023-08-03 19:54:29,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:29,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:54:29,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:29,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:54:29,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:54:29,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-03 19:54:29,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 44 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:29,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:29,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-03 19:54:29,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:29,922 INFO L124 PetriNetUnfolderBase]: 8526/11037 cut-off events. [2023-08-03 19:54:29,922 INFO L125 PetriNetUnfolderBase]: For 1042/1042 co-relation queries the response was YES. [2023-08-03 19:54:29,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22380 conditions, 11037 events. 8526/11037 cut-off events. For 1042/1042 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 47456 event pairs, 3472 based on Foata normal form. 0/6248 useless extension candidates. Maximal degree in co-relation 6836. Up to 10600 conditions per place. [2023-08-03 19:54:29,987 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 35 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-03 19:54:29,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 47 transitions, 216 flow [2023-08-03 19:54:29,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:54:29,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:54:29,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 360 transitions. [2023-08-03 19:54:29,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128205128205128 [2023-08-03 19:54:29,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 360 transitions. [2023-08-03 19:54:29,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 360 transitions. [2023-08-03 19:54:29,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:29,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 360 transitions. [2023-08-03 19:54:29,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:29,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:29,993 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:29,993 INFO L175 Difference]: Start difference. First operand has 41 places, 44 transitions, 136 flow. Second operand 3 states and 360 transitions. [2023-08-03 19:54:29,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 47 transitions, 216 flow [2023-08-03 19:54:29,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 47 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:54:29,996 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 146 flow [2023-08-03 19:54:29,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=146, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-03 19:54:29,997 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 2 predicate places. [2023-08-03 19:54:29,997 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 146 flow [2023-08-03 19:54:29,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.66666666666667) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:29,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:29,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:29,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-03 19:54:29,998 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:29,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -597924358, now seen corresponding path program 1 times [2023-08-03 19:54:29,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:29,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848014027] [2023-08-03 19:54:29,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:29,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:54:30,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848014027] [2023-08-03 19:54:30,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848014027] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:30,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829906176] [2023-08-03 19:54:30,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:30,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:30,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:30,055 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) [2023-08-03 19:54:30,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-03 19:54:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:30,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:54:30,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:30,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:54:30,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:54:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829906176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:30,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:54:30,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:54:30,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705324807] [2023-08-03 19:54:30,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:30,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:54:30,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:54:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:30,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-03 19:54:30,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:30,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:30,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-03 19:54:30,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:30,869 INFO L124 PetriNetUnfolderBase]: 8488/11053 cut-off events. [2023-08-03 19:54:30,870 INFO L125 PetriNetUnfolderBase]: For 898/898 co-relation queries the response was YES. [2023-08-03 19:54:30,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22377 conditions, 11053 events. 8488/11053 cut-off events. For 898/898 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 49829 event pairs, 3438 based on Foata normal form. 0/6301 useless extension candidates. Maximal degree in co-relation 22347. Up to 10389 conditions per place. [2023-08-03 19:54:30,927 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 40 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-03 19:54:30,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 246 flow [2023-08-03 19:54:30,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:54:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:54:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-03 19:54:30,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170940170940171 [2023-08-03 19:54:30,929 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-03 19:54:30,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-03 19:54:30,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:30,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-03 19:54:30,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:30,932 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:30,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:30,933 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 146 flow. Second operand 3 states and 363 transitions. [2023-08-03 19:54:30,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 246 flow [2023-08-03 19:54:30,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:30,936 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 156 flow [2023-08-03 19:54:30,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2023-08-03 19:54:30,936 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2023-08-03 19:54:30,937 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 156 flow [2023-08-03 19:54:30,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:30,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:30,937 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-03 19:54:30,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-03 19:54:31,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:31,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:31,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:31,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2090564366, now seen corresponding path program 1 times [2023-08-03 19:54:31,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:31,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598485703] [2023-08-03 19:54:31,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:31,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:54:31,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:31,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598485703] [2023-08-03 19:54:31,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598485703] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:31,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008523465] [2023-08-03 19:54:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:31,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:31,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:31,243 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) [2023-08-03 19:54:31,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-03 19:54:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:31,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:54:31,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-03 19:54:31,343 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:54:31,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008523465] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:31,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:54:31,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-03 19:54:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460183552] [2023-08-03 19:54:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:54:31,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-03 19:54:31,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:31,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:31,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-03 19:54:31,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:32,111 INFO L124 PetriNetUnfolderBase]: 8464/11017 cut-off events. [2023-08-03 19:54:32,112 INFO L125 PetriNetUnfolderBase]: For 1133/1133 co-relation queries the response was YES. [2023-08-03 19:54:32,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22577 conditions, 11017 events. 8464/11017 cut-off events. For 1133/1133 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 49290 event pairs, 2427 based on Foata normal form. 9/6430 useless extension candidates. Maximal degree in co-relation 6914. Up to 10492 conditions per place. [2023-08-03 19:54:32,187 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2023-08-03 19:54:32,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 52 transitions, 257 flow [2023-08-03 19:54:32,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:54:32,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:54:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-03 19:54:32,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897435897435897 [2023-08-03 19:54:32,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-03 19:54:32,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-03 19:54:32,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:32,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-03 19:54:32,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:32,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:32,194 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:32,194 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 156 flow. Second operand 5 states and 573 transitions. [2023-08-03 19:54:32,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 52 transitions, 257 flow [2023-08-03 19:54:32,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:54:32,199 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 165 flow [2023-08-03 19:54:32,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2023-08-03 19:54:32,201 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 6 predicate places. [2023-08-03 19:54:32,201 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 165 flow [2023-08-03 19:54:32,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.6) internal successors, (538), 5 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:32,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:32,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:32,212 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:32,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:32,407 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:32,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:32,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1369649751, now seen corresponding path program 1 times [2023-08-03 19:54:32,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:32,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068886719] [2023-08-03 19:54:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:32,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:32,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:32,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-03 19:54:32,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:32,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068886719] [2023-08-03 19:54:32,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068886719] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:32,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232475715] [2023-08-03 19:54:32,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:32,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:32,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:32,477 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:32,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-03 19:54:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:32,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:54:32,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-03 19:54:32,545 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:54:32,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232475715] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:32,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:54:32,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-03 19:54:32,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899690798] [2023-08-03 19:54:32,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:32,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:54:32,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:32,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:54:32,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:32,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-03 19:54:32,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:32,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:32,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-03 19:54:32,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:33,133 INFO L124 PetriNetUnfolderBase]: 7233/9555 cut-off events. [2023-08-03 19:54:33,134 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2023-08-03 19:54:33,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19560 conditions, 9555 events. 7233/9555 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 43522 event pairs, 2468 based on Foata normal form. 0/5681 useless extension candidates. Maximal degree in co-relation 6706. Up to 6763 conditions per place. [2023-08-03 19:54:33,196 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 48 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 19:54:33,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 303 flow [2023-08-03 19:54:33,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:54:33,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:54:33,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-03 19:54:33,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-08-03 19:54:33,198 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-03 19:54:33,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-03 19:54:33,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:33,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-03 19:54:33,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:33,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:33,201 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:33,201 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 165 flow. Second operand 3 states and 369 transitions. [2023-08-03 19:54:33,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 303 flow [2023-08-03 19:54:33,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 296 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:54:33,205 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 170 flow [2023-08-03 19:54:33,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2023-08-03 19:54:33,208 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2023-08-03 19:54:33,208 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 170 flow [2023-08-03 19:54:33,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:33,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:33,209 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:33,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:33,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:33,414 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:33,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:33,414 INFO L85 PathProgramCache]: Analyzing trace with hash 2072510245, now seen corresponding path program 1 times [2023-08-03 19:54:33,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:33,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543428418] [2023-08-03 19:54:33,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:33,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:33,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:33,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543428418] [2023-08-03 19:54:33,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543428418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:33,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778646018] [2023-08-03 19:54:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:33,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:33,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:33,470 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:33,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-03 19:54:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:33,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:54:33,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:33,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:33,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778646018] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:54:33,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:54:33,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 19:54:33,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754207941] [2023-08-03 19:54:33,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:54:33,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:33,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:33,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:33,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:33,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-03 19:54:33,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:33,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:33,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-03 19:54:33,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:34,131 INFO L124 PetriNetUnfolderBase]: 6552/8619 cut-off events. [2023-08-03 19:54:34,132 INFO L125 PetriNetUnfolderBase]: For 1301/1301 co-relation queries the response was YES. [2023-08-03 19:54:34,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18203 conditions, 8619 events. 6552/8619 cut-off events. For 1301/1301 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 38186 event pairs, 1930 based on Foata normal form. 3/5259 useless extension candidates. Maximal degree in co-relation 5227. Up to 8209 conditions per place. [2023-08-03 19:54:34,167 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 40 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-03 19:54:34,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 52 transitions, 264 flow [2023-08-03 19:54:34,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:34,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:34,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-03 19:54:34,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49786324786324787 [2023-08-03 19:54:34,170 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-03 19:54:34,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-03 19:54:34,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:34,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-03 19:54:34,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:34,174 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:34,174 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:34,174 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 170 flow. Second operand 4 states and 466 transitions. [2023-08-03 19:54:34,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 52 transitions, 264 flow [2023-08-03 19:54:34,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:34,180 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 166 flow [2023-08-03 19:54:34,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 19:54:34,181 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 19:54:34,182 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 166 flow [2023-08-03 19:54:34,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:34,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:34,182 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:34,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:34,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:34,388 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:34,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:34,388 INFO L85 PathProgramCache]: Analyzing trace with hash -625055817, now seen corresponding path program 1 times [2023-08-03 19:54:34,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:34,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564276485] [2023-08-03 19:54:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:34,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:54:34,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:34,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564276485] [2023-08-03 19:54:34,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564276485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:34,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925382841] [2023-08-03 19:54:34,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:34,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:34,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:34,461 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:34,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-03 19:54:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:34,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-03 19:54:34,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:34,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-03 19:54:34,542 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:54:34,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925382841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:34,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:54:34,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-03 19:54:34,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103620703] [2023-08-03 19:54:34,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:34,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:34,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:34,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:34,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:54:34,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-03 19:54:34,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 166 flow. Second operand has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:34,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:34,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-03 19:54:34,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:34,947 INFO L124 PetriNetUnfolderBase]: 6120/8079 cut-off events. [2023-08-03 19:54:34,947 INFO L125 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2023-08-03 19:54:34,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16970 conditions, 8079 events. 6120/8079 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36163 event pairs, 400 based on Foata normal form. 81/5013 useless extension candidates. Maximal degree in co-relation 7300. Up to 6966 conditions per place. [2023-08-03 19:54:34,993 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 52 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2023-08-03 19:54:34,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 64 transitions, 316 flow [2023-08-03 19:54:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:54:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:54:34,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 585 transitions. [2023-08-03 19:54:34,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-03 19:54:34,996 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 585 transitions. [2023-08-03 19:54:34,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 585 transitions. [2023-08-03 19:54:34,996 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:34,996 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 585 transitions. [2023-08-03 19:54:34,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:34,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,000 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,000 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 166 flow. Second operand 5 states and 585 transitions. [2023-08-03 19:54:35,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 64 transitions, 316 flow [2023-08-03 19:54:35,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 304 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-03 19:54:35,006 INFO L231 Difference]: Finished difference. Result has 50 places, 45 transitions, 171 flow [2023-08-03 19:54:35,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=50, PETRI_TRANSITIONS=45} [2023-08-03 19:54:35,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 9 predicate places. [2023-08-03 19:54:35,007 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 45 transitions, 171 flow [2023-08-03 19:54:35,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.6) internal successors, (543), 5 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:35,007 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:35,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:35,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:35,212 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:35,213 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 485099438, now seen corresponding path program 1 times [2023-08-03 19:54:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642895651] [2023-08-03 19:54:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-03 19:54:35,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642895651] [2023-08-03 19:54:35,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642895651] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:35,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678699498] [2023-08-03 19:54:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:35,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:35,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:35,255 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:35,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-03 19:54:35,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:35,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-03 19:54:35,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:35,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:35,329 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-03 19:54:35,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678699498] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:35,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-03 19:54:35,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-03 19:54:35,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299562605] [2023-08-03 19:54:35,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:35,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:54:35,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:35,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:54:35,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:35,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-03 19:54:35,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 45 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:35,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-03 19:54:35,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:35,767 INFO L124 PetriNetUnfolderBase]: 5997/8008 cut-off events. [2023-08-03 19:54:35,767 INFO L125 PetriNetUnfolderBase]: For 1520/1520 co-relation queries the response was YES. [2023-08-03 19:54:35,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17005 conditions, 8008 events. 5997/8008 cut-off events. For 1520/1520 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 36479 event pairs, 2243 based on Foata normal form. 0/5017 useless extension candidates. Maximal degree in co-relation 7491. Up to 5805 conditions per place. [2023-08-03 19:54:35,806 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-03 19:54:35,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 59 transitions, 309 flow [2023-08-03 19:54:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:54:35,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:54:35,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2023-08-03 19:54:35,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-08-03 19:54:35,808 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2023-08-03 19:54:35,808 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2023-08-03 19:54:35,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:35,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2023-08-03 19:54:35,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,811 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,811 INFO L175 Difference]: Start difference. First operand has 50 places, 45 transitions, 171 flow. Second operand 3 states and 369 transitions. [2023-08-03 19:54:35,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 59 transitions, 309 flow [2023-08-03 19:54:35,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 302 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:54:35,816 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 176 flow [2023-08-03 19:54:35,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-03 19:54:35,816 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 10 predicate places. [2023-08-03 19:54:35,816 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 176 flow [2023-08-03 19:54:35,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:35,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:35,817 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:35,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:36,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:36,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:36,022 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:36,022 INFO L85 PathProgramCache]: Analyzing trace with hash 492519684, now seen corresponding path program 1 times [2023-08-03 19:54:36,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:36,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011810911] [2023-08-03 19:54:36,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:36,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:36,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011810911] [2023-08-03 19:54:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011810911] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869802647] [2023-08-03 19:54:36,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:36,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:36,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:36,066 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:36,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-03 19:54:36,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:36,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:54:36,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:36,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:36,146 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-03 19:54:36,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869802647] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:54:36,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:54:36,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:54:36,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755604732] [2023-08-03 19:54:36,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:54:36,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:36,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:36,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-03 19:54:36,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 176 flow. Second operand has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:36,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:36,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-03 19:54:36,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:36,540 INFO L124 PetriNetUnfolderBase]: 5682/7585 cut-off events. [2023-08-03 19:54:36,540 INFO L125 PetriNetUnfolderBase]: For 1241/1241 co-relation queries the response was YES. [2023-08-03 19:54:36,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16360 conditions, 7585 events. 5682/7585 cut-off events. For 1241/1241 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 34601 event pairs, 1645 based on Foata normal form. 27/4832 useless extension candidates. Maximal degree in co-relation 10425. Up to 6552 conditions per place. [2023-08-03 19:54:36,568 INFO L140 encePairwiseOnDemand]: 231/234 looper letters, 49 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-03 19:54:36,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 60 transitions, 304 flow [2023-08-03 19:54:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:36,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 474 transitions. [2023-08-03 19:54:36,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064102564102564 [2023-08-03 19:54:36,570 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 474 transitions. [2023-08-03 19:54:36,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 474 transitions. [2023-08-03 19:54:36,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:36,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 474 transitions. [2023-08-03 19:54:36,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.5) internal successors, (474), 4 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:36,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:36,573 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:36,573 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 176 flow. Second operand 4 states and 474 transitions. [2023-08-03 19:54:36,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 60 transitions, 304 flow [2023-08-03 19:54:36,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 60 transitions, 302 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:36,587 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 172 flow [2023-08-03 19:54:36,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2023-08-03 19:54:36,587 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2023-08-03 19:54:36,587 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 172 flow [2023-08-03 19:54:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:36,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:36,588 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:36,594 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-03 19:54:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:36,793 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:36,793 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1475301376, now seen corresponding path program 1 times [2023-08-03 19:54:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:36,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711125469] [2023-08-03 19:54:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:36,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:54:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711125469] [2023-08-03 19:54:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711125469] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:36,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919504395] [2023-08-03 19:54:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:36,850 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:36,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-03 19:54:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:36,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:54:36,919 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:54:36,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:36,944 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:54:36,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919504395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:54:36,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:54:36,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-03 19:54:36,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803771655] [2023-08-03 19:54:36,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:54:36,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:36,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:36,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:36,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:36,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-03 19:54:36,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:36,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:36,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-03 19:54:36,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:37,291 INFO L124 PetriNetUnfolderBase]: 4136/5529 cut-off events. [2023-08-03 19:54:37,291 INFO L125 PetriNetUnfolderBase]: For 1255/1255 co-relation queries the response was YES. [2023-08-03 19:54:37,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11920 conditions, 5529 events. 4136/5529 cut-off events. For 1255/1255 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22765 event pairs, 747 based on Foata normal form. 108/3585 useless extension candidates. Maximal degree in co-relation 10506. Up to 2080 conditions per place. [2023-08-03 19:54:37,313 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2023-08-03 19:54:37,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 67 transitions, 342 flow [2023-08-03 19:54:37,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:37,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-03 19:54:37,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-03 19:54:37,315 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-03 19:54:37,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-03 19:54:37,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:37,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-03 19:54:37,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:37,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:37,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:37,319 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 172 flow. Second operand 4 states and 481 transitions. [2023-08-03 19:54:37,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 67 transitions, 342 flow [2023-08-03 19:54:37,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 336 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-03 19:54:37,326 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 186 flow [2023-08-03 19:54:37,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-08-03 19:54:37,327 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2023-08-03 19:54:37,327 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 186 flow [2023-08-03 19:54:37,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:37,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:37,328 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:37,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:37,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-03 19:54:37,533 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:37,533 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:37,533 INFO L85 PathProgramCache]: Analyzing trace with hash -606868330, now seen corresponding path program 1 times [2023-08-03 19:54:37,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:37,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091768007] [2023-08-03 19:54:37,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:37,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:37,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:37,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:37,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091768007] [2023-08-03 19:54:37,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091768007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:37,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398032172] [2023-08-03 19:54:37,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:37,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:37,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:37,603 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:37,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-03 19:54:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:37,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-03 19:54:37,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:37,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:37,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:37,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398032172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:54:37,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:54:37,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-03 19:54:37,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493140790] [2023-08-03 19:54:37,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:54:37,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:37,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:37,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:37,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:37,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 234 [2023-08-03 19:54:37,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 46 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:37,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:37,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 234 [2023-08-03 19:54:37,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:38,090 INFO L124 PetriNetUnfolderBase]: 4120/5502 cut-off events. [2023-08-03 19:54:38,090 INFO L125 PetriNetUnfolderBase]: For 2154/2154 co-relation queries the response was YES. [2023-08-03 19:54:38,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12568 conditions, 5502 events. 4120/5502 cut-off events. For 2154/2154 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22561 event pairs, 1861 based on Foata normal form. 13/3471 useless extension candidates. Maximal degree in co-relation 11152. Up to 4661 conditions per place. [2023-08-03 19:54:38,119 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 55 selfloop transitions, 3 changer transitions 2/68 dead transitions. [2023-08-03 19:54:38,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 68 transitions, 358 flow [2023-08-03 19:54:38,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 481 transitions. [2023-08-03 19:54:38,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-08-03 19:54:38,121 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 481 transitions. [2023-08-03 19:54:38,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 481 transitions. [2023-08-03 19:54:38,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:38,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 481 transitions. [2023-08-03 19:54:38,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.25) internal successors, (481), 4 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,125 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,125 INFO L175 Difference]: Start difference. First operand has 55 places, 46 transitions, 186 flow. Second operand 4 states and 481 transitions. [2023-08-03 19:54:38,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 68 transitions, 358 flow [2023-08-03 19:54:38,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 68 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:38,135 INFO L231 Difference]: Finished difference. Result has 59 places, 45 transitions, 190 flow [2023-08-03 19:54:38,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=45} [2023-08-03 19:54:38,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 19:54:38,136 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 45 transitions, 190 flow [2023-08-03 19:54:38,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.4) internal successors, (557), 5 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:38,136 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:38,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:38,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:38,342 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:38,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:38,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1608894921, now seen corresponding path program 1 times [2023-08-03 19:54:38,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:38,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074105533] [2023-08-03 19:54:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:38,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-03 19:54:38,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:38,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074105533] [2023-08-03 19:54:38,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074105533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:38,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:54:38,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-03 19:54:38,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437236395] [2023-08-03 19:54:38,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:38,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-03 19:54:38,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:38,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-03 19:54:38,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-03 19:54:38,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 234 [2023-08-03 19:54:38,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 45 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:38,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 234 [2023-08-03 19:54:38,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:38,932 INFO L124 PetriNetUnfolderBase]: 4907/6387 cut-off events. [2023-08-03 19:54:38,932 INFO L125 PetriNetUnfolderBase]: For 3430/3430 co-relation queries the response was YES. [2023-08-03 19:54:38,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14911 conditions, 6387 events. 4907/6387 cut-off events. For 3430/3430 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 25203 event pairs, 500 based on Foata normal form. 1/3949 useless extension candidates. Maximal degree in co-relation 14623. Up to 5460 conditions per place. [2023-08-03 19:54:38,965 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 65 selfloop transitions, 5 changer transitions 1/79 dead transitions. [2023-08-03 19:54:38,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 79 transitions, 491 flow [2023-08-03 19:54:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-03 19:54:38,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-03 19:54:38,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 385 transitions. [2023-08-03 19:54:38,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5484330484330484 [2023-08-03 19:54:38,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 385 transitions. [2023-08-03 19:54:38,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 385 transitions. [2023-08-03 19:54:38,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:38,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 385 transitions. [2023-08-03 19:54:38,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,969 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 234.0) internal successors, (936), 4 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,969 INFO L175 Difference]: Start difference. First operand has 59 places, 45 transitions, 190 flow. Second operand 3 states and 385 transitions. [2023-08-03 19:54:38,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 79 transitions, 491 flow [2023-08-03 19:54:38,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 79 transitions, 475 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-03 19:54:38,979 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 215 flow [2023-08-03 19:54:38,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2023-08-03 19:54:38,980 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 18 predicate places. [2023-08-03 19:54:38,980 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 215 flow [2023-08-03 19:54:38,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:38,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:38,981 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:38,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-03 19:54:38,981 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:38,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:38,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1166603077, now seen corresponding path program 1 times [2023-08-03 19:54:38,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:38,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038244308] [2023-08-03 19:54:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:38,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:39,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:39,111 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:54:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038244308] [2023-08-03 19:54:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038244308] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:39,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:54:39,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:54:39,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991354329] [2023-08-03 19:54:39,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:39,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:39,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:39,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:39,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:39,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-03 19:54:39,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:39,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:39,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-03 19:54:39,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:40,140 INFO L124 PetriNetUnfolderBase]: 8416/11703 cut-off events. [2023-08-03 19:54:40,141 INFO L125 PetriNetUnfolderBase]: For 8173/8173 co-relation queries the response was YES. [2023-08-03 19:54:40,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31593 conditions, 11703 events. 8416/11703 cut-off events. For 8173/8173 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 62115 event pairs, 2000 based on Foata normal form. 382/12085 useless extension candidates. Maximal degree in co-relation 30903. Up to 4967 conditions per place. [2023-08-03 19:54:40,181 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 133 selfloop transitions, 5 changer transitions 0/144 dead transitions. [2023-08-03 19:54:40,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 144 transitions, 947 flow [2023-08-03 19:54:40,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:54:40,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:54:40,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-03 19:54:40,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-08-03 19:54:40,184 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-03 19:54:40,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-03 19:54:40,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:40,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-03 19:54:40,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:40,187 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:40,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:40,188 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 215 flow. Second operand 5 states and 627 transitions. [2023-08-03 19:54:40,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 144 transitions, 947 flow [2023-08-03 19:54:40,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 144 transitions, 935 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:40,215 INFO L231 Difference]: Finished difference. Result has 65 places, 52 transitions, 249 flow [2023-08-03 19:54:40,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=249, PETRI_PLACES=65, PETRI_TRANSITIONS=52} [2023-08-03 19:54:40,215 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 24 predicate places. [2023-08-03 19:54:40,215 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 52 transitions, 249 flow [2023-08-03 19:54:40,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:40,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:40,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:40,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-03 19:54:40,216 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:40,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:40,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1384138005, now seen corresponding path program 1 times [2023-08-03 19:54:40,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:40,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923840397] [2023-08-03 19:54:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:40,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:54:40,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:40,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923840397] [2023-08-03 19:54:40,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923840397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:40,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407723938] [2023-08-03 19:54:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:40,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:40,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:40,387 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:40,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-03 19:54:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:40,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:54:40,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:54:40,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:54:40,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407723938] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:40,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 19:54:40,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-03 19:54:40,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016374731] [2023-08-03 19:54:40,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:40,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:54:40,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:40,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:54:40,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:54:40,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-03 19:54:40,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 52 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:40,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:40,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-03 19:54:40,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:41,687 INFO L124 PetriNetUnfolderBase]: 10324/14244 cut-off events. [2023-08-03 19:54:41,688 INFO L125 PetriNetUnfolderBase]: For 16505/17094 co-relation queries the response was YES. [2023-08-03 19:54:41,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42907 conditions, 14244 events. 10324/14244 cut-off events. For 16505/17094 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 75857 event pairs, 3406 based on Foata normal form. 387/14530 useless extension candidates. Maximal degree in co-relation 42027. Up to 7214 conditions per place. [2023-08-03 19:54:41,748 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 101 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-03 19:54:41,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 115 transitions, 784 flow [2023-08-03 19:54:41,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:41,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-03 19:54:41,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2023-08-03 19:54:41,750 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-03 19:54:41,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-03 19:54:41,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:41,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-03 19:54:41,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:41,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:41,754 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:41,754 INFO L175 Difference]: Start difference. First operand has 65 places, 52 transitions, 249 flow. Second operand 4 states and 508 transitions. [2023-08-03 19:54:41,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 115 transitions, 784 flow [2023-08-03 19:54:41,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 115 transitions, 770 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:41,799 INFO L231 Difference]: Finished difference. Result has 70 places, 56 transitions, 294 flow [2023-08-03 19:54:41,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=70, PETRI_TRANSITIONS=56} [2023-08-03 19:54:41,800 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 29 predicate places. [2023-08-03 19:54:41,800 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 56 transitions, 294 flow [2023-08-03 19:54:41,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:41,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:41,800 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:41,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:42,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-03 19:54:42,001 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:42,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 662776867, now seen corresponding path program 1 times [2023-08-03 19:54:42,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:42,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557394941] [2023-08-03 19:54:42,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:42,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:54:42,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557394941] [2023-08-03 19:54:42,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557394941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:42,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821995536] [2023-08-03 19:54:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:42,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:42,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:42,097 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:42,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-03 19:54:42,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:42,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:54:42,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:54:42,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:42,255 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:42,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821995536] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:42,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 19:54:42,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-03 19:54:42,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406028868] [2023-08-03 19:54:42,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:42,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:54:42,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:42,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:54:42,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:54:42,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-03 19:54:42,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 56 transitions, 294 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:42,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:42,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-03 19:54:42,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:43,452 INFO L124 PetriNetUnfolderBase]: 12669/17686 cut-off events. [2023-08-03 19:54:43,453 INFO L125 PetriNetUnfolderBase]: For 37741/40855 co-relation queries the response was YES. [2023-08-03 19:54:43,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56498 conditions, 17686 events. 12669/17686 cut-off events. For 37741/40855 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 99698 event pairs, 2903 based on Foata normal form. 2578/20016 useless extension candidates. Maximal degree in co-relation 55293. Up to 9640 conditions per place. [2023-08-03 19:54:43,573 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 100 selfloop transitions, 6 changer transitions 0/115 dead transitions. [2023-08-03 19:54:43,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 115 transitions, 822 flow [2023-08-03 19:54:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:43,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-03 19:54:43,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-08-03 19:54:43,575 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-03 19:54:43,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-03 19:54:43,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:43,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-03 19:54:43,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:43,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:43,578 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:43,579 INFO L175 Difference]: Start difference. First operand has 70 places, 56 transitions, 294 flow. Second operand 4 states and 498 transitions. [2023-08-03 19:54:43,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 115 transitions, 822 flow [2023-08-03 19:54:43,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 115 transitions, 816 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 19:54:43,665 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 338 flow [2023-08-03 19:54:43,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=338, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2023-08-03 19:54:43,665 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2023-08-03 19:54:43,665 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 338 flow [2023-08-03 19:54:43,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:43,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:43,666 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:43,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:43,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-03 19:54:43,871 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:43,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1011794643, now seen corresponding path program 2 times [2023-08-03 19:54:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:43,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682859026] [2023-08-03 19:54:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:43,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:43,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:43,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:43,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682859026] [2023-08-03 19:54:43,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682859026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:43,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745380401] [2023-08-03 19:54:43,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:54:43,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:43,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:43,964 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:43,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-03 19:54:44,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:54:44,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:54:44,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:54:44,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:44,075 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:44,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:44,104 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:54:44,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745380401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:54:44,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:54:44,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2023-08-03 19:54:44,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110172723] [2023-08-03 19:54:44,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:54:44,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-03 19:54:44,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-03 19:54:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-03 19:54:44,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-03 19:54:44,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:44,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:44,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-03 19:54:44,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:46,514 INFO L124 PetriNetUnfolderBase]: 19537/27613 cut-off events. [2023-08-03 19:54:46,514 INFO L125 PetriNetUnfolderBase]: For 63958/66124 co-relation queries the response was YES. [2023-08-03 19:54:46,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97381 conditions, 27613 events. 19537/27613 cut-off events. For 63958/66124 co-relation queries the response was YES. Maximal size of possible extension queue 903. Compared 167636 event pairs, 4950 based on Foata normal form. 1710/29066 useless extension candidates. Maximal degree in co-relation 95456. Up to 9905 conditions per place. [2023-08-03 19:54:46,731 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 210 selfloop transitions, 19 changer transitions 0/236 dead transitions. [2023-08-03 19:54:46,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 236 transitions, 1798 flow [2023-08-03 19:54:46,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-03 19:54:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-03 19:54:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 883 transitions. [2023-08-03 19:54:46,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.539072039072039 [2023-08-03 19:54:46,734 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 883 transitions. [2023-08-03 19:54:46,734 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 883 transitions. [2023-08-03 19:54:46,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:46,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 883 transitions. [2023-08-03 19:54:46,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:46,738 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:46,739 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 234.0) internal successors, (1872), 8 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:46,739 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 338 flow. Second operand 7 states and 883 transitions. [2023-08-03 19:54:46,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 236 transitions, 1798 flow [2023-08-03 19:54:46,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 236 transitions, 1786 flow, removed 6 selfloop flow, removed 0 redundant places. [2023-08-03 19:54:46,937 INFO L231 Difference]: Finished difference. Result has 85 places, 72 transitions, 502 flow [2023-08-03 19:54:46,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=85, PETRI_TRANSITIONS=72} [2023-08-03 19:54:46,938 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 44 predicate places. [2023-08-03 19:54:46,938 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 72 transitions, 502 flow [2023-08-03 19:54:46,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 106.14285714285714) internal successors, (743), 7 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:46,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:46,939 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:46,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:47,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-03 19:54:47,139 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:47,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:47,140 INFO L85 PathProgramCache]: Analyzing trace with hash 20307181, now seen corresponding path program 1 times [2023-08-03 19:54:47,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:47,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28313172] [2023-08-03 19:54:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:47,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:54:47,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:47,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28313172] [2023-08-03 19:54:47,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28313172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:47,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083145559] [2023-08-03 19:54:47,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:47,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:47,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:47,242 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:47,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-03 19:54:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:47,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:54:47,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:54:47,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:47,385 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:54:47,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083145559] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:47,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 19:54:47,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-03 19:54:47,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084337701] [2023-08-03 19:54:47,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:47,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:54:47,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:47,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:54:47,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:54:47,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-03 19:54:47,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 72 transitions, 502 flow. Second operand has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:47,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:47,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-03 19:54:47,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:49,896 INFO L124 PetriNetUnfolderBase]: 18581/26200 cut-off events. [2023-08-03 19:54:49,896 INFO L125 PetriNetUnfolderBase]: For 81421/85812 co-relation queries the response was YES. [2023-08-03 19:54:49,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99882 conditions, 26200 events. 18581/26200 cut-off events. For 81421/85812 co-relation queries the response was YES. Maximal size of possible extension queue 872. Compared 158313 event pairs, 6173 based on Foata normal form. 3062/28901 useless extension candidates. Maximal degree in co-relation 97915. Up to 15530 conditions per place. [2023-08-03 19:54:50,067 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 115 selfloop transitions, 12 changer transitions 0/137 dead transitions. [2023-08-03 19:54:50,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 137 transitions, 1108 flow [2023-08-03 19:54:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:54:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:54:50,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 508 transitions. [2023-08-03 19:54:50,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5427350427350427 [2023-08-03 19:54:50,069 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 508 transitions. [2023-08-03 19:54:50,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 508 transitions. [2023-08-03 19:54:50,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:50,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 508 transitions. [2023-08-03 19:54:50,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.0) internal successors, (508), 4 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:50,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:50,072 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:50,072 INFO L175 Difference]: Start difference. First operand has 85 places, 72 transitions, 502 flow. Second operand 4 states and 508 transitions. [2023-08-03 19:54:50,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 137 transitions, 1108 flow [2023-08-03 19:54:50,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 137 transitions, 1102 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-03 19:54:50,235 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 558 flow [2023-08-03 19:54:50,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2023-08-03 19:54:50,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 49 predicate places. [2023-08-03 19:54:50,236 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 558 flow [2023-08-03 19:54:50,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.25) internal successors, (445), 4 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:50,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:50,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:50,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-03 19:54:50,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-03 19:54:50,442 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:50,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:50,442 INFO L85 PathProgramCache]: Analyzing trace with hash 749402791, now seen corresponding path program 2 times [2023-08-03 19:54:50,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:50,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147240614] [2023-08-03 19:54:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:50,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:54:50,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147240614] [2023-08-03 19:54:50,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147240614] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:54:50,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040528409] [2023-08-03 19:54:50,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:54:50,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:50,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:54:50,550 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:54:50,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-03 19:54:50,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:54:50,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:54:50,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:54:50,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:54:50,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:54:50,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:54:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:54:50,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040528409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:54:50,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:54:50,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 19:54:50,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257246337] [2023-08-03 19:54:50,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:54:50,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:54:50,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:54:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:54:50,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-03 19:54:50,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 558 flow. Second operand has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:50,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:50,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-03 19:54:50,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:54:55,107 INFO L124 PetriNetUnfolderBase]: 34592/48837 cut-off events. [2023-08-03 19:54:55,107 INFO L125 PetriNetUnfolderBase]: For 232109/249216 co-relation queries the response was YES. [2023-08-03 19:54:55,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194289 conditions, 48837 events. 34592/48837 cut-off events. For 232109/249216 co-relation queries the response was YES. Maximal size of possible extension queue 1544. Compared 319144 event pairs, 7776 based on Foata normal form. 6733/54701 useless extension candidates. Maximal degree in co-relation 190400. Up to 20102 conditions per place. [2023-08-03 19:54:55,434 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 174 selfloop transitions, 15 changer transitions 0/200 dead transitions. [2023-08-03 19:54:55,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 200 transitions, 1939 flow [2023-08-03 19:54:55,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:54:55,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:54:55,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 613 transitions. [2023-08-03 19:54:55,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.523931623931624 [2023-08-03 19:54:55,436 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 613 transitions. [2023-08-03 19:54:55,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 613 transitions. [2023-08-03 19:54:55,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:54:55,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 613 transitions. [2023-08-03 19:54:55,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.6) internal successors, (613), 5 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:55,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:55,439 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:55,439 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 558 flow. Second operand 5 states and 613 transitions. [2023-08-03 19:54:55,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 200 transitions, 1939 flow [2023-08-03 19:54:55,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 200 transitions, 1885 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-03 19:54:55,870 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 668 flow [2023-08-03 19:54:55,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=668, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2023-08-03 19:54:55,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 54 predicate places. [2023-08-03 19:54:55,871 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 668 flow [2023-08-03 19:54:55,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.375) internal successors, (843), 8 states have internal predecessors, (843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:55,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:54:55,871 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:54:55,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-03 19:54:56,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:54:56,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:54:56,072 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:54:56,072 INFO L85 PathProgramCache]: Analyzing trace with hash -988928968, now seen corresponding path program 1 times [2023-08-03 19:54:56,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:54:56,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199401393] [2023-08-03 19:54:56,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:54:56,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:54:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:54:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:54:56,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:54:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199401393] [2023-08-03 19:54:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199401393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:54:56,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:54:56,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:54:56,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171039596] [2023-08-03 19:54:56,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:54:56,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:54:56,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:54:56,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:54:56,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:54:56,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-03 19:54:56,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 668 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:54:56,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:54:56,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-03 19:54:56,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:01,606 INFO L124 PetriNetUnfolderBase]: 40899/59182 cut-off events. [2023-08-03 19:55:01,606 INFO L125 PetriNetUnfolderBase]: For 298474/319108 co-relation queries the response was YES. [2023-08-03 19:55:01,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249610 conditions, 59182 events. 40899/59182 cut-off events. For 298474/319108 co-relation queries the response was YES. Maximal size of possible extension queue 1954. Compared 417279 event pairs, 10623 based on Foata normal form. 9383/67484 useless extension candidates. Maximal degree in co-relation 244126. Up to 29921 conditions per place. [2023-08-03 19:55:02,051 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 189 selfloop transitions, 11 changer transitions 0/211 dead transitions. [2023-08-03 19:55:02,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 211 transitions, 2094 flow [2023-08-03 19:55:02,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:55:02,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:55:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 616 transitions. [2023-08-03 19:55:02,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264957264957265 [2023-08-03 19:55:02,053 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 616 transitions. [2023-08-03 19:55:02,053 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 616 transitions. [2023-08-03 19:55:02,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:02,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 616 transitions. [2023-08-03 19:55:02,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.2) internal successors, (616), 5 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:02,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:02,057 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:02,057 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 668 flow. Second operand 5 states and 616 transitions. [2023-08-03 19:55:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 211 transitions, 2094 flow [2023-08-03 19:55:03,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 211 transitions, 2094 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-03 19:55:03,065 INFO L231 Difference]: Finished difference. Result has 102 places, 87 transitions, 740 flow [2023-08-03 19:55:03,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=668, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=740, PETRI_PLACES=102, PETRI_TRANSITIONS=87} [2023-08-03 19:55:03,065 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 61 predicate places. [2023-08-03 19:55:03,065 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 87 transitions, 740 flow [2023-08-03 19:55:03,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:03,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:03,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-03 19:55:03,066 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:03,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:03,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1700034080, now seen corresponding path program 2 times [2023-08-03 19:55:03,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:03,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836551914] [2023-08-03 19:55:03,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:03,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:55:03,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836551914] [2023-08-03 19:55:03,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836551914] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:55:03,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895974390] [2023-08-03 19:55:03,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:55:03,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:55:03,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:55:03,154 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:55:03,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-03 19:55:03,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:55:03,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:55:03,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:55:03,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:55:03,290 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:55:03,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:55:03,327 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:55:03,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895974390] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-03 19:55:03,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-03 19:55:03,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 6 [2023-08-03 19:55:03,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157647877] [2023-08-03 19:55:03,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:55:03,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-03 19:55:03,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:03,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-03 19:55:03,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-03 19:55:03,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 234 [2023-08-03 19:55:03,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 87 transitions, 740 flow. Second operand has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:03,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:03,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 234 [2023-08-03 19:55:03,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:08,668 INFO L124 PetriNetUnfolderBase]: 39118/56758 cut-off events. [2023-08-03 19:55:08,668 INFO L125 PetriNetUnfolderBase]: For 303137/324859 co-relation queries the response was YES. [2023-08-03 19:55:08,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257847 conditions, 56758 events. 39118/56758 cut-off events. For 303137/324859 co-relation queries the response was YES. Maximal size of possible extension queue 1997. Compared 401050 event pairs, 11531 based on Foata normal form. 8733/64057 useless extension candidates. Maximal degree in co-relation 252197. Up to 31740 conditions per place. [2023-08-03 19:55:09,123 INFO L140 encePairwiseOnDemand]: 230/234 looper letters, 131 selfloop transitions, 12 changer transitions 0/157 dead transitions. [2023-08-03 19:55:09,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 157 transitions, 1532 flow [2023-08-03 19:55:09,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-03 19:55:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-03 19:55:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-03 19:55:09,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-08-03 19:55:09,125 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-03 19:55:09,125 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-03 19:55:09,125 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:09,125 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-03 19:55:09,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:09,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:09,128 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 234.0) internal successors, (1170), 5 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:09,128 INFO L175 Difference]: Start difference. First operand has 102 places, 87 transitions, 740 flow. Second operand 4 states and 498 transitions. [2023-08-03 19:55:09,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 157 transitions, 1532 flow [2023-08-03 19:55:09,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 157 transitions, 1505 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-03 19:55:09,909 INFO L231 Difference]: Finished difference. Result has 106 places, 89 transitions, 775 flow [2023-08-03 19:55:09,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=775, PETRI_PLACES=106, PETRI_TRANSITIONS=89} [2023-08-03 19:55:09,910 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 65 predicate places. [2023-08-03 19:55:09,910 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 89 transitions, 775 flow [2023-08-03 19:55:09,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:09,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:09,910 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:09,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-03 19:55:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:55:10,115 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:10,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1595013353, now seen corresponding path program 3 times [2023-08-03 19:55:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:10,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350514263] [2023-08-03 19:55:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-03 19:55:10,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:10,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350514263] [2023-08-03 19:55:10,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350514263] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:55:10,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:55:10,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:55:10,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646773929] [2023-08-03 19:55:10,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:55:10,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:55:10,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:10,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:55:10,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:55:10,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-03 19:55:10,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 89 transitions, 775 flow. Second operand has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:10,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:10,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-03 19:55:10,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:16,611 INFO L124 PetriNetUnfolderBase]: 42413/61451 cut-off events. [2023-08-03 19:55:16,611 INFO L125 PetriNetUnfolderBase]: For 356490/377991 co-relation queries the response was YES. [2023-08-03 19:55:16,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280150 conditions, 61451 events. 42413/61451 cut-off events. For 356490/377991 co-relation queries the response was YES. Maximal size of possible extension queue 2055. Compared 437137 event pairs, 11810 based on Foata normal form. 8411/68737 useless extension candidates. Maximal degree in co-relation 274354. Up to 30142 conditions per place. [2023-08-03 19:55:17,110 INFO L140 encePairwiseOnDemand]: 228/234 looper letters, 213 selfloop transitions, 18 changer transitions 0/242 dead transitions. [2023-08-03 19:55:17,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 242 transitions, 2512 flow [2023-08-03 19:55:17,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-03 19:55:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-03 19:55:17,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 728 transitions. [2023-08-03 19:55:17,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2023-08-03 19:55:17,113 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 728 transitions. [2023-08-03 19:55:17,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 728 transitions. [2023-08-03 19:55:17,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:17,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 728 transitions. [2023-08-03 19:55:17,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 121.33333333333333) internal successors, (728), 6 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:17,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:17,116 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 234.0) internal successors, (1638), 7 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:17,116 INFO L175 Difference]: Start difference. First operand has 106 places, 89 transitions, 775 flow. Second operand 6 states and 728 transitions. [2023-08-03 19:55:17,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 242 transitions, 2512 flow [2023-08-03 19:55:18,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 242 transitions, 2496 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-03 19:55:18,600 INFO L231 Difference]: Finished difference. Result has 112 places, 95 transitions, 892 flow [2023-08-03 19:55:18,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=892, PETRI_PLACES=112, PETRI_TRANSITIONS=95} [2023-08-03 19:55:18,600 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2023-08-03 19:55:18,601 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 95 transitions, 892 flow [2023-08-03 19:55:18,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.0) internal successors, (535), 5 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:18,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:18,601 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:18,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-03 19:55:18,601 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:18,601 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1966984782, now seen corresponding path program 3 times [2023-08-03 19:55:18,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:18,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063447375] [2023-08-03 19:55:18,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:18,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:18,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 19:55:18,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063447375] [2023-08-03 19:55:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063447375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:55:18,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194416293] [2023-08-03 19:55:18,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-03 19:55:18,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:55:18,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:55:18,690 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:55:18,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-03 19:55:18,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-03 19:55:18,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:55:18,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:55:18,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:55:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 19:55:18,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:55:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-08-03 19:55:19,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194416293] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:55:19,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:55:19,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 19:55:19,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223412226] [2023-08-03 19:55:19,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:55:19,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:55:19,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:19,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:55:19,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:55:19,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-03 19:55:19,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 95 transitions, 892 flow. Second operand has 8 states, 8 states have (on average 105.25) internal successors, (842), 8 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:19,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:19,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-03 19:55:19,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:24,802 INFO L124 PetriNetUnfolderBase]: 41420/59687 cut-off events. [2023-08-03 19:55:24,803 INFO L125 PetriNetUnfolderBase]: For 361331/382019 co-relation queries the response was YES. [2023-08-03 19:55:25,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 288442 conditions, 59687 events. 41420/59687 cut-off events. For 361331/382019 co-relation queries the response was YES. Maximal size of possible extension queue 1980. Compared 418199 event pairs, 11792 based on Foata normal form. 8311/66913 useless extension candidates. Maximal degree in co-relation 283103. Up to 30797 conditions per place. [2023-08-03 19:55:25,598 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 180 selfloop transitions, 19 changer transitions 0/210 dead transitions. [2023-08-03 19:55:25,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 210 transitions, 2214 flow [2023-08-03 19:55:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:55:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:55:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-03 19:55:25,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-03 19:55:25,599 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-03 19:55:25,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-03 19:55:25,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:25,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-03 19:55:25,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:25,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:25,602 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:25,602 INFO L175 Difference]: Start difference. First operand has 112 places, 95 transitions, 892 flow. Second operand 5 states and 612 transitions. [2023-08-03 19:55:25,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 210 transitions, 2214 flow [2023-08-03 19:55:27,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 210 transitions, 2168 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-08-03 19:55:27,959 INFO L231 Difference]: Finished difference. Result has 116 places, 97 transitions, 931 flow [2023-08-03 19:55:27,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=851, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=931, PETRI_PLACES=116, PETRI_TRANSITIONS=97} [2023-08-03 19:55:27,959 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2023-08-03 19:55:27,959 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 97 transitions, 931 flow [2023-08-03 19:55:27,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.25) internal successors, (842), 8 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:27,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:27,960 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:27,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-03 19:55:28,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-03 19:55:28,161 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:28,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1147289265, now seen corresponding path program 4 times [2023-08-03 19:55:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457736942] [2023-08-03 19:55:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:28,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:28,278 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:55:28,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:28,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457736942] [2023-08-03 19:55:28,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457736942] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:55:28,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:55:28,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:55:28,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978966411] [2023-08-03 19:55:28,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:55:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:55:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:28,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:55:28,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:55:28,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-03 19:55:28,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 97 transitions, 931 flow. Second operand has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 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) [2023-08-03 19:55:28,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:28,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-03 19:55:28,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:33,966 INFO L124 PetriNetUnfolderBase]: 40552/58714 cut-off events. [2023-08-03 19:55:33,966 INFO L125 PetriNetUnfolderBase]: For 407013/427617 co-relation queries the response was YES. [2023-08-03 19:55:34,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 286355 conditions, 58714 events. 40552/58714 cut-off events. For 407013/427617 co-relation queries the response was YES. Maximal size of possible extension queue 1967. Compared 413350 event pairs, 9658 based on Foata normal form. 8461/66090 useless extension candidates. Maximal degree in co-relation 281125. Up to 27043 conditions per place. [2023-08-03 19:55:34,463 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 183 selfloop transitions, 16 changer transitions 0/210 dead transitions. [2023-08-03 19:55:34,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 210 transitions, 2257 flow [2023-08-03 19:55:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:55:34,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:55:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 612 transitions. [2023-08-03 19:55:34,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230769230769231 [2023-08-03 19:55:34,465 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 612 transitions. [2023-08-03 19:55:34,465 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 612 transitions. [2023-08-03 19:55:34,465 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:34,465 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 612 transitions. [2023-08-03 19:55:34,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 122.4) internal successors, (612), 5 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:34,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:34,468 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:34,468 INFO L175 Difference]: Start difference. First operand has 116 places, 97 transitions, 931 flow. Second operand 5 states and 612 transitions. [2023-08-03 19:55:34,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 210 transitions, 2257 flow [2023-08-03 19:55:36,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 210 transitions, 2234 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-03 19:55:36,612 INFO L231 Difference]: Finished difference. Result has 121 places, 99 transitions, 991 flow [2023-08-03 19:55:36,612 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=991, PETRI_PLACES=121, PETRI_TRANSITIONS=99} [2023-08-03 19:55:36,612 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 80 predicate places. [2023-08-03 19:55:36,612 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 99 transitions, 991 flow [2023-08-03 19:55:36,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 108.0) internal successors, (540), 5 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) [2023-08-03 19:55:36,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:36,613 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:36,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-03 19:55:36,613 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:36,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:36,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1550770341, now seen corresponding path program 1 times [2023-08-03 19:55:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:36,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146055383] [2023-08-03 19:55:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:55:36,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:36,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146055383] [2023-08-03 19:55:36,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146055383] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-03 19:55:36,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-03 19:55:36,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-03 19:55:36,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800902986] [2023-08-03 19:55:36,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-03 19:55:36,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-03 19:55:36,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:36,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-03 19:55:36,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-03 19:55:36,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 234 [2023-08-03 19:55:36,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 99 transitions, 991 flow. Second operand has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:36,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:36,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 234 [2023-08-03 19:55:36,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:43,063 INFO L124 PetriNetUnfolderBase]: 40888/60511 cut-off events. [2023-08-03 19:55:43,063 INFO L125 PetriNetUnfolderBase]: For 456244/481225 co-relation queries the response was YES. [2023-08-03 19:55:43,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301468 conditions, 60511 events. 40888/60511 cut-off events. For 456244/481225 co-relation queries the response was YES. Maximal size of possible extension queue 2165. Compared 450580 event pairs, 11227 based on Foata normal form. 8916/68664 useless extension candidates. Maximal degree in co-relation 295829. Up to 28834 conditions per place. [2023-08-03 19:55:43,621 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 233 selfloop transitions, 12 changer transitions 5/262 dead transitions. [2023-08-03 19:55:43,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 262 transitions, 3035 flow [2023-08-03 19:55:43,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:55:43,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:55:43,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 631 transitions. [2023-08-03 19:55:43,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5393162393162393 [2023-08-03 19:55:43,623 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 631 transitions. [2023-08-03 19:55:43,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 631 transitions. [2023-08-03 19:55:43,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:43,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 631 transitions. [2023-08-03 19:55:43,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.2) internal successors, (631), 5 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:43,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:43,626 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:43,626 INFO L175 Difference]: Start difference. First operand has 121 places, 99 transitions, 991 flow. Second operand 5 states and 631 transitions. [2023-08-03 19:55:43,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 262 transitions, 3035 flow [2023-08-03 19:55:45,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 262 transitions, 2954 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-03 19:55:45,488 INFO L231 Difference]: Finished difference. Result has 127 places, 101 transitions, 1035 flow [2023-08-03 19:55:45,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1035, PETRI_PLACES=127, PETRI_TRANSITIONS=101} [2023-08-03 19:55:45,488 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 86 predicate places. [2023-08-03 19:55:45,488 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 101 transitions, 1035 flow [2023-08-03 19:55:45,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:45,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:45,489 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:45,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-08-03 19:55:45,489 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:45,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:45,489 INFO L85 PathProgramCache]: Analyzing trace with hash -197177969, now seen corresponding path program 2 times [2023-08-03 19:55:45,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:45,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095488879] [2023-08-03 19:55:45,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:45,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:55:45,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095488879] [2023-08-03 19:55:45,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095488879] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:55:45,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498732205] [2023-08-03 19:55:45,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:55:45,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:55:45,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:55:45,575 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:55:45,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-03 19:55:45,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:55:45,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:55:45,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:55:45,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:55:45,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:55:45,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:55:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-03 19:55:45,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498732205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:55:45,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:55:45,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 19:55:45,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124447274] [2023-08-03 19:55:45,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:55:45,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:55:45,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:55:45,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:55:45,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-03 19:55:45,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 101 transitions, 1035 flow. Second operand has 8 states, 8 states have (on average 105.25) internal successors, (842), 8 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:45,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:45,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-03 19:55:45,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:55:52,148 INFO L124 PetriNetUnfolderBase]: 40058/59107 cut-off events. [2023-08-03 19:55:52,149 INFO L125 PetriNetUnfolderBase]: For 458462/481990 co-relation queries the response was YES. [2023-08-03 19:55:52,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304833 conditions, 59107 events. 40058/59107 cut-off events. For 458462/481990 co-relation queries the response was YES. Maximal size of possible extension queue 2106. Compared 435231 event pairs, 12418 based on Foata normal form. 7666/66016 useless extension candidates. Maximal degree in co-relation 299600. Up to 29458 conditions per place. [2023-08-03 19:55:52,719 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 225 selfloop transitions, 18 changer transitions 0/255 dead transitions. [2023-08-03 19:55:52,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 255 transitions, 2892 flow [2023-08-03 19:55:52,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:55:52,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:55:52,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 627 transitions. [2023-08-03 19:55:52,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5358974358974359 [2023-08-03 19:55:52,720 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 627 transitions. [2023-08-03 19:55:52,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 627 transitions. [2023-08-03 19:55:52,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:55:52,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 627 transitions. [2023-08-03 19:55:52,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.4) internal successors, (627), 5 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:52,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:52,723 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:52,723 INFO L175 Difference]: Start difference. First operand has 127 places, 101 transitions, 1035 flow. Second operand 5 states and 627 transitions. [2023-08-03 19:55:52,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 255 transitions, 2892 flow [2023-08-03 19:55:54,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 255 transitions, 2867 flow, removed 7 selfloop flow, removed 1 redundant places. [2023-08-03 19:55:54,564 INFO L231 Difference]: Finished difference. Result has 132 places, 103 transitions, 1089 flow [2023-08-03 19:55:54,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1089, PETRI_PLACES=132, PETRI_TRANSITIONS=103} [2023-08-03 19:55:54,565 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 91 predicate places. [2023-08-03 19:55:54,565 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 103 transitions, 1089 flow [2023-08-03 19:55:54,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.25) internal successors, (842), 8 states have internal predecessors, (842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:54,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:55:54,565 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:55:54,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-03 19:55:54,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-03 19:55:54,766 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:55:54,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:55:54,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1506292543, now seen corresponding path program 2 times [2023-08-03 19:55:54,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:55:54,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372669913] [2023-08-03 19:55:54,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:55:54,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:55:54,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:55:54,849 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:55:54,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:55:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372669913] [2023-08-03 19:55:54,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372669913] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:55:54,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123986011] [2023-08-03 19:55:54,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:55:54,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:55:54,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:55:54,851 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:55:54,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-03 19:55:54,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:55:54,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:55:54,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-03 19:55:54,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:55:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:55:54,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:55:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:55:55,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123986011] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:55:55,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:55:55,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-03 19:55:55,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201924883] [2023-08-03 19:55:55,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:55:55,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-03 19:55:55,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:55:55,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-03 19:55:55,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-03 19:55:55,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 234 [2023-08-03 19:55:55,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 103 transitions, 1089 flow. Second operand has 8 states, 8 states have (on average 106.75) internal successors, (854), 8 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:55:55,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:55:55,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 234 [2023-08-03 19:55:55,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:56:01,344 INFO L124 PetriNetUnfolderBase]: 37426/54884 cut-off events. [2023-08-03 19:56:01,345 INFO L125 PetriNetUnfolderBase]: For 456128/478119 co-relation queries the response was YES. [2023-08-03 19:56:01,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291131 conditions, 54884 events. 37426/54884 cut-off events. For 456128/478119 co-relation queries the response was YES. Maximal size of possible extension queue 1945. Compared 398801 event pairs, 9876 based on Foata normal form. 7148/61343 useless extension candidates. Maximal degree in co-relation 286480. Up to 23833 conditions per place. [2023-08-03 19:56:01,866 INFO L140 encePairwiseOnDemand]: 229/234 looper letters, 221 selfloop transitions, 21 changer transitions 0/254 dead transitions. [2023-08-03 19:56:01,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 254 transitions, 2959 flow [2023-08-03 19:56:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-03 19:56:01,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-03 19:56:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 625 transitions. [2023-08-03 19:56:01,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341880341880342 [2023-08-03 19:56:01,867 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 625 transitions. [2023-08-03 19:56:01,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 625 transitions. [2023-08-03 19:56:01,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:56:01,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 625 transitions. [2023-08-03 19:56:01,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:01,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:01,869 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 234.0) internal successors, (1404), 6 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:01,869 INFO L175 Difference]: Start difference. First operand has 132 places, 103 transitions, 1089 flow. Second operand 5 states and 625 transitions. [2023-08-03 19:56:01,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 254 transitions, 2959 flow [2023-08-03 19:56:03,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 254 transitions, 2917 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-03 19:56:03,658 INFO L231 Difference]: Finished difference. Result has 135 places, 105 transitions, 1149 flow [2023-08-03 19:56:03,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1051, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1149, PETRI_PLACES=135, PETRI_TRANSITIONS=105} [2023-08-03 19:56:03,659 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 94 predicate places. [2023-08-03 19:56:03,659 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 105 transitions, 1149 flow [2023-08-03 19:56:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 106.75) internal successors, (854), 8 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:03,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:56:03,659 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:56:03,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-03 19:56:03,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-03 19:56:03,861 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:56:03,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:56:03,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1945327018, now seen corresponding path program 1 times [2023-08-03 19:56:03,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:56:03,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928763672] [2023-08-03 19:56:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:56:03,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:56:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:56:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:56:04,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:56:04,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928763672] [2023-08-03 19:56:04,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928763672] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:56:04,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687555786] [2023-08-03 19:56:04,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:56:04,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:56:04,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:56:04,418 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:56:04,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-03 19:56:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:56:04,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-03 19:56:04,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:56:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 19:56:04,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:56:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-03 19:56:05,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687555786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:56:05,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:56:05,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 6] total 15 [2023-08-03 19:56:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506492713] [2023-08-03 19:56:05,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:56:05,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-03 19:56:05,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:56:05,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-03 19:56:05,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-08-03 19:56:05,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 234 [2023-08-03 19:56:05,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 105 transitions, 1149 flow. Second operand has 17 states, 17 states have (on average 97.11764705882354) internal successors, (1651), 17 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:05,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:56:05,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 234 [2023-08-03 19:56:05,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:56:08,552 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-03 19:56:15,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-03 19:56:19,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-03 19:56:24,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [1] [2023-08-03 19:56:40,603 INFO L124 PetriNetUnfolderBase]: 66407/102181 cut-off events. [2023-08-03 19:56:40,604 INFO L125 PetriNetUnfolderBase]: For 794420/812962 co-relation queries the response was YES. [2023-08-03 19:56:41,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524111 conditions, 102181 events. 66407/102181 cut-off events. For 794420/812962 co-relation queries the response was YES. Maximal size of possible extension queue 3442. Compared 852567 event pairs, 14515 based on Foata normal form. 14463/115859 useless extension candidates. Maximal degree in co-relation 512009. Up to 44570 conditions per place. [2023-08-03 19:56:41,903 INFO L140 encePairwiseOnDemand]: 224/234 looper letters, 288 selfloop transitions, 67 changer transitions 141/508 dead transitions. [2023-08-03 19:56:41,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 508 transitions, 5067 flow [2023-08-03 19:56:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-03 19:56:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-03 19:56:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1723 transitions. [2023-08-03 19:56:41,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908831908831909 [2023-08-03 19:56:41,905 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1723 transitions. [2023-08-03 19:56:41,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1723 transitions. [2023-08-03 19:56:41,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:56:41,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1723 transitions. [2023-08-03 19:56:41,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 114.86666666666666) internal successors, (1723), 15 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:41,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 234.0) internal successors, (3744), 16 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:41,910 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 234.0) internal successors, (3744), 16 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:41,910 INFO L175 Difference]: Start difference. First operand has 135 places, 105 transitions, 1149 flow. Second operand 15 states and 1723 transitions. [2023-08-03 19:56:41,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 508 transitions, 5067 flow [2023-08-03 19:56:50,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 508 transitions, 5005 flow, removed 16 selfloop flow, removed 2 redundant places. [2023-08-03 19:56:50,044 INFO L231 Difference]: Finished difference. Result has 158 places, 159 transitions, 2111 flow [2023-08-03 19:56:50,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2111, PETRI_PLACES=158, PETRI_TRANSITIONS=159} [2023-08-03 19:56:50,044 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2023-08-03 19:56:50,044 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 159 transitions, 2111 flow [2023-08-03 19:56:50,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 97.11764705882354) internal successors, (1651), 17 states have internal predecessors, (1651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:50,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:56:50,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:56:50,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-03 19:56:50,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:56:50,246 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:56:50,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:56:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash -307391071, now seen corresponding path program 1 times [2023-08-03 19:56:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:56:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249339916] [2023-08-03 19:56:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:56:50,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:56:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:56:50,834 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:56:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:56:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249339916] [2023-08-03 19:56:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249339916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:56:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520809477] [2023-08-03 19:56:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:56:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:56:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:56:50,838 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:56:50,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-03 19:56:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:56:50,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-03 19:56:50,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:56:50,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-03 19:56:51,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-03 19:56:51,038 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2023-08-03 19:56:51,174 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2023-08-03 19:56:51,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:56:51,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:56:51,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 85 [2023-08-03 19:56:51,905 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 264 [2023-08-03 19:56:51,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 69 [2023-08-03 19:56:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-03 19:56:51,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520809477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:56:51,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:56:51,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-08-03 19:56:51,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658951201] [2023-08-03 19:56:51,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:56:51,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-03 19:56:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:56:51,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-03 19:56:51,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-08-03 19:56:52,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 234 [2023-08-03 19:56:52,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 159 transitions, 2111 flow. Second operand has 18 states, 18 states have (on average 97.55555555555556) internal successors, (1756), 18 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:56:52,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:56:52,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 234 [2023-08-03 19:56:52,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:57:05,938 INFO L124 PetriNetUnfolderBase]: 51666/80749 cut-off events. [2023-08-03 19:57:05,939 INFO L125 PetriNetUnfolderBase]: For 794914/838897 co-relation queries the response was YES. [2023-08-03 19:57:06,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435021 conditions, 80749 events. 51666/80749 cut-off events. For 794914/838897 co-relation queries the response was YES. Maximal size of possible extension queue 2934. Compared 675588 event pairs, 7792 based on Foata normal form. 20742/100088 useless extension candidates. Maximal degree in co-relation 434814. Up to 58288 conditions per place. [2023-08-03 19:57:07,222 INFO L140 encePairwiseOnDemand]: 223/234 looper letters, 574 selfloop transitions, 11 changer transitions 2/610 dead transitions. [2023-08-03 19:57:07,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 610 transitions, 9858 flow [2023-08-03 19:57:07,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-03 19:57:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-03 19:57:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1129 transitions. [2023-08-03 19:57:07,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4386169386169386 [2023-08-03 19:57:07,224 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1129 transitions. [2023-08-03 19:57:07,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1129 transitions. [2023-08-03 19:57:07,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:57:07,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1129 transitions. [2023-08-03 19:57:07,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 102.63636363636364) internal successors, (1129), 11 states have internal predecessors, (1129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:07,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:07,227 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 234.0) internal successors, (2808), 12 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:07,227 INFO L175 Difference]: Start difference. First operand has 158 places, 159 transitions, 2111 flow. Second operand 11 states and 1129 transitions. [2023-08-03 19:57:07,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 610 transitions, 9858 flow [2023-08-03 19:57:11,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 610 transitions, 9335 flow, removed 194 selfloop flow, removed 4 redundant places. [2023-08-03 19:57:11,053 INFO L231 Difference]: Finished difference. Result has 164 places, 163 transitions, 2037 flow [2023-08-03 19:57:11,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2037, PETRI_PLACES=164, PETRI_TRANSITIONS=163} [2023-08-03 19:57:11,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2023-08-03 19:57:11,054 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 163 transitions, 2037 flow [2023-08-03 19:57:11,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 97.55555555555556) internal successors, (1756), 18 states have internal predecessors, (1756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:11,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:57:11,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:57:11,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-03 19:57:11,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-03 19:57:11,259 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:57:11,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:57:11,260 INFO L85 PathProgramCache]: Analyzing trace with hash 605061837, now seen corresponding path program 2 times [2023-08-03 19:57:11,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:57:11,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154180246] [2023-08-03 19:57:11,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:57:11,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:57:11,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:57:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 19:57:11,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:57:11,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154180246] [2023-08-03 19:57:11,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154180246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:57:11,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648292560] [2023-08-03 19:57:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-03 19:57:11,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:57:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:57:11,645 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:57:11,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-03 19:57:11,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-03 19:57:11,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-03 19:57:11,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-03 19:57:11,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:57:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-03 19:57:12,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:57:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-03 19:57:12,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648292560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:57:12,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:57:12,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 3] total 11 [2023-08-03 19:57:12,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412518020] [2023-08-03 19:57:12,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:57:12,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-03 19:57:12,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:57:12,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-03 19:57:12,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-08-03 19:57:12,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 234 [2023-08-03 19:57:12,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 163 transitions, 2037 flow. Second operand has 13 states, 13 states have (on average 104.3076923076923) internal successors, (1356), 13 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:12,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:57:12,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 234 [2023-08-03 19:57:12,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-03 19:57:35,449 INFO L124 PetriNetUnfolderBase]: 106059/161446 cut-off events. [2023-08-03 19:57:35,449 INFO L125 PetriNetUnfolderBase]: For 1260626/1301819 co-relation queries the response was YES. [2023-08-03 19:57:36,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 877713 conditions, 161446 events. 106059/161446 cut-off events. For 1260626/1301819 co-relation queries the response was YES. Maximal size of possible extension queue 5561. Compared 1404742 event pairs, 10915 based on Foata normal form. 27708/187540 useless extension candidates. Maximal degree in co-relation 858138. Up to 78892 conditions per place. [2023-08-03 19:57:37,771 INFO L140 encePairwiseOnDemand]: 226/234 looper letters, 406 selfloop transitions, 228 changer transitions 25/680 dead transitions. [2023-08-03 19:57:37,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 680 transitions, 7830 flow [2023-08-03 19:57:37,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-03 19:57:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-03 19:57:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1916 transitions. [2023-08-03 19:57:37,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117521367521367 [2023-08-03 19:57:37,774 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1916 transitions. [2023-08-03 19:57:37,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1916 transitions. [2023-08-03 19:57:37,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-03 19:57:37,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1916 transitions. [2023-08-03 19:57:37,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 119.75) internal successors, (1916), 16 states have internal predecessors, (1916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:37,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 234.0) internal successors, (3978), 17 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:37,779 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 234.0) internal successors, (3978), 17 states have internal predecessors, (3978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:57:37,779 INFO L175 Difference]: Start difference. First operand has 164 places, 163 transitions, 2037 flow. Second operand 16 states and 1916 transitions. [2023-08-03 19:57:37,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 680 transitions, 7830 flow [2023-08-03 19:58:04,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 680 transitions, 7645 flow, removed 46 selfloop flow, removed 6 redundant places. [2023-08-03 19:58:04,133 INFO L231 Difference]: Finished difference. Result has 182 places, 352 transitions, 5175 flow [2023-08-03 19:58:04,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=234, PETRI_DIFFERENCE_MINUEND_FLOW=2018, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5175, PETRI_PLACES=182, PETRI_TRANSITIONS=352} [2023-08-03 19:58:04,134 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 141 predicate places. [2023-08-03 19:58:04,134 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 352 transitions, 5175 flow [2023-08-03 19:58:04,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 104.3076923076923) internal successors, (1356), 13 states have internal predecessors, (1356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:58:04,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-03 19:58:04,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-03 19:58:04,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-03 19:58:04,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:58:04,337 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-03 19:58:04,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-03 19:58:04,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1195863383, now seen corresponding path program 1 times [2023-08-03 19:58:04,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-03 19:58:04,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416411584] [2023-08-03 19:58:04,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:58:04,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-03 19:58:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:58:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:58:04,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-03 19:58:04,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416411584] [2023-08-03 19:58:04,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416411584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-03 19:58:04,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851335095] [2023-08-03 19:58:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-03 19:58:04,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-03 19:58:04,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-03 19:58:04,872 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-03 19:58:04,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-03 19:58:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-03 19:58:04,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-03 19:58:04,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-03 19:58:04,980 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-08-03 19:58:04,996 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-03 19:58:05,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2023-08-03 19:58:05,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-03 19:58:05,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-03 19:58:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-03 19:58:05,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-03 19:58:06,712 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_#pthreadsForks| 1)) (.cse0 (+ 4294967296 |c_#pthreadsForks|)) (.cse2 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4))) (and (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= .cse0 (mod (select .cse1 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (not (= (mod (select .cse1 .cse2) 4294967296) .cse3))))) (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse4 (mod (select .cse5 .cse2) 4294967296))) (or (not (= .cse4 .cse3)) (not (= (mod (select .cse5 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) |c_#pthreadsForks|)) (< 2147483647 .cse4))))) (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse7 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse6 (mod (select .cse7 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= .cse0 .cse6)) (<= .cse6 2147483647) (not (= (mod (select .cse7 .cse2) 4294967296) (+ 4294967297 |c_#pthreadsForks|))))))))) is different from false [2023-08-03 19:58:06,865 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_#pthreadsForks|)) (.cse3 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4)) (.cse7 (+ 4294967297 |c_#pthreadsForks|)) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4)) |c_#pthreadsForks|)))) (and (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse2 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse1 (mod (select .cse2 .cse3) 4294967296))) (or (not (= .cse0 .cse1)) (< 2147483647 .cse1) (not (= (mod (select .cse2 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) (+ |c_#pthreadsForks| 1))))))) (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse6 (mod (select .cse5 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (not (= (+ |c_#pthreadsForks| 4294967298) (mod (select .cse5 .cse3) 4294967296))) (<= .cse6 2147483647) (not (= .cse6 .cse7)))))) (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse8 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= .cse0 (mod (select .cse8 .cse3) 4294967296))) (not (= (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296) .cse7))))))) is different from false [2023-08-03 19:58:06,898 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ 2 |c_#pthreadsForks|)) (.cse2 (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| 4)) (.cse3 (+ 4294967297 |c_#pthreadsForks|)) (.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base|) (+ |c_ULTIMATE.start_main_~#t1~0#1.offset| (* |c_ULTIMATE.start_main_~asdf~0#1| 4) 4) |c_#pthreadsForks|)))) (and (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse1 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (or (not (= .cse0 (mod (select .cse1 .cse2) 4294967296))) (not (= .cse3 (mod (select .cse1 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296)))))) (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse5 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse6 (mod (select .cse5 .cse2) 4294967296))) (or (not (= (+ |c_#pthreadsForks| 1) (mod (select .cse5 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (not (= .cse0 .cse6)) (< 2147483647 .cse6))))) (forall ((v_ArrVal_652 (Array Int Int))) (let ((.cse8 (select (store .cse4 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_652) |c_ULTIMATE.start_main_~#t1~0#1.base|))) (let ((.cse7 (mod (select .cse8 |c_ULTIMATE.start_main_~#t1~0#1.offset|) 4294967296))) (or (<= .cse7 2147483647) (not (= (+ |c_#pthreadsForks| 4294967298) (mod (select .cse8 .cse2) 4294967296))) (not (= .cse3 .cse7)))))))) is different from false [2023-08-03 19:58:06,974 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 19:58:06,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 72 [2023-08-03 19:58:07,010 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 19:58:07,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 120 [2023-08-03 19:58:07,026 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-03 19:58:07,026 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2023-08-03 19:58:07,182 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-03 19:58:07,182 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 113 treesize of output 1 [2023-08-03 19:58:07,188 INFO L322 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2023-08-03 19:58:07,188 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 1 [2023-08-03 19:58:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 8 not checked. [2023-08-03 19:58:07,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851335095] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-03 19:58:07,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-03 19:58:07,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 14] total 33 [2023-08-03 19:58:07,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626697755] [2023-08-03 19:58:07,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-03 19:58:07,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-03 19:58:07,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-03 19:58:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-03 19:58:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=802, Unknown=5, NotChecked=180, Total=1122 [2023-08-03 19:58:07,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 234 [2023-08-03 19:58:07,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 352 transitions, 5175 flow. Second operand has 34 states, 34 states have (on average 79.29411764705883) internal successors, (2696), 34 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-03 19:58:07,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-03 19:58:07,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 234 [2023-08-03 19:58:07,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand