/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 16:00:17,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 16:00:17,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-24 16:00:17,496 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 16:00:17,496 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 16:00:17,521 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 16:00:17,522 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 16:00:17,522 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 16:00:17,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 16:00:17,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 16:00:17,523 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 16:00:17,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 16:00:17,524 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 16:00:17,524 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 16:00:17,525 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 16:00:17,525 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 16:00:17,525 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 16:00:17,526 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 16:00:17,526 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 16:00:17,526 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 16:00:17,527 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 16:00:17,531 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 16:00:17,531 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 16:00:17,531 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 16:00:17,535 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 16:00:17,535 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 16:00:17,535 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 16:00:17,536 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:00:17,537 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 16:00:17,537 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 16:00:17,538 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 16:00:17,538 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 16:00:17,538 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 16:00:17,539 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 16:00:17,539 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 16:00:17,539 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-24 16:00:17,834 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 16:00:17,853 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 16:00:17,855 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 16:00:17,856 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 16:00:17,856 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 16:00:17,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-24 16:00:19,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 16:00:19,270 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 16:00:19,270 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c [2023-08-24 16:00:19,276 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bbd31dae/8f10915a72004089bff749b061b520d8/FLAG58171ac17 [2023-08-24 16:00:19,286 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bbd31dae/8f10915a72004089bff749b061b520d8 [2023-08-24 16:00:19,288 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 16:00:19,289 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 16:00:19,290 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 16:00:19,290 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 16:00:19,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 16:00:19,293 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1885fa47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19, skipping insertion in model container [2023-08-24 16:00:19,293 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,310 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 16:00:19,475 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2023-08-24 16:00:19,480 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:00:19,487 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 16:00:19,526 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-mult-4.wvr.c[2612,2625] [2023-08-24 16:00:19,527 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 16:00:19,533 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:00:19,534 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 16:00:19,541 INFO L206 MainTranslator]: Completed translation [2023-08-24 16:00:19,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19 WrapperNode [2023-08-24 16:00:19,544 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 16:00:19,545 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 16:00:19,545 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 16:00:19,545 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 16:00:19,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,567 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,596 INFO L138 Inliner]: procedures = 23, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 121 [2023-08-24 16:00:19,597 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 16:00:19,597 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 16:00:19,597 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 16:00:19,597 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 16:00:19,604 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,616 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,616 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,626 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,629 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,630 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 16:00:19,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 16:00:19,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 16:00:19,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 16:00:19,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (1/1) ... [2023-08-24 16:00:19,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 16:00:19,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:19,674 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-24 16:00:19,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-24 16:00:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 16:00:19,721 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 16:00:19,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 16:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 16:00:19,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 16:00:19,722 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-24 16:00:19,722 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-24 16:00:19,723 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 16:00:19,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 16:00:19,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 16:00:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 16:00:19,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 16:00:19,726 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-24 16:00:19,832 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 16:00:19,834 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 16:00:20,071 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 16:00:20,106 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 16:00:20,106 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-24 16:00:20,108 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:00:20 BoogieIcfgContainer [2023-08-24 16:00:20,108 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 16:00:20,110 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 16:00:20,110 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 16:00:20,113 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 16:00:20,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 04:00:19" (1/3) ... [2023-08-24 16:00:20,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdccbe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:00:20, skipping insertion in model container [2023-08-24 16:00:20,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 04:00:19" (2/3) ... [2023-08-24 16:00:20,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fdccbe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 04:00:20, skipping insertion in model container [2023-08-24 16:00:20,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 04:00:20" (3/3) ... [2023-08-24 16:00:20,115 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-mult-4.wvr.c [2023-08-24 16:00:20,130 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 16:00:20,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 16:00:20,130 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 16:00:20,206 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-24 16:00:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 296 flow [2023-08-24 16:00:20,300 INFO L124 PetriNetUnfolderBase]: 10/128 cut-off events. [2023-08-24 16:00:20,300 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 16:00:20,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 128 events. 10/128 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 110 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-24 16:00:20,307 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 132 transitions, 296 flow [2023-08-24 16:00:20,311 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 116 transitions, 256 flow [2023-08-24 16:00:20,314 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 16:00:20,322 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 116 transitions, 256 flow [2023-08-24 16:00:20,324 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 116 transitions, 256 flow [2023-08-24 16:00:20,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 116 transitions, 256 flow [2023-08-24 16:00:20,381 INFO L124 PetriNetUnfolderBase]: 10/116 cut-off events. [2023-08-24 16:00:20,381 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 16:00:20,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 116 events. 10/116 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 109 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-24 16:00:20,385 INFO L119 LiptonReduction]: Number of co-enabled transitions 2904 [2023-08-24 16:00:23,748 INFO L134 LiptonReduction]: Checked pairs total: 2879 [2023-08-24 16:00:23,748 INFO L136 LiptonReduction]: Total number of compositions: 98 [2023-08-24 16:00:23,761 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 16:00:23,766 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1dcf9d3f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 16:00:23,766 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-24 16:00:23,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 16:00:23,773 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-08-24 16:00:23,773 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-24 16:00:23,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:23,774 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] [2023-08-24 16:00:23,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:23,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:23,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1110604598, now seen corresponding path program 1 times [2023-08-24 16:00:23,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:23,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564528781] [2023-08-24 16:00:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:24,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:24,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:24,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564528781] [2023-08-24 16:00:24,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564528781] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:24,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:24,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-24 16:00:24,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112755742] [2023-08-24 16:00:24,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:24,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-24 16:00:24,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:24,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-24 16:00:24,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-24 16:00:24,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 230 [2023-08-24 16:00:24,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:24,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:24,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 230 [2023-08-24 16:00:24,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:24,595 INFO L124 PetriNetUnfolderBase]: 1343/1736 cut-off events. [2023-08-24 16:00:24,595 INFO L125 PetriNetUnfolderBase]: For 131/131 co-relation queries the response was YES. [2023-08-24 16:00:24,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3612 conditions, 1736 events. 1343/1736 cut-off events. For 131/131 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5907 event pairs, 215 based on Foata normal form. 1/1046 useless extension candidates. Maximal degree in co-relation 2691. Up to 1515 conditions per place. [2023-08-24 16:00:24,611 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 39 selfloop transitions, 3 changer transitions 3/49 dead transitions. [2023-08-24 16:00:24,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 49 transitions, 233 flow [2023-08-24 16:00:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-24 16:00:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-24 16:00:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-24 16:00:24,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5521739130434783 [2023-08-24 16:00:24,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-24 16:00:24,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-24 16:00:24,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:24,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-24 16:00:24,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:24,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:24,640 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 230.0) internal successors, (920), 4 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:24,642 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 381 transitions. [2023-08-24 16:00:24,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 49 transitions, 233 flow [2023-08-24 16:00:24,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 49 transitions, 203 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-24 16:00:24,649 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 89 flow [2023-08-24 16:00:24,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2023-08-24 16:00:24,656 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-08-24 16:00:24,657 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 89 flow [2023-08-24 16:00:24,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:24,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:24,657 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] [2023-08-24 16:00:24,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 16:00:24,658 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:24,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1946734542, now seen corresponding path program 1 times [2023-08-24 16:00:24,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:24,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699444888] [2023-08-24 16:00:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:24,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:24,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:24,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:24,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699444888] [2023-08-24 16:00:24,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699444888] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:24,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:24,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:00:24,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719767863] [2023-08-24 16:00:24,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:24,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:24,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:24,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:00:24,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:24,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 89 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:24,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:24,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:24,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:25,216 INFO L124 PetriNetUnfolderBase]: 1863/2558 cut-off events. [2023-08-24 16:00:25,217 INFO L125 PetriNetUnfolderBase]: For 766/766 co-relation queries the response was YES. [2023-08-24 16:00:25,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5972 conditions, 2558 events. 1863/2558 cut-off events. For 766/766 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 11084 event pairs, 489 based on Foata normal form. 242/2746 useless extension candidates. Maximal degree in co-relation 2470. Up to 1349 conditions per place. [2023-08-24 16:00:25,232 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 65 selfloop transitions, 5 changer transitions 2/74 dead transitions. [2023-08-24 16:00:25,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 74 transitions, 346 flow [2023-08-24 16:00:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:25,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:25,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 559 transitions. [2023-08-24 16:00:25,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4860869565217391 [2023-08-24 16:00:25,239 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 559 transitions. [2023-08-24 16:00:25,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 559 transitions. [2023-08-24 16:00:25,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:25,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 559 transitions. [2023-08-24 16:00:25,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 111.8) internal successors, (559), 5 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,245 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,246 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 89 flow. Second operand 5 states and 559 transitions. [2023-08-24 16:00:25,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 74 transitions, 346 flow [2023-08-24 16:00:25,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 74 transitions, 341 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 16:00:25,249 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 142 flow [2023-08-24 16:00:25,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-24 16:00:25,251 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-24 16:00:25,253 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 142 flow [2023-08-24 16:00:25,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:25,257 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] [2023-08-24 16:00:25,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-24 16:00:25,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:25,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:25,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1305937910, now seen corresponding path program 2 times [2023-08-24 16:00:25,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:25,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238475723] [2023-08-24 16:00:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:25,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:25,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:25,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238475723] [2023-08-24 16:00:25,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238475723] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:25,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:25,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:00:25,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241384711] [2023-08-24 16:00:25,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:25,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:00:25,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:25,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:00:25,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:00:25,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 230 [2023-08-24 16:00:25,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:25,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 230 [2023-08-24 16:00:25,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:25,668 INFO L124 PetriNetUnfolderBase]: 1723/2398 cut-off events. [2023-08-24 16:00:25,669 INFO L125 PetriNetUnfolderBase]: For 3174/3519 co-relation queries the response was YES. [2023-08-24 16:00:25,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7647 conditions, 2398 events. 1723/2398 cut-off events. For 3174/3519 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10528 event pairs, 441 based on Foata normal form. 421/2773 useless extension candidates. Maximal degree in co-relation 1740. Up to 1550 conditions per place. [2023-08-24 16:00:25,682 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 55 selfloop transitions, 4 changer transitions 8/71 dead transitions. [2023-08-24 16:00:25,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 71 transitions, 403 flow [2023-08-24 16:00:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:00:25,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:00:25,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-24 16:00:25,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065217391304347 [2023-08-24 16:00:25,684 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-24 16:00:25,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-24 16:00:25,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:25,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-24 16:00:25,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,688 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,688 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 142 flow. Second operand 4 states and 466 transitions. [2023-08-24 16:00:25,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 71 transitions, 403 flow [2023-08-24 16:00:25,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 71 transitions, 396 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-24 16:00:25,694 INFO L231 Difference]: Finished difference. Result has 43 places, 37 transitions, 168 flow [2023-08-24 16:00:25,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=37} [2023-08-24 16:00:25,696 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-24 16:00:25,698 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 37 transitions, 168 flow [2023-08-24 16:00:25,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:25,699 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] [2023-08-24 16:00:25,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-24 16:00:25,700 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:25,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:25,700 INFO L85 PathProgramCache]: Analyzing trace with hash 2109315396, now seen corresponding path program 3 times [2023-08-24 16:00:25,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:25,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218876658] [2023-08-24 16:00:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:25,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:25,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:25,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:25,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218876658] [2023-08-24 16:00:25,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218876658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:25,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:25,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:00:25,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330479845] [2023-08-24 16:00:25,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:25,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:25,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:25,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:25,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:00:25,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:25,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 37 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:25,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:25,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:25,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:26,118 INFO L124 PetriNetUnfolderBase]: 2139/2954 cut-off events. [2023-08-24 16:00:26,118 INFO L125 PetriNetUnfolderBase]: For 5570/5902 co-relation queries the response was YES. [2023-08-24 16:00:26,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9996 conditions, 2954 events. 2139/2954 cut-off events. For 5570/5902 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 13175 event pairs, 800 based on Foata normal form. 324/3224 useless extension candidates. Maximal degree in co-relation 4257. Up to 2391 conditions per place. [2023-08-24 16:00:26,138 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 51 selfloop transitions, 10 changer transitions 10/73 dead transitions. [2023-08-24 16:00:26,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 73 transitions, 474 flow [2023-08-24 16:00:26,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:26,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 544 transitions. [2023-08-24 16:00:26,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47304347826086957 [2023-08-24 16:00:26,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 544 transitions. [2023-08-24 16:00:26,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 544 transitions. [2023-08-24 16:00:26,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:26,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 544 transitions. [2023-08-24 16:00:26,143 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 108.8) internal successors, (544), 5 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,145 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,145 INFO L175 Difference]: Start difference. First operand has 43 places, 37 transitions, 168 flow. Second operand 5 states and 544 transitions. [2023-08-24 16:00:26,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 73 transitions, 474 flow [2023-08-24 16:00:26,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 73 transitions, 467 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-24 16:00:26,152 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 246 flow [2023-08-24 16:00:26,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2023-08-24 16:00:26,154 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-08-24 16:00:26,154 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 246 flow [2023-08-24 16:00:26,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:26,155 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] [2023-08-24 16:00:26,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-24 16:00:26,155 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:26,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:26,155 INFO L85 PathProgramCache]: Analyzing trace with hash 360974616, now seen corresponding path program 1 times [2023-08-24 16:00:26,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:26,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541684476] [2023-08-24 16:00:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:26,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:26,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:26,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541684476] [2023-08-24 16:00:26,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541684476] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:26,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:26,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:00:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361828951] [2023-08-24 16:00:26,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:26,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:00:26,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:00:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:00:26,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 230 [2023-08-24 16:00:26,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 246 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:26,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 230 [2023-08-24 16:00:26,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:26,595 INFO L124 PetriNetUnfolderBase]: 2523/3424 cut-off events. [2023-08-24 16:00:26,595 INFO L125 PetriNetUnfolderBase]: For 9115/10055 co-relation queries the response was YES. [2023-08-24 16:00:26,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13227 conditions, 3424 events. 2523/3424 cut-off events. For 9115/10055 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 14851 event pairs, 495 based on Foata normal form. 385/3725 useless extension candidates. Maximal degree in co-relation 6596. Up to 2404 conditions per place. [2023-08-24 16:00:26,621 INFO L140 encePairwiseOnDemand]: 225/230 looper letters, 65 selfloop transitions, 6 changer transitions 3/80 dead transitions. [2023-08-24 16:00:26,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 80 transitions, 554 flow [2023-08-24 16:00:26,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:00:26,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:00:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 466 transitions. [2023-08-24 16:00:26,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065217391304347 [2023-08-24 16:00:26,623 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 466 transitions. [2023-08-24 16:00:26,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 466 transitions. [2023-08-24 16:00:26,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:26,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 466 transitions. [2023-08-24 16:00:26,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,627 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,627 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 246 flow. Second operand 4 states and 466 transitions. [2023-08-24 16:00:26,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 80 transitions, 554 flow [2023-08-24 16:00:26,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 80 transitions, 544 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-24 16:00:26,636 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 272 flow [2023-08-24 16:00:26,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=272, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2023-08-24 16:00:26,636 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 14 predicate places. [2023-08-24 16:00:26,637 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 272 flow [2023-08-24 16:00:26,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:26,637 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] [2023-08-24 16:00:26,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-24 16:00:26,637 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:26,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:26,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1832825554, now seen corresponding path program 2 times [2023-08-24 16:00:26,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:26,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742447431] [2023-08-24 16:00:26,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:26,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:26,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:26,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:26,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742447431] [2023-08-24 16:00:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742447431] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:26,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:26,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:00:26,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601844369] [2023-08-24 16:00:26,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:26,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:26,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:26,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:00:26,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:26,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:26,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:26,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:26,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:27,129 INFO L124 PetriNetUnfolderBase]: 3044/4127 cut-off events. [2023-08-24 16:00:27,129 INFO L125 PetriNetUnfolderBase]: For 13004/13592 co-relation queries the response was YES. [2023-08-24 16:00:27,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16376 conditions, 4127 events. 3044/4127 cut-off events. For 13004/13592 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 18030 event pairs, 940 based on Foata normal form. 595/4573 useless extension candidates. Maximal degree in co-relation 6980. Up to 2908 conditions per place. [2023-08-24 16:00:27,160 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 56 selfloop transitions, 12 changer transitions 14/85 dead transitions. [2023-08-24 16:00:27,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 85 transitions, 644 flow [2023-08-24 16:00:27,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:27,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:27,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 548 transitions. [2023-08-24 16:00:27,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4765217391304348 [2023-08-24 16:00:27,163 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 548 transitions. [2023-08-24 16:00:27,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 548 transitions. [2023-08-24 16:00:27,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:27,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 548 transitions. [2023-08-24 16:00:27,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.6) internal successors, (548), 5 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,167 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,167 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 272 flow. Second operand 5 states and 548 transitions. [2023-08-24 16:00:27,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 85 transitions, 644 flow [2023-08-24 16:00:27,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 85 transitions, 638 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-24 16:00:27,178 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 376 flow [2023-08-24 16:00:27,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=376, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2023-08-24 16:00:27,181 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-08-24 16:00:27,181 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 376 flow [2023-08-24 16:00:27,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:27,182 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] [2023-08-24 16:00:27,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-24 16:00:27,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:27,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 62305846, now seen corresponding path program 3 times [2023-08-24 16:00:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:27,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144337776] [2023-08-24 16:00:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:27,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:27,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:27,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144337776] [2023-08-24 16:00:27,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144337776] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:27,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:27,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:00:27,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642510100] [2023-08-24 16:00:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:27,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:27,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:27,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:27,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:00:27,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:27,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:27,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:27,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:27,783 INFO L124 PetriNetUnfolderBase]: 3251/4496 cut-off events. [2023-08-24 16:00:27,784 INFO L125 PetriNetUnfolderBase]: For 17117/17811 co-relation queries the response was YES. [2023-08-24 16:00:27,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19050 conditions, 4496 events. 3251/4496 cut-off events. For 17117/17811 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21248 event pairs, 1085 based on Foata normal form. 926/5315 useless extension candidates. Maximal degree in co-relation 7632. Up to 3105 conditions per place. [2023-08-24 16:00:27,810 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 69 selfloop transitions, 9 changer transitions 17/98 dead transitions. [2023-08-24 16:00:27,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 98 transitions, 760 flow [2023-08-24 16:00:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:27,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:27,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 561 transitions. [2023-08-24 16:00:27,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48782608695652174 [2023-08-24 16:00:27,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 561 transitions. [2023-08-24 16:00:27,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 561 transitions. [2023-08-24 16:00:27,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:27,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 561 transitions. [2023-08-24 16:00:27,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 112.2) internal successors, (561), 5 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,816 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,816 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 376 flow. Second operand 5 states and 561 transitions. [2023-08-24 16:00:27,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 98 transitions, 760 flow [2023-08-24 16:00:27,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 98 transitions, 736 flow, removed 12 selfloop flow, removed 0 redundant places. [2023-08-24 16:00:27,835 INFO L231 Difference]: Finished difference. Result has 62 places, 50 transitions, 387 flow [2023-08-24 16:00:27,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=387, PETRI_PLACES=62, PETRI_TRANSITIONS=50} [2023-08-24 16:00:27,836 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 24 predicate places. [2023-08-24 16:00:27,836 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 50 transitions, 387 flow [2023-08-24 16:00:27,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:27,836 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] [2023-08-24 16:00:27,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-24 16:00:27,837 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:27,837 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:27,837 INFO L85 PathProgramCache]: Analyzing trace with hash 488958460, now seen corresponding path program 4 times [2023-08-24 16:00:27,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:27,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228353381] [2023-08-24 16:00:27,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:27,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:27,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:27,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:27,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228353381] [2023-08-24 16:00:27,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228353381] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:27,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:27,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:00:27,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590875291] [2023-08-24 16:00:27,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:27,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:27,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:27,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:27,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:00:27,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:27,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 50 transitions, 387 flow. Second operand has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:27,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:27,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:27,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:28,513 INFO L124 PetriNetUnfolderBase]: 3793/5410 cut-off events. [2023-08-24 16:00:28,513 INFO L125 PetriNetUnfolderBase]: For 34351/36065 co-relation queries the response was YES. [2023-08-24 16:00:28,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23536 conditions, 5410 events. 3793/5410 cut-off events. For 34351/36065 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 26349 event pairs, 1299 based on Foata normal form. 1897/7246 useless extension candidates. Maximal degree in co-relation 11578. Up to 3425 conditions per place. [2023-08-24 16:00:28,544 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 96 selfloop transitions, 7 changer transitions 3/111 dead transitions. [2023-08-24 16:00:28,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 111 transitions, 1084 flow [2023-08-24 16:00:28,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:28,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 551 transitions. [2023-08-24 16:00:28,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4791304347826087 [2023-08-24 16:00:28,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 551 transitions. [2023-08-24 16:00:28,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 551 transitions. [2023-08-24 16:00:28,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:28,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 551 transitions. [2023-08-24 16:00:28,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 110.2) internal successors, (551), 5 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:28,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:28,550 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:28,550 INFO L175 Difference]: Start difference. First operand has 62 places, 50 transitions, 387 flow. Second operand 5 states and 551 transitions. [2023-08-24 16:00:28,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 111 transitions, 1084 flow [2023-08-24 16:00:28,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 111 transitions, 1032 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-24 16:00:28,565 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 509 flow [2023-08-24 16:00:28,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=509, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2023-08-24 16:00:28,566 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2023-08-24 16:00:28,566 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 509 flow [2023-08-24 16:00:28,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 101.8) internal successors, (509), 5 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:28,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:28,567 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] [2023-08-24 16:00:28,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-24 16:00:28,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:28,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:28,567 INFO L85 PathProgramCache]: Analyzing trace with hash 837742142, now seen corresponding path program 5 times [2023-08-24 16:00:28,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:28,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810811204] [2023-08-24 16:00:28,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:28,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:28,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:28,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810811204] [2023-08-24 16:00:28,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810811204] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:28,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:28,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:00:28,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649815655] [2023-08-24 16:00:28,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:28,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:00:28,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:00:28,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:00:28,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 230 [2023-08-24 16:00:28,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 509 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:28,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:28,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 230 [2023-08-24 16:00:28,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:29,135 INFO L124 PetriNetUnfolderBase]: 3591/5259 cut-off events. [2023-08-24 16:00:29,136 INFO L125 PetriNetUnfolderBase]: For 38435/40165 co-relation queries the response was YES. [2023-08-24 16:00:29,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25892 conditions, 5259 events. 3591/5259 cut-off events. For 38435/40165 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 27994 event pairs, 1602 based on Foata normal form. 1610/6695 useless extension candidates. Maximal degree in co-relation 12853. Up to 3429 conditions per place. [2023-08-24 16:00:29,169 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 72 selfloop transitions, 9 changer transitions 5/94 dead transitions. [2023-08-24 16:00:29,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 94 transitions, 914 flow [2023-08-24 16:00:29,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:00:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:00:29,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2023-08-24 16:00:29,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021739130434782 [2023-08-24 16:00:29,171 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2023-08-24 16:00:29,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2023-08-24 16:00:29,172 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:29,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2023-08-24 16:00:29,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,175 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,175 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 509 flow. Second operand 4 states and 462 transitions. [2023-08-24 16:00:29,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 94 transitions, 914 flow [2023-08-24 16:00:29,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 899 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-24 16:00:29,192 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 527 flow [2023-08-24 16:00:29,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=527, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-24 16:00:29,193 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 30 predicate places. [2023-08-24 16:00:29,193 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 527 flow [2023-08-24 16:00:29,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:29,194 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] [2023-08-24 16:00:29,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-24 16:00:29,194 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:29,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2125842936, now seen corresponding path program 4 times [2023-08-24 16:00:29,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:29,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95224957] [2023-08-24 16:00:29,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:29,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:29,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:29,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95224957] [2023-08-24 16:00:29,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95224957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:29,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:29,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:00:29,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830370598] [2023-08-24 16:00:29,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:29,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:00:29,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:29,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:00:29,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:00:29,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 230 [2023-08-24 16:00:29,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 527 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:29,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 230 [2023-08-24 16:00:29,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:29,766 INFO L124 PetriNetUnfolderBase]: 3345/4989 cut-off events. [2023-08-24 16:00:29,766 INFO L125 PetriNetUnfolderBase]: For 37505/39267 co-relation queries the response was YES. [2023-08-24 16:00:29,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25519 conditions, 4989 events. 3345/4989 cut-off events. For 37505/39267 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 26611 event pairs, 1579 based on Foata normal form. 1790/6714 useless extension candidates. Maximal degree in co-relation 12943. Up to 4142 conditions per place. [2023-08-24 16:00:29,799 INFO L140 encePairwiseOnDemand]: 226/230 looper letters, 56 selfloop transitions, 8 changer transitions 22/92 dead transitions. [2023-08-24 16:00:29,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 92 transitions, 961 flow [2023-08-24 16:00:29,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:00:29,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:00:29,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2023-08-24 16:00:29,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5021739130434782 [2023-08-24 16:00:29,801 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2023-08-24 16:00:29,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2023-08-24 16:00:29,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:29,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2023-08-24 16:00:29,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,805 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,805 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 527 flow. Second operand 4 states and 462 transitions. [2023-08-24 16:00:29,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 92 transitions, 961 flow [2023-08-24 16:00:29,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 92 transitions, 943 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-24 16:00:29,823 INFO L231 Difference]: Finished difference. Result has 71 places, 51 transitions, 484 flow [2023-08-24 16:00:29,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=484, PETRI_PLACES=71, PETRI_TRANSITIONS=51} [2023-08-24 16:00:29,824 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 33 predicate places. [2023-08-24 16:00:29,824 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 51 transitions, 484 flow [2023-08-24 16:00:29,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:29,824 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] [2023-08-24 16:00:29,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-24 16:00:29,825 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:29,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:29,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1948438486, now seen corresponding path program 6 times [2023-08-24 16:00:29,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:29,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594656898] [2023-08-24 16:00:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:29,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:29,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:29,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594656898] [2023-08-24 16:00:29,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594656898] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:29,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:29,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-24 16:00:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834206282] [2023-08-24 16:00:29,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 16:00:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 16:00:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 16:00:29,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 230 [2023-08-24 16:00:29,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 51 transitions, 484 flow. Second operand has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:29,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:29,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 230 [2023-08-24 16:00:29,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:30,474 INFO L124 PetriNetUnfolderBase]: 4123/5852 cut-off events. [2023-08-24 16:00:30,475 INFO L125 PetriNetUnfolderBase]: For 61196/63785 co-relation queries the response was YES. [2023-08-24 16:00:30,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32433 conditions, 5852 events. 4123/5852 cut-off events. For 61196/63785 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 30016 event pairs, 1556 based on Foata normal form. 1620/7282 useless extension candidates. Maximal degree in co-relation 23574. Up to 3394 conditions per place. [2023-08-24 16:00:30,511 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 67 selfloop transitions, 19 changer transitions 7/100 dead transitions. [2023-08-24 16:00:30,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 100 transitions, 1178 flow [2023-08-24 16:00:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 16:00:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 16:00:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-24 16:00:30,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-24 16:00:30,513 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-24 16:00:30,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-24 16:00:30,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:30,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-24 16:00:30,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:30,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:30,516 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:30,516 INFO L175 Difference]: Start difference. First operand has 71 places, 51 transitions, 484 flow. Second operand 4 states and 460 transitions. [2023-08-24 16:00:30,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 100 transitions, 1178 flow [2023-08-24 16:00:30,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 100 transitions, 1150 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-08-24 16:00:30,536 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 791 flow [2023-08-24 16:00:30,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=791, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2023-08-24 16:00:30,536 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 34 predicate places. [2023-08-24 16:00:30,537 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 791 flow [2023-08-24 16:00:30,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 106.75) internal successors, (427), 4 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:30,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:30,537 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] [2023-08-24 16:00:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-24 16:00:30,537 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:30,538 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 2052477580, now seen corresponding path program 1 times [2023-08-24 16:00:30,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:30,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526941712] [2023-08-24 16:00:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:30,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:30,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526941712] [2023-08-24 16:00:30,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526941712] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:30,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 16:00:30,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-24 16:00:30,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206649254] [2023-08-24 16:00:30,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:30,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:30,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:30,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:30,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-24 16:00:30,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:30,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 791 flow. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:30,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:30,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:30,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:31,155 INFO L124 PetriNetUnfolderBase]: 3985/5458 cut-off events. [2023-08-24 16:00:31,155 INFO L125 PetriNetUnfolderBase]: For 68702/69685 co-relation queries the response was YES. [2023-08-24 16:00:31,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34827 conditions, 5458 events. 3985/5458 cut-off events. For 68702/69685 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 25262 event pairs, 1719 based on Foata normal form. 978/6356 useless extension candidates. Maximal degree in co-relation 26596. Up to 4261 conditions per place. [2023-08-24 16:00:31,189 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 72 selfloop transitions, 30 changer transitions 4/109 dead transitions. [2023-08-24 16:00:31,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 109 transitions, 1459 flow [2023-08-24 16:00:31,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:31,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 545 transitions. [2023-08-24 16:00:31,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47391304347826085 [2023-08-24 16:00:31,192 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 545 transitions. [2023-08-24 16:00:31,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 545 transitions. [2023-08-24 16:00:31,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:31,192 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 545 transitions. [2023-08-24 16:00:31,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 109.0) internal successors, (545), 5 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:31,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:31,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:31,196 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 791 flow. Second operand 5 states and 545 transitions. [2023-08-24 16:00:31,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 109 transitions, 1459 flow [2023-08-24 16:00:31,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 1311 flow, removed 63 selfloop flow, removed 2 redundant places. [2023-08-24 16:00:31,231 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 977 flow [2023-08-24 16:00:31,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=977, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2023-08-24 16:00:31,232 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2023-08-24 16:00:31,232 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 977 flow [2023-08-24 16:00:31,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:31,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:31,233 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] [2023-08-24 16:00:31,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-24 16:00:31,233 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:31,233 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:31,233 INFO L85 PathProgramCache]: Analyzing trace with hash 902268758, now seen corresponding path program 1 times [2023-08-24 16:00:31,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:31,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253611203] [2023-08-24 16:00:31,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:31,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:31,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:31,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253611203] [2023-08-24 16:00:31,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253611203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:00:31,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704541834] [2023-08-24 16:00:31,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:31,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:31,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:31,337 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:00:31,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-24 16:00:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:31,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 16:00:31,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:00:31,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:31,551 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-24 16:00:31,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704541834] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 16:00:31,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-24 16:00:31,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2023-08-24 16:00:31,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740836769] [2023-08-24 16:00:31,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 16:00:31,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-24 16:00:31,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:31,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-24 16:00:31,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-24 16:00:31,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:31,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 977 flow. Second operand has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:31,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:31,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:31,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:32,216 INFO L124 PetriNetUnfolderBase]: 5088/6977 cut-off events. [2023-08-24 16:00:32,216 INFO L125 PetriNetUnfolderBase]: For 70528/72160 co-relation queries the response was YES. [2023-08-24 16:00:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41843 conditions, 6977 events. 5088/6977 cut-off events. For 70528/72160 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 34159 event pairs, 1494 based on Foata normal form. 939/7804 useless extension candidates. Maximal degree in co-relation 34507. Up to 3450 conditions per place. [2023-08-24 16:00:32,258 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 117 selfloop transitions, 33 changer transitions 6/160 dead transitions. [2023-08-24 16:00:32,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 160 transitions, 2151 flow [2023-08-24 16:00:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 16:00:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 16:00:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 663 transitions. [2023-08-24 16:00:32,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48043478260869565 [2023-08-24 16:00:32,260 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 663 transitions. [2023-08-24 16:00:32,260 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 663 transitions. [2023-08-24 16:00:32,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:32,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 663 transitions. [2023-08-24 16:00:32,262 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 110.5) internal successors, (663), 6 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:32,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:32,264 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 230.0) internal successors, (1610), 7 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:32,265 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 977 flow. Second operand 6 states and 663 transitions. [2023-08-24 16:00:32,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 160 transitions, 2151 flow [2023-08-24 16:00:32,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 160 transitions, 2019 flow, removed 41 selfloop flow, removed 5 redundant places. [2023-08-24 16:00:32,289 INFO L231 Difference]: Finished difference. Result has 77 places, 102 transitions, 1453 flow [2023-08-24 16:00:32,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1453, PETRI_PLACES=77, PETRI_TRANSITIONS=102} [2023-08-24 16:00:32,290 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 39 predicate places. [2023-08-24 16:00:32,290 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 102 transitions, 1453 flow [2023-08-24 16:00:32,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 102.0) internal successors, (510), 5 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:32,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:32,290 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] [2023-08-24 16:00:32,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-24 16:00:32,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 16:00:32,495 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:32,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1962855654, now seen corresponding path program 2 times [2023-08-24 16:00:32,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:32,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673584577] [2023-08-24 16:00:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:32,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:32,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673584577] [2023-08-24 16:00:32,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673584577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:00:32,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036168764] [2023-08-24 16:00:32,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:00:32,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:32,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:32,606 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:00:32,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-24 16:00:32,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:00:32,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:00:32,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 16:00:32,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:00:32,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:32,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:00:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:32,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036168764] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:00:32,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:00:32,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-08-24 16:00:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277806944] [2023-08-24 16:00:32,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:00:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 16:00:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 16:00:32,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-24 16:00:32,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-24 16:00:32,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 102 transitions, 1453 flow. Second operand has 9 states, 9 states have (on average 98.33333333333333) internal successors, (885), 9 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:32,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:32,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-24 16:00:32,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:34,263 INFO L124 PetriNetUnfolderBase]: 8141/10979 cut-off events. [2023-08-24 16:00:34,263 INFO L125 PetriNetUnfolderBase]: For 138169/138770 co-relation queries the response was YES. [2023-08-24 16:00:34,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73990 conditions, 10979 events. 8141/10979 cut-off events. For 138169/138770 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 52349 event pairs, 1441 based on Foata normal form. 1092/12041 useless extension candidates. Maximal degree in co-relation 62964. Up to 5447 conditions per place. [2023-08-24 16:00:34,313 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 179 selfloop transitions, 76 changer transitions 8/265 dead transitions. [2023-08-24 16:00:34,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 265 transitions, 3817 flow [2023-08-24 16:00:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-24 16:00:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-24 16:00:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1154 transitions. [2023-08-24 16:00:34,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561264822134387 [2023-08-24 16:00:34,317 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1154 transitions. [2023-08-24 16:00:34,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1154 transitions. [2023-08-24 16:00:34,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:34,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1154 transitions. [2023-08-24 16:00:34,320 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 104.9090909090909) internal successors, (1154), 11 states have internal predecessors, (1154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:34,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:34,323 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 230.0) internal successors, (2760), 12 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:34,324 INFO L175 Difference]: Start difference. First operand has 77 places, 102 transitions, 1453 flow. Second operand 11 states and 1154 transitions. [2023-08-24 16:00:34,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 265 transitions, 3817 flow [2023-08-24 16:00:34,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 265 transitions, 3785 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-24 16:00:34,423 INFO L231 Difference]: Finished difference. Result has 94 places, 139 transitions, 2358 flow [2023-08-24 16:00:34,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2358, PETRI_PLACES=94, PETRI_TRANSITIONS=139} [2023-08-24 16:00:34,424 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-08-24 16:00:34,424 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 139 transitions, 2358 flow [2023-08-24 16:00:34,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 98.33333333333333) internal successors, (885), 9 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:34,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:34,425 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] [2023-08-24 16:00:34,433 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-24 16:00:34,629 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,SelfDestructingSolverStorable13 [2023-08-24 16:00:34,629 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:34,630 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 343102058, now seen corresponding path program 3 times [2023-08-24 16:00:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:34,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94775206] [2023-08-24 16:00:34,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:34,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:34,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94775206] [2023-08-24 16:00:34,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94775206] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:00:34,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13367674] [2023-08-24 16:00:34,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:00:34,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:34,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:34,739 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:00:34,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-24 16:00:34,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:00:34,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:00:34,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-24 16:00:34,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:00:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:34,888 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:00:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:34,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13367674] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:00:34,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:00:34,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-24 16:00:34,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020153765] [2023-08-24 16:00:34,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:00:34,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 16:00:34,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:34,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 16:00:34,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-24 16:00:34,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 230 [2023-08-24 16:00:34,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 139 transitions, 2358 flow. Second operand has 11 states, 11 states have (on average 93.27272727272727) internal successors, (1026), 11 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:34,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:34,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 230 [2023-08-24 16:00:34,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:36,690 INFO L124 PetriNetUnfolderBase]: 9682/12701 cut-off events. [2023-08-24 16:00:36,690 INFO L125 PetriNetUnfolderBase]: For 219263/219263 co-relation queries the response was YES. [2023-08-24 16:00:36,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97675 conditions, 12701 events. 9682/12701 cut-off events. For 219263/219263 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 56227 event pairs, 1745 based on Foata normal form. 706/13407 useless extension candidates. Maximal degree in co-relation 82695. Up to 6959 conditions per place. [2023-08-24 16:00:36,810 INFO L140 encePairwiseOnDemand]: 220/230 looper letters, 198 selfloop transitions, 259 changer transitions 6/463 dead transitions. [2023-08-24 16:00:36,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 463 transitions, 8174 flow [2023-08-24 16:00:36,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 16:00:36,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 16:00:36,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1522 transitions. [2023-08-24 16:00:36,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44115942028985505 [2023-08-24 16:00:36,816 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1522 transitions. [2023-08-24 16:00:36,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1522 transitions. [2023-08-24 16:00:36,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:36,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1522 transitions. [2023-08-24 16:00:36,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 101.46666666666667) internal successors, (1522), 15 states have internal predecessors, (1522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:36,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 230.0) internal successors, (3680), 16 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:36,825 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 230.0) internal successors, (3680), 16 states have internal predecessors, (3680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:36,825 INFO L175 Difference]: Start difference. First operand has 94 places, 139 transitions, 2358 flow. Second operand 15 states and 1522 transitions. [2023-08-24 16:00:36,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 463 transitions, 8174 flow [2023-08-24 16:00:37,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 463 transitions, 7398 flow, removed 171 selfloop flow, removed 9 redundant places. [2023-08-24 16:00:37,167 INFO L231 Difference]: Finished difference. Result has 106 places, 327 transitions, 6207 flow [2023-08-24 16:00:37,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=2075, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6207, PETRI_PLACES=106, PETRI_TRANSITIONS=327} [2023-08-24 16:00:37,167 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 68 predicate places. [2023-08-24 16:00:37,168 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 327 transitions, 6207 flow [2023-08-24 16:00:37,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 93.27272727272727) internal successors, (1026), 11 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:37,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:37,168 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] [2023-08-24 16:00:37,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-24 16:00:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:37,369 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:37,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:37,369 INFO L85 PathProgramCache]: Analyzing trace with hash -499644499, now seen corresponding path program 1 times [2023-08-24 16:00:37,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:37,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293621124] [2023-08-24 16:00:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:37,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:37,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:37,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293621124] [2023-08-24 16:00:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293621124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:00:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139717623] [2023-08-24 16:00:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:37,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:37,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:37,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:00:37,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-24 16:00:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:37,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 16:00:37,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:00:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:37,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:00:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:38,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139717623] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:00:38,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:00:38,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 9 [2023-08-24 16:00:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677088976] [2023-08-24 16:00:38,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:00:38,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-24 16:00:38,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:38,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-24 16:00:38,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-24 16:00:38,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:00:38,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 327 transitions, 6207 flow. Second operand has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:38,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:38,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:00:38,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:40,693 INFO L124 PetriNetUnfolderBase]: 16832/22159 cut-off events. [2023-08-24 16:00:40,694 INFO L125 PetriNetUnfolderBase]: For 543089/551406 co-relation queries the response was YES. [2023-08-24 16:00:40,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 190430 conditions, 22159 events. 16832/22159 cut-off events. For 543089/551406 co-relation queries the response was YES. Maximal size of possible extension queue 1040. Compared 112542 event pairs, 1904 based on Foata normal form. 4411/25206 useless extension candidates. Maximal degree in co-relation 178689. Up to 13583 conditions per place. [2023-08-24 16:00:40,979 INFO L140 encePairwiseOnDemand]: 223/230 looper letters, 283 selfloop transitions, 283 changer transitions 3/609 dead transitions. [2023-08-24 16:00:40,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 609 transitions, 12443 flow [2023-08-24 16:00:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:40,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-24 16:00:40,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49826086956521737 [2023-08-24 16:00:40,982 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-24 16:00:40,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-24 16:00:40,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:40,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-24 16:00:40,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:40,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:40,986 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:40,986 INFO L175 Difference]: Start difference. First operand has 106 places, 327 transitions, 6207 flow. Second operand 5 states and 573 transitions. [2023-08-24 16:00:40,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 609 transitions, 12443 flow [2023-08-24 16:00:42,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 609 transitions, 11316 flow, removed 415 selfloop flow, removed 3 redundant places. [2023-08-24 16:00:42,187 INFO L231 Difference]: Finished difference. Result has 109 places, 560 transitions, 11476 flow [2023-08-24 16:00:42,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11476, PETRI_PLACES=109, PETRI_TRANSITIONS=560} [2023-08-24 16:00:42,188 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2023-08-24 16:00:42,188 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 560 transitions, 11476 flow [2023-08-24 16:00:42,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 104.0) internal successors, (1144), 11 states have internal predecessors, (1144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:42,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:42,188 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] [2023-08-24 16:00:42,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-24 16:00:42,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 16:00:42,393 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:42,393 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:42,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1812522751, now seen corresponding path program 2 times [2023-08-24 16:00:42,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:42,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853481270] [2023-08-24 16:00:42,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:42,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:42,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:42,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:42,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853481270] [2023-08-24 16:00:42,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853481270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:00:42,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804586626] [2023-08-24 16:00:42,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 16:00:42,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:42,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:42,656 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:00:42,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-24 16:00:42,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:00:42,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:00:42,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-24 16:00:42,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:00:42,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:42,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:00:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 16:00:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804586626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:00:42,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:00:42,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-24 16:00:42,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787234385] [2023-08-24 16:00:42,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:00:42,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-24 16:00:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:42,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-24 16:00:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-08-24 16:00:42,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 230 [2023-08-24 16:00:42,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 560 transitions, 11476 flow. Second operand has 9 states, 9 states have (on average 114.66666666666667) internal successors, (1032), 9 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:42,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:42,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 230 [2023-08-24 16:00:42,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:00:48,224 INFO L124 PetriNetUnfolderBase]: 31119/40888 cut-off events. [2023-08-24 16:00:48,224 INFO L125 PetriNetUnfolderBase]: For 1161590/1179502 co-relation queries the response was YES. [2023-08-24 16:00:48,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 380242 conditions, 40888 events. 31119/40888 cut-off events. For 1161590/1179502 co-relation queries the response was YES. Maximal size of possible extension queue 1911. Compared 225502 event pairs, 2755 based on Foata normal form. 7568/45716 useless extension candidates. Maximal degree in co-relation 359242. Up to 25674 conditions per place. [2023-08-24 16:00:48,728 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 288 selfloop transitions, 639 changer transitions 3/978 dead transitions. [2023-08-24 16:00:48,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 978 transitions, 21197 flow [2023-08-24 16:00:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-24 16:00:48,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-24 16:00:48,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 634 transitions. [2023-08-24 16:00:48,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551304347826087 [2023-08-24 16:00:48,730 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 634 transitions. [2023-08-24 16:00:48,730 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 634 transitions. [2023-08-24 16:00:48,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:00:48,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 634 transitions. [2023-08-24 16:00:48,732 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:48,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:48,733 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 230.0) internal successors, (1380), 6 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:48,733 INFO L175 Difference]: Start difference. First operand has 109 places, 560 transitions, 11476 flow. Second operand 5 states and 634 transitions. [2023-08-24 16:00:48,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 978 transitions, 21197 flow [2023-08-24 16:00:52,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 978 transitions, 20613 flow, removed 292 selfloop flow, removed 0 redundant places. [2023-08-24 16:00:52,272 INFO L231 Difference]: Finished difference. Result has 115 places, 922 transitions, 20929 flow [2023-08-24 16:00:52,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=10918, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=20929, PETRI_PLACES=115, PETRI_TRANSITIONS=922} [2023-08-24 16:00:52,273 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 77 predicate places. [2023-08-24 16:00:52,273 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 922 transitions, 20929 flow [2023-08-24 16:00:52,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 114.66666666666667) internal successors, (1032), 9 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:52,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:00:52,273 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:00:52,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-24 16:00:52,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 16:00:52,474 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:00:52,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:00:52,475 INFO L85 PathProgramCache]: Analyzing trace with hash 754142469, now seen corresponding path program 3 times [2023-08-24 16:00:52,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:00:52,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875419393] [2023-08-24 16:00:52,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:00:52,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:00:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:00:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:52,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:00:52,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875419393] [2023-08-24 16:00:52,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875419393] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:00:52,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434622222] [2023-08-24 16:00:52,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 16:00:52,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:00:52,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:00:52,639 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:00:52,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-24 16:00:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 16:00:52,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:00:52,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:00:52,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:00:52,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:52,831 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:00:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:00:52,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434622222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:00:52,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:00:52,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-24 16:00:52,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508896446] [2023-08-24 16:00:52,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:00:52,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-24 16:00:52,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:00:52,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-24 16:00:52,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-08-24 16:00:52,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-24 16:00:52,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 922 transitions, 20929 flow. Second operand has 14 states, 14 states have (on average 98.07142857142857) internal successors, (1373), 14 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:00:52,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:00:52,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-24 16:00:52,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:01:12,454 INFO L124 PetriNetUnfolderBase]: 71562/94982 cut-off events. [2023-08-24 16:01:12,454 INFO L125 PetriNetUnfolderBase]: For 2200620/2204961 co-relation queries the response was YES. [2023-08-24 16:01:13,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857140 conditions, 94982 events. 71562/94982 cut-off events. For 2200620/2204961 co-relation queries the response was YES. Maximal size of possible extension queue 3930. Compared 578381 event pairs, 4015 based on Foata normal form. 5420/100356 useless extension candidates. Maximal degree in co-relation 809577. Up to 45362 conditions per place. [2023-08-24 16:01:13,530 INFO L140 encePairwiseOnDemand]: 221/230 looper letters, 3303 selfloop transitions, 1285 changer transitions 0/4609 dead transitions. [2023-08-24 16:01:13,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 4609 transitions, 114532 flow [2023-08-24 16:01:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 16:01:13,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 16:01:13,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 4069 transitions. [2023-08-24 16:01:13,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45362318840579713 [2023-08-24 16:01:13,537 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 4069 transitions. [2023-08-24 16:01:13,537 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 4069 transitions. [2023-08-24 16:01:13,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:01:13,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 4069 transitions. [2023-08-24 16:01:13,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 104.33333333333333) internal successors, (4069), 39 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:01:13,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 230.0) internal successors, (9200), 40 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:01:13,556 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 230.0) internal successors, (9200), 40 states have internal predecessors, (9200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:01:13,556 INFO L175 Difference]: Start difference. First operand has 115 places, 922 transitions, 20929 flow. Second operand 39 states and 4069 transitions. [2023-08-24 16:01:13,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 4609 transitions, 114532 flow [2023-08-24 16:01:29,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 4609 transitions, 108741 flow, removed 2860 selfloop flow, removed 1 redundant places. [2023-08-24 16:01:29,530 INFO L231 Difference]: Finished difference. Result has 185 places, 2074 transitions, 49021 flow [2023-08-24 16:01:29,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=19741, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=922, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=49021, PETRI_PLACES=185, PETRI_TRANSITIONS=2074} [2023-08-24 16:01:29,531 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 147 predicate places. [2023-08-24 16:01:29,531 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 2074 transitions, 49021 flow [2023-08-24 16:01:29,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 98.07142857142857) internal successors, (1373), 14 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:01:29,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:01:29,532 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:01:29,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-24 16:01:29,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 16:01:29,738 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:01:29,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:01:29,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1264238743, now seen corresponding path program 4 times [2023-08-24 16:01:29,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:01:29,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788641811] [2023-08-24 16:01:29,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:01:29,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:01:29,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:01:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:01:29,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:01:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788641811] [2023-08-24 16:01:29,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788641811] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:01:29,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372821613] [2023-08-24 16:01:29,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 16:01:29,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:01:29,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:01:29,933 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:01:29,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-24 16:01:30,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 16:01:30,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:01:30,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:01:30,056 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:01:30,114 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:01:30,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:01:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:01:30,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372821613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:01:30,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:01:30,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-08-24 16:01:30,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17522722] [2023-08-24 16:01:30,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:01:30,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-24 16:01:30,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:01:30,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-24 16:01:30,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-08-24 16:01:30,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 230 [2023-08-24 16:01:30,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 2074 transitions, 49021 flow. Second operand has 12 states, 12 states have (on average 100.25) internal successors, (1203), 12 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:01:30,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:01:30,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 230 [2023-08-24 16:01:30,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:02:02,516 INFO L124 PetriNetUnfolderBase]: 74701/99351 cut-off events. [2023-08-24 16:02:02,516 INFO L125 PetriNetUnfolderBase]: For 4006701/4015715 co-relation queries the response was YES. [2023-08-24 16:02:03,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1076132 conditions, 99351 events. 74701/99351 cut-off events. For 4006701/4015715 co-relation queries the response was YES. Maximal size of possible extension queue 4516. Compared 615268 event pairs, 14486 based on Foata normal form. 5745/102355 useless extension candidates. Maximal degree in co-relation 1061362. Up to 68214 conditions per place. [2023-08-24 16:02:04,198 INFO L140 encePairwiseOnDemand]: 224/230 looper letters, 2044 selfloop transitions, 276 changer transitions 278/2725 dead transitions. [2023-08-24 16:02:04,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 2725 transitions, 70240 flow [2023-08-24 16:02:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-24 16:02:04,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-24 16:02:04,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 894 transitions. [2023-08-24 16:02:04,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48586956521739133 [2023-08-24 16:02:04,200 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 894 transitions. [2023-08-24 16:02:04,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 894 transitions. [2023-08-24 16:02:04,201 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:02:04,201 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 894 transitions. [2023-08-24 16:02:04,203 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 111.75) internal successors, (894), 8 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:02:04,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:02:04,205 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 230.0) internal successors, (2070), 9 states have internal predecessors, (2070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:02:04,205 INFO L175 Difference]: Start difference. First operand has 185 places, 2074 transitions, 49021 flow. Second operand 8 states and 894 transitions. [2023-08-24 16:02:04,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 2725 transitions, 70240 flow [2023-08-24 16:03:02,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 2725 transitions, 67811 flow, removed 1128 selfloop flow, removed 1 redundant places. [2023-08-24 16:03:02,385 INFO L231 Difference]: Finished difference. Result has 195 places, 2087 transitions, 47819 flow [2023-08-24 16:03:02,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=46592, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2074, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1801, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=47819, PETRI_PLACES=195, PETRI_TRANSITIONS=2087} [2023-08-24 16:03:02,387 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 157 predicate places. [2023-08-24 16:03:02,387 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 2087 transitions, 47819 flow [2023-08-24 16:03:02,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 100.25) internal successors, (1203), 12 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:03:02,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:03:02,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:03:02,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-24 16:03:02,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:03:02,588 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:03:02,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:03:02,588 INFO L85 PathProgramCache]: Analyzing trace with hash 56668673, now seen corresponding path program 5 times [2023-08-24 16:03:02,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:03:02,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299823143] [2023-08-24 16:03:02,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:03:02,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:03:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:03:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:03:02,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:03:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299823143] [2023-08-24 16:03:02,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299823143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:03:02,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165481620] [2023-08-24 16:03:02,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 16:03:02,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:03:02,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:03:02,783 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:03:02,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-24 16:03:02,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 16:03:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:03:02,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:03:02,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:03:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:03:02,943 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:03:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:03:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165481620] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:03:03,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:03:03,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-24 16:03:03,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199481112] [2023-08-24 16:03:03,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:03:03,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-24 16:03:03,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:03:03,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-24 16:03:03,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-08-24 16:03:03,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-24 16:03:03,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 2087 transitions, 47819 flow. Second operand has 16 states, 16 states have (on average 95.875) internal successors, (1534), 16 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:03:03,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:03:03,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-24 16:03:03,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:03:53,916 INFO L124 PetriNetUnfolderBase]: 109458/143982 cut-off events. [2023-08-24 16:03:53,916 INFO L125 PetriNetUnfolderBase]: For 5384689/5388255 co-relation queries the response was YES. [2023-08-24 16:03:55,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1568442 conditions, 143982 events. 109458/143982 cut-off events. For 5384689/5388255 co-relation queries the response was YES. Maximal size of possible extension queue 5628. Compared 888299 event pairs, 12056 based on Foata normal form. 2677/146261 useless extension candidates. Maximal degree in co-relation 1549294. Up to 66166 conditions per place. [2023-08-24 16:03:56,512 INFO L140 encePairwiseOnDemand]: 222/230 looper letters, 3120 selfloop transitions, 1539 changer transitions 43/4758 dead transitions. [2023-08-24 16:03:56,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 4758 transitions, 119931 flow [2023-08-24 16:03:56,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-24 16:03:56,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-24 16:03:56,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1990 transitions. [2023-08-24 16:03:56,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45537757437070936 [2023-08-24 16:03:56,515 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1990 transitions. [2023-08-24 16:03:56,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1990 transitions. [2023-08-24 16:03:56,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:03:56,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1990 transitions. [2023-08-24 16:03:56,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 104.73684210526316) internal successors, (1990), 19 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:03:56,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 230.0) internal successors, (4600), 20 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:03:56,523 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 230.0) internal successors, (4600), 20 states have internal predecessors, (4600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:03:56,523 INFO L175 Difference]: Start difference. First operand has 195 places, 2087 transitions, 47819 flow. Second operand 19 states and 1990 transitions. [2023-08-24 16:03:56,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 4758 transitions, 119931 flow [2023-08-24 16:09:08,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 4758 transitions, 118719 flow, removed 25 selfloop flow, removed 3 redundant places. [2023-08-24 16:09:08,683 INFO L231 Difference]: Finished difference. Result has 221 places, 2912 transitions, 73110 flow [2023-08-24 16:09:08,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=230, PETRI_DIFFERENCE_MINUEND_FLOW=47321, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=73110, PETRI_PLACES=221, PETRI_TRANSITIONS=2912} [2023-08-24 16:09:08,685 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 183 predicate places. [2023-08-24 16:09:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 2912 transitions, 73110 flow [2023-08-24 16:09:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 95.875) internal successors, (1534), 16 states have internal predecessors, (1534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:09:08,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 16:09:08,685 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 16:09:08,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-24 16:09:08,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:09:08,890 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-24 16:09:08,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 16:09:08,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1865388063, now seen corresponding path program 6 times [2023-08-24 16:09:08,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 16:09:08,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101635345] [2023-08-24 16:09:08,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 16:09:08,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 16:09:08,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 16:09:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 16:09:09,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 16:09:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101635345] [2023-08-24 16:09:09,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101635345] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 16:09:09,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412823253] [2023-08-24 16:09:09,050 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 16:09:09,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 16:09:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 16:09:09,051 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 16:09:09,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-24 16:09:09,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 16:09:09,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 16:09:09,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-24 16:09:09,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 16:09:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:09:09,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 16:09:09,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 16:09:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412823253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 16:09:09,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 16:09:09,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-24 16:09:09,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284782239] [2023-08-24 16:09:09,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 16:09:09,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-24 16:09:09,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 16:09:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-24 16:09:09,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2023-08-24 16:09:09,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 230 [2023-08-24 16:09:09,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 2912 transitions, 73110 flow. Second operand has 15 states, 15 states have (on average 96.93333333333334) internal successors, (1454), 15 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:09:09,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 16:09:09,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 230 [2023-08-24 16:09:09,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 16:11:07,110 INFO L124 PetriNetUnfolderBase]: 185407/242750 cut-off events. [2023-08-24 16:11:07,110 INFO L125 PetriNetUnfolderBase]: For 11603999/11609452 co-relation queries the response was YES. [2023-08-24 16:11:10,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2872894 conditions, 242750 events. 185407/242750 cut-off events. For 11603999/11609452 co-relation queries the response was YES. Maximal size of possible extension queue 9819. Compared 1568439 event pairs, 10926 based on Foata normal form. 14015/256331 useless extension candidates. Maximal degree in co-relation 2828041. Up to 120225 conditions per place. [2023-08-24 16:11:11,981 INFO L140 encePairwiseOnDemand]: 220/230 looper letters, 5088 selfloop transitions, 5607 changer transitions 316/11067 dead transitions. [2023-08-24 16:11:11,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 11067 transitions, 319042 flow [2023-08-24 16:11:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-24 16:11:11,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-24 16:11:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 8684 transitions. [2023-08-24 16:11:11,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441943734015345 [2023-08-24 16:11:11,990 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 8684 transitions. [2023-08-24 16:11:11,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 8684 transitions. [2023-08-24 16:11:11,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 16:11:11,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 8684 transitions. [2023-08-24 16:11:12,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 102.16470588235295) internal successors, (8684), 85 states have internal predecessors, (8684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:11:12,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 230.0) internal successors, (19780), 86 states have internal predecessors, (19780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:11:12,025 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 230.0) internal successors, (19780), 86 states have internal predecessors, (19780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 16:11:12,025 INFO L175 Difference]: Start difference. First operand has 221 places, 2912 transitions, 73110 flow. Second operand 85 states and 8684 transitions. [2023-08-24 16:11:12,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 11067 transitions, 319042 flow Received shutdown request... [2023-08-24 16:13:46,121 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:13:46,121 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-24 16:13:47,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-24 16:13:47,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown