/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 PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:19:22,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:19:22,452 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:19:22,457 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:19:22,457 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:19:22,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:19:22,458 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:19:22,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:19:22,486 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:19:22,486 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:19:22,487 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:19:22,487 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:19:22,488 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:19:22,488 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:19:22,488 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:19:22,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:19:22,489 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:19:22,489 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:19:22,490 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:19:22,490 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:19:22,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:19:22,494 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:19:22,495 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:19:22,495 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:19:22,495 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:19:22,495 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:19:22,496 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:19:22,496 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:19:22,496 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:19:22,497 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:19:22,497 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:22,497 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:19:22,498 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:19:22,498 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:19:22,498 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:19:22,498 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:19:22,499 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:19:22,499 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:19:22,499 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:19:22,499 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:19:22,500 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:19:22,508 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:19:22,758 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:19:22,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:19:22,781 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:19:22,782 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:19:22,782 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:19:22,783 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-04 08:19:23,934 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:19:24,132 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:19:24,132 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-04 08:19:24,141 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a478632/26ccce56f8ef4cbaa16946638cff067d/FLAG92720866c [2023-08-04 08:19:24,162 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a478632/26ccce56f8ef4cbaa16946638cff067d [2023-08-04 08:19:24,166 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:19:24,168 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:19:24,171 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:24,171 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:19:24,174 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:19:24,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,175 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@215852fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24, skipping insertion in model container [2023-08-04 08:19:24,175 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,204 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:19:24,380 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_chl-chromosome-symm.wvr_bound2.c[2857,2870] [2023-08-04 08:19:24,390 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:24,398 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:19:24,418 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_chl-chromosome-symm.wvr_bound2.c[2857,2870] [2023-08-04 08:19:24,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:19:24,433 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:19:24,433 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24 WrapperNode [2023-08-04 08:19:24,433 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:19:24,434 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:24,435 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:19:24,435 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:19:24,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,448 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,480 INFO L138 Inliner]: procedures = 25, calls = 37, calls flagged for inlining = 15, calls inlined = 19, statements flattened = 230 [2023-08-04 08:19:24,481 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:19:24,481 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:19:24,482 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:19:24,482 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:19:24,491 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,491 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,494 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,494 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,505 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,506 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,507 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,510 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:19:24,511 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:19:24,511 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:19:24,511 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:19:24,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (1/1) ... [2023-08-04 08:19:24,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:19:24,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:24,556 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) [2023-08-04 08:19:24,561 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 [2023-08-04 08:19:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:19:24,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:19:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:19:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:19:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:19:24,585 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:19:24,585 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:19:24,586 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:19:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:19:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 08:19:24,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:19:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:19:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:19:24,590 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 08:19:24,683 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:19:24,684 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:19:24,969 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:19:24,978 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:19:24,978 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:19:24,980 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:24 BoogieIcfgContainer [2023-08-04 08:19:24,980 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:19:24,982 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:19:24,982 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:19:24,985 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:19:24,985 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:19:24" (1/3) ... [2023-08-04 08:19:24,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52419345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:24, skipping insertion in model container [2023-08-04 08:19:24,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:19:24" (2/3) ... [2023-08-04 08:19:24,986 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52419345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:19:24, skipping insertion in model container [2023-08-04 08:19:24,986 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:19:24" (3/3) ... [2023-08-04 08:19:24,987 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_chl-chromosome-symm.wvr_bound2.c [2023-08-04 08:19:24,998 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:19:25,007 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:19:25,008 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:19:25,009 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:19:25,109 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-04 08:19:25,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:25,298 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-04 08:19:25,298 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-04 08:19:25,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-04 08:19:25,311 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:25,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:25,325 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:25,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:25,344 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:25,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:25,430 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-04 08:19:25,430 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-04 08:19:25,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-04 08:19:25,445 INFO L119 LiptonReduction]: Number of co-enabled transitions 16110 [2023-08-04 08:19:31,097 INFO L134 LiptonReduction]: Checked pairs total: 18874 [2023-08-04 08:19:31,098 INFO L136 LiptonReduction]: Total number of compositions: 282 [2023-08-04 08:19:31,109 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:19:31,114 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;@917e902, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:31,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:19:31,120 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:31,120 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 08:19:31,120 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:31,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:31,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:31,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:31,125 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:31,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1634305964, now seen corresponding path program 1 times [2023-08-04 08:19:31,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:31,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566595640] [2023-08-04 08:19:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:31,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:19:31,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:31,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566595640] [2023-08-04 08:19:31,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566595640] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:31,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:31,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:19:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458463281] [2023-08-04 08:19:31,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:31,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:31,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:31,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 543 [2023-08-04 08:19:31,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:31,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:31,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 543 [2023-08-04 08:19:31,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:31,681 INFO L124 PetriNetUnfolderBase]: 628/1059 cut-off events. [2023-08-04 08:19:31,682 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-08-04 08:19:31,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2138 conditions, 1059 events. 628/1059 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4628 event pairs, 476 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 1796. Up to 1024 conditions per place. [2023-08-04 08:19:31,687 INFO L140 encePairwiseOnDemand]: 536/543 looper letters, 33 selfloop transitions, 4 changer transitions 2/41 dead transitions. [2023-08-04 08:19:31,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 178 flow [2023-08-04 08:19:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:31,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-04 08:19:31,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953345610804173 [2023-08-04 08:19:31,705 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-04 08:19:31,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-04 08:19:31,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:31,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-04 08:19:31,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:31,720 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:31,721 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:31,723 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 104 flow. Second operand 3 states and 716 transitions. [2023-08-04 08:19:31,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 178 flow [2023-08-04 08:19:31,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 41 transitions, 178 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:31,727 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 114 flow [2023-08-04 08:19:31,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-04 08:19:31,731 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-04 08:19:31,731 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 114 flow [2023-08-04 08:19:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:31,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:31,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:31,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:19:31,733 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:31,733 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:31,733 INFO L85 PathProgramCache]: Analyzing trace with hash 1658030131, now seen corresponding path program 1 times [2023-08-04 08:19:31,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:31,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27130512] [2023-08-04 08:19:31,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:31,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:31,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:19:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27130512] [2023-08-04 08:19:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27130512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:31,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:31,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:19:31,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413604883] [2023-08-04 08:19:31,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:31,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:31,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:31,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 543 [2023-08-04 08:19:31,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:31,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:31,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 543 [2023-08-04 08:19:31,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:31,985 INFO L124 PetriNetUnfolderBase]: 611/1012 cut-off events. [2023-08-04 08:19:31,985 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-04 08:19:31,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 1012 events. 611/1012 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4226 event pairs, 216 based on Foata normal form. 0/780 useless extension candidates. Maximal degree in co-relation 2031. Up to 984 conditions per place. [2023-08-04 08:19:31,990 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 40 selfloop transitions, 2 changer transitions 1/45 dead transitions. [2023-08-04 08:19:31,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 212 flow [2023-08-04 08:19:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:31,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:31,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-08-04 08:19:31,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44751381215469616 [2023-08-04 08:19:31,993 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-08-04 08:19:31,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-08-04 08:19:31,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:31,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-08-04 08:19:31,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,001 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,002 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 114 flow. Second operand 3 states and 729 transitions. [2023-08-04 08:19:32,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 212 flow [2023-08-04 08:19:32,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 202 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:19:32,006 INFO L231 Difference]: Finished difference. Result has 37 places, 39 transitions, 112 flow [2023-08-04 08:19:32,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=37, PETRI_TRANSITIONS=39} [2023-08-04 08:19:32,008 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2023-08-04 08:19:32,010 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 39 transitions, 112 flow [2023-08-04 08:19:32,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.66666666666666) internal successors, (698), 3 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:32,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:32,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 08:19:32,016 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:32,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1179019430, now seen corresponding path program 1 times [2023-08-04 08:19:32,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:32,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993938317] [2023-08-04 08:19:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:32,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:19:32,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:32,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993938317] [2023-08-04 08:19:32,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993938317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:32,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816511155] [2023-08-04 08:19:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:32,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:32,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:32,137 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) [2023-08-04 08:19:32,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 08:19:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:32,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:32,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:32,247 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:32,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816511155] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:32,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:32,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:32,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375046530] [2023-08-04 08:19:32,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:32,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:32,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:32,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:32,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:32,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 543 [2023-08-04 08:19:32,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:32,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 543 [2023-08-04 08:19:32,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:32,404 INFO L124 PetriNetUnfolderBase]: 606/1008 cut-off events. [2023-08-04 08:19:32,405 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-04 08:19:32,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2054 conditions, 1008 events. 606/1008 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4107 event pairs, 225 based on Foata normal form. 0/787 useless extension candidates. Maximal degree in co-relation 2025. Up to 912 conditions per place. [2023-08-04 08:19:32,409 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 45 selfloop transitions, 2 changer transitions 1/50 dead transitions. [2023-08-04 08:19:32,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 230 flow [2023-08-04 08:19:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-08-04 08:19:32,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058317986494784 [2023-08-04 08:19:32,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-08-04 08:19:32,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-08-04 08:19:32,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:32,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-08-04 08:19:32,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,418 INFO L175 Difference]: Start difference. First operand has 37 places, 39 transitions, 112 flow. Second operand 3 states and 734 transitions. [2023-08-04 08:19:32,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 230 flow [2023-08-04 08:19:32,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:32,419 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 116 flow [2023-08-04 08:19:32,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=116, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2023-08-04 08:19:32,420 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 1 predicate places. [2023-08-04 08:19:32,420 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 116 flow [2023-08-04 08:19:32,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:32,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:32,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:32,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:32,636 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:32,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:32,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1484865101, now seen corresponding path program 1 times [2023-08-04 08:19:32,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:32,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450389563] [2023-08-04 08:19:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:32,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:32,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:32,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450389563] [2023-08-04 08:19:32,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450389563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:32,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115528069] [2023-08-04 08:19:32,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:32,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:32,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:32,703 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) [2023-08-04 08:19:32,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 08:19:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:32,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:32,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:32,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:32,794 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:32,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115528069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:32,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:32,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:32,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618512955] [2023-08-04 08:19:32,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:32,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:32,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:32,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:32,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:32,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 543 [2023-08-04 08:19:32,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:32,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 543 [2023-08-04 08:19:32,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:32,914 INFO L124 PetriNetUnfolderBase]: 336/593 cut-off events. [2023-08-04 08:19:32,914 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2023-08-04 08:19:32,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1299 conditions, 593 events. 336/593 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 2095 event pairs, 172 based on Foata normal form. 0/499 useless extension candidates. Maximal degree in co-relation 1270. Up to 412 conditions per place. [2023-08-04 08:19:32,917 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 49 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2023-08-04 08:19:32,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 53 transitions, 250 flow [2023-08-04 08:19:32,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:32,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 737 transitions. [2023-08-04 08:19:32,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45242480049109884 [2023-08-04 08:19:32,919 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 737 transitions. [2023-08-04 08:19:32,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 737 transitions. [2023-08-04 08:19:32,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:32,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 737 transitions. [2023-08-04 08:19:32,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,925 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 116 flow. Second operand 3 states and 737 transitions. [2023-08-04 08:19:32,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 53 transitions, 250 flow [2023-08-04 08:19:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:19:32,927 INFO L231 Difference]: Finished difference. Result has 39 places, 40 transitions, 124 flow [2023-08-04 08:19:32,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=39, PETRI_TRANSITIONS=40} [2023-08-04 08:19:32,928 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 2 predicate places. [2023-08-04 08:19:32,928 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 40 transitions, 124 flow [2023-08-04 08:19:32,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.66666666666666) internal successors, (704), 3 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:32,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:32,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:32,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:33,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 08:19:33,135 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:33,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:33,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1752130006, now seen corresponding path program 1 times [2023-08-04 08:19:33,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:33,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173032216] [2023-08-04 08:19:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:33,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:33,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:19:33,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:33,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173032216] [2023-08-04 08:19:33,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173032216] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:33,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631401927] [2023-08-04 08:19:33,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:33,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:33,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:33,221 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) [2023-08-04 08:19:33,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 08:19:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:33,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:33,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:33,325 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:33,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631401927] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:33,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:33,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:33,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780145067] [2023-08-04 08:19:33,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:33,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:33,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:33,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:33,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:33,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 543 [2023-08-04 08:19:33,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 40 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:33,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:33,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 543 [2023-08-04 08:19:33,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:33,440 INFO L124 PetriNetUnfolderBase]: 305/534 cut-off events. [2023-08-04 08:19:33,441 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2023-08-04 08:19:33,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1209 conditions, 534 events. 305/534 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1814 event pairs, 221 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 1179. Up to 479 conditions per place. [2023-08-04 08:19:33,443 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 45 selfloop transitions, 2 changer transitions 2/51 dead transitions. [2023-08-04 08:19:33,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 51 transitions, 244 flow [2023-08-04 08:19:33,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:33,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:33,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-08-04 08:19:33,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058317986494784 [2023-08-04 08:19:33,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-08-04 08:19:33,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-08-04 08:19:33,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:33,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-08-04 08:19:33,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:33,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:33,452 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:33,452 INFO L175 Difference]: Start difference. First operand has 39 places, 40 transitions, 124 flow. Second operand 3 states and 734 transitions. [2023-08-04 08:19:33,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 51 transitions, 244 flow [2023-08-04 08:19:33,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 51 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:33,456 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 126 flow [2023-08-04 08:19:33,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-04 08:19:33,458 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 4 predicate places. [2023-08-04 08:19:33,458 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 126 flow [2023-08-04 08:19:33,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 236.33333333333334) internal successors, (709), 3 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:33,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:33,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:33,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:33,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:33,667 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:33,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:33,667 INFO L85 PathProgramCache]: Analyzing trace with hash 753786708, now seen corresponding path program 1 times [2023-08-04 08:19:33,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:33,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142123458] [2023-08-04 08:19:33,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:33,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:33,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:33,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142123458] [2023-08-04 08:19:33,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142123458] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:33,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515852270] [2023-08-04 08:19:33,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:33,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:33,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:33,729 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) [2023-08-04 08:19:33,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 08:19:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:33,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:19:33,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:33,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:33,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:19:33,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515852270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:33,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:33,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:19:33,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390541726] [2023-08-04 08:19:33,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:33,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:19:33,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:33,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:19:33,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:19:34,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 543 [2023-08-04 08:19:34,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 126 flow. Second operand has 8 states, 8 states have (on average 221.125) internal successors, (1769), 8 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:34,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:34,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 543 [2023-08-04 08:19:34,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:34,067 INFO L124 PetriNetUnfolderBase]: 13/40 cut-off events. [2023-08-04 08:19:34,067 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 40 events. 13/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 54 event pairs, 0 based on Foata normal form. 8/44 useless extension candidates. Maximal degree in co-relation 99. Up to 20 conditions per place. [2023-08-04 08:19:34,067 INFO L140 encePairwiseOnDemand]: 536/543 looper letters, 0 selfloop transitions, 0 changer transitions 27/27 dead transitions. [2023-08-04 08:19:34,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 138 flow [2023-08-04 08:19:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:19:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:19:34,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1762 transitions. [2023-08-04 08:19:34,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4056169429097606 [2023-08-04 08:19:34,073 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1762 transitions. [2023-08-04 08:19:34,073 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1762 transitions. [2023-08-04 08:19:34,073 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:34,073 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1762 transitions. [2023-08-04 08:19:34,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 220.25) internal successors, (1762), 8 states have internal predecessors, (1762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:34,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 543.0) internal successors, (4887), 9 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:34,083 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 543.0) internal successors, (4887), 9 states have internal predecessors, (4887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:34,083 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 126 flow. Second operand 8 states and 1762 transitions. [2023-08-04 08:19:34,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 138 flow [2023-08-04 08:19:34,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 27 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:34,084 INFO L231 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2023-08-04 08:19:34,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2023-08-04 08:19:34,084 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -11 predicate places. [2023-08-04 08:19:34,085 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2023-08-04 08:19:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 221.125) internal successors, (1769), 8 states have internal predecessors, (1769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:34,087 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:19:34,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:34,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:34,294 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-08-04 08:19:34,295 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:19:34,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:34,336 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-04 08:19:34,337 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-04 08:19:34,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-04 08:19:34,338 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:34,341 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:34,341 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:34,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:34,341 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:34,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 261 transitions, 544 flow [2023-08-04 08:19:34,378 INFO L124 PetriNetUnfolderBase]: 57/472 cut-off events. [2023-08-04 08:19:34,378 INFO L125 PetriNetUnfolderBase]: For 8/13 co-relation queries the response was YES. [2023-08-04 08:19:34,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 492 conditions, 472 events. 57/472 cut-off events. For 8/13 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1843 event pairs, 0 based on Foata normal form. 0/405 useless extension candidates. Maximal degree in co-relation 263. Up to 8 conditions per place. [2023-08-04 08:19:34,389 INFO L119 LiptonReduction]: Number of co-enabled transitions 16110 [2023-08-04 08:19:39,558 INFO L134 LiptonReduction]: Checked pairs total: 18301 [2023-08-04 08:19:39,558 INFO L136 LiptonReduction]: Total number of compositions: 276 [2023-08-04 08:19:39,559 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:19:39,560 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;@917e902, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:39,560 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-08-04 08:19:39,563 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:39,563 INFO L124 PetriNetUnfolderBase]: 3/34 cut-off events. [2023-08-04 08:19:39,563 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:19:39,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:39,563 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:39,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:19:39,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1073158898, now seen corresponding path program 1 times [2023-08-04 08:19:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377993060] [2023-08-04 08:19:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:19:39,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:39,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377993060] [2023-08-04 08:19:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377993060] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:39,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:19:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102026881] [2023-08-04 08:19:39,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:39,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:39,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 537 [2023-08-04 08:19:39,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 42 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:39,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:39,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 537 [2023-08-04 08:19:39,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:39,746 INFO L124 PetriNetUnfolderBase]: 628/1091 cut-off events. [2023-08-04 08:19:39,746 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-04 08:19:39,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2166 conditions, 1091 events. 628/1091 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4964 event pairs, 476 based on Foata normal form. 36/885 useless extension candidates. Maximal degree in co-relation 1818. Up to 1024 conditions per place. [2023-08-04 08:19:39,749 INFO L140 encePairwiseOnDemand]: 530/537 looper letters, 20 selfloop transitions, 4 changer transitions 16/42 dead transitions. [2023-08-04 08:19:39,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 42 transitions, 180 flow [2023-08-04 08:19:39,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-04 08:19:39,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-04 08:19:39,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-04 08:19:39,751 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-04 08:19:39,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:39,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-04 08:19:39,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:39,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:39,757 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 537.0) internal successors, (2148), 4 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:39,757 INFO L175 Difference]: Start difference. First operand has 38 places, 42 transitions, 106 flow. Second operand 3 states and 716 transitions. [2023-08-04 08:19:39,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 42 transitions, 180 flow [2023-08-04 08:19:39,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 180 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:39,758 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 80 flow [2023-08-04 08:19:39,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2023-08-04 08:19:39,759 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 2 predicate places. [2023-08-04 08:19:39,759 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 80 flow [2023-08-04 08:19:39,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:39,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:39,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:39,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 08:19:39,760 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:19:39,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:39,760 INFO L85 PathProgramCache]: Analyzing trace with hash -188013227, now seen corresponding path program 1 times [2023-08-04 08:19:39,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:39,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174961496] [2023-08-04 08:19:39,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:39,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:39,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174961496] [2023-08-04 08:19:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174961496] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913211845] [2023-08-04 08:19:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:39,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:39,841 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) [2023-08-04 08:19:39,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 08:19:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:39,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:19:39,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:39,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:19:39,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913211845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:39,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:39,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-04 08:19:39,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820772031] [2023-08-04 08:19:39,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:39,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:19:39,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:39,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:19:39,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:19:40,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-04 08:19:40,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 80 flow. Second operand has 8 states, 8 states have (on average 222.75) internal successors, (1782), 8 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:40,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-04 08:19:40,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:40,093 INFO L124 PetriNetUnfolderBase]: 164/301 cut-off events. [2023-08-04 08:19:40,093 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:19:40,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 301 events. 164/301 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 982 event pairs, 124 based on Foata normal form. 3/259 useless extension candidates. Maximal degree in co-relation 605. Up to 286 conditions per place. [2023-08-04 08:19:40,095 INFO L140 encePairwiseOnDemand]: 532/537 looper letters, 20 selfloop transitions, 10 changer transitions 0/32 dead transitions. [2023-08-04 08:19:40,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 32 transitions, 164 flow [2023-08-04 08:19:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 08:19:40,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 08:19:40,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1362 transitions. [2023-08-04 08:19:40,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4227188081936685 [2023-08-04 08:19:40,099 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1362 transitions. [2023-08-04 08:19:40,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1362 transitions. [2023-08-04 08:19:40,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:40,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1362 transitions. [2023-08-04 08:19:40,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 227.0) internal successors, (1362), 6 states have internal predecessors, (1362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,107 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 537.0) internal successors, (3759), 7 states have internal predecessors, (3759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,107 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 80 flow. Second operand 6 states and 1362 transitions. [2023-08-04 08:19:40,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 32 transitions, 164 flow [2023-08-04 08:19:40,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:40,109 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 142 flow [2023-08-04 08:19:40,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-04 08:19:40,110 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-04 08:19:40,110 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 142 flow [2023-08-04 08:19:40,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 222.75) internal successors, (1782), 8 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:40,111 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:40,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:40,318 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 [2023-08-04 08:19:40,319 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:19:40,319 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash -973046450, now seen corresponding path program 2 times [2023-08-04 08:19:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:40,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784296081] [2023-08-04 08:19:40,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:19:40,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784296081] [2023-08-04 08:19:40,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784296081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:40,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239510300] [2023-08-04 08:19:40,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 08:19:40,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:40,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:40,435 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) [2023-08-04 08:19:40,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 08:19:40,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 08:19:40,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 08:19:40,533 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:19:40,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:19:40,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:19:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 08:19:40,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239510300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:19:40,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:19:40,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-04 08:19:40,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840228192] [2023-08-04 08:19:40,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:19:40,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 08:19:40,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:40,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 08:19:40,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2023-08-04 08:19:40,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 537 [2023-08-04 08:19:40,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 142 flow. Second operand has 17 states, 17 states have (on average 222.35294117647058) internal successors, (3780), 17 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:40,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 537 [2023-08-04 08:19:40,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:40,959 INFO L124 PetriNetUnfolderBase]: 164/303 cut-off events. [2023-08-04 08:19:40,960 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 08:19:40,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 667 conditions, 303 events. 164/303 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 982 event pairs, 124 based on Foata normal form. 1/259 useless extension candidates. Maximal degree in co-relation 596. Up to 286 conditions per place. [2023-08-04 08:19:40,961 INFO L140 encePairwiseOnDemand]: 532/537 looper letters, 20 selfloop transitions, 12 changer transitions 0/34 dead transitions. [2023-08-04 08:19:40,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 218 flow [2023-08-04 08:19:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-04 08:19:40,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-04 08:19:40,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1581 transitions. [2023-08-04 08:19:40,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205905826017558 [2023-08-04 08:19:40,966 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1581 transitions. [2023-08-04 08:19:40,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1581 transitions. [2023-08-04 08:19:40,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:40,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1581 transitions. [2023-08-04 08:19:40,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 225.85714285714286) internal successors, (1581), 7 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,974 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 537.0) internal successors, (4296), 8 states have internal predecessors, (4296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,975 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 142 flow. Second operand 7 states and 1581 transitions. [2023-08-04 08:19:40,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 218 flow [2023-08-04 08:19:40,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 34 transitions, 202 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-04 08:19:40,976 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 172 flow [2023-08-04 08:19:40,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=537, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=172, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2023-08-04 08:19:40,977 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-04 08:19:40,977 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 172 flow [2023-08-04 08:19:40,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 222.35294117647058) internal successors, (3780), 17 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:40,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:40,979 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:40,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:19:41,185 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 [2023-08-04 08:19:41,186 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-04 08:19:41,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:41,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1263046123, now seen corresponding path program 3 times [2023-08-04 08:19:41,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:41,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508106610] [2023-08-04 08:19:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:41,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:19:41,233 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:19:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:19:41,280 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:19:41,282 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:19:41,283 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-08-04 08:19:41,283 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 2 remaining) [2023-08-04 08:19:41,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:19:41,283 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-04 08:19:41,283 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN (2/2) [2023-08-04 08:19:41,284 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:19:41,284 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:19:41,332 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-04 08:19:41,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 08:19:41,535 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-04 08:19:41,535 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-04 08:19:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-04 08:19:41,545 INFO L82 GeneralOperation]: Start removeDead. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 08:19:41,553 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 357 transitions, 762 flow [2023-08-04 08:19:41,553 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:19:41,553 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-04 08:19:41,554 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 357 transitions, 762 flow [2023-08-04 08:19:41,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 357 transitions, 762 flow [2023-08-04 08:19:41,726 INFO L124 PetriNetUnfolderBase]: 197/1366 cut-off events. [2023-08-04 08:19:41,726 INFO L125 PetriNetUnfolderBase]: For 72/86 co-relation queries the response was YES. [2023-08-04 08:19:41,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1463 conditions, 1366 events. 197/1366 cut-off events. For 72/86 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 8191 event pairs, 1 based on Foata normal form. 0/1166 useless extension candidates. Maximal degree in co-relation 826. Up to 32 conditions per place. [2023-08-04 08:19:41,796 INFO L119 LiptonReduction]: Number of co-enabled transitions 50220 [2023-08-04 08:19:48,146 INFO L134 LiptonReduction]: Checked pairs total: 65456 [2023-08-04 08:19:48,146 INFO L136 LiptonReduction]: Total number of compositions: 378 [2023-08-04 08:19:48,148 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:19:48,148 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;@917e902, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:19:48,148 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:19:48,151 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:19:48,151 INFO L124 PetriNetUnfolderBase]: 2/30 cut-off events. [2023-08-04 08:19:48,151 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 08:19:48,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:48,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:48,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:48,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:48,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1307772179, now seen corresponding path program 1 times [2023-08-04 08:19:48,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:48,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198372559] [2023-08-04 08:19:48,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:48,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:19:48,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:48,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198372559] [2023-08-04 08:19:48,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198372559] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:48,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:19:48,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 08:19:48,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635707682] [2023-08-04 08:19:48,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:48,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:48,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:48,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:48,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:19:48,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-04 08:19:48,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 62 transitions, 172 flow. Second operand has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:48,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:48,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-04 08:19:48,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:19:55,115 INFO L124 PetriNetUnfolderBase]: 84412/110979 cut-off events. [2023-08-04 08:19:55,115 INFO L125 PetriNetUnfolderBase]: For 6786/6786 co-relation queries the response was YES. [2023-08-04 08:19:55,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223956 conditions, 110979 events. 84412/110979 cut-off events. For 6786/6786 co-relation queries the response was YES. Maximal size of possible extension queue 2578. Compared 627967 event pairs, 50487 based on Foata normal form. 0/90311 useless extension candidates. Maximal degree in co-relation 44068. Up to 108927 conditions per place. [2023-08-04 08:19:55,665 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 61 selfloop transitions, 2 changer transitions 2/69 dead transitions. [2023-08-04 08:19:55,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 312 flow [2023-08-04 08:19:55,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:19:55,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:19:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 998 transitions. [2023-08-04 08:19:55,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4526077097505669 [2023-08-04 08:19:55,669 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 998 transitions. [2023-08-04 08:19:55,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 998 transitions. [2023-08-04 08:19:55,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:19:55,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 998 transitions. [2023-08-04 08:19:55,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 332.6666666666667) internal successors, (998), 3 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:55,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:55,686 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:55,686 INFO L175 Difference]: Start difference. First operand has 57 places, 62 transitions, 172 flow. Second operand 3 states and 998 transitions. [2023-08-04 08:19:55,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 312 flow [2023-08-04 08:19:55,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:19:55,691 INFO L231 Difference]: Finished difference. Result has 59 places, 60 transitions, 170 flow [2023-08-04 08:19:55,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=59, PETRI_TRANSITIONS=60} [2023-08-04 08:19:55,692 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 08:19:55,692 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 60 transitions, 170 flow [2023-08-04 08:19:55,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 314.0) internal successors, (942), 3 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:55,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:19:55,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:19:55,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 08:19:55,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:19:55,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:19:55,693 INFO L85 PathProgramCache]: Analyzing trace with hash -943166328, now seen corresponding path program 1 times [2023-08-04 08:19:55,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:19:55,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512561509] [2023-08-04 08:19:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:55,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:19:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 08:19:55,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:19:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512561509] [2023-08-04 08:19:55,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512561509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:19:55,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944685679] [2023-08-04 08:19:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:19:55,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:19:55,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:19:55,741 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) [2023-08-04 08:19:55,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 08:19:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:19:55,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:19:55,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:19:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:19:55,843 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:19:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944685679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:19:55,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:19:55,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:19:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889462111] [2023-08-04 08:19:55,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:19:55,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:19:55,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:19:55,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:19:55,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:19:55,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-04 08:19:55,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 60 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:19:55,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:19:55,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-04 08:19:55,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:02,920 INFO L124 PetriNetUnfolderBase]: 84370/111130 cut-off events. [2023-08-04 08:20:02,922 INFO L125 PetriNetUnfolderBase]: For 5467/5467 co-relation queries the response was YES. [2023-08-04 08:20:03,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223726 conditions, 111130 events. 84370/111130 cut-off events. For 5467/5467 co-relation queries the response was YES. Maximal size of possible extension queue 2583. Compared 628552 event pairs, 50354 based on Foata normal form. 0/90378 useless extension candidates. Maximal degree in co-relation 223664. Up to 107892 conditions per place. [2023-08-04 08:20:03,396 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 74 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2023-08-04 08:20:03,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 80 transitions, 362 flow [2023-08-04 08:20:03,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:03,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1009 transitions. [2023-08-04 08:20:03,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4575963718820862 [2023-08-04 08:20:03,399 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1009 transitions. [2023-08-04 08:20:03,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1009 transitions. [2023-08-04 08:20:03,400 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:03,400 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1009 transitions. [2023-08-04 08:20:03,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 336.3333333333333) internal successors, (1009), 3 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:03,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:03,405 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:03,405 INFO L175 Difference]: Start difference. First operand has 59 places, 60 transitions, 170 flow. Second operand 3 states and 1009 transitions. [2023-08-04 08:20:03,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 80 transitions, 362 flow [2023-08-04 08:20:03,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 80 transitions, 354 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-04 08:20:03,420 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 174 flow [2023-08-04 08:20:03,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2023-08-04 08:20:03,421 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 0 predicate places. [2023-08-04 08:20:03,421 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 174 flow [2023-08-04 08:20:03,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:03,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:03,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:03,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:03,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:03,627 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:03,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:03,627 INFO L85 PathProgramCache]: Analyzing trace with hash 562660800, now seen corresponding path program 1 times [2023-08-04 08:20:03,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:03,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717491013] [2023-08-04 08:20:03,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:03,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:03,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 08:20:03,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:03,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717491013] [2023-08-04 08:20:03,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717491013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:03,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962330892] [2023-08-04 08:20:03,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:03,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:03,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:03,672 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) [2023-08-04 08:20:03,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 08:20:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:03,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:03,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:03,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:20:03,772 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:03,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962330892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:03,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:03,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:20:03,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182505281] [2023-08-04 08:20:03,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:03,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:03,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:03,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:03,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:03,781 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-04 08:20:03,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:03,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:03,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-04 08:20:03,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:08,575 INFO L124 PetriNetUnfolderBase]: 57862/77941 cut-off events. [2023-08-04 08:20:08,575 INFO L125 PetriNetUnfolderBase]: For 5428/5428 co-relation queries the response was YES. [2023-08-04 08:20:08,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160736 conditions, 77941 events. 57862/77941 cut-off events. For 5428/5428 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 450145 event pairs, 33740 based on Foata normal form. 0/65973 useless extension candidates. Maximal degree in co-relation 41761. Up to 55482 conditions per place. [2023-08-04 08:20:08,935 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 85 selfloop transitions, 2 changer transitions 0/91 dead transitions. [2023-08-04 08:20:08,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 91 transitions, 418 flow [2023-08-04 08:20:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:08,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:08,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-04 08:20:08,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621315192743764 [2023-08-04 08:20:08,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-04 08:20:08,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-04 08:20:08,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:08,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-04 08:20:08,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,944 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,944 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 174 flow. Second operand 3 states and 1019 transitions. [2023-08-04 08:20:08,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 91 transitions, 418 flow [2023-08-04 08:20:08,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 91 transitions, 416 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:08,951 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 184 flow [2023-08-04 08:20:08,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2023-08-04 08:20:08,952 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2023-08-04 08:20:08,952 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 184 flow [2023-08-04 08:20:08,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 316.0) internal successors, (948), 3 states have internal predecessors, (948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:08,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:08,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:08,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:09,167 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,SelfDestructingSolverStorable12 [2023-08-04 08:20:09,168 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:09,168 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:09,168 INFO L85 PathProgramCache]: Analyzing trace with hash -935206727, now seen corresponding path program 1 times [2023-08-04 08:20:09,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:09,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069864152] [2023-08-04 08:20:09,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:09,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 08:20:09,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:09,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069864152] [2023-08-04 08:20:09,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069864152] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:09,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859298980] [2023-08-04 08:20:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:09,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:09,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:09,212 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) [2023-08-04 08:20:09,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 08:20:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:09,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:20:09,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:20:09,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:09,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859298980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:09,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:09,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 08:20:09,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466765894] [2023-08-04 08:20:09,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:09,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:09,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:09,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:09,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:09,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 735 [2023-08-04 08:20:09,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:09,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:09,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 735 [2023-08-04 08:20:09,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:13,413 INFO L124 PetriNetUnfolderBase]: 50857/68743 cut-off events. [2023-08-04 08:20:13,413 INFO L125 PetriNetUnfolderBase]: For 15771/15771 co-relation queries the response was YES. [2023-08-04 08:20:13,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147495 conditions, 68743 events. 50857/68743 cut-off events. For 15771/15771 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 388085 event pairs, 36211 based on Foata normal form. 0/59842 useless extension candidates. Maximal degree in co-relation 50825. Up to 57810 conditions per place. [2023-08-04 08:20:13,670 INFO L140 encePairwiseOnDemand]: 732/735 looper letters, 86 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2023-08-04 08:20:13,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 430 flow [2023-08-04 08:20:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:13,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1019 transitions. [2023-08-04 08:20:13,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621315192743764 [2023-08-04 08:20:13,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1019 transitions. [2023-08-04 08:20:13,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1019 transitions. [2023-08-04 08:20:13,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:13,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1019 transitions. [2023-08-04 08:20:13,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 339.6666666666667) internal successors, (1019), 3 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:13,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:13,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:13,678 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 184 flow. Second operand 3 states and 1019 transitions. [2023-08-04 08:20:13,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 430 flow [2023-08-04 08:20:13,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 92 transitions, 428 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:13,841 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 194 flow [2023-08-04 08:20:13,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=194, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2023-08-04 08:20:13,842 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2023-08-04 08:20:13,842 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 194 flow [2023-08-04 08:20:13,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 317.6666666666667) internal successors, (953), 3 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:13,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:13,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:13,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:14,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 08:20:14,043 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:14,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:14,044 INFO L85 PathProgramCache]: Analyzing trace with hash -893437398, now seen corresponding path program 1 times [2023-08-04 08:20:14,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:14,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784013454] [2023-08-04 08:20:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:14,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:14,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 08:20:14,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784013454] [2023-08-04 08:20:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784013454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753931274] [2023-08-04 08:20:14,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:14,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:14,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:14,089 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) [2023-08-04 08:20:14,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 08:20:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:14,197 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 08:20:14,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 08:20:14,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:20:14,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753931274] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:14,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:20:14,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 08:20:14,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601877766] [2023-08-04 08:20:14,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:14,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:20:14,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:14,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:20:14,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:14,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 735 [2023-08-04 08:20:14,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:14,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:14,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 735 [2023-08-04 08:20:14,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:18,317 INFO L124 PetriNetUnfolderBase]: 50857/68745 cut-off events. [2023-08-04 08:20:18,318 INFO L125 PetriNetUnfolderBase]: For 12838/12838 co-relation queries the response was YES. [2023-08-04 08:20:18,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148297 conditions, 68745 events. 50857/68745 cut-off events. For 12838/12838 co-relation queries the response was YES. Maximal size of possible extension queue 1476. Compared 388281 event pairs, 41696 based on Foata normal form. 1/60086 useless extension candidates. Maximal degree in co-relation 118718. Up to 67080 conditions per place. [2023-08-04 08:20:18,610 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 57 selfloop transitions, 4 changer transitions 0/65 dead transitions. [2023-08-04 08:20:18,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 320 flow [2023-08-04 08:20:18,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:20:18,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:20:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 980 transitions. [2023-08-04 08:20:18,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2023-08-04 08:20:18,612 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 980 transitions. [2023-08-04 08:20:18,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 980 transitions. [2023-08-04 08:20:18,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:18,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 980 transitions. [2023-08-04 08:20:18,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 326.6666666666667) internal successors, (980), 3 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:18,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:18,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 735.0) internal successors, (2940), 4 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:18,616 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 194 flow. Second operand 3 states and 980 transitions. [2023-08-04 08:20:18,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 320 flow [2023-08-04 08:20:19,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:19,457 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 214 flow [2023-08-04 08:20:19,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2023-08-04 08:20:19,457 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 6 predicate places. [2023-08-04 08:20:19,458 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 214 flow [2023-08-04 08:20:19,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.3333333333333) internal successors, (946), 3 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:19,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:19,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:20:19,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:19,659 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 [2023-08-04 08:20:19,660 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:19,660 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash 72366594, now seen corresponding path program 1 times [2023-08-04 08:20:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:19,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882817784] [2023-08-04 08:20:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:19,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:19,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882817784] [2023-08-04 08:20:19,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882817784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641880656] [2023-08-04 08:20:19,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:19,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:19,730 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) [2023-08-04 08:20:19,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 08:20:19,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:19,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-04 08:20:19,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:19,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:19,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:20:19,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 08:20:19,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641880656] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:20:19,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:20:19,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2023-08-04 08:20:19,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898560105] [2023-08-04 08:20:19,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:20:19,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 08:20:19,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:19,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 08:20:19,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 08:20:19,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 735 [2023-08-04 08:20:19,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 214 flow. Second operand has 8 states, 8 states have (on average 303.125) internal successors, (2425), 8 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:19,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:19,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 735 [2023-08-04 08:20:19,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:23,842 INFO L124 PetriNetUnfolderBase]: 47179/63550 cut-off events. [2023-08-04 08:20:23,843 INFO L125 PetriNetUnfolderBase]: For 10177/10177 co-relation queries the response was YES. [2023-08-04 08:20:23,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136793 conditions, 63550 events. 47179/63550 cut-off events. For 10177/10177 co-relation queries the response was YES. Maximal size of possible extension queue 1395. Compared 353079 event pairs, 18303 based on Foata normal form. 12/55489 useless extension candidates. Maximal degree in co-relation 136755. Up to 61827 conditions per place. [2023-08-04 08:20:24,108 INFO L140 encePairwiseOnDemand]: 727/735 looper letters, 73 selfloop transitions, 13 changer transitions 1/91 dead transitions. [2023-08-04 08:20:24,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 452 flow [2023-08-04 08:20:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 08:20:24,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 08:20:24,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2475 transitions. [2023-08-04 08:20:24,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42091836734693877 [2023-08-04 08:20:24,112 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2475 transitions. [2023-08-04 08:20:24,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2475 transitions. [2023-08-04 08:20:24,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:24,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2475 transitions. [2023-08-04 08:20:24,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 309.375) internal successors, (2475), 8 states have internal predecessors, (2475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:24,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 735.0) internal successors, (6615), 9 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:24,124 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 735.0) internal successors, (6615), 9 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:24,124 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 214 flow. Second operand 8 states and 2475 transitions. [2023-08-04 08:20:24,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 452 flow [2023-08-04 08:20:24,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 91 transitions, 448 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:24,428 INFO L231 Difference]: Finished difference. Result has 71 places, 71 transitions, 276 flow [2023-08-04 08:20:24,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=276, PETRI_PLACES=71, PETRI_TRANSITIONS=71} [2023-08-04 08:20:24,429 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 14 predicate places. [2023-08-04 08:20:24,429 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 71 transitions, 276 flow [2023-08-04 08:20:24,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 303.125) internal successors, (2425), 8 states have internal predecessors, (2425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:24,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:24,430 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 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, 1, 1, 1, 1] [2023-08-04 08:20:24,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-04 08:20:24,630 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 [2023-08-04 08:20:24,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:24,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:24,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1768410424, now seen corresponding path program 1 times [2023-08-04 08:20:24,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:24,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440558300] [2023-08-04 08:20:24,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:24,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:24,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-04 08:20:24,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440558300] [2023-08-04 08:20:24,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440558300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:24,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392321094] [2023-08-04 08:20:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:24,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:24,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:24,699 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) [2023-08-04 08:20:24,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 08:20:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:24,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-04 08:20:24,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:20:24,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:20:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-08-04 08:20:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392321094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:20:24,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:20:24,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 14 [2023-08-04 08:20:24,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832692882] [2023-08-04 08:20:24,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:20:24,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-04 08:20:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-04 08:20:24,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2023-08-04 08:20:25,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 298 out of 735 [2023-08-04 08:20:25,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 71 transitions, 276 flow. Second operand has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:25,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:25,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 298 of 735 [2023-08-04 08:20:25,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:29,154 INFO L124 PetriNetUnfolderBase]: 45487/61416 cut-off events. [2023-08-04 08:20:29,154 INFO L125 PetriNetUnfolderBase]: For 5832/5832 co-relation queries the response was YES. [2023-08-04 08:20:29,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131885 conditions, 61416 events. 45487/61416 cut-off events. For 5832/5832 co-relation queries the response was YES. Maximal size of possible extension queue 1304. Compared 339551 event pairs, 15452 based on Foata normal form. 217/53901 useless extension candidates. Maximal degree in co-relation 131808. Up to 45270 conditions per place. [2023-08-04 08:20:29,387 INFO L140 encePairwiseOnDemand]: 726/735 looper letters, 97 selfloop transitions, 15 changer transitions 1/117 dead transitions. [2023-08-04 08:20:29,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 602 flow [2023-08-04 08:20:29,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-04 08:20:29,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-04 08:20:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2795 transitions. [2023-08-04 08:20:29,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42252456538170824 [2023-08-04 08:20:29,391 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2795 transitions. [2023-08-04 08:20:29,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2795 transitions. [2023-08-04 08:20:29,393 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:29,393 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2795 transitions. [2023-08-04 08:20:29,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 310.55555555555554) internal successors, (2795), 9 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:29,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 735.0) internal successors, (7350), 10 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:29,404 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 735.0) internal successors, (7350), 10 states have internal predecessors, (7350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:29,404 INFO L175 Difference]: Start difference. First operand has 71 places, 71 transitions, 276 flow. Second operand 9 states and 2795 transitions. [2023-08-04 08:20:29,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 602 flow [2023-08-04 08:20:30,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 565 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-04 08:20:30,171 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 303 flow [2023-08-04 08:20:30,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=303, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2023-08-04 08:20:30,171 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 21 predicate places. [2023-08-04 08:20:30,172 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 303 flow [2023-08-04 08:20:30,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 301.92857142857144) internal successors, (4227), 14 states have internal predecessors, (4227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:30,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:30,173 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:20:30,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:30,378 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 [2023-08-04 08:20:30,378 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:30,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash 513903667, now seen corresponding path program 1 times [2023-08-04 08:20:30,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:30,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343099788] [2023-08-04 08:20:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:30,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 08:20:30,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343099788] [2023-08-04 08:20:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343099788] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127782593] [2023-08-04 08:20:30,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:30,498 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) [2023-08-04 08:20:30,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 08:20:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:30,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:20:30,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 08:20:30,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:20:30,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 08:20:30,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127782593] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:20:30,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:20:30,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:20:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347724503] [2023-08-04 08:20:30,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:20:30,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:20:30,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:30,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:20:30,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:30,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 08:20:30,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 303 flow. Second operand has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:30,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:30,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 08:20:30,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:33,393 INFO L124 PetriNetUnfolderBase]: 32215/43524 cut-off events. [2023-08-04 08:20:33,394 INFO L125 PetriNetUnfolderBase]: For 18970/18970 co-relation queries the response was YES. [2023-08-04 08:20:33,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97722 conditions, 43524 events. 32215/43524 cut-off events. For 18970/18970 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 232822 event pairs, 10507 based on Foata normal form. 864/38821 useless extension candidates. Maximal degree in co-relation 97641. Up to 17183 conditions per place. [2023-08-04 08:20:33,549 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 119 selfloop transitions, 4 changer transitions 0/127 dead transitions. [2023-08-04 08:20:33,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 666 flow [2023-08-04 08:20:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:20:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:20:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2023-08-04 08:20:33,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-08-04 08:20:33,552 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2023-08-04 08:20:33,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2023-08-04 08:20:33,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:33,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2023-08-04 08:20:33,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:33,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:33,557 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:33,557 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 303 flow. Second operand 4 states and 1351 transitions. [2023-08-04 08:20:33,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 666 flow [2023-08-04 08:20:33,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 127 transitions, 638 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-04 08:20:33,689 INFO L231 Difference]: Finished difference. Result has 77 places, 74 transitions, 296 flow [2023-08-04 08:20:33,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=296, PETRI_PLACES=77, PETRI_TRANSITIONS=74} [2023-08-04 08:20:33,690 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2023-08-04 08:20:33,690 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 74 transitions, 296 flow [2023-08-04 08:20:33,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 316.6) internal successors, (1583), 5 states have internal predecessors, (1583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:33,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:33,690 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:20:33,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 08:20:33,895 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 [2023-08-04 08:20:33,896 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:33,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash -236047948, now seen corresponding path program 1 times [2023-08-04 08:20:33,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:33,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619000722] [2023-08-04 08:20:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 08:20:33,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619000722] [2023-08-04 08:20:33,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619000722] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:20:33,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156399263] [2023-08-04 08:20:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:33,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:20:33,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:20:33,973 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) [2023-08-04 08:20:34,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 08:20:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:34,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:20:34,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:20:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 08:20:34,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:20:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2023-08-04 08:20:34,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156399263] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:20:34,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:20:34,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 08:20:34,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763655497] [2023-08-04 08:20:34,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:20:34,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:20:34,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:34,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:20:34,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:20:34,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 08:20:34,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 74 transitions, 296 flow. Second operand has 5 states, 5 states have (on average 317.2) internal successors, (1586), 5 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:34,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:34,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 08:20:34,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:37,353 INFO L124 PetriNetUnfolderBase]: 32143/43381 cut-off events. [2023-08-04 08:20:37,353 INFO L125 PetriNetUnfolderBase]: For 25072/25072 co-relation queries the response was YES. [2023-08-04 08:20:37,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102529 conditions, 43381 events. 32143/43381 cut-off events. For 25072/25072 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 230817 event pairs, 25747 based on Foata normal form. 25/37851 useless extension candidates. Maximal degree in co-relation 102457. Up to 40432 conditions per place. [2023-08-04 08:20:37,510 INFO L140 encePairwiseOnDemand]: 731/735 looper letters, 119 selfloop transitions, 3 changer transitions 2/128 dead transitions. [2023-08-04 08:20:37,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 128 transitions, 660 flow [2023-08-04 08:20:37,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:20:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:20:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1351 transitions. [2023-08-04 08:20:37,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2023-08-04 08:20:37,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1351 transitions. [2023-08-04 08:20:37,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1351 transitions. [2023-08-04 08:20:37,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:37,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1351 transitions. [2023-08-04 08:20:37,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 337.75) internal successors, (1351), 4 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:37,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:37,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:37,518 INFO L175 Difference]: Start difference. First operand has 77 places, 74 transitions, 296 flow. Second operand 4 states and 1351 transitions. [2023-08-04 08:20:37,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 128 transitions, 660 flow [2023-08-04 08:20:37,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 128 transitions, 656 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:37,871 INFO L231 Difference]: Finished difference. Result has 81 places, 73 transitions, 300 flow [2023-08-04 08:20:37,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=300, PETRI_PLACES=81, PETRI_TRANSITIONS=73} [2023-08-04 08:20:37,871 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 24 predicate places. [2023-08-04 08:20:37,871 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 73 transitions, 300 flow [2023-08-04 08:20:37,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 317.2) internal successors, (1586), 5 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:37,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:37,872 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:20:37,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 08:20:38,072 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 [2023-08-04 08:20:38,072 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:38,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:38,073 INFO L85 PathProgramCache]: Analyzing trace with hash -832130533, now seen corresponding path program 1 times [2023-08-04 08:20:38,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358309741] [2023-08-04 08:20:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-08-04 08:20:38,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:38,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358309741] [2023-08-04 08:20:38,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358309741] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:38,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:38,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:20:38,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116418745] [2023-08-04 08:20:38,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:38,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:20:38,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:38,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:20:38,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:20:38,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 08:20:38,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 73 transitions, 300 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:38,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:38,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 08:20:38,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:44,016 INFO L124 PetriNetUnfolderBase]: 57611/76949 cut-off events. [2023-08-04 08:20:44,016 INFO L125 PetriNetUnfolderBase]: For 45168/45168 co-relation queries the response was YES. [2023-08-04 08:20:44,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181184 conditions, 76949 events. 57611/76949 cut-off events. For 45168/45168 co-relation queries the response was YES. Maximal size of possible extension queue 1814. Compared 448693 event pairs, 26058 based on Foata normal form. 704/67355 useless extension candidates. Maximal degree in co-relation 181110. Up to 41078 conditions per place. [2023-08-04 08:20:44,415 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 148 selfloop transitions, 3 changer transitions 9/164 dead transitions. [2023-08-04 08:20:44,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 164 transitions, 980 flow [2023-08-04 08:20:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:20:44,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:20:44,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1381 transitions. [2023-08-04 08:20:44,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4697278911564626 [2023-08-04 08:20:44,418 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1381 transitions. [2023-08-04 08:20:44,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1381 transitions. [2023-08-04 08:20:44,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:44,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1381 transitions. [2023-08-04 08:20:44,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 345.25) internal successors, (1381), 4 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:44,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:44,423 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:44,423 INFO L175 Difference]: Start difference. First operand has 81 places, 73 transitions, 300 flow. Second operand 4 states and 1381 transitions. [2023-08-04 08:20:44,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 164 transitions, 980 flow [2023-08-04 08:20:45,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 164 transitions, 959 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 08:20:45,140 INFO L231 Difference]: Finished difference. Result has 83 places, 75 transitions, 314 flow [2023-08-04 08:20:45,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=314, PETRI_PLACES=83, PETRI_TRANSITIONS=75} [2023-08-04 08:20:45,140 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2023-08-04 08:20:45,140 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 75 transitions, 314 flow [2023-08-04 08:20:45,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:45,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:45,141 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:20:45,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 08:20:45,141 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:45,141 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:45,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1756867749, now seen corresponding path program 2 times [2023-08-04 08:20:45,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:45,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195536164] [2023-08-04 08:20:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:45,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:45,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:45,381 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-04 08:20:45,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:45,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195536164] [2023-08-04 08:20:45,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195536164] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:45,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:45,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:20:45,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617534564] [2023-08-04 08:20:45,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:45,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:20:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:20:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:20:45,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 08:20:45,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 75 transitions, 314 flow. Second operand has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:45,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:45,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 08:20:45,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:20:55,890 INFO L124 PetriNetUnfolderBase]: 105396/141185 cut-off events. [2023-08-04 08:20:55,891 INFO L125 PetriNetUnfolderBase]: For 95673/95673 co-relation queries the response was YES. [2023-08-04 08:20:56,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355958 conditions, 141185 events. 105396/141185 cut-off events. For 95673/95673 co-relation queries the response was YES. Maximal size of possible extension queue 3023. Compared 882534 event pairs, 48649 based on Foata normal form. 1108/128056 useless extension candidates. Maximal degree in co-relation 355883. Up to 75282 conditions per place. [2023-08-04 08:20:56,874 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 151 selfloop transitions, 3 changer transitions 6/164 dead transitions. [2023-08-04 08:20:56,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 164 transitions, 995 flow [2023-08-04 08:20:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:20:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:20:56,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1377 transitions. [2023-08-04 08:20:56,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4683673469387755 [2023-08-04 08:20:56,877 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1377 transitions. [2023-08-04 08:20:56,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1377 transitions. [2023-08-04 08:20:56,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:20:56,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1377 transitions. [2023-08-04 08:20:56,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.25) internal successors, (1377), 4 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:56,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:56,881 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:56,881 INFO L175 Difference]: Start difference. First operand has 83 places, 75 transitions, 314 flow. Second operand 4 states and 1377 transitions. [2023-08-04 08:20:56,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 164 transitions, 995 flow [2023-08-04 08:20:58,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 164 transitions, 989 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:20:58,466 INFO L231 Difference]: Finished difference. Result has 87 places, 77 transitions, 334 flow [2023-08-04 08:20:58,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=87, PETRI_TRANSITIONS=77} [2023-08-04 08:20:58,466 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2023-08-04 08:20:58,466 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 77 transitions, 334 flow [2023-08-04 08:20:58,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:58,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:20:58,467 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:20:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 08:20:58,467 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:20:58,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:20:58,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2127994237, now seen corresponding path program 3 times [2023-08-04 08:20:58,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:20:58,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934181175] [2023-08-04 08:20:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:20:58,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:20:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:20:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2023-08-04 08:20:58,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:20:58,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934181175] [2023-08-04 08:20:58,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934181175] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:20:58,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:20:58,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:20:58,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424711132] [2023-08-04 08:20:58,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:20:58,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:20:58,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:20:58,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:20:58,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:20:58,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 735 [2023-08-04 08:20:58,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 77 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:20:58,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:20:58,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 735 [2023-08-04 08:20:58,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:10,479 INFO L124 PetriNetUnfolderBase]: 113725/152128 cut-off events. [2023-08-04 08:21:10,479 INFO L125 PetriNetUnfolderBase]: For 130117/130117 co-relation queries the response was YES. [2023-08-04 08:21:11,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406068 conditions, 152128 events. 113725/152128 cut-off events. For 130117/130117 co-relation queries the response was YES. Maximal size of possible extension queue 3272. Compared 967813 event pairs, 47643 based on Foata normal form. 2457/144785 useless extension candidates. Maximal degree in co-relation 405991. Up to 75252 conditions per place. [2023-08-04 08:21:11,583 INFO L140 encePairwiseOnDemand]: 729/735 looper letters, 164 selfloop transitions, 5 changer transitions 0/173 dead transitions. [2023-08-04 08:21:11,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 173 transitions, 1073 flow [2023-08-04 08:21:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1379 transitions. [2023-08-04 08:21:11,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46904761904761905 [2023-08-04 08:21:11,585 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1379 transitions. [2023-08-04 08:21:11,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1379 transitions. [2023-08-04 08:21:11,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:11,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1379 transitions. [2023-08-04 08:21:11,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 344.75) internal successors, (1379), 4 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:11,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:11,589 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:11,589 INFO L175 Difference]: Start difference. First operand has 87 places, 77 transitions, 334 flow. Second operand 4 states and 1379 transitions. [2023-08-04 08:21:11,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 173 transitions, 1073 flow [2023-08-04 08:21:13,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 173 transitions, 1067 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:13,254 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 372 flow [2023-08-04 08:21:13,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=372, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2023-08-04 08:21:13,254 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 34 predicate places. [2023-08-04 08:21:13,255 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 372 flow [2023-08-04 08:21:13,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.25) internal successors, (1273), 4 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:13,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:13,255 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:21:13,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-04 08:21:13,255 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:13,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:13,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1415170865, now seen corresponding path program 4 times [2023-08-04 08:21:13,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:13,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136034733] [2023-08-04 08:21:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:13,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-04 08:21:13,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136034733] [2023-08-04 08:21:13,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136034733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:21:13,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:21:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:21:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369133117] [2023-08-04 08:21:13,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:21:13,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:21:13,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:21:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:21:13,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 735 [2023-08-04 08:21:13,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:13,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:13,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 735 [2023-08-04 08:21:13,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:21:36,248 INFO L124 PetriNetUnfolderBase]: 181065/239360 cut-off events. [2023-08-04 08:21:36,249 INFO L125 PetriNetUnfolderBase]: For 268701/268701 co-relation queries the response was YES. [2023-08-04 08:21:37,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672987 conditions, 239360 events. 181065/239360 cut-off events. For 268701/268701 co-relation queries the response was YES. Maximal size of possible extension queue 5269. Compared 1583984 event pairs, 34082 based on Foata normal form. 0/226909 useless extension candidates. Maximal degree in co-relation 672908. Up to 149654 conditions per place. [2023-08-04 08:21:37,759 INFO L140 encePairwiseOnDemand]: 728/735 looper letters, 146 selfloop transitions, 7 changer transitions 0/157 dead transitions. [2023-08-04 08:21:37,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 157 transitions, 1021 flow [2023-08-04 08:21:37,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:21:37,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:21:37,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1358 transitions. [2023-08-04 08:21:37,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2023-08-04 08:21:37,762 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1358 transitions. [2023-08-04 08:21:37,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1358 transitions. [2023-08-04 08:21:37,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:21:37,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1358 transitions. [2023-08-04 08:21:37,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 339.5) internal successors, (1358), 4 states have internal predecessors, (1358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:37,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:37,766 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:37,766 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 372 flow. Second operand 4 states and 1358 transitions. [2023-08-04 08:21:37,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 157 transitions, 1021 flow [2023-08-04 08:21:38,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 157 transitions, 1006 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-04 08:21:39,001 INFO L231 Difference]: Finished difference. Result has 96 places, 84 transitions, 422 flow [2023-08-04 08:21:39,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=422, PETRI_PLACES=96, PETRI_TRANSITIONS=84} [2023-08-04 08:21:39,001 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 39 predicate places. [2023-08-04 08:21:39,001 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 84 transitions, 422 flow [2023-08-04 08:21:39,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:39,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:21:39,002 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:21:39,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-04 08:21:39,002 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:21:39,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:21:39,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1064379893, now seen corresponding path program 1 times [2023-08-04 08:21:39,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:21:39,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130129701] [2023-08-04 08:21:39,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:21:39,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:21:39,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:21:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-08-04 08:21:39,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:21:39,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130129701] [2023-08-04 08:21:39,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130129701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:21:39,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:21:39,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:21:39,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776398108] [2023-08-04 08:21:39,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:21:39,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:21:39,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:21:39,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:21:39,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:21:39,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 735 [2023-08-04 08:21:39,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 84 transitions, 422 flow. Second operand has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:21:39,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:21:39,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 735 [2023-08-04 08:21:39,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:22:11,555 INFO L124 PetriNetUnfolderBase]: 275260/367722 cut-off events. [2023-08-04 08:22:11,556 INFO L125 PetriNetUnfolderBase]: For 439273/439273 co-relation queries the response was YES. [2023-08-04 08:22:12,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1052750 conditions, 367722 events. 275260/367722 cut-off events. For 439273/439273 co-relation queries the response was YES. Maximal size of possible extension queue 7359. Compared 2515071 event pairs, 133114 based on Foata normal form. 1382/357739 useless extension candidates. Maximal degree in co-relation 1052665. Up to 168711 conditions per place. [2023-08-04 08:22:14,091 INFO L140 encePairwiseOnDemand]: 730/735 looper letters, 167 selfloop transitions, 6 changer transitions 0/177 dead transitions. [2023-08-04 08:22:14,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 177 transitions, 1183 flow [2023-08-04 08:22:14,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:22:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:22:14,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1371 transitions. [2023-08-04 08:22:14,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4663265306122449 [2023-08-04 08:22:14,094 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1371 transitions. [2023-08-04 08:22:14,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1371 transitions. [2023-08-04 08:22:14,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:22:14,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1371 transitions. [2023-08-04 08:22:14,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 342.75) internal successors, (1371), 4 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:14,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:14,097 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 735.0) internal successors, (3675), 5 states have internal predecessors, (3675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:14,097 INFO L175 Difference]: Start difference. First operand has 96 places, 84 transitions, 422 flow. Second operand 4 states and 1371 transitions. [2023-08-04 08:22:14,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 177 transitions, 1183 flow [2023-08-04 08:22:23,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 177 transitions, 1183 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 08:22:23,108 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 461 flow [2023-08-04 08:22:23,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=735, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=461, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2023-08-04 08:22:23,109 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2023-08-04 08:22:23,109 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 461 flow [2023-08-04 08:22:23,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 319.25) internal successors, (1277), 4 states have internal predecessors, (1277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:23,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:22:23,109 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 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, 1, 1] [2023-08-04 08:22:23,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-08-04 08:22:23,110 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:22:23,110 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:22:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash 115560459, now seen corresponding path program 1 times [2023-08-04 08:22:23,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:22:23,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739014136] [2023-08-04 08:22:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:22:23,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:22:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:22:23,321 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-08-04 08:22:23,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:22:23,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739014136] [2023-08-04 08:22:23,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739014136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:22:23,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:22:23,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 08:22:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248934782] [2023-08-04 08:22:23,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:22:23,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 08:22:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:22:23,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 08:22:23,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 08:22:23,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 309 out of 735 [2023-08-04 08:22:23,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 461 flow. Second operand has 4 states, 4 states have (on average 318.0) internal successors, (1272), 4 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:22:23,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:22:23,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 309 of 735 [2023-08-04 08:22:23,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand