/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-24 03:19:40,629 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-24 03:19:40,691 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 03:19:40,696 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-24 03:19:40,696 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-24 03:19:40,719 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-24 03:19:40,719 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-24 03:19:40,720 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-24 03:19:40,720 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-24 03:19:40,723 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-24 03:19:40,723 INFO L153 SettingsManager]: * Use SBE=true [2023-08-24 03:19:40,723 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-24 03:19:40,723 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-24 03:19:40,724 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-24 03:19:40,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-24 03:19:40,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-24 03:19:40,724 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-24 03:19:40,725 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-24 03:19:40,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-24 03:19:40,725 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-24 03:19:40,725 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-24 03:19:40,725 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-24 03:19:40,726 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-24 03:19:40,726 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-24 03:19:40,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-24 03:19:40,726 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-24 03:19:40,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-24 03:19:40,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:19:40,727 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-24 03:19:40,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-24 03:19:40,727 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-24 03:19:40,728 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-24 03:19:40,728 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-24 03:19:40,728 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-24 03:19:40,728 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-24 03:19:40,728 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-08-24 03:19:40,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-24 03:19:40,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-24 03:19:40,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-24 03:19:40,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-24 03:19:40,996 INFO L274 PluginConnector]: CDTParser initialized [2023-08-24 03:19:40,997 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-24 03:19:41,911 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-24 03:19:42,093 INFO L384 CDTParser]: Found 1 translation units. [2023-08-24 03:19:42,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-08-24 03:19:42,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8551bf791/b0a4fd93c51b4ad99912b4ea3fbe1f75/FLAGb55b27932 [2023-08-24 03:19:42,111 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8551bf791/b0a4fd93c51b4ad99912b4ea3fbe1f75 [2023-08-24 03:19:42,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-24 03:19:42,116 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-24 03:19:42,118 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-24 03:19:42,118 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-24 03:19:42,120 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-24 03:19:42,121 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,122 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72e78578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42, skipping insertion in model container [2023-08-24 03:19:42,122 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,136 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-24 03:19:42,262 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-24 03:19:42,263 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:19:42,269 INFO L201 MainTranslator]: Completed pre-run [2023-08-24 03:19:42,287 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-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-08-24 03:19:42,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-24 03:19:42,297 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:19:42,297 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-24 03:19:42,301 INFO L206 MainTranslator]: Completed translation [2023-08-24 03:19:42,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42 WrapperNode [2023-08-24 03:19:42,302 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-24 03:19:42,303 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-24 03:19:42,303 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-24 03:19:42,303 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-24 03:19:42,307 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,313 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,329 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-08-24 03:19:42,329 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-24 03:19:42,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-24 03:19:42,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-24 03:19:42,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-24 03:19:42,335 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,343 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,343 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,356 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,357 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-24 03:19:42,358 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-24 03:19:42,358 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-24 03:19:42,358 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-24 03:19:42,359 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (1/1) ... [2023-08-24 03:19:42,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-24 03:19:42,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:42,377 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 03:19:42,378 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 03:19:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-24 03:19:42,404 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-24 03:19:42,404 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-24 03:19:42,405 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-24 03:19:42,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-24 03:19:42,405 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-24 03:19:42,406 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 03:19:42,461 INFO L236 CfgBuilder]: Building ICFG [2023-08-24 03:19:42,462 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-24 03:19:42,569 INFO L277 CfgBuilder]: Performing block encoding [2023-08-24 03:19:42,591 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-24 03:19:42,591 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-24 03:19:42,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:19:42 BoogieIcfgContainer [2023-08-24 03:19:42,593 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-24 03:19:42,594 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-24 03:19:42,594 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-24 03:19:42,596 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-24 03:19:42,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.08 03:19:42" (1/3) ... [2023-08-24 03:19:42,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0b7570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:19:42, skipping insertion in model container [2023-08-24 03:19:42,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.08 03:19:42" (2/3) ... [2023-08-24 03:19:42,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d0b7570 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.08 03:19:42, skipping insertion in model container [2023-08-24 03:19:42,597 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.08 03:19:42" (3/3) ... [2023-08-24 03:19:42,597 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-08-24 03:19:42,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-24 03:19:42,608 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-24 03:19:42,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-24 03:19:42,674 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-24 03:19:42,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 82 transitions, 180 flow [2023-08-24 03:19:42,756 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-08-24 03:19:42,756 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:19:42,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 03:19:42,760 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 82 transitions, 180 flow [2023-08-24 03:19:42,763 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 72 transitions, 156 flow [2023-08-24 03:19:42,766 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-24 03:19:42,774 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-24 03:19:42,777 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 73 places, 72 transitions, 156 flow [2023-08-24 03:19:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 72 transitions, 156 flow [2023-08-24 03:19:42,802 INFO L124 PetriNetUnfolderBase]: 6/72 cut-off events. [2023-08-24 03:19:42,803 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:19:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 72 events. 6/72 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 44 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 50. Up to 2 conditions per place. [2023-08-24 03:19:42,804 INFO L119 LiptonReduction]: Number of co-enabled transitions 436 [2023-08-24 03:19:44,655 INFO L134 LiptonReduction]: Checked pairs total: 494 [2023-08-24 03:19:44,655 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-08-24 03:19:44,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-24 03:19:44,668 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;@116c9bba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-24 03:19:44,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-24 03:19:44,671 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-24 03:19:44,672 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-08-24 03:19:44,672 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-24 03:19:44,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:44,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:44,673 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:44,675 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:44,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1659386574, now seen corresponding path program 1 times [2023-08-24 03:19:44,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:44,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856902500] [2023-08-24 03:19:44,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:44,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:44,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:45,040 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 03:19:45,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:45,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856902500] [2023-08-24 03:19:45,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856902500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-24 03:19:45,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-24 03:19:45,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-24 03:19:45,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417875038] [2023-08-24 03:19:45,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-24 03:19:45,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-24 03:19:45,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:45,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-24 03:19:45,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-24 03:19:45,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:45,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:45,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:45,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:45,114 INFO L124 PetriNetUnfolderBase]: 59/100 cut-off events. [2023-08-24 03:19:45,114 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-24 03:19:45,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 100 events. 59/100 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 243 event pairs, 23 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 165. Up to 78 conditions per place. [2023-08-24 03:19:45,117 INFO L140 encePairwiseOnDemand]: 142/146 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-24 03:19:45,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-08-24 03:19:45,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-24 03:19:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-24 03:19:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 241 transitions. [2023-08-24 03:19:45,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126712328767123 [2023-08-24 03:19:45,129 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 241 transitions. [2023-08-24 03:19:45,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 241 transitions. [2023-08-24 03:19:45,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:45,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 241 transitions. [2023-08-24 03:19:45,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 60.25) internal successors, (241), 4 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,140 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,141 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 241 transitions. [2023-08-24 03:19:45,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-08-24 03:19:45,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-24 03:19:45,145 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-08-24 03:19:45,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-08-24 03:19:45,148 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-08-24 03:19:45,148 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-08-24 03:19:45,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 58.0) internal successors, (232), 4 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:45,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:45,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-24 03:19:45,149 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:45,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:45,150 INFO L85 PathProgramCache]: Analyzing trace with hash -505495899, now seen corresponding path program 1 times [2023-08-24 03:19:45,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:45,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119915010] [2023-08-24 03:19:45,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:45,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:45,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119915010] [2023-08-24 03:19:45,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119915010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:45,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965370069] [2023-08-24 03:19:45,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:45,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:45,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:45,223 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 03:19:45,227 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 03:19:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:45,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-24 03:19:45,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:45,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:45,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:45,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:45,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965370069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:45,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:45,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-08-24 03:19:45,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558430059] [2023-08-24 03:19:45,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:45,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-24 03:19:45,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:45,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-24 03:19:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-24 03:19:45,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 146 [2023-08-24 03:19:45,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 7 states, 7 states have (on average 66.14285714285714) internal successors, (463), 7 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:45,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 146 [2023-08-24 03:19:45,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:45,485 INFO L124 PetriNetUnfolderBase]: 73/133 cut-off events. [2023-08-24 03:19:45,485 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-24 03:19:45,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 133 events. 73/133 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 367 event pairs, 15 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 75. Up to 79 conditions per place. [2023-08-24 03:19:45,486 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 25 selfloop transitions, 7 changer transitions 9/42 dead transitions. [2023-08-24 03:19:45,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 197 flow [2023-08-24 03:19:45,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-24 03:19:45,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-24 03:19:45,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 420 transitions. [2023-08-24 03:19:45,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4794520547945205 [2023-08-24 03:19:45,492 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 420 transitions. [2023-08-24 03:19:45,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 420 transitions. [2023-08-24 03:19:45,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:45,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 420 transitions. [2023-08-24 03:19:45,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 70.0) internal successors, (420), 6 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,495 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 146.0) internal successors, (1022), 7 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,495 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 6 states and 420 transitions. [2023-08-24 03:19:45,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 197 flow [2023-08-24 03:19:45,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 42 transitions, 187 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-24 03:19:45,496 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 98 flow [2023-08-24 03:19:45,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=98, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-24 03:19:45,497 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-24 03:19:45,497 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 98 flow [2023-08-24 03:19:45,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 66.14285714285714) internal successors, (463), 7 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:45,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:45,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:45,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:45,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:45,705 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:45,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:45,705 INFO L85 PathProgramCache]: Analyzing trace with hash -783701409, now seen corresponding path program 1 times [2023-08-24 03:19:45,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:45,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533764070] [2023-08-24 03:19:45,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:45,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:45,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533764070] [2023-08-24 03:19:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533764070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036002443] [2023-08-24 03:19:45,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:45,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:45,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:45,858 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 03:19:45,860 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 03:19:45,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:45,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 03:19:45,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:46,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:46,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036002443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:46,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:46,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-24 03:19:46,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570738831] [2023-08-24 03:19:46,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:46,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-24 03:19:46,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:46,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-24 03:19:46,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-08-24 03:19:46,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:46,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 98 flow. Second operand has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:46,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:46,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:46,558 INFO L124 PetriNetUnfolderBase]: 162/304 cut-off events. [2023-08-24 03:19:46,558 INFO L125 PetriNetUnfolderBase]: For 266/266 co-relation queries the response was YES. [2023-08-24 03:19:46,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 935 conditions, 304 events. 162/304 cut-off events. For 266/266 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1128 event pairs, 15 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 531. Up to 101 conditions per place. [2023-08-24 03:19:46,561 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 45 selfloop transitions, 25 changer transitions 41/111 dead transitions. [2023-08-24 03:19:46,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 111 transitions, 619 flow [2023-08-24 03:19:46,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-24 03:19:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-24 03:19:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1041 transitions. [2023-08-24 03:19:46,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41941982272361 [2023-08-24 03:19:46,564 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1041 transitions. [2023-08-24 03:19:46,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1041 transitions. [2023-08-24 03:19:46,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:46,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1041 transitions. [2023-08-24 03:19:46,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.23529411764706) internal successors, (1041), 17 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:46,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 146.0) internal successors, (2628), 18 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:46,570 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 146.0) internal successors, (2628), 18 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:46,570 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 98 flow. Second operand 17 states and 1041 transitions. [2023-08-24 03:19:46,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 111 transitions, 619 flow [2023-08-24 03:19:46,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 111 transitions, 603 flow, removed 8 selfloop flow, removed 0 redundant places. [2023-08-24 03:19:46,574 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 289 flow [2023-08-24 03:19:46,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=289, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-24 03:19:46,574 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-08-24 03:19:46,574 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 289 flow [2023-08-24 03:19:46,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:46,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:46,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:46,581 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 03:19:46,779 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,SelfDestructingSolverStorable2 [2023-08-24 03:19:46,779 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:46,780 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:46,780 INFO L85 PathProgramCache]: Analyzing trace with hash -760798655, now seen corresponding path program 2 times [2023-08-24 03:19:46,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:46,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136522538] [2023-08-24 03:19:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:46,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136522538] [2023-08-24 03:19:46,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136522538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:46,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062785537] [2023-08-24 03:19:46,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:19:46,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:46,927 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 03:19:46,929 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 03:19:46,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:19:46,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:46,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 03:19:46,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:47,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:47,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:47,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062785537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:47,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:47,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 03:19:47,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529631168] [2023-08-24 03:19:47,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:47,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:19:47,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:47,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:19:47,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:19:47,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:47,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 289 flow. Second operand has 22 states, 22 states have (on average 56.95454545454545) internal successors, (1253), 22 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:47,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:47,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:47,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:48,080 INFO L124 PetriNetUnfolderBase]: 176/354 cut-off events. [2023-08-24 03:19:48,080 INFO L125 PetriNetUnfolderBase]: For 1067/1067 co-relation queries the response was YES. [2023-08-24 03:19:48,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1542 conditions, 354 events. 176/354 cut-off events. For 1067/1067 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1463 event pairs, 14 based on Foata normal form. 2/356 useless extension candidates. Maximal degree in co-relation 1495. Up to 144 conditions per place. [2023-08-24 03:19:48,083 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 62 selfloop transitions, 31 changer transitions 27/120 dead transitions. [2023-08-24 03:19:48,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 120 transitions, 948 flow [2023-08-24 03:19:48,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-24 03:19:48,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-24 03:19:48,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 981 transitions. [2023-08-24 03:19:48,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199486301369863 [2023-08-24 03:19:48,085 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 981 transitions. [2023-08-24 03:19:48,085 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 981 transitions. [2023-08-24 03:19:48,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:48,086 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 981 transitions. [2023-08-24 03:19:48,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 61.3125) internal successors, (981), 16 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:48,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 146.0) internal successors, (2482), 17 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:48,090 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 146.0) internal successors, (2482), 17 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:48,090 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 289 flow. Second operand 16 states and 981 transitions. [2023-08-24 03:19:48,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 120 transitions, 948 flow [2023-08-24 03:19:48,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 120 transitions, 870 flow, removed 35 selfloop flow, removed 6 redundant places. [2023-08-24 03:19:48,096 INFO L231 Difference]: Finished difference. Result has 67 places, 53 transitions, 445 flow [2023-08-24 03:19:48,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=445, PETRI_PLACES=67, PETRI_TRANSITIONS=53} [2023-08-24 03:19:48,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-08-24 03:19:48,096 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 53 transitions, 445 flow [2023-08-24 03:19:48,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.95454545454545) internal successors, (1253), 22 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:48,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:48,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:48,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-24 03:19:48,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:48,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:48,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:48,302 INFO L85 PathProgramCache]: Analyzing trace with hash 310086467, now seen corresponding path program 3 times [2023-08-24 03:19:48,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:48,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756934302] [2023-08-24 03:19:48,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:48,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:48,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:48,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:48,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756934302] [2023-08-24 03:19:48,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756934302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:48,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264991067] [2023-08-24 03:19:48,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:19:48,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:48,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:48,490 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 03:19:48,492 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 03:19:48,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:19:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:48,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 03:19:48,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:48,708 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:49,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264991067] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:49,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:49,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 03:19:49,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333664663] [2023-08-24 03:19:49,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:49,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:19:49,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:19:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:19:49,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:49,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 53 transitions, 445 flow. Second operand has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:49,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:49,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:49,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:49,716 INFO L124 PetriNetUnfolderBase]: 180/370 cut-off events. [2023-08-24 03:19:49,716 INFO L125 PetriNetUnfolderBase]: For 1463/1463 co-relation queries the response was YES. [2023-08-24 03:19:49,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1752 conditions, 370 events. 180/370 cut-off events. For 1463/1463 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1548 event pairs, 16 based on Foata normal form. 1/371 useless extension candidates. Maximal degree in co-relation 1696. Up to 147 conditions per place. [2023-08-24 03:19:49,719 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 68 selfloop transitions, 39 changer transitions 30/137 dead transitions. [2023-08-24 03:19:49,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 137 transitions, 1165 flow [2023-08-24 03:19:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-24 03:19:49,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-24 03:19:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1218 transitions. [2023-08-24 03:19:49,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41712328767123286 [2023-08-24 03:19:49,722 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1218 transitions. [2023-08-24 03:19:49,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1218 transitions. [2023-08-24 03:19:49,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:49,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1218 transitions. [2023-08-24 03:19:49,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 60.9) internal successors, (1218), 20 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:49,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 146.0) internal successors, (3066), 21 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:49,727 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 146.0) internal successors, (3066), 21 states have internal predecessors, (3066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:49,727 INFO L175 Difference]: Start difference. First operand has 67 places, 53 transitions, 445 flow. Second operand 20 states and 1218 transitions. [2023-08-24 03:19:49,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 137 transitions, 1165 flow [2023-08-24 03:19:49,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 137 transitions, 1046 flow, removed 35 selfloop flow, removed 8 redundant places. [2023-08-24 03:19:49,733 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 563 flow [2023-08-24 03:19:49,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=563, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2023-08-24 03:19:49,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-08-24 03:19:49,734 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 563 flow [2023-08-24 03:19:49,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:49,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:49,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:49,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:49,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:49,939 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:49,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:49,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1295742093, now seen corresponding path program 4 times [2023-08-24 03:19:49,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:49,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657334480] [2023-08-24 03:19:49,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:49,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:49,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:50,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657334480] [2023-08-24 03:19:50,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657334480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:50,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943725597] [2023-08-24 03:19:50,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:19:50,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:50,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:50,062 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 03:19:50,064 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 03:19:50,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:19:50,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:50,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-24 03:19:50,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:50,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:50,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943725597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:50,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:50,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-24 03:19:50,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031677611] [2023-08-24 03:19:50,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:50,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-24 03:19:50,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-24 03:19:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-08-24 03:19:50,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:50,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 563 flow. Second operand has 21 states, 21 states have (on average 56.80952380952381) internal successors, (1193), 21 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:50,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:50,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:50,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:50,842 INFO L124 PetriNetUnfolderBase]: 216/426 cut-off events. [2023-08-24 03:19:50,843 INFO L125 PetriNetUnfolderBase]: For 2038/2038 co-relation queries the response was YES. [2023-08-24 03:19:50,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2180 conditions, 426 events. 216/426 cut-off events. For 2038/2038 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1787 event pairs, 31 based on Foata normal form. 1/427 useless extension candidates. Maximal degree in co-relation 2123. Up to 301 conditions per place. [2023-08-24 03:19:50,845 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 72 selfloop transitions, 22 changer transitions 24/118 dead transitions. [2023-08-24 03:19:50,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1121 flow [2023-08-24 03:19:50,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-24 03:19:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-24 03:19:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 905 transitions. [2023-08-24 03:19:50,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132420091324201 [2023-08-24 03:19:50,850 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 905 transitions. [2023-08-24 03:19:50,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 905 transitions. [2023-08-24 03:19:50,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:50,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 905 transitions. [2023-08-24 03:19:50,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 60.333333333333336) internal successors, (905), 15 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:50,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:50,855 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 146.0) internal successors, (2336), 16 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:50,855 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 563 flow. Second operand 15 states and 905 transitions. [2023-08-24 03:19:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1121 flow [2023-08-24 03:19:50,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 118 transitions, 1011 flow, removed 15 selfloop flow, removed 9 redundant places. [2023-08-24 03:19:50,862 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 661 flow [2023-08-24 03:19:50,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=661, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2023-08-24 03:19:50,862 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-24 03:19:50,862 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 661 flow [2023-08-24 03:19:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.80952380952381) internal successors, (1193), 21 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:50,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:50,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:50,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:51,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:51,067 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:51,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:51,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1393729767, now seen corresponding path program 5 times [2023-08-24 03:19:51,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:51,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899028009] [2023-08-24 03:19:51,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:51,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:51,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:51,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899028009] [2023-08-24 03:19:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899028009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:51,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113055605] [2023-08-24 03:19:51,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:19:51,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:51,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:51,183 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 03:19:51,185 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 03:19:51,227 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:19:51,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:51,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 03:19:51,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:51,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:51,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113055605] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:51,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:51,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 03:19:51,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846032013] [2023-08-24 03:19:51,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:51,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:19:51,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:51,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:19:51,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:19:51,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:51,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 661 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:51,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:51,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:51,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:52,166 INFO L124 PetriNetUnfolderBase]: 286/567 cut-off events. [2023-08-24 03:19:52,166 INFO L125 PetriNetUnfolderBase]: For 3754/3754 co-relation queries the response was YES. [2023-08-24 03:19:52,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2936 conditions, 567 events. 286/567 cut-off events. For 3754/3754 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2661 event pairs, 23 based on Foata normal form. 4/571 useless extension candidates. Maximal degree in co-relation 2871. Up to 211 conditions per place. [2023-08-24 03:19:52,171 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 102 selfloop transitions, 59 changer transitions 18/179 dead transitions. [2023-08-24 03:19:52,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 179 transitions, 1691 flow [2023-08-24 03:19:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 03:19:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 03:19:52,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1742 transitions. [2023-08-24 03:19:52,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41143127066603685 [2023-08-24 03:19:52,174 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1742 transitions. [2023-08-24 03:19:52,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1742 transitions. [2023-08-24 03:19:52,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:52,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1742 transitions. [2023-08-24 03:19:52,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.06896551724138) internal successors, (1742), 29 states have internal predecessors, (1742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,182 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,182 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 661 flow. Second operand 29 states and 1742 transitions. [2023-08-24 03:19:52,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 179 transitions, 1691 flow [2023-08-24 03:19:52,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 179 transitions, 1600 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-24 03:19:52,191 INFO L231 Difference]: Finished difference. Result has 116 places, 92 transitions, 1000 flow [2023-08-24 03:19:52,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1000, PETRI_PLACES=116, PETRI_TRANSITIONS=92} [2023-08-24 03:19:52,192 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2023-08-24 03:19:52,192 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 92 transitions, 1000 flow [2023-08-24 03:19:52,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:52,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:52,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:52,201 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 03:19:52,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:52,397 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:52,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:52,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1954626653, now seen corresponding path program 6 times [2023-08-24 03:19:52,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:52,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657280936] [2023-08-24 03:19:52,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:52,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:52,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657280936] [2023-08-24 03:19:52,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657280936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374268529] [2023-08-24 03:19:52,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:19:52,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:52,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:52,534 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 03:19:52,536 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 03:19:52,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:19:52,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:52,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 03:19:52,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:52,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:53,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374268529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:53,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:53,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 03:19:53,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911112563] [2023-08-24 03:19:53,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:53,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:19:53,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:19:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:19:53,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:53,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 92 transitions, 1000 flow. Second operand has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:53,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:53,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:53,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:53,584 INFO L124 PetriNetUnfolderBase]: 277/548 cut-off events. [2023-08-24 03:19:53,585 INFO L125 PetriNetUnfolderBase]: For 4992/4992 co-relation queries the response was YES. [2023-08-24 03:19:53,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3303 conditions, 548 events. 277/548 cut-off events. For 4992/4992 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2527 event pairs, 30 based on Foata normal form. 1/549 useless extension candidates. Maximal degree in co-relation 3205. Up to 465 conditions per place. [2023-08-24 03:19:53,589 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 94 selfloop transitions, 26 changer transitions 9/129 dead transitions. [2023-08-24 03:19:53,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 129 transitions, 1513 flow [2023-08-24 03:19:53,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-24 03:19:53,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-24 03:19:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 774 transitions. [2023-08-24 03:19:53,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077976817702845 [2023-08-24 03:19:53,590 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 774 transitions. [2023-08-24 03:19:53,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 774 transitions. [2023-08-24 03:19:53,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:53,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 774 transitions. [2023-08-24 03:19:53,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 59.53846153846154) internal successors, (774), 13 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:53,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:53,593 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 146.0) internal successors, (2044), 14 states have internal predecessors, (2044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:53,594 INFO L175 Difference]: Start difference. First operand has 116 places, 92 transitions, 1000 flow. Second operand 13 states and 774 transitions. [2023-08-24 03:19:53,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 129 transitions, 1513 flow [2023-08-24 03:19:53,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 129 transitions, 1230 flow, removed 100 selfloop flow, removed 21 redundant places. [2023-08-24 03:19:53,606 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 893 flow [2023-08-24 03:19:53,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=893, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2023-08-24 03:19:53,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 86 predicate places. [2023-08-24 03:19:53,607 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 893 flow [2023-08-24 03:19:53,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:53,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:53,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:53,614 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 03:19:53,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:53,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:53,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:53,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1840605607, now seen corresponding path program 7 times [2023-08-24 03:19:53,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:53,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042934627] [2023-08-24 03:19:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:53,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:53,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:53,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042934627] [2023-08-24 03:19:53,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042934627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:53,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933741687] [2023-08-24 03:19:53,926 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:19:53,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:53,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:53,941 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 03:19:53,942 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 03:19:53,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:53,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 03:19:53,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:54,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:54,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933741687] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:54,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:54,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 03:19:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140931996] [2023-08-24 03:19:54,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:54,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:19:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:19:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:19:54,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:54,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 893 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:54,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:54,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:54,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:54,878 INFO L124 PetriNetUnfolderBase]: 332/634 cut-off events. [2023-08-24 03:19:54,878 INFO L125 PetriNetUnfolderBase]: For 5273/5273 co-relation queries the response was YES. [2023-08-24 03:19:54,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3616 conditions, 634 events. 332/634 cut-off events. For 5273/5273 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2968 event pairs, 21 based on Foata normal form. 2/636 useless extension candidates. Maximal degree in co-relation 3535. Up to 379 conditions per place. [2023-08-24 03:19:54,884 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 117 selfloop transitions, 35 changer transitions 54/206 dead transitions. [2023-08-24 03:19:54,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 206 transitions, 2090 flow [2023-08-24 03:19:54,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-24 03:19:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-24 03:19:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1852 transitions. [2023-08-24 03:19:54,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4091913389306231 [2023-08-24 03:19:54,886 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1852 transitions. [2023-08-24 03:19:54,886 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1852 transitions. [2023-08-24 03:19:54,889 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:54,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1852 transitions. [2023-08-24 03:19:54,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 59.74193548387097) internal successors, (1852), 31 states have internal predecessors, (1852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:54,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 146.0) internal successors, (4672), 32 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:54,896 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 146.0) internal successors, (4672), 32 states have internal predecessors, (4672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:54,896 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 893 flow. Second operand 31 states and 1852 transitions. [2023-08-24 03:19:54,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 206 transitions, 2090 flow [2023-08-24 03:19:54,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 206 transitions, 1990 flow, removed 30 selfloop flow, removed 9 redundant places. [2023-08-24 03:19:54,912 INFO L231 Difference]: Finished difference. Result has 135 places, 107 transitions, 1035 flow [2023-08-24 03:19:54,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1035, PETRI_PLACES=135, PETRI_TRANSITIONS=107} [2023-08-24 03:19:54,913 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2023-08-24 03:19:54,913 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 107 transitions, 1035 flow [2023-08-24 03:19:54,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:54,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:54,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:54,921 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 03:19:55,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-24 03:19:55,120 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:55,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1799859289, now seen corresponding path program 8 times [2023-08-24 03:19:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:55,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38781030] [2023-08-24 03:19:55,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:55,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38781030] [2023-08-24 03:19:55,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38781030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876507869] [2023-08-24 03:19:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:19:55,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:55,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:55,246 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 03:19:55,248 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 03:19:55,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:19:55,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:55,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-24 03:19:55,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:55,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:55,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:55,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876507869] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:55,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:55,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-24 03:19:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922675793] [2023-08-24 03:19:55,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:55,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:19:55,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:55,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:19:55,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:19:55,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:55,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 107 transitions, 1035 flow. Second operand has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:55,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:55,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:55,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:56,053 INFO L124 PetriNetUnfolderBase]: 279/537 cut-off events. [2023-08-24 03:19:56,053 INFO L125 PetriNetUnfolderBase]: For 6487/6487 co-relation queries the response was YES. [2023-08-24 03:19:56,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 537 events. 279/537 cut-off events. For 6487/6487 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2375 event pairs, 22 based on Foata normal form. 1/538 useless extension candidates. Maximal degree in co-relation 3170. Up to 446 conditions per place. [2023-08-24 03:19:56,058 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 108 selfloop transitions, 31 changer transitions 5/144 dead transitions. [2023-08-24 03:19:56,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 144 transitions, 1602 flow [2023-08-24 03:19:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-24 03:19:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-24 03:19:56,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 831 transitions. [2023-08-24 03:19:56,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40655577299412915 [2023-08-24 03:19:56,059 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 831 transitions. [2023-08-24 03:19:56,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 831 transitions. [2023-08-24 03:19:56,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:56,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 831 transitions. [2023-08-24 03:19:56,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 59.357142857142854) internal successors, (831), 14 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:56,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:56,062 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 146.0) internal successors, (2190), 15 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:56,062 INFO L175 Difference]: Start difference. First operand has 135 places, 107 transitions, 1035 flow. Second operand 14 states and 831 transitions. [2023-08-24 03:19:56,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 144 transitions, 1602 flow [2023-08-24 03:19:56,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1316 flow, removed 97 selfloop flow, removed 23 redundant places. [2023-08-24 03:19:56,074 INFO L231 Difference]: Finished difference. Result has 116 places, 114 transitions, 958 flow [2023-08-24 03:19:56,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=958, PETRI_PLACES=116, PETRI_TRANSITIONS=114} [2023-08-24 03:19:56,074 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 96 predicate places. [2023-08-24 03:19:56,075 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 114 transitions, 958 flow [2023-08-24 03:19:56,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.86363636363637) internal successors, (1251), 22 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:56,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:56,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:56,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:56,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-24 03:19:56,279 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:56,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1814966209, now seen corresponding path program 9 times [2023-08-24 03:19:56,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:56,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155333805] [2023-08-24 03:19:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:56,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:56,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:56,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:56,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155333805] [2023-08-24 03:19:56,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155333805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:56,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434085641] [2023-08-24 03:19:56,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:19:56,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:56,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:56,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:19:56,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-24 03:19:56,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-24 03:19:56,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:56,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-24 03:19:56,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:56,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:56,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:19:56,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434085641] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:56,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:56,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-24 03:19:56,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500221344] [2023-08-24 03:19:56,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-24 03:19:56,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:56,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-24 03:19:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-08-24 03:19:56,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:56,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 958 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:56,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:56,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:56,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:57,306 INFO L124 PetriNetUnfolderBase]: 287/560 cut-off events. [2023-08-24 03:19:57,307 INFO L125 PetriNetUnfolderBase]: For 5481/5481 co-relation queries the response was YES. [2023-08-24 03:19:57,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3139 conditions, 560 events. 287/560 cut-off events. For 5481/5481 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2532 event pairs, 19 based on Foata normal form. 4/562 useless extension candidates. Maximal degree in co-relation 3069. Up to 374 conditions per place. [2023-08-24 03:19:57,310 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 118 selfloop transitions, 35 changer transitions 17/170 dead transitions. [2023-08-24 03:19:57,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 170 transitions, 1686 flow [2023-08-24 03:19:57,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 03:19:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 03:19:57,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1428 transitions. [2023-08-24 03:19:57,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4075342465753425 [2023-08-24 03:19:57,312 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1428 transitions. [2023-08-24 03:19:57,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1428 transitions. [2023-08-24 03:19:57,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:57,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1428 transitions. [2023-08-24 03:19:57,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 59.5) internal successors, (1428), 24 states have internal predecessors, (1428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:57,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:57,317 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:57,317 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 958 flow. Second operand 24 states and 1428 transitions. [2023-08-24 03:19:57,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 170 transitions, 1686 flow [2023-08-24 03:19:57,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 170 transitions, 1599 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-08-24 03:19:57,327 INFO L231 Difference]: Finished difference. Result has 134 places, 111 transitions, 979 flow [2023-08-24 03:19:57,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=979, PETRI_PLACES=134, PETRI_TRANSITIONS=111} [2023-08-24 03:19:57,327 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 114 predicate places. [2023-08-24 03:19:57,328 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 111 transitions, 979 flow [2023-08-24 03:19:57,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:57,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:57,337 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:57,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:57,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-24 03:19:57,543 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:57,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash -647147395, now seen corresponding path program 10 times [2023-08-24 03:19:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:57,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360673805] [2023-08-24 03:19:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:57,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:57,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:57,680 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 03:19:57,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360673805] [2023-08-24 03:19:57,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360673805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:57,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653989008] [2023-08-24 03:19:57,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:19:57,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:57,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:57,682 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:19:57,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-24 03:19:57,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:19:57,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:57,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 03:19:57,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:57,843 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 03:19:57,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:58,002 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 03:19:58,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653989008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:58,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:58,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 03:19:58,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101364938] [2023-08-24 03:19:58,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:58,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:19:58,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:58,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:19:58,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-24 03:19:58,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:19:58,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 111 transitions, 979 flow. Second operand has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:58,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:58,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:19:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:19:58,481 INFO L124 PetriNetUnfolderBase]: 341/659 cut-off events. [2023-08-24 03:19:58,481 INFO L125 PetriNetUnfolderBase]: For 7715/7715 co-relation queries the response was YES. [2023-08-24 03:19:58,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4046 conditions, 659 events. 341/659 cut-off events. For 7715/7715 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3128 event pairs, 11 based on Foata normal form. 3/662 useless extension candidates. Maximal degree in co-relation 3956. Up to 345 conditions per place. [2023-08-24 03:19:58,485 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 82 selfloop transitions, 73 changer transitions 44/199 dead transitions. [2023-08-24 03:19:58,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 199 transitions, 2051 flow [2023-08-24 03:19:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-24 03:19:58,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-24 03:19:58,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1446 transitions. [2023-08-24 03:19:58,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126712328767123 [2023-08-24 03:19:58,487 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1446 transitions. [2023-08-24 03:19:58,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1446 transitions. [2023-08-24 03:19:58,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:19:58,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1446 transitions. [2023-08-24 03:19:58,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.25) internal successors, (1446), 24 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:58,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:58,491 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 146.0) internal successors, (3650), 25 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:58,491 INFO L175 Difference]: Start difference. First operand has 134 places, 111 transitions, 979 flow. Second operand 24 states and 1446 transitions. [2023-08-24 03:19:58,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 199 transitions, 2051 flow [2023-08-24 03:19:58,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 199 transitions, 1973 flow, removed 9 selfloop flow, removed 17 redundant places. [2023-08-24 03:19:58,506 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 1218 flow [2023-08-24 03:19:58,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1218, PETRI_PLACES=144, PETRI_TRANSITIONS=121} [2023-08-24 03:19:58,507 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-08-24 03:19:58,507 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 1218 flow [2023-08-24 03:19:58,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:58,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:19:58,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:19:58,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-24 03:19:58,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-24 03:19:58,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:19:58,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:19:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1246269631, now seen corresponding path program 11 times [2023-08-24 03:19:58,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:19:58,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537193212] [2023-08-24 03:19:58,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:19:58,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:19:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:19:58,912 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 03:19:58,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:19:58,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537193212] [2023-08-24 03:19:58,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537193212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:19:58,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849967525] [2023-08-24 03:19:58,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:19:58,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:19:58,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:19:58,914 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:19:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-24 03:19:58,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:19:58,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:19:58,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 03:19:58,995 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:19:59,123 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 03:19:59,123 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:19:59,306 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 03:19:59,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849967525] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:19:59,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:19:59,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2023-08-24 03:19:59,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941101715] [2023-08-24 03:19:59,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:19:59,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 03:19:59,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:19:59,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 03:19:59,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 03:19:59,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 146 [2023-08-24 03:19:59,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 121 transitions, 1218 flow. Second operand has 24 states, 24 states have (on average 51.791666666666664) internal successors, (1243), 24 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:19:59,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:19:59,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 146 [2023-08-24 03:19:59,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:00,016 INFO L124 PetriNetUnfolderBase]: 335/668 cut-off events. [2023-08-24 03:20:00,016 INFO L125 PetriNetUnfolderBase]: For 11877/11877 co-relation queries the response was YES. [2023-08-24 03:20:00,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4521 conditions, 668 events. 335/668 cut-off events. For 11877/11877 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3263 event pairs, 15 based on Foata normal form. 4/672 useless extension candidates. Maximal degree in co-relation 4400. Up to 357 conditions per place. [2023-08-24 03:20:00,021 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 102 selfloop transitions, 90 changer transitions 22/214 dead transitions. [2023-08-24 03:20:00,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 214 transitions, 2379 flow [2023-08-24 03:20:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 03:20:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 03:20:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1538 transitions. [2023-08-24 03:20:00,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37622309197651665 [2023-08-24 03:20:00,023 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1538 transitions. [2023-08-24 03:20:00,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1538 transitions. [2023-08-24 03:20:00,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:00,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1538 transitions. [2023-08-24 03:20:00,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 54.92857142857143) internal successors, (1538), 28 states have internal predecessors, (1538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:00,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:00,028 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:00,028 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 1218 flow. Second operand 28 states and 1538 transitions. [2023-08-24 03:20:00,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 214 transitions, 2379 flow [2023-08-24 03:20:00,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 214 transitions, 1977 flow, removed 130 selfloop flow, removed 19 redundant places. [2023-08-24 03:20:00,044 INFO L231 Difference]: Finished difference. Result has 155 places, 139 transitions, 1478 flow [2023-08-24 03:20:00,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1002, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1478, PETRI_PLACES=155, PETRI_TRANSITIONS=139} [2023-08-24 03:20:00,045 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 135 predicate places. [2023-08-24 03:20:00,045 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 139 transitions, 1478 flow [2023-08-24 03:20:00,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 51.791666666666664) internal successors, (1243), 24 states have internal predecessors, (1243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:00,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:00,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:00,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:00,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-24 03:20:00,249 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:00,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:00,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1231162711, now seen corresponding path program 12 times [2023-08-24 03:20:00,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:00,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330913282] [2023-08-24 03:20:00,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:00,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:00,379 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 03:20:00,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:00,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330913282] [2023-08-24 03:20:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330913282] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:00,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515039442] [2023-08-24 03:20:00,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:20:00,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:00,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:00,381 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:00,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-24 03:20:00,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-24 03:20:00,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:00,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:20:00,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:00,589 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 03:20:00,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:00,928 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 03:20:00,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515039442] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:00,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:00,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 03:20:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946360881] [2023-08-24 03:20:00,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:00,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:00,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:00,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:00,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:00,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:00,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 139 transitions, 1478 flow. Second operand has 25 states, 25 states have (on average 56.84) internal successors, (1421), 25 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:00,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:00,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:00,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:02,600 INFO L124 PetriNetUnfolderBase]: 490/948 cut-off events. [2023-08-24 03:20:02,600 INFO L125 PetriNetUnfolderBase]: For 14190/14190 co-relation queries the response was YES. [2023-08-24 03:20:02,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 948 events. 490/948 cut-off events. For 14190/14190 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4949 event pairs, 34 based on Foata normal form. 3/951 useless extension candidates. Maximal degree in co-relation 6165. Up to 411 conditions per place. [2023-08-24 03:20:02,607 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 127 selfloop transitions, 133 changer transitions 30/290 dead transitions. [2023-08-24 03:20:02,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 290 transitions, 3353 flow [2023-08-24 03:20:02,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-24 03:20:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-24 03:20:02,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1992 transitions. [2023-08-24 03:20:02,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41344956413449563 [2023-08-24 03:20:02,610 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1992 transitions. [2023-08-24 03:20:02,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1992 transitions. [2023-08-24 03:20:02,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:02,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1992 transitions. [2023-08-24 03:20:02,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 60.36363636363637) internal successors, (1992), 33 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:02,615 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 146.0) internal successors, (4964), 34 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:02,615 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 146.0) internal successors, (4964), 34 states have internal predecessors, (4964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:02,615 INFO L175 Difference]: Start difference. First operand has 155 places, 139 transitions, 1478 flow. Second operand 33 states and 1992 transitions. [2023-08-24 03:20:02,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 290 transitions, 3353 flow [2023-08-24 03:20:02,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 290 transitions, 2953 flow, removed 130 selfloop flow, removed 15 redundant places. [2023-08-24 03:20:02,641 INFO L231 Difference]: Finished difference. Result has 174 places, 192 transitions, 2263 flow [2023-08-24 03:20:02,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2263, PETRI_PLACES=174, PETRI_TRANSITIONS=192} [2023-08-24 03:20:02,642 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-08-24 03:20:02,642 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 192 transitions, 2263 flow [2023-08-24 03:20:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.84) internal successors, (1421), 25 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:02,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:02,642 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:02,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:02,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-24 03:20:02,843 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:02,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2063042039, now seen corresponding path program 13 times [2023-08-24 03:20:02,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:02,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438189334] [2023-08-24 03:20:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:02,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:03,003 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 03:20:03,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:03,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438189334] [2023-08-24 03:20:03,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438189334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:03,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971798175] [2023-08-24 03:20:03,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:20:03,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:03,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:03,006 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:03,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-24 03:20:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:03,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 03:20:03,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:03,174 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 03:20:03,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:03,342 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 03:20:03,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971798175] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:03,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:03,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 03:20:03,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398002673] [2023-08-24 03:20:03,342 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:03,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:20:03,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:03,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:20:03,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2023-08-24 03:20:03,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:03,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 192 transitions, 2263 flow. Second operand has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:03,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:03,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:03,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:04,242 INFO L124 PetriNetUnfolderBase]: 601/1140 cut-off events. [2023-08-24 03:20:04,242 INFO L125 PetriNetUnfolderBase]: For 15836/15836 co-relation queries the response was YES. [2023-08-24 03:20:04,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7830 conditions, 1140 events. 601/1140 cut-off events. For 15836/15836 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6210 event pairs, 15 based on Foata normal form. 7/1147 useless extension candidates. Maximal degree in co-relation 7723. Up to 313 conditions per place. [2023-08-24 03:20:04,251 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 123 selfloop transitions, 130 changer transitions 87/340 dead transitions. [2023-08-24 03:20:04,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 340 transitions, 4456 flow [2023-08-24 03:20:04,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-24 03:20:04,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-24 03:20:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2322 transitions. [2023-08-24 03:20:04,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077976817702845 [2023-08-24 03:20:04,255 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2322 transitions. [2023-08-24 03:20:04,255 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2322 transitions. [2023-08-24 03:20:04,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:04,255 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2322 transitions. [2023-08-24 03:20:04,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 59.53846153846154) internal successors, (2322), 39 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:04,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 146.0) internal successors, (5840), 40 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:04,261 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 146.0) internal successors, (5840), 40 states have internal predecessors, (5840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:04,261 INFO L175 Difference]: Start difference. First operand has 174 places, 192 transitions, 2263 flow. Second operand 39 states and 2322 transitions. [2023-08-24 03:20:04,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 340 transitions, 4456 flow [2023-08-24 03:20:04,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 340 transitions, 3744 flow, removed 244 selfloop flow, removed 18 redundant places. [2023-08-24 03:20:04,297 INFO L231 Difference]: Finished difference. Result has 200 places, 185 transitions, 1961 flow [2023-08-24 03:20:04,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=1961, PETRI_PLACES=200, PETRI_TRANSITIONS=185} [2023-08-24 03:20:04,297 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-24 03:20:04,297 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 185 transitions, 1961 flow [2023-08-24 03:20:04,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:04,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:04,298 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:04,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:04,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:04,502 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:04,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:04,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1295557833, now seen corresponding path program 14 times [2023-08-24 03:20:04,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:04,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466066519] [2023-08-24 03:20:04,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:04,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:04,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:04,628 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 03:20:04,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:04,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466066519] [2023-08-24 03:20:04,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466066519] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:04,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757855746] [2023-08-24 03:20:04,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:20:04,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:04,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:04,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-24 03:20:04,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:20:04,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:04,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:20:04,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:04,845 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 03:20:04,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:05,165 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 03:20:05,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757855746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:05,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:05,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 03:20:05,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768260259] [2023-08-24 03:20:05,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:05,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:05,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:05,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 185 transitions, 1961 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:05,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:05,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:05,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:06,465 INFO L124 PetriNetUnfolderBase]: 580/1124 cut-off events. [2023-08-24 03:20:06,465 INFO L125 PetriNetUnfolderBase]: For 20237/20237 co-relation queries the response was YES. [2023-08-24 03:20:06,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7869 conditions, 1124 events. 580/1124 cut-off events. For 20237/20237 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6176 event pairs, 22 based on Foata normal form. 6/1130 useless extension candidates. Maximal degree in co-relation 7695. Up to 500 conditions per place. [2023-08-24 03:20:06,473 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 132 selfloop transitions, 136 changer transitions 53/321 dead transitions. [2023-08-24 03:20:06,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 321 transitions, 4034 flow [2023-08-24 03:20:06,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 03:20:06,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 03:20:06,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2134 transitions. [2023-08-24 03:20:06,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060121765601218 [2023-08-24 03:20:06,475 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2134 transitions. [2023-08-24 03:20:06,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2134 transitions. [2023-08-24 03:20:06,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:06,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2134 transitions. [2023-08-24 03:20:06,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.27777777777778) internal successors, (2134), 36 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:06,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:06,481 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:06,481 INFO L175 Difference]: Start difference. First operand has 200 places, 185 transitions, 1961 flow. Second operand 36 states and 2134 transitions. [2023-08-24 03:20:06,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 321 transitions, 4034 flow [2023-08-24 03:20:06,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 321 transitions, 3312 flow, removed 242 selfloop flow, removed 32 redundant places. [2023-08-24 03:20:06,513 INFO L231 Difference]: Finished difference. Result has 200 places, 219 transitions, 2562 flow [2023-08-24 03:20:06,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1580, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2562, PETRI_PLACES=200, PETRI_TRANSITIONS=219} [2023-08-24 03:20:06,513 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 180 predicate places. [2023-08-24 03:20:06,514 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 219 transitions, 2562 flow [2023-08-24 03:20:06,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:06,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:06,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:06,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:06,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-24 03:20:06,716 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:06,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:06,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1404157479, now seen corresponding path program 15 times [2023-08-24 03:20:06,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:06,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765957932] [2023-08-24 03:20:06,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:06,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:06,854 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:06,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:06,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765957932] [2023-08-24 03:20:06,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765957932] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:06,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238816460] [2023-08-24 03:20:06,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:20:06,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:06,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:06,856 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:06,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-24 03:20:06,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:20:06,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:06,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:20:06,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:07,064 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 03:20:07,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:07,388 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 03:20:07,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238816460] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:07,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:07,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 03:20:07,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735039913] [2023-08-24 03:20:07,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:07,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:07,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:07,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:07,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:07,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:07,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 219 transitions, 2562 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:07,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:07,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:07,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:08,950 INFO L124 PetriNetUnfolderBase]: 562/1114 cut-off events. [2023-08-24 03:20:08,950 INFO L125 PetriNetUnfolderBase]: For 17163/17163 co-relation queries the response was YES. [2023-08-24 03:20:08,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7441 conditions, 1114 events. 562/1114 cut-off events. For 17163/17163 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6223 event pairs, 34 based on Foata normal form. 4/1118 useless extension candidates. Maximal degree in co-relation 7369. Up to 720 conditions per place. [2023-08-24 03:20:08,958 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 176 selfloop transitions, 115 changer transitions 21/312 dead transitions. [2023-08-24 03:20:08,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 312 transitions, 3848 flow [2023-08-24 03:20:08,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 03:20:08,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 03:20:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2133 transitions. [2023-08-24 03:20:08,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4058219178082192 [2023-08-24 03:20:08,961 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2133 transitions. [2023-08-24 03:20:08,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2133 transitions. [2023-08-24 03:20:08,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:08,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2133 transitions. [2023-08-24 03:20:08,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.25) internal successors, (2133), 36 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:08,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:08,966 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:08,966 INFO L175 Difference]: Start difference. First operand has 200 places, 219 transitions, 2562 flow. Second operand 36 states and 2133 transitions. [2023-08-24 03:20:08,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 312 transitions, 3848 flow [2023-08-24 03:20:09,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 312 transitions, 3184 flow, removed 286 selfloop flow, removed 19 redundant places. [2023-08-24 03:20:09,008 INFO L231 Difference]: Finished difference. Result has 212 places, 238 transitions, 2611 flow [2023-08-24 03:20:09,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=2072, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2611, PETRI_PLACES=212, PETRI_TRANSITIONS=238} [2023-08-24 03:20:09,009 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 192 predicate places. [2023-08-24 03:20:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 238 transitions, 2611 flow [2023-08-24 03:20:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:09,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:09,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:09,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:09,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-24 03:20:09,214 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:09,214 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:09,214 INFO L85 PathProgramCache]: Analyzing trace with hash 435494011, now seen corresponding path program 16 times [2023-08-24 03:20:09,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:09,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139624877] [2023-08-24 03:20:09,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:09,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:09,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:09,339 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 03:20:09,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139624877] [2023-08-24 03:20:09,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139624877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:09,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510934944] [2023-08-24 03:20:09,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:20:09,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:09,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:09,340 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:09,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-24 03:20:09,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:20:09,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:09,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 03:20:09,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:09,554 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 03:20:09,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:09,691 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 03:20:09,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510934944] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:09,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:09,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 03:20:09,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787155036] [2023-08-24 03:20:09,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:09,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 03:20:09,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 03:20:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-08-24 03:20:09,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:09,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 238 transitions, 2611 flow. Second operand has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:09,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:09,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:09,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:10,601 INFO L124 PetriNetUnfolderBase]: 677/1393 cut-off events. [2023-08-24 03:20:10,602 INFO L125 PetriNetUnfolderBase]: For 19763/19763 co-relation queries the response was YES. [2023-08-24 03:20:10,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8779 conditions, 1393 events. 677/1393 cut-off events. For 19763/19763 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 8579 event pairs, 37 based on Foata normal form. 6/1399 useless extension candidates. Maximal degree in co-relation 8615. Up to 560 conditions per place. [2023-08-24 03:20:10,611 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 178 selfloop transitions, 174 changer transitions 32/384 dead transitions. [2023-08-24 03:20:10,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 384 transitions, 4674 flow [2023-08-24 03:20:10,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 03:20:10,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 03:20:10,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2081 transitions. [2023-08-24 03:20:10,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4072407045009785 [2023-08-24 03:20:10,614 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2081 transitions. [2023-08-24 03:20:10,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2081 transitions. [2023-08-24 03:20:10,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:10,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2081 transitions. [2023-08-24 03:20:10,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 59.457142857142856) internal successors, (2081), 35 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:10,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:10,620 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:10,620 INFO L175 Difference]: Start difference. First operand has 212 places, 238 transitions, 2611 flow. Second operand 35 states and 2081 transitions. [2023-08-24 03:20:10,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 384 transitions, 4674 flow [2023-08-24 03:20:10,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 384 transitions, 4391 flow, removed 62 selfloop flow, removed 19 redundant places. [2023-08-24 03:20:10,664 INFO L231 Difference]: Finished difference. Result has 233 places, 281 transitions, 3652 flow [2023-08-24 03:20:10,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=2373, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=3652, PETRI_PLACES=233, PETRI_TRANSITIONS=281} [2023-08-24 03:20:10,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 213 predicate places. [2023-08-24 03:20:10,665 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 281 transitions, 3652 flow [2023-08-24 03:20:10,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:10,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:10,665 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:10,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-24 03:20:10,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-24 03:20:10,869 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:10,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:10,870 INFO L85 PathProgramCache]: Analyzing trace with hash 420387091, now seen corresponding path program 17 times [2023-08-24 03:20:10,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:10,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506304706] [2023-08-24 03:20:10,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:10,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:10,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:10,998 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 03:20:10,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:10,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506304706] [2023-08-24 03:20:10,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506304706] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:10,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448602789] [2023-08-24 03:20:10,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:20:10,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:10,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:10,999 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:11,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-24 03:20:11,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:20:11,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:11,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 03:20:11,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:11,170 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 03:20:11,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:11,320 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 03:20:11,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448602789] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:11,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:11,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 03:20:11,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899370229] [2023-08-24 03:20:11,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:11,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:20:11,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:11,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:20:11,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-08-24 03:20:11,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:11,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 281 transitions, 3652 flow. Second operand has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:11,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:11,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:11,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:12,204 INFO L124 PetriNetUnfolderBase]: 726/1476 cut-off events. [2023-08-24 03:20:12,204 INFO L125 PetriNetUnfolderBase]: For 26429/26429 co-relation queries the response was YES. [2023-08-24 03:20:12,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 1476 events. 726/1476 cut-off events. For 26429/26429 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9129 event pairs, 53 based on Foata normal form. 12/1488 useless extension candidates. Maximal degree in co-relation 10166. Up to 550 conditions per place. [2023-08-24 03:20:12,214 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 171 selfloop transitions, 188 changer transitions 28/387 dead transitions. [2023-08-24 03:20:12,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 387 transitions, 5398 flow [2023-08-24 03:20:12,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 03:20:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 03:20:12,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2138 transitions. [2023-08-24 03:20:12,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067732115677321 [2023-08-24 03:20:12,216 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2138 transitions. [2023-08-24 03:20:12,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2138 transitions. [2023-08-24 03:20:12,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:12,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2138 transitions. [2023-08-24 03:20:12,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.388888888888886) internal successors, (2138), 36 states have internal predecessors, (2138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:12,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:12,222 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:12,222 INFO L175 Difference]: Start difference. First operand has 233 places, 281 transitions, 3652 flow. Second operand 36 states and 2138 transitions. [2023-08-24 03:20:12,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 387 transitions, 5398 flow [2023-08-24 03:20:12,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 387 transitions, 4703 flow, removed 310 selfloop flow, removed 16 redundant places. [2023-08-24 03:20:12,301 INFO L231 Difference]: Finished difference. Result has 250 places, 293 transitions, 3800 flow [2023-08-24 03:20:12,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3115, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3800, PETRI_PLACES=250, PETRI_TRANSITIONS=293} [2023-08-24 03:20:12,302 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 230 predicate places. [2023-08-24 03:20:12,302 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 293 transitions, 3800 flow [2023-08-24 03:20:12,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:12,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:12,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:12,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:12,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:12,509 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:12,510 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:12,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1963019265, now seen corresponding path program 18 times [2023-08-24 03:20:12,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:12,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096293946] [2023-08-24 03:20:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:12,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:12,628 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 03:20:12,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096293946] [2023-08-24 03:20:12,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096293946] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:12,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966580113] [2023-08-24 03:20:12,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:20:12,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:12,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:12,629 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:12,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-24 03:20:12,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:20:12,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:12,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:20:12,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:12,846 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 03:20:12,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:13,173 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 03:20:13,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966580113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:13,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:13,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 03:20:13,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704421759] [2023-08-24 03:20:13,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:13,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:13,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:13,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:13,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:13,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:13,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 293 transitions, 3800 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:13,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:13,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:13,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:14,350 INFO L124 PetriNetUnfolderBase]: 720/1454 cut-off events. [2023-08-24 03:20:14,350 INFO L125 PetriNetUnfolderBase]: For 16586/16586 co-relation queries the response was YES. [2023-08-24 03:20:14,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9536 conditions, 1454 events. 720/1454 cut-off events. For 16586/16586 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 8848 event pairs, 44 based on Foata normal form. 4/1458 useless extension candidates. Maximal degree in co-relation 9357. Up to 1217 conditions per place. [2023-08-24 03:20:14,360 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 293 selfloop transitions, 72 changer transitions 25/390 dead transitions. [2023-08-24 03:20:14,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 390 transitions, 5244 flow [2023-08-24 03:20:14,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-24 03:20:14,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-24 03:20:14,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1784 transitions. [2023-08-24 03:20:14,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40730593607305937 [2023-08-24 03:20:14,362 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1784 transitions. [2023-08-24 03:20:14,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1784 transitions. [2023-08-24 03:20:14,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:14,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1784 transitions. [2023-08-24 03:20:14,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.46666666666667) internal successors, (1784), 30 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:14,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 146.0) internal successors, (4526), 31 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:14,367 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 146.0) internal successors, (4526), 31 states have internal predecessors, (4526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:14,367 INFO L175 Difference]: Start difference. First operand has 250 places, 293 transitions, 3800 flow. Second operand 30 states and 1784 transitions. [2023-08-24 03:20:14,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 390 transitions, 5244 flow [2023-08-24 03:20:14,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 390 transitions, 4844 flow, removed 58 selfloop flow, removed 21 redundant places. [2023-08-24 03:20:14,453 INFO L231 Difference]: Finished difference. Result has 265 places, 320 transitions, 4067 flow [2023-08-24 03:20:14,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3404, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4067, PETRI_PLACES=265, PETRI_TRANSITIONS=320} [2023-08-24 03:20:14,454 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-08-24 03:20:14,454 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 320 transitions, 4067 flow [2023-08-24 03:20:14,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:14,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:14,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:14,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:14,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:14,654 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:14,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:14,655 INFO L85 PathProgramCache]: Analyzing trace with hash -123367775, now seen corresponding path program 19 times [2023-08-24 03:20:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:14,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598500855] [2023-08-24 03:20:14,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:14,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:14,782 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 03:20:14,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598500855] [2023-08-24 03:20:14,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598500855] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:14,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100056823] [2023-08-24 03:20:14,783 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:20:14,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:14,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:14,784 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:14,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-24 03:20:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:14,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-24 03:20:14,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:14,940 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 03:20:14,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:15,092 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 03:20:15,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100056823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:15,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:15,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-24 03:20:15,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132580790] [2023-08-24 03:20:15,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:15,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-24 03:20:15,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-24 03:20:15,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-08-24 03:20:15,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:15,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 320 transitions, 4067 flow. Second operand has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:15,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:15,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:15,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:16,260 INFO L124 PetriNetUnfolderBase]: 937/1915 cut-off events. [2023-08-24 03:20:16,260 INFO L125 PetriNetUnfolderBase]: For 22716/22716 co-relation queries the response was YES. [2023-08-24 03:20:16,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12819 conditions, 1915 events. 937/1915 cut-off events. For 22716/22716 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12639 event pairs, 49 based on Foata normal form. 10/1925 useless extension candidates. Maximal degree in co-relation 12680. Up to 1045 conditions per place. [2023-08-24 03:20:16,275 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 309 selfloop transitions, 178 changer transitions 28/515 dead transitions. [2023-08-24 03:20:16,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 515 transitions, 7319 flow [2023-08-24 03:20:16,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-24 03:20:16,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-24 03:20:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2485 transitions. [2023-08-24 03:20:16,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052511415525114 [2023-08-24 03:20:16,279 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2485 transitions. [2023-08-24 03:20:16,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2485 transitions. [2023-08-24 03:20:16,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:16,280 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2485 transitions. [2023-08-24 03:20:16,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 59.166666666666664) internal successors, (2485), 42 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:16,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 146.0) internal successors, (6278), 43 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:16,285 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 146.0) internal successors, (6278), 43 states have internal predecessors, (6278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:16,285 INFO L175 Difference]: Start difference. First operand has 265 places, 320 transitions, 4067 flow. Second operand 42 states and 2485 transitions. [2023-08-24 03:20:16,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 515 transitions, 7319 flow [2023-08-24 03:20:16,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 515 transitions, 6743 flow, removed 260 selfloop flow, removed 13 redundant places. [2023-08-24 03:20:16,373 INFO L231 Difference]: Finished difference. Result has 301 places, 405 transitions, 5574 flow [2023-08-24 03:20:16,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=3758, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5574, PETRI_PLACES=301, PETRI_TRANSITIONS=405} [2023-08-24 03:20:16,374 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 281 predicate places. [2023-08-24 03:20:16,374 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 405 transitions, 5574 flow [2023-08-24 03:20:16,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:16,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:16,374 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:16,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:16,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-24 03:20:16,579 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:16,579 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:16,579 INFO L85 PathProgramCache]: Analyzing trace with hash 736696047, now seen corresponding path program 20 times [2023-08-24 03:20:16,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:16,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894885277] [2023-08-24 03:20:16,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:16,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:16,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:16,712 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 03:20:16,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894885277] [2023-08-24 03:20:16,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894885277] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:16,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647931946] [2023-08-24 03:20:16,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:20:16,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:16,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:16,714 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:16,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-24 03:20:16,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:20:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:16,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:20:16,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:16,920 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 03:20:16,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:17,160 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 03:20:17,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647931946] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:17,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:17,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 03:20:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574928291] [2023-08-24 03:20:17,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:17,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:17,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:17,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:17,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:17,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 405 transitions, 5574 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:17,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:17,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:17,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:17,955 INFO L124 PetriNetUnfolderBase]: 956/1900 cut-off events. [2023-08-24 03:20:17,955 INFO L125 PetriNetUnfolderBase]: For 26711/26711 co-relation queries the response was YES. [2023-08-24 03:20:17,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13488 conditions, 1900 events. 956/1900 cut-off events. For 26711/26711 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 12192 event pairs, 52 based on Foata normal form. 6/1906 useless extension candidates. Maximal degree in co-relation 13343. Up to 1560 conditions per place. [2023-08-24 03:20:17,969 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 349 selfloop transitions, 67 changer transitions 63/479 dead transitions. [2023-08-24 03:20:17,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 479 transitions, 7257 flow [2023-08-24 03:20:17,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 03:20:17,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 03:20:17,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1473 transitions. [2023-08-24 03:20:17,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40356164383561643 [2023-08-24 03:20:17,974 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1473 transitions. [2023-08-24 03:20:17,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1473 transitions. [2023-08-24 03:20:17,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:17,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1473 transitions. [2023-08-24 03:20:17,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.92) internal successors, (1473), 25 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:17,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:17,977 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:17,977 INFO L175 Difference]: Start difference. First operand has 301 places, 405 transitions, 5574 flow. Second operand 25 states and 1473 transitions. [2023-08-24 03:20:17,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 479 transitions, 7257 flow [2023-08-24 03:20:18,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 479 transitions, 6471 flow, removed 343 selfloop flow, removed 22 redundant places. [2023-08-24 03:20:18,097 INFO L231 Difference]: Finished difference. Result has 307 places, 386 transitions, 5054 flow [2023-08-24 03:20:18,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5002, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5054, PETRI_PLACES=307, PETRI_TRANSITIONS=386} [2023-08-24 03:20:18,097 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 287 predicate places. [2023-08-24 03:20:18,097 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 386 transitions, 5054 flow [2023-08-24 03:20:18,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:18,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:18,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:18,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-24 03:20:18,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-24 03:20:18,299 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:18,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1907000821, now seen corresponding path program 21 times [2023-08-24 03:20:18,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:18,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859317953] [2023-08-24 03:20:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:18,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:18,426 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 03:20:18,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859317953] [2023-08-24 03:20:18,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859317953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:18,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052081093] [2023-08-24 03:20:18,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:20:18,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:18,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:18,427 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:18,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-24 03:20:18,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:20:18,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:18,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-24 03:20:18,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:18,662 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 03:20:18,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:18,947 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 03:20:18,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052081093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:18,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:18,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 23 [2023-08-24 03:20:18,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123650243] [2023-08-24 03:20:18,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:18,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:18,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:18,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:18,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:18,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:18,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 386 transitions, 5054 flow. Second operand has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:18,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:18,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:18,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:20,159 INFO L124 PetriNetUnfolderBase]: 917/1823 cut-off events. [2023-08-24 03:20:20,159 INFO L125 PetriNetUnfolderBase]: For 22331/22331 co-relation queries the response was YES. [2023-08-24 03:20:20,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12381 conditions, 1823 events. 917/1823 cut-off events. For 22331/22331 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 11606 event pairs, 56 based on Foata normal form. 4/1825 useless extension candidates. Maximal degree in co-relation 12253. Up to 1590 conditions per place. [2023-08-24 03:20:20,174 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 373 selfloop transitions, 65 changer transitions 25/463 dead transitions. [2023-08-24 03:20:20,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 463 transitions, 6572 flow [2023-08-24 03:20:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 03:20:20,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 03:20:20,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1487 transitions. [2023-08-24 03:20:20,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073972602739726 [2023-08-24 03:20:20,178 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1487 transitions. [2023-08-24 03:20:20,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1487 transitions. [2023-08-24 03:20:20,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:20,178 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1487 transitions. [2023-08-24 03:20:20,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 59.48) internal successors, (1487), 25 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:20,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:20,181 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:20,181 INFO L175 Difference]: Start difference. First operand has 307 places, 386 transitions, 5054 flow. Second operand 25 states and 1487 transitions. [2023-08-24 03:20:20,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 463 transitions, 6572 flow [2023-08-24 03:20:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 463 transitions, 6319 flow, removed 71 selfloop flow, removed 26 redundant places. [2023-08-24 03:20:20,274 INFO L231 Difference]: Finished difference. Result has 301 places, 405 transitions, 5402 flow [2023-08-24 03:20:20,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=4815, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5402, PETRI_PLACES=301, PETRI_TRANSITIONS=405} [2023-08-24 03:20:20,274 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 281 predicate places. [2023-08-24 03:20:20,274 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 405 transitions, 5402 flow [2023-08-24 03:20:20,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.76) internal successors, (1419), 25 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:20,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:20,275 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:20,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:20,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:20,477 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:20,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:20,477 INFO L85 PathProgramCache]: Analyzing trace with hash -548314985, now seen corresponding path program 22 times [2023-08-24 03:20:20,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:20,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310129175] [2023-08-24 03:20:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:20,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:20,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:20,590 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 03:20:20,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310129175] [2023-08-24 03:20:20,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310129175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:20,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865458200] [2023-08-24 03:20:20,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:20:20,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:20,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:20,592 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:20,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-24 03:20:20,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:20:20,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:20,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 03:20:20,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:20,818 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 03:20:20,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:20,976 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 03:20:20,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865458200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:20,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:20,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2023-08-24 03:20:20,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612570374] [2023-08-24 03:20:20,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:20,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-24 03:20:20,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:20,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-24 03:20:20,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-08-24 03:20:20,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:20,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 405 transitions, 5402 flow. Second operand has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:20,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:20,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:20,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:22,114 INFO L124 PetriNetUnfolderBase]: 1018/2060 cut-off events. [2023-08-24 03:20:22,114 INFO L125 PetriNetUnfolderBase]: For 30755/30755 co-relation queries the response was YES. [2023-08-24 03:20:22,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14286 conditions, 2060 events. 1018/2060 cut-off events. For 30755/30755 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 13733 event pairs, 47 based on Foata normal form. 8/2066 useless extension candidates. Maximal degree in co-relation 14137. Up to 1499 conditions per place. [2023-08-24 03:20:22,145 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 392 selfloop transitions, 114 changer transitions 31/537 dead transitions. [2023-08-24 03:20:22,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 537 transitions, 7912 flow [2023-08-24 03:20:22,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-24 03:20:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-24 03:20:22,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2080 transitions. [2023-08-24 03:20:22,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4070450097847358 [2023-08-24 03:20:22,147 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2080 transitions. [2023-08-24 03:20:22,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2080 transitions. [2023-08-24 03:20:22,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:22,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2080 transitions. [2023-08-24 03:20:22,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 59.42857142857143) internal successors, (2080), 35 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:22,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:22,152 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 146.0) internal successors, (5256), 36 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:22,152 INFO L175 Difference]: Start difference. First operand has 301 places, 405 transitions, 5402 flow. Second operand 35 states and 2080 transitions. [2023-08-24 03:20:22,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 537 transitions, 7912 flow [2023-08-24 03:20:22,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 537 transitions, 7487 flow, removed 181 selfloop flow, removed 12 redundant places. [2023-08-24 03:20:22,263 INFO L231 Difference]: Finished difference. Result has 328 places, 447 transitions, 6284 flow [2023-08-24 03:20:22,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=6284, PETRI_PLACES=328, PETRI_TRANSITIONS=447} [2023-08-24 03:20:22,264 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 308 predicate places. [2023-08-24 03:20:22,264 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 447 transitions, 6284 flow [2023-08-24 03:20:22,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.625) internal successors, (1359), 24 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:22,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:22,264 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:22,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:22,468 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:22,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash 311748837, now seen corresponding path program 23 times [2023-08-24 03:20:22,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:22,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592430318] [2023-08-24 03:20:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:22,570 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 03:20:22,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:22,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592430318] [2023-08-24 03:20:22,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592430318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:22,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617712203] [2023-08-24 03:20:22,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:20:22,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:22,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:22,571 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:22,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-24 03:20:22,624 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:20:22,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:22,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-24 03:20:22,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:22,777 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 03:20:22,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:22,912 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 03:20:22,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617712203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:22,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:22,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-08-24 03:20:22,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970520126] [2023-08-24 03:20:22,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:22,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-24 03:20:22,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:22,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-24 03:20:22,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2023-08-24 03:20:22,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:22,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 447 transitions, 6284 flow. Second operand has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:22,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:22,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:22,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:23,605 INFO L124 PetriNetUnfolderBase]: 1015/2008 cut-off events. [2023-08-24 03:20:23,606 INFO L125 PetriNetUnfolderBase]: For 32636/32636 co-relation queries the response was YES. [2023-08-24 03:20:23,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14351 conditions, 2008 events. 1015/2008 cut-off events. For 32636/32636 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 12992 event pairs, 55 based on Foata normal form. 7/2013 useless extension candidates. Maximal degree in co-relation 14196. Up to 1607 conditions per place. [2023-08-24 03:20:23,623 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 378 selfloop transitions, 71 changer transitions 62/511 dead transitions. [2023-08-24 03:20:23,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 511 transitions, 7945 flow [2023-08-24 03:20:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-24 03:20:23,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-24 03:20:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1297 transitions. [2023-08-24 03:20:23,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40379825653798257 [2023-08-24 03:20:23,625 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1297 transitions. [2023-08-24 03:20:23,625 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1297 transitions. [2023-08-24 03:20:23,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:23,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1297 transitions. [2023-08-24 03:20:23,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 58.95454545454545) internal successors, (1297), 22 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:23,627 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 146.0) internal successors, (3358), 23 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:23,628 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 146.0) internal successors, (3358), 23 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:23,628 INFO L175 Difference]: Start difference. First operand has 328 places, 447 transitions, 6284 flow. Second operand 22 states and 1297 transitions. [2023-08-24 03:20:23,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 511 transitions, 7945 flow [2023-08-24 03:20:23,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 511 transitions, 6872 flow, removed 496 selfloop flow, removed 17 redundant places. [2023-08-24 03:20:23,759 INFO L231 Difference]: Finished difference. Result has 334 places, 421 transitions, 5422 flow [2023-08-24 03:20:23,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=5422, PETRI_PLACES=334, PETRI_TRANSITIONS=421} [2023-08-24 03:20:23,759 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 314 predicate places. [2023-08-24 03:20:23,759 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 421 transitions, 5422 flow [2023-08-24 03:20:23,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.69565217391305) internal successors, (1304), 23 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:23,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:23,760 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:23,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-24 03:20:23,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-24 03:20:23,960 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:23,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -908074734, now seen corresponding path program 24 times [2023-08-24 03:20:23,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:23,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325163802] [2023-08-24 03:20:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:23,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:24,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:24,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325163802] [2023-08-24 03:20:24,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325163802] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:24,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801262411] [2023-08-24 03:20:24,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:20:24,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:24,093 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:24,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-24 03:20:24,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:20:24,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:24,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 03:20:24,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:24,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:24,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:24,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:24,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801262411] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:24,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:24,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 03:20:24,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738071774] [2023-08-24 03:20:24,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:24,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:20:24,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:20:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2023-08-24 03:20:24,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:24,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 421 transitions, 5422 flow. Second operand has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:24,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:24,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:24,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:25,183 INFO L124 PetriNetUnfolderBase]: 987/1931 cut-off events. [2023-08-24 03:20:25,183 INFO L125 PetriNetUnfolderBase]: For 25340/25340 co-relation queries the response was YES. [2023-08-24 03:20:25,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13130 conditions, 1931 events. 987/1931 cut-off events. For 25340/25340 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 12231 event pairs, 49 based on Foata normal form. 6/1935 useless extension candidates. Maximal degree in co-relation 12974. Up to 1208 conditions per place. [2023-08-24 03:20:25,201 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 309 selfloop transitions, 175 changer transitions 26/510 dead transitions. [2023-08-24 03:20:25,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 510 transitions, 7308 flow [2023-08-24 03:20:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-24 03:20:25,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-24 03:20:25,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1500 transitions. [2023-08-24 03:20:25,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.410958904109589 [2023-08-24 03:20:25,202 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1500 transitions. [2023-08-24 03:20:25,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1500 transitions. [2023-08-24 03:20:25,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:25,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1500 transitions. [2023-08-24 03:20:25,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 60.0) internal successors, (1500), 25 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:25,205 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:25,206 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 146.0) internal successors, (3796), 26 states have internal predecessors, (3796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:25,206 INFO L175 Difference]: Start difference. First operand has 334 places, 421 transitions, 5422 flow. Second operand 25 states and 1500 transitions. [2023-08-24 03:20:25,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 510 transitions, 7308 flow [2023-08-24 03:20:25,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 510 transitions, 7078 flow, removed 57 selfloop flow, removed 23 redundant places. [2023-08-24 03:20:25,310 INFO L231 Difference]: Finished difference. Result has 330 places, 431 transitions, 5855 flow [2023-08-24 03:20:25,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5212, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=5855, PETRI_PLACES=330, PETRI_TRANSITIONS=431} [2023-08-24 03:20:25,311 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 310 predicate places. [2023-08-24 03:20:25,311 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 431 transitions, 5855 flow [2023-08-24 03:20:25,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:25,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:25,311 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:25,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-24 03:20:25,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-24 03:20:25,515 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:25,515 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash -389311164, now seen corresponding path program 25 times [2023-08-24 03:20:25,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:25,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470501945] [2023-08-24 03:20:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:25,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:25,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:25,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470501945] [2023-08-24 03:20:25,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470501945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:25,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046846336] [2023-08-24 03:20:25,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:20:25,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:25,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:25,665 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:25,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-24 03:20:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:25,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 03:20:25,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:25,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:26,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046846336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:26,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:26,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 03:20:26,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595913373] [2023-08-24 03:20:26,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:26,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:20:26,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:26,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:20:26,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2023-08-24 03:20:26,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:26,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 431 transitions, 5855 flow. Second operand has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:26,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:26,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:26,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:26,880 INFO L124 PetriNetUnfolderBase]: 1111/2160 cut-off events. [2023-08-24 03:20:26,881 INFO L125 PetriNetUnfolderBase]: For 38343/38343 co-relation queries the response was YES. [2023-08-24 03:20:26,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16034 conditions, 2160 events. 1111/2160 cut-off events. For 38343/38343 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 13940 event pairs, 47 based on Foata normal form. 6/2164 useless extension candidates. Maximal degree in co-relation 15878. Up to 1091 conditions per place. [2023-08-24 03:20:26,900 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 327 selfloop transitions, 219 changer transitions 23/569 dead transitions. [2023-08-24 03:20:26,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 569 transitions, 8718 flow [2023-08-24 03:20:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 03:20:26,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 03:20:26,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1677 transitions. [2023-08-24 03:20:26,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41022504892367906 [2023-08-24 03:20:26,902 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1677 transitions. [2023-08-24 03:20:26,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1677 transitions. [2023-08-24 03:20:26,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:26,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1677 transitions. [2023-08-24 03:20:26,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 59.892857142857146) internal successors, (1677), 28 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:26,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:26,905 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:26,905 INFO L175 Difference]: Start difference. First operand has 330 places, 431 transitions, 5855 flow. Second operand 28 states and 1677 transitions. [2023-08-24 03:20:26,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 569 transitions, 8718 flow [2023-08-24 03:20:27,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 569 transitions, 8307 flow, removed 88 selfloop flow, removed 25 redundant places. [2023-08-24 03:20:27,046 INFO L231 Difference]: Finished difference. Result has 337 places, 478 transitions, 7163 flow [2023-08-24 03:20:27,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=7163, PETRI_PLACES=337, PETRI_TRANSITIONS=478} [2023-08-24 03:20:27,046 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 317 predicate places. [2023-08-24 03:20:27,046 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 478 transitions, 7163 flow [2023-08-24 03:20:27,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:27,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:27,047 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:27,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-24 03:20:27,247 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:27,247 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:27,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1273748123, now seen corresponding path program 26 times [2023-08-24 03:20:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:27,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098311336] [2023-08-24 03:20:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:27,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:27,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098311336] [2023-08-24 03:20:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098311336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443894339] [2023-08-24 03:20:27,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:20:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:27,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:27,398 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:27,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-24 03:20:27,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:20:27,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:27,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 03:20:27,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:27,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:27,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:27,770 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:27,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443894339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:27,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:27,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-08-24 03:20:27,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912158381] [2023-08-24 03:20:27,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:27,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-24 03:20:27,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:27,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-24 03:20:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2023-08-24 03:20:27,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:27,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 478 transitions, 7163 flow. Second operand has 26 states, 26 states have (on average 56.65384615384615) internal successors, (1473), 26 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:27,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:27,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:29,195 INFO L124 PetriNetUnfolderBase]: 1531/2968 cut-off events. [2023-08-24 03:20:29,195 INFO L125 PetriNetUnfolderBase]: For 78519/78519 co-relation queries the response was YES. [2023-08-24 03:20:29,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24711 conditions, 2968 events. 1531/2968 cut-off events. For 78519/78519 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 20379 event pairs, 40 based on Foata normal form. 18/2980 useless extension candidates. Maximal degree in co-relation 24562. Up to 924 conditions per place. [2023-08-24 03:20:29,222 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 355 selfloop transitions, 345 changer transitions 28/728 dead transitions. [2023-08-24 03:20:29,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 728 transitions, 12306 flow [2023-08-24 03:20:29,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-24 03:20:29,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-24 03:20:29,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2373 transitions. [2023-08-24 03:20:29,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40633561643835614 [2023-08-24 03:20:29,224 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2373 transitions. [2023-08-24 03:20:29,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2373 transitions. [2023-08-24 03:20:29,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:29,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2373 transitions. [2023-08-24 03:20:29,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 59.325) internal successors, (2373), 40 states have internal predecessors, (2373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:29,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 146.0) internal successors, (5986), 41 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:29,229 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 146.0) internal successors, (5986), 41 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:29,229 INFO L175 Difference]: Start difference. First operand has 337 places, 478 transitions, 7163 flow. Second operand 40 states and 2373 transitions. [2023-08-24 03:20:29,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 728 transitions, 12306 flow [2023-08-24 03:20:29,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 728 transitions, 11256 flow, removed 439 selfloop flow, removed 17 redundant places. [2023-08-24 03:20:29,499 INFO L231 Difference]: Finished difference. Result has 360 places, 579 transitions, 9228 flow [2023-08-24 03:20:29,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=6608, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=260, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=9228, PETRI_PLACES=360, PETRI_TRANSITIONS=579} [2023-08-24 03:20:29,500 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 340 predicate places. [2023-08-24 03:20:29,500 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 579 transitions, 9228 flow [2023-08-24 03:20:29,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.65384615384615) internal successors, (1473), 26 states have internal predecessors, (1473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:29,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:29,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:29,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:29,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-24 03:20:29,704 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:29,704 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:29,704 INFO L85 PathProgramCache]: Analyzing trace with hash 805310178, now seen corresponding path program 27 times [2023-08-24 03:20:29,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:29,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49558536] [2023-08-24 03:20:29,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:29,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:29,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49558536] [2023-08-24 03:20:29,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49558536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:29,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875559269] [2023-08-24 03:20:29,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:20:29,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:29,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:29,859 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:29,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-24 03:20:29,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:20:29,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:29,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 03:20:29,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:30,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:30,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875559269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:30,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:30,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 23 [2023-08-24 03:20:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548532508] [2023-08-24 03:20:30,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:30,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:30,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 579 transitions, 9228 flow. Second operand has 25 states, 25 states have (on average 56.64) internal successors, (1416), 25 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:30,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:30,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:30,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:31,691 INFO L124 PetriNetUnfolderBase]: 1670/3197 cut-off events. [2023-08-24 03:20:31,692 INFO L125 PetriNetUnfolderBase]: For 89477/89477 co-relation queries the response was YES. [2023-08-24 03:20:31,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28246 conditions, 3197 events. 1670/3197 cut-off events. For 89477/89477 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 21876 event pairs, 36 based on Foata normal form. 20/3217 useless extension candidates. Maximal degree in co-relation 28023. Up to 957 conditions per place. [2023-08-24 03:20:31,720 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 304 selfloop transitions, 448 changer transitions 45/797 dead transitions. [2023-08-24 03:20:31,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 797 transitions, 14235 flow [2023-08-24 03:20:31,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-24 03:20:31,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-24 03:20:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2139 transitions. [2023-08-24 03:20:31,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069634703196347 [2023-08-24 03:20:31,723 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2139 transitions. [2023-08-24 03:20:31,723 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2139 transitions. [2023-08-24 03:20:31,723 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:31,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2139 transitions. [2023-08-24 03:20:31,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 59.416666666666664) internal successors, (2139), 36 states have internal predecessors, (2139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:31,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:31,727 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 146.0) internal successors, (5402), 37 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:31,727 INFO L175 Difference]: Start difference. First operand has 360 places, 579 transitions, 9228 flow. Second operand 36 states and 2139 transitions. [2023-08-24 03:20:31,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 797 transitions, 14235 flow [2023-08-24 03:20:32,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 797 transitions, 13260 flow, removed 368 selfloop flow, removed 30 redundant places. [2023-08-24 03:20:32,048 INFO L231 Difference]: Finished difference. Result has 369 places, 665 transitions, 11713 flow [2023-08-24 03:20:32,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=11713, PETRI_PLACES=369, PETRI_TRANSITIONS=665} [2023-08-24 03:20:32,049 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-08-24 03:20:32,049 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 665 transitions, 11713 flow [2023-08-24 03:20:32,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.64) internal successors, (1416), 25 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:32,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:32,049 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:32,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-24 03:20:32,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-24 03:20:32,251 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:32,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1283601315, now seen corresponding path program 28 times [2023-08-24 03:20:32,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:32,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086336608] [2023-08-24 03:20:32,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:32,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:32,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086336608] [2023-08-24 03:20:32,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086336608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:32,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575112174] [2023-08-24 03:20:32,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:20:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:32,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:32,404 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:32,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-24 03:20:32,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:20:32,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:32,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 03:20:32,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:32,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:32,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575112174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:32,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:32,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 03:20:32,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18609714] [2023-08-24 03:20:32,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:32,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:32,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:32,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:32,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:32,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 665 transitions, 11713 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:32,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:32,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:32,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:34,855 INFO L124 PetriNetUnfolderBase]: 2178/3989 cut-off events. [2023-08-24 03:20:34,856 INFO L125 PetriNetUnfolderBase]: For 137265/137265 co-relation queries the response was YES. [2023-08-24 03:20:34,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39566 conditions, 3989 events. 2178/3989 cut-off events. For 137265/137265 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 27274 event pairs, 55 based on Foata normal form. 14/4003 useless extension candidates. Maximal degree in co-relation 39338. Up to 1871 conditions per place. [2023-08-24 03:20:34,893 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 528 selfloop transitions, 462 changer transitions 25/1015 dead transitions. [2023-08-24 03:20:34,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1015 transitions, 20726 flow [2023-08-24 03:20:34,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 03:20:34,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 03:20:34,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3358 transitions. [2023-08-24 03:20:34,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2023-08-24 03:20:34,896 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3358 transitions. [2023-08-24 03:20:34,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3358 transitions. [2023-08-24 03:20:34,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:34,896 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3358 transitions. [2023-08-24 03:20:34,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 58.91228070175438) internal successors, (3358), 57 states have internal predecessors, (3358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:34,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:34,902 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:34,903 INFO L175 Difference]: Start difference. First operand has 369 places, 665 transitions, 11713 flow. Second operand 57 states and 3358 transitions. [2023-08-24 03:20:34,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1015 transitions, 20726 flow [2023-08-24 03:20:35,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1015 transitions, 18020 flow, removed 1197 selfloop flow, removed 25 redundant places. [2023-08-24 03:20:35,537 INFO L231 Difference]: Finished difference. Result has 405 places, 871 transitions, 16178 flow [2023-08-24 03:20:35,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=10381, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=288, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=16178, PETRI_PLACES=405, PETRI_TRANSITIONS=871} [2023-08-24 03:20:35,538 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2023-08-24 03:20:35,538 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 871 transitions, 16178 flow [2023-08-24 03:20:35,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:35,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:35,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:35,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:35,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:35,740 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:35,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:35,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1572062937, now seen corresponding path program 29 times [2023-08-24 03:20:35,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:35,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510337695] [2023-08-24 03:20:35,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:35,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:35,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:35,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510337695] [2023-08-24 03:20:35,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510337695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:35,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478906960] [2023-08-24 03:20:35,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:20:35,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:35,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:35,893 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:35,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-24 03:20:35,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-24 03:20:35,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:35,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-24 03:20:35,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:36,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:36,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:36,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:36,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478906960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:36,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:36,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 03:20:36,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230504157] [2023-08-24 03:20:36,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:36,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:36,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:36,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:36,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:36,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:36,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 871 transitions, 16178 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:36,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:36,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:36,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:38,221 INFO L124 PetriNetUnfolderBase]: 2271/4104 cut-off events. [2023-08-24 03:20:38,222 INFO L125 PetriNetUnfolderBase]: For 126196/126196 co-relation queries the response was YES. [2023-08-24 03:20:38,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39088 conditions, 4104 events. 2271/4104 cut-off events. For 126196/126196 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 27758 event pairs, 44 based on Foata normal form. 6/4110 useless extension candidates. Maximal degree in co-relation 38861. Up to 3463 conditions per place. [2023-08-24 03:20:38,262 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 847 selfloop transitions, 141 changer transitions 24/1012 dead transitions. [2023-08-24 03:20:38,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 1012 transitions, 19898 flow [2023-08-24 03:20:38,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 03:20:38,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 03:20:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2245 transitions. [2023-08-24 03:20:38,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046503244412401 [2023-08-24 03:20:38,264 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2245 transitions. [2023-08-24 03:20:38,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2245 transitions. [2023-08-24 03:20:38,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:38,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2245 transitions. [2023-08-24 03:20:38,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.078947368421055) internal successors, (2245), 38 states have internal predecessors, (2245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:38,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:38,268 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:38,268 INFO L175 Difference]: Start difference. First operand has 405 places, 871 transitions, 16178 flow. Second operand 38 states and 2245 transitions. [2023-08-24 03:20:38,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 1012 transitions, 19898 flow [2023-08-24 03:20:39,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1012 transitions, 18308 flow, removed 734 selfloop flow, removed 26 redundant places. [2023-08-24 03:20:39,053 INFO L231 Difference]: Finished difference. Result has 419 places, 926 transitions, 16071 flow [2023-08-24 03:20:39,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=14648, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=871, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=16071, PETRI_PLACES=419, PETRI_TRANSITIONS=926} [2023-08-24 03:20:39,054 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 399 predicate places. [2023-08-24 03:20:39,054 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 926 transitions, 16071 flow [2023-08-24 03:20:39,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:39,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:39,055 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:39,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:39,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-24 03:20:39,259 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:39,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:39,259 INFO L85 PathProgramCache]: Analyzing trace with hash -822618968, now seen corresponding path program 30 times [2023-08-24 03:20:39,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:39,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655447161] [2023-08-24 03:20:39,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:39,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:39,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:39,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655447161] [2023-08-24 03:20:39,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655447161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:39,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763632] [2023-08-24 03:20:39,393 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:20:39,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:39,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:39,394 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:39,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-24 03:20:39,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-24 03:20:39,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:39,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-24 03:20:39,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:39,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:39,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:39,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:39,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:39,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:39,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-08-24 03:20:39,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567097992] [2023-08-24 03:20:39,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:39,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-24 03:20:39,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:39,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-24 03:20:39,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2023-08-24 03:20:39,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:39,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 926 transitions, 16071 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:39,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:39,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:39,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:41,674 INFO L124 PetriNetUnfolderBase]: 2481/4457 cut-off events. [2023-08-24 03:20:41,674 INFO L125 PetriNetUnfolderBase]: For 135643/135643 co-relation queries the response was YES. [2023-08-24 03:20:41,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42424 conditions, 4457 events. 2481/4457 cut-off events. For 135643/135643 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 30286 event pairs, 49 based on Foata normal form. 7/4464 useless extension candidates. Maximal degree in co-relation 42190. Up to 3554 conditions per place. [2023-08-24 03:20:41,722 INFO L140 encePairwiseOnDemand]: 137/146 looper letters, 893 selfloop transitions, 189 changer transitions 26/1108 dead transitions. [2023-08-24 03:20:41,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 1108 transitions, 22286 flow [2023-08-24 03:20:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-24 03:20:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-24 03:20:41,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 1675 transitions. [2023-08-24 03:20:41,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097358121330724 [2023-08-24 03:20:41,724 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 1675 transitions. [2023-08-24 03:20:41,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 1675 transitions. [2023-08-24 03:20:41,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:41,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 1675 transitions. [2023-08-24 03:20:41,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 59.82142857142857) internal successors, (1675), 28 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:41,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:41,727 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 146.0) internal successors, (4234), 29 states have internal predecessors, (4234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:41,727 INFO L175 Difference]: Start difference. First operand has 419 places, 926 transitions, 16071 flow. Second operand 28 states and 1675 transitions. [2023-08-24 03:20:41,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 1108 transitions, 22286 flow [2023-08-24 03:20:42,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1108 transitions, 19918 flow, removed 1102 selfloop flow, removed 19 redundant places. [2023-08-24 03:20:42,491 INFO L231 Difference]: Finished difference. Result has 434 places, 1003 transitions, 17350 flow [2023-08-24 03:20:42,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=15251, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=790, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=17350, PETRI_PLACES=434, PETRI_TRANSITIONS=1003} [2023-08-24 03:20:42,492 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 414 predicate places. [2023-08-24 03:20:42,492 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 1003 transitions, 17350 flow [2023-08-24 03:20:42,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:42,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:42,493 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:42,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:42,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:42,698 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:42,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash 342899340, now seen corresponding path program 31 times [2023-08-24 03:20:42,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:42,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843436853] [2023-08-24 03:20:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:42,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:42,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:42,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:42,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843436853] [2023-08-24 03:20:42,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843436853] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:42,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797900657] [2023-08-24 03:20:42,868 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:20:42,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:42,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:42,869 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:42,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-24 03:20:42,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:42,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 03:20:42,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:43,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:43,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797900657] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:43,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:43,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2023-08-24 03:20:43,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263472625] [2023-08-24 03:20:43,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:43,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-24 03:20:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:43,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-24 03:20:43,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2023-08-24 03:20:43,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:43,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 1003 transitions, 17350 flow. Second operand has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:43,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:43,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:43,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:45,769 INFO L124 PetriNetUnfolderBase]: 3271/5696 cut-off events. [2023-08-24 03:20:45,769 INFO L125 PetriNetUnfolderBase]: For 186383/186383 co-relation queries the response was YES. [2023-08-24 03:20:45,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54934 conditions, 5696 events. 3271/5696 cut-off events. For 186383/186383 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 38988 event pairs, 55 based on Foata normal form. 36/5732 useless extension candidates. Maximal degree in co-relation 54691. Up to 2998 conditions per place. [2023-08-24 03:20:45,830 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 651 selfloop transitions, 591 changer transitions 334/1576 dead transitions. [2023-08-24 03:20:45,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1576 transitions, 31440 flow [2023-08-24 03:20:45,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 03:20:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 03:20:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2774 transitions. [2023-08-24 03:20:45,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40425531914893614 [2023-08-24 03:20:45,833 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2774 transitions. [2023-08-24 03:20:45,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2774 transitions. [2023-08-24 03:20:45,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:45,833 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2774 transitions. [2023-08-24 03:20:45,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 59.02127659574468) internal successors, (2774), 47 states have internal predecessors, (2774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:45,838 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:45,838 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:45,838 INFO L175 Difference]: Start difference. First operand has 434 places, 1003 transitions, 17350 flow. Second operand 47 states and 2774 transitions. [2023-08-24 03:20:45,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1576 transitions, 31440 flow [2023-08-24 03:20:47,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 1576 transitions, 30170 flow, removed 572 selfloop flow, removed 17 redundant places. [2023-08-24 03:20:47,054 INFO L231 Difference]: Finished difference. Result has 476 places, 1158 transitions, 22728 flow [2023-08-24 03:20:47,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=16563, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=22728, PETRI_PLACES=476, PETRI_TRANSITIONS=1158} [2023-08-24 03:20:47,055 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-08-24 03:20:47,055 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1158 transitions, 22728 flow [2023-08-24 03:20:47,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:47,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:47,055 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:47,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-24 03:20:47,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:47,259 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:47,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:47,259 INFO L85 PathProgramCache]: Analyzing trace with hash 893803406, now seen corresponding path program 32 times [2023-08-24 03:20:47,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:47,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735589928] [2023-08-24 03:20:47,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:47,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:47,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:47,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:47,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735589928] [2023-08-24 03:20:47,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735589928] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:47,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928757420] [2023-08-24 03:20:47,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:20:47,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:47,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:47,456 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:47,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-24 03:20:47,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:20:47,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:47,517 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-24 03:20:47,518 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:47,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:47,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928757420] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:47,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:47,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 25 [2023-08-24 03:20:47,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702016388] [2023-08-24 03:20:47,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-24 03:20:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:47,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-24 03:20:47,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-08-24 03:20:47,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 146 [2023-08-24 03:20:47,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1158 transitions, 22728 flow. Second operand has 27 states, 27 states have (on average 51.77777777777778) internal successors, (1398), 27 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:47,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:47,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 146 [2023-08-24 03:20:47,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:50,428 INFO L124 PetriNetUnfolderBase]: 3406/5679 cut-off events. [2023-08-24 03:20:50,428 INFO L125 PetriNetUnfolderBase]: For 213645/213645 co-relation queries the response was YES. [2023-08-24 03:20:50,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61639 conditions, 5679 events. 3406/5679 cut-off events. For 213645/213645 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 36454 event pairs, 51 based on Foata normal form. 18/5697 useless extension candidates. Maximal degree in co-relation 61474. Up to 3302 conditions per place. [2023-08-24 03:20:50,512 INFO L140 encePairwiseOnDemand]: 137/146 looper letters, 754 selfloop transitions, 662 changer transitions 243/1659 dead transitions. [2023-08-24 03:20:50,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 1659 transitions, 37225 flow [2023-08-24 03:20:50,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 03:20:50,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 03:20:50,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2585 transitions. [2023-08-24 03:20:50,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3688641552511416 [2023-08-24 03:20:50,515 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2585 transitions. [2023-08-24 03:20:50,515 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2585 transitions. [2023-08-24 03:20:50,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:50,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2585 transitions. [2023-08-24 03:20:50,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 53.854166666666664) internal successors, (2585), 48 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:50,520 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:50,520 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:50,520 INFO L175 Difference]: Start difference. First operand has 476 places, 1158 transitions, 22728 flow. Second operand 48 states and 2585 transitions. [2023-08-24 03:20:50,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 1659 transitions, 37225 flow [2023-08-24 03:20:52,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1659 transitions, 32816 flow, removed 2007 selfloop flow, removed 36 redundant places. [2023-08-24 03:20:52,334 INFO L231 Difference]: Finished difference. Result has 481 places, 1334 transitions, 27000 flow [2023-08-24 03:20:52,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=19843, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=433, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=27000, PETRI_PLACES=481, PETRI_TRANSITIONS=1334} [2023-08-24 03:20:52,335 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 461 predicate places. [2023-08-24 03:20:52,335 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 1334 transitions, 27000 flow [2023-08-24 03:20:52,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 51.77777777777778) internal successors, (1398), 27 states have internal predecessors, (1398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:52,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:52,335 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:52,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:52,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-24 03:20:52,537 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:52,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:52,537 INFO L85 PathProgramCache]: Analyzing trace with hash -639378736, now seen corresponding path program 33 times [2023-08-24 03:20:52,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:52,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154512837] [2023-08-24 03:20:52,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:52,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:52,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:52,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:52,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154512837] [2023-08-24 03:20:52,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154512837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:52,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424963428] [2023-08-24 03:20:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:20:52,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:52,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:52,733 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:52,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-24 03:20:52,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-24 03:20:52,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:52,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:20:52,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:52,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:53,204 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:53,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424963428] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:53,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:53,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 03:20:53,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106717998] [2023-08-24 03:20:53,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:53,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:20:53,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:53,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:20:53,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2023-08-24 03:20:53,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:53,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 1334 transitions, 27000 flow. Second operand has 31 states, 31 states have (on average 56.54838709677419) internal successors, (1753), 31 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:53,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:53,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:53,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:20:56,082 INFO L124 PetriNetUnfolderBase]: 3357/5598 cut-off events. [2023-08-24 03:20:56,082 INFO L125 PetriNetUnfolderBase]: For 194030/194030 co-relation queries the response was YES. [2023-08-24 03:20:56,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59975 conditions, 5598 events. 3357/5598 cut-off events. For 194030/194030 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 35796 event pairs, 51 based on Foata normal form. 14/5610 useless extension candidates. Maximal degree in co-relation 59788. Up to 2260 conditions per place. [2023-08-24 03:20:56,152 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 851 selfloop transitions, 546 changer transitions 206/1603 dead transitions. [2023-08-24 03:20:56,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 1603 transitions, 35942 flow [2023-08-24 03:20:56,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 03:20:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 03:20:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2599 transitions. [2023-08-24 03:20:56,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4045765877957659 [2023-08-24 03:20:56,154 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2599 transitions. [2023-08-24 03:20:56,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2599 transitions. [2023-08-24 03:20:56,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:20:56,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2599 transitions. [2023-08-24 03:20:56,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.06818181818182) internal successors, (2599), 44 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:56,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:56,159 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:56,159 INFO L175 Difference]: Start difference. First operand has 481 places, 1334 transitions, 27000 flow. Second operand 44 states and 2599 transitions. [2023-08-24 03:20:56,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 1603 transitions, 35942 flow [2023-08-24 03:20:58,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 1603 transitions, 32939 flow, removed 1390 selfloop flow, removed 38 redundant places. [2023-08-24 03:20:58,067 INFO L231 Difference]: Finished difference. Result has 476 places, 1278 transitions, 25463 flow [2023-08-24 03:20:58,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=24678, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=478, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=816, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=25463, PETRI_PLACES=476, PETRI_TRANSITIONS=1278} [2023-08-24 03:20:58,067 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 456 predicate places. [2023-08-24 03:20:58,068 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 1278 transitions, 25463 flow [2023-08-24 03:20:58,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.54838709677419) internal successors, (1753), 31 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:58,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:20:58,068 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:20:58,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-24 03:20:58,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-24 03:20:58,272 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:20:58,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:20:58,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1245251294, now seen corresponding path program 34 times [2023-08-24 03:20:58,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:20:58,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598377092] [2023-08-24 03:20:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:20:58,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:20:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:20:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:58,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:20:58,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598377092] [2023-08-24 03:20:58,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598377092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:20:58,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288239886] [2023-08-24 03:20:58,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:20:58,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:20:58,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:20:58,485 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:20:58,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-24 03:20:58,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:20:58,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:20:58,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:20:58,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:20:58,717 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:58,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:20:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:20:58,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288239886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:20:58,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:20:58,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 03:20:58,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101934650] [2023-08-24 03:20:58,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:20:58,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:20:58,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:20:58,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:20:58,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-08-24 03:20:58,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:20:58,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 1278 transitions, 25463 flow. Second operand has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:20:58,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:20:58,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:20:58,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:02,541 INFO L124 PetriNetUnfolderBase]: 3437/5987 cut-off events. [2023-08-24 03:21:02,541 INFO L125 PetriNetUnfolderBase]: For 177389/177389 co-relation queries the response was YES. [2023-08-24 03:21:02,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62238 conditions, 5987 events. 3437/5987 cut-off events. For 177389/177389 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41116 event pairs, 41 based on Foata normal form. 21/6006 useless extension candidates. Maximal degree in co-relation 61996. Up to 2448 conditions per place. [2023-08-24 03:21:02,706 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 823 selfloop transitions, 861 changer transitions 67/1751 dead transitions. [2023-08-24 03:21:02,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 1751 transitions, 39104 flow [2023-08-24 03:21:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-24 03:21:02,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-24 03:21:02,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3595 transitions. [2023-08-24 03:21:02,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40366045362676845 [2023-08-24 03:21:02,708 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3595 transitions. [2023-08-24 03:21:02,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3595 transitions. [2023-08-24 03:21:02,709 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:02,709 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3595 transitions. [2023-08-24 03:21:02,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 58.9344262295082) internal successors, (3595), 61 states have internal predecessors, (3595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:02,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 146.0) internal successors, (9052), 62 states have internal predecessors, (9052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:02,715 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 146.0) internal successors, (9052), 62 states have internal predecessors, (9052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:02,715 INFO L175 Difference]: Start difference. First operand has 476 places, 1278 transitions, 25463 flow. Second operand 61 states and 3595 transitions. [2023-08-24 03:21:02,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 1751 transitions, 39104 flow [2023-08-24 03:21:04,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 1751 transitions, 37743 flow, removed 542 selfloop flow, removed 34 redundant places. [2023-08-24 03:21:04,225 INFO L231 Difference]: Finished difference. Result has 509 places, 1511 transitions, 33167 flow [2023-08-24 03:21:04,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=24548, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=646, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=33167, PETRI_PLACES=509, PETRI_TRANSITIONS=1511} [2023-08-24 03:21:04,226 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 489 predicate places. [2023-08-24 03:21:04,226 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1511 transitions, 33167 flow [2023-08-24 03:21:04,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:04,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:04,227 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:04,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-24 03:21:04,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-24 03:21:04,427 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:21:04,427 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:04,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1217545664, now seen corresponding path program 35 times [2023-08-24 03:21:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:04,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890353295] [2023-08-24 03:21:04,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:04,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:04,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:04,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890353295] [2023-08-24 03:21:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890353295] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620403431] [2023-08-24 03:21:04,606 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:21:04,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:04,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:04,607 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:21:04,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-24 03:21:04,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 03:21:04,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:21:04,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:21:04,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:04,822 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:04,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:05,078 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:05,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620403431] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:05,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:05,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-08-24 03:21:05,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072012737] [2023-08-24 03:21:05,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:05,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-24 03:21:05,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:05,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-24 03:21:05,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=793, Unknown=0, NotChecked=0, Total=930 [2023-08-24 03:21:05,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:21:05,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1511 transitions, 33167 flow. Second operand has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:05,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:05,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:21:05,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:08,556 INFO L124 PetriNetUnfolderBase]: 3328/5715 cut-off events. [2023-08-24 03:21:08,556 INFO L125 PetriNetUnfolderBase]: For 168575/168575 co-relation queries the response was YES. [2023-08-24 03:21:08,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61761 conditions, 5715 events. 3328/5715 cut-off events. For 168575/168575 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 38053 event pairs, 43 based on Foata normal form. 30/5741 useless extension candidates. Maximal degree in co-relation 61589. Up to 2444 conditions per place. [2023-08-24 03:21:08,633 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 751 selfloop transitions, 798 changer transitions 149/1698 dead transitions. [2023-08-24 03:21:08,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 1698 transitions, 40021 flow [2023-08-24 03:21:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-24 03:21:08,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-24 03:21:08,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2947 transitions. [2023-08-24 03:21:08,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4036986301369863 [2023-08-24 03:21:08,636 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2947 transitions. [2023-08-24 03:21:08,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2947 transitions. [2023-08-24 03:21:08,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:08,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2947 transitions. [2023-08-24 03:21:08,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 58.94) internal successors, (2947), 50 states have internal predecessors, (2947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:08,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 146.0) internal successors, (7446), 51 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:08,642 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 146.0) internal successors, (7446), 51 states have internal predecessors, (7446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:08,642 INFO L175 Difference]: Start difference. First operand has 509 places, 1511 transitions, 33167 flow. Second operand 50 states and 2947 transitions. [2023-08-24 03:21:08,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 1698 transitions, 40021 flow [2023-08-24 03:21:10,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 1698 transitions, 38490 flow, removed 577 selfloop flow, removed 33 redundant places. [2023-08-24 03:21:10,559 INFO L231 Difference]: Finished difference. Result has 522 places, 1428 transitions, 32621 flow [2023-08-24 03:21:10,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=31675, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=773, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=718, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=32621, PETRI_PLACES=522, PETRI_TRANSITIONS=1428} [2023-08-24 03:21:10,560 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 502 predicate places. [2023-08-24 03:21:10,560 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1428 transitions, 32621 flow [2023-08-24 03:21:10,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:10,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:10,561 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:10,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-24 03:21:10,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:10,764 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:21:10,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1137780526, now seen corresponding path program 36 times [2023-08-24 03:21:10,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:10,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865173147] [2023-08-24 03:21:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:10,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:10,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:10,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865173147] [2023-08-24 03:21:10,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865173147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:10,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469108163] [2023-08-24 03:21:10,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:21:10,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:10,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:10,971 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:21:10,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-24 03:21:11,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 03:21:11,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:21:11,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:21:11,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:11,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:11,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469108163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:11,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:11,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 03:21:11,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989284915] [2023-08-24 03:21:11,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:11,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:21:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:11,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:21:11,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:21:11,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:21:11,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1428 transitions, 32621 flow. Second operand has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:11,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:11,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:21:11,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:14,681 INFO L124 PetriNetUnfolderBase]: 3898/6402 cut-off events. [2023-08-24 03:21:14,682 INFO L125 PetriNetUnfolderBase]: For 208066/208066 co-relation queries the response was YES. [2023-08-24 03:21:14,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75911 conditions, 6402 events. 3898/6402 cut-off events. For 208066/208066 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 40680 event pairs, 43 based on Foata normal form. 13/6411 useless extension candidates. Maximal degree in co-relation 75743. Up to 2783 conditions per place. [2023-08-24 03:21:14,765 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 840 selfloop transitions, 921 changer transitions 277/2038 dead transitions. [2023-08-24 03:21:14,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 2038 transitions, 53642 flow [2023-08-24 03:21:14,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 03:21:14,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 03:21:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2997 transitions. [2023-08-24 03:21:14,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024979854955681 [2023-08-24 03:21:14,768 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2997 transitions. [2023-08-24 03:21:14,768 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2997 transitions. [2023-08-24 03:21:14,768 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:14,768 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2997 transitions. [2023-08-24 03:21:14,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.76470588235294) internal successors, (2997), 51 states have internal predecessors, (2997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:14,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:14,773 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:14,773 INFO L175 Difference]: Start difference. First operand has 522 places, 1428 transitions, 32621 flow. Second operand 51 states and 2997 transitions. [2023-08-24 03:21:14,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 2038 transitions, 53642 flow [2023-08-24 03:21:17,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 2038 transitions, 50873 flow, removed 871 selfloop flow, removed 40 redundant places. [2023-08-24 03:21:17,108 INFO L231 Difference]: Finished difference. Result has 541 places, 1641 transitions, 41134 flow [2023-08-24 03:21:17,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=30735, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=675, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=645, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=41134, PETRI_PLACES=541, PETRI_TRANSITIONS=1641} [2023-08-24 03:21:17,110 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 521 predicate places. [2023-08-24 03:21:17,110 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 1641 transitions, 41134 flow [2023-08-24 03:21:17,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:17,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:17,110 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:17,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-24 03:21:17,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-24 03:21:17,314 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:21:17,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -758524900, now seen corresponding path program 37 times [2023-08-24 03:21:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:17,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925113112] [2023-08-24 03:21:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:17,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925113112] [2023-08-24 03:21:17,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925113112] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:17,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779506141] [2023-08-24 03:21:17,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:21:17,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:17,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:17,482 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:21:17,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-24 03:21:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:17,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:21:17,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:17,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:17,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779506141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:17,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:17,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 03:21:17,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950147145] [2023-08-24 03:21:17,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:17,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:21:17,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:17,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:21:17,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:21:17,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:21:17,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 1641 transitions, 41134 flow. Second operand has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:17,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:17,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:21:17,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:21,881 INFO L124 PetriNetUnfolderBase]: 4410/7153 cut-off events. [2023-08-24 03:21:21,881 INFO L125 PetriNetUnfolderBase]: For 277514/277514 co-relation queries the response was YES. [2023-08-24 03:21:22,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86974 conditions, 7153 events. 4410/7153 cut-off events. For 277514/277514 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 45118 event pairs, 33 based on Foata normal form. 4/7153 useless extension candidates. Maximal degree in co-relation 86687. Up to 4591 conditions per place. [2023-08-24 03:21:22,081 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1571 selfloop transitions, 405 changer transitions 134/2110 dead transitions. [2023-08-24 03:21:22,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 560 places, 2110 transitions, 54677 flow [2023-08-24 03:21:22,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-24 03:21:22,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-24 03:21:22,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2256 transitions. [2023-08-24 03:21:22,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40663302090843545 [2023-08-24 03:21:22,083 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2256 transitions. [2023-08-24 03:21:22,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2256 transitions. [2023-08-24 03:21:22,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:22,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2256 transitions. [2023-08-24 03:21:22,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.36842105263158) internal successors, (2256), 38 states have internal predecessors, (2256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:22,087 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:22,087 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 146.0) internal successors, (5694), 39 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:22,088 INFO L175 Difference]: Start difference. First operand has 541 places, 1641 transitions, 41134 flow. Second operand 38 states and 2256 transitions. [2023-08-24 03:21:22,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 560 places, 2110 transitions, 54677 flow [2023-08-24 03:21:25,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 2110 transitions, 50146 flow, removed 2021 selfloop flow, removed 33 redundant places. [2023-08-24 03:21:25,245 INFO L231 Difference]: Finished difference. Result has 540 places, 1826 transitions, 42231 flow [2023-08-24 03:21:25,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=36953, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=42231, PETRI_PLACES=540, PETRI_TRANSITIONS=1826} [2023-08-24 03:21:25,245 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 520 predicate places. [2023-08-24 03:21:25,246 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 1826 transitions, 42231 flow [2023-08-24 03:21:25,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:25,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:25,246 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:25,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-24 03:21:25,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-24 03:21:25,449 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:21:25,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:25,449 INFO L85 PathProgramCache]: Analyzing trace with hash -934752458, now seen corresponding path program 38 times [2023-08-24 03:21:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:25,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115290626] [2023-08-24 03:21:25,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:25,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:25,619 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:25,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115290626] [2023-08-24 03:21:25,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115290626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:25,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871523200] [2023-08-24 03:21:25,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:21:25,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:25,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:25,620 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:21:25,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-24 03:21:25,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:21:25,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:21:25,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:21:25,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:25,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:26,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871523200] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:26,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:26,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 27 [2023-08-24 03:21:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378367379] [2023-08-24 03:21:26,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:26,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-24 03:21:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-24 03:21:26,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2023-08-24 03:21:26,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:21:26,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 1826 transitions, 42231 flow. Second operand has 29 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:26,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:26,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:21:26,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:30,767 INFO L124 PetriNetUnfolderBase]: 5411/8789 cut-off events. [2023-08-24 03:21:30,768 INFO L125 PetriNetUnfolderBase]: For 376619/376619 co-relation queries the response was YES. [2023-08-24 03:21:30,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109521 conditions, 8789 events. 5411/8789 cut-off events. For 376619/376619 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 57227 event pairs, 41 based on Foata normal form. 21/8808 useless extension candidates. Maximal degree in co-relation 109240. Up to 5605 conditions per place. [2023-08-24 03:21:30,890 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1584 selfloop transitions, 541 changer transitions 499/2624 dead transitions. [2023-08-24 03:21:30,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 2624 transitions, 69634 flow [2023-08-24 03:21:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-24 03:21:30,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-24 03:21:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2995 transitions. [2023-08-24 03:21:30,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40222938490464677 [2023-08-24 03:21:30,893 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2995 transitions. [2023-08-24 03:21:30,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2995 transitions. [2023-08-24 03:21:30,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:30,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2995 transitions. [2023-08-24 03:21:30,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.72549019607843) internal successors, (2995), 51 states have internal predecessors, (2995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:30,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:30,898 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 146.0) internal successors, (7592), 52 states have internal predecessors, (7592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:30,898 INFO L175 Difference]: Start difference. First operand has 540 places, 1826 transitions, 42231 flow. Second operand 51 states and 2995 transitions. [2023-08-24 03:21:30,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 2624 transitions, 69634 flow [2023-08-24 03:21:35,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 2624 transitions, 62661 flow, removed 3430 selfloop flow, removed 25 redundant places. [2023-08-24 03:21:35,250 INFO L231 Difference]: Finished difference. Result has 581 places, 2015 transitions, 48660 flow [2023-08-24 03:21:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=40684, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1826, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=48660, PETRI_PLACES=581, PETRI_TRANSITIONS=2015} [2023-08-24 03:21:35,251 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 561 predicate places. [2023-08-24 03:21:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 581 places, 2015 transitions, 48660 flow [2023-08-24 03:21:35,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 56.58620689655172) internal successors, (1641), 29 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:35,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:35,251 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:35,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-24 03:21:35,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-24 03:21:35,452 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:21:35,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:35,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1225309386, now seen corresponding path program 39 times [2023-08-24 03:21:35,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:35,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940265769] [2023-08-24 03:21:35,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:35,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:35,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940265769] [2023-08-24 03:21:35,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940265769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886248371] [2023-08-24 03:21:35,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:21:35,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:35,628 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:21:35,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-24 03:21:35,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 03:21:35,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:21:35,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-24 03:21:35,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:35,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:36,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:36,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886248371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:36,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:36,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-08-24 03:21:36,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192675757] [2023-08-24 03:21:36,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:36,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:21:36,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:36,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:21:36,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:21:36,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:21:36,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 581 places, 2015 transitions, 48660 flow. Second operand has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:36,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:36,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:21:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:21:42,317 INFO L124 PetriNetUnfolderBase]: 6437/10435 cut-off events. [2023-08-24 03:21:42,317 INFO L125 PetriNetUnfolderBase]: For 524068/524068 co-relation queries the response was YES. [2023-08-24 03:21:42,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138716 conditions, 10435 events. 6437/10435 cut-off events. For 524068/524068 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 68480 event pairs, 45 based on Foata normal form. 21/10452 useless extension candidates. Maximal degree in co-relation 138531. Up to 6043 conditions per place. [2023-08-24 03:21:42,502 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1752 selfloop transitions, 897 changer transitions 246/2895 dead transitions. [2023-08-24 03:21:42,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 2895 transitions, 78221 flow [2023-08-24 03:21:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-24 03:21:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-24 03:21:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3126 transitions. [2023-08-24 03:21:42,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403980356681313 [2023-08-24 03:21:42,504 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3126 transitions. [2023-08-24 03:21:42,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3126 transitions. [2023-08-24 03:21:42,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:21:42,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3126 transitions. [2023-08-24 03:21:42,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 58.9811320754717) internal successors, (3126), 53 states have internal predecessors, (3126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:42,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 146.0) internal successors, (7884), 54 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:42,510 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 146.0) internal successors, (7884), 54 states have internal predecessors, (7884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:42,510 INFO L175 Difference]: Start difference. First operand has 581 places, 2015 transitions, 48660 flow. Second operand 53 states and 3126 transitions. [2023-08-24 03:21:42,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 2895 transitions, 78221 flow [2023-08-24 03:21:50,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 588 places, 2895 transitions, 69157 flow, removed 4324 selfloop flow, removed 28 redundant places. [2023-08-24 03:21:50,431 INFO L231 Difference]: Finished difference. Result has 609 places, 2507 transitions, 60167 flow [2023-08-24 03:21:50,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=44803, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2015, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=488, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=60167, PETRI_PLACES=609, PETRI_TRANSITIONS=2507} [2023-08-24 03:21:50,433 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 589 predicate places. [2023-08-24 03:21:50,433 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 2507 transitions, 60167 flow [2023-08-24 03:21:50,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:50,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:21:50,433 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:21:50,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-08-24 03:21:50,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-24 03:21:50,633 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:21:50,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:21:50,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1776174790, now seen corresponding path program 40 times [2023-08-24 03:21:50,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:21:50,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222678162] [2023-08-24 03:21:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:21:50,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:21:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:21:50,811 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:50,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:21:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222678162] [2023-08-24 03:21:50,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222678162] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:21:50,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816901662] [2023-08-24 03:21:50,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:21:50,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:21:50,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:21:50,812 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:21:50,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-24 03:21:50,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:21:50,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:21:50,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:21:50,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:21:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:51,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:21:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:21:51,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816901662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:21:51,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:21:51,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 03:21:51,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521560737] [2023-08-24 03:21:51,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:21:51,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:21:51,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:21:51,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:21:51,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 03:21:51,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:21:51,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 2507 transitions, 60167 flow. Second operand has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:21:51,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:21:51,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:21:51,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:22:01,627 INFO L124 PetriNetUnfolderBase]: 9571/15241 cut-off events. [2023-08-24 03:22:01,627 INFO L125 PetriNetUnfolderBase]: For 727649/727649 co-relation queries the response was YES. [2023-08-24 03:22:01,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 204352 conditions, 15241 events. 9571/15241 cut-off events. For 727649/727649 co-relation queries the response was YES. Maximal size of possible extension queue 866. Compared 104832 event pairs, 47 based on Foata normal form. 15/15252 useless extension candidates. Maximal degree in co-relation 204157. Up to 6779 conditions per place. [2023-08-24 03:22:01,998 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 2039 selfloop transitions, 2175 changer transitions 92/4306 dead transitions. [2023-08-24 03:22:01,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 664 places, 4306 transitions, 116205 flow [2023-08-24 03:22:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-24 03:22:01,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-24 03:22:02,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3668 transitions. [2023-08-24 03:22:02,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4052143172779496 [2023-08-24 03:22:02,002 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3668 transitions. [2023-08-24 03:22:02,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3668 transitions. [2023-08-24 03:22:02,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:22:02,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3668 transitions. [2023-08-24 03:22:02,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 59.16129032258065) internal successors, (3668), 62 states have internal predecessors, (3668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:02,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 146.0) internal successors, (9198), 63 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:02,008 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 146.0) internal successors, (9198), 63 states have internal predecessors, (9198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:02,008 INFO L175 Difference]: Start difference. First operand has 609 places, 2507 transitions, 60167 flow. Second operand 62 states and 3668 transitions. [2023-08-24 03:22:02,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 664 places, 4306 transitions, 116205 flow [2023-08-24 03:22:13,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 641 places, 4306 transitions, 111924 flow, removed 2075 selfloop flow, removed 23 redundant places. [2023-08-24 03:22:13,117 INFO L231 Difference]: Finished difference. Result has 654 places, 3837 transitions, 100267 flow [2023-08-24 03:22:13,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=56404, PETRI_DIFFERENCE_MINUEND_PLACES=580, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2507, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=100267, PETRI_PLACES=654, PETRI_TRANSITIONS=3837} [2023-08-24 03:22:13,119 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 634 predicate places. [2023-08-24 03:22:13,119 INFO L495 AbstractCegarLoop]: Abstraction has has 654 places, 3837 transitions, 100267 flow [2023-08-24 03:22:13,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:13,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:22:13,119 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:22:13,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-24 03:22:13,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:22:13,325 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:22:13,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:22:13,326 INFO L85 PathProgramCache]: Analyzing trace with hash 709461436, now seen corresponding path program 41 times [2023-08-24 03:22:13,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:22:13,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117211763] [2023-08-24 03:22:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:22:13,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:22:13,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:22:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:13,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:22:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117211763] [2023-08-24 03:22:13,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117211763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:22:13,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356045063] [2023-08-24 03:22:13,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:22:13,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:22:13,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:22:13,540 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:22:13,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-24 03:22:13,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-24 03:22:13,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:22:13,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:22:13,608 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:22:13,789 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:13,789 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:22:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:14,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356045063] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:22:14,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:22:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 03:22:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579908418] [2023-08-24 03:22:14,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:22:14,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:22:14,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:22:14,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:22:14,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=948, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 03:22:14,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:22:14,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 654 places, 3837 transitions, 100267 flow. Second operand has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:14,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:22:14,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:22:14,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:22:30,685 INFO L124 PetriNetUnfolderBase]: 11830/18670 cut-off events. [2023-08-24 03:22:30,685 INFO L125 PetriNetUnfolderBase]: For 979564/979564 co-relation queries the response was YES. [2023-08-24 03:22:30,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270447 conditions, 18670 events. 11830/18670 cut-off events. For 979564/979564 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 129930 event pairs, 55 based on Foata normal form. 15/18683 useless extension candidates. Maximal degree in co-relation 270245. Up to 9221 conditions per place. [2023-08-24 03:22:31,034 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1976 selfloop transitions, 2803 changer transitions 312/5091 dead transitions. [2023-08-24 03:22:31,035 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 703 places, 5091 transitions, 155459 flow [2023-08-24 03:22:31,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 03:22:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 03:22:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3367 transitions. [2023-08-24 03:22:31,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40459024273011296 [2023-08-24 03:22:31,037 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3367 transitions. [2023-08-24 03:22:31,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3367 transitions. [2023-08-24 03:22:31,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:22:31,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3367 transitions. [2023-08-24 03:22:31,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 59.07017543859649) internal successors, (3367), 57 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:31,043 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:31,043 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:31,043 INFO L175 Difference]: Start difference. First operand has 654 places, 3837 transitions, 100267 flow. Second operand 57 states and 3367 transitions. [2023-08-24 03:22:31,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 703 places, 5091 transitions, 155459 flow [2023-08-24 03:22:53,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 668 places, 5091 transitions, 143558 flow, removed 5776 selfloop flow, removed 35 redundant places. [2023-08-24 03:22:53,130 INFO L231 Difference]: Finished difference. Result has 682 places, 4564 transitions, 132031 flow [2023-08-24 03:22:53,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=95902, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3837, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2047, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=132031, PETRI_PLACES=682, PETRI_TRANSITIONS=4564} [2023-08-24 03:22:53,133 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 662 predicate places. [2023-08-24 03:22:53,133 INFO L495 AbstractCegarLoop]: Abstraction has has 682 places, 4564 transitions, 132031 flow [2023-08-24 03:22:53,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.470588235294116) internal successors, (1920), 34 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:53,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:22:53,133 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:22:53,137 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-08-24 03:22:53,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:22:53,334 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:22:53,334 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:22:53,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1789074614, now seen corresponding path program 42 times [2023-08-24 03:22:53,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:22:53,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461126253] [2023-08-24 03:22:53,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:22:53,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:22:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:22:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:53,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:22:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461126253] [2023-08-24 03:22:53,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461126253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:22:53,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651135573] [2023-08-24 03:22:53,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:22:53,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:22:53,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:22:53,498 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:22:53,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-24 03:22:53,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-24 03:22:53,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:22:53,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:22:53,571 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:22:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:53,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:22:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:22:53,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651135573] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:22:53,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:22:53,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-24 03:22:53,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529450667] [2023-08-24 03:22:53,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:22:53,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:22:53,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:22:53,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:22:53,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=943, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 03:22:53,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:22:53,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 682 places, 4564 transitions, 132031 flow. Second operand has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:22:53,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:22:53,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:22:53,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:23:16,617 INFO L124 PetriNetUnfolderBase]: 13239/20783 cut-off events. [2023-08-24 03:23:16,617 INFO L125 PetriNetUnfolderBase]: For 955022/955022 co-relation queries the response was YES. [2023-08-24 03:23:16,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 303815 conditions, 20783 events. 13239/20783 cut-off events. For 955022/955022 co-relation queries the response was YES. Maximal size of possible extension queue 1114. Compared 145164 event pairs, 51 based on Foata normal form. 7/20786 useless extension candidates. Maximal degree in co-relation 303604. Up to 10297 conditions per place. [2023-08-24 03:23:17,005 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1615 selfloop transitions, 3280 changer transitions 691/5586 dead transitions. [2023-08-24 03:23:17,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 725 places, 5586 transitions, 176670 flow [2023-08-24 03:23:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-24 03:23:17,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-24 03:23:17,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3070 transitions. [2023-08-24 03:23:17,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40437302423603794 [2023-08-24 03:23:17,007 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3070 transitions. [2023-08-24 03:23:17,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3070 transitions. [2023-08-24 03:23:17,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:23:17,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3070 transitions. [2023-08-24 03:23:17,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 59.03846153846154) internal successors, (3070), 52 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:23:17,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 146.0) internal successors, (7738), 53 states have internal predecessors, (7738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:23:17,013 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 146.0) internal successors, (7738), 53 states have internal predecessors, (7738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:23:17,013 INFO L175 Difference]: Start difference. First operand has 682 places, 4564 transitions, 132031 flow. Second operand 52 states and 3070 transitions. [2023-08-24 03:23:17,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 725 places, 5586 transitions, 176670 flow [2023-08-24 03:23:43,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 5586 transitions, 162972 flow, removed 6611 selfloop flow, removed 30 redundant places. [2023-08-24 03:23:44,019 INFO L231 Difference]: Finished difference. Result has 706 places, 4713 transitions, 138804 flow [2023-08-24 03:23:44,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=122194, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2631, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1870, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=138804, PETRI_PLACES=706, PETRI_TRANSITIONS=4713} [2023-08-24 03:23:44,021 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 686 predicate places. [2023-08-24 03:23:44,021 INFO L495 AbstractCegarLoop]: Abstraction has has 706 places, 4713 transitions, 138804 flow [2023-08-24 03:23:44,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:23:44,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:23:44,022 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:23:44,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-24 03:23:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-24 03:23:44,222 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:23:44,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:23:44,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1257179218, now seen corresponding path program 43 times [2023-08-24 03:23:44,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:23:44,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151560233] [2023-08-24 03:23:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:23:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:23:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:23:44,435 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:23:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:23:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151560233] [2023-08-24 03:23:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151560233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:23:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12381683] [2023-08-24 03:23:44,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:23:44,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:23:44,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:23:44,437 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:23:44,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-24 03:23:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:23:44,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-24 03:23:44,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:23:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:23:44,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:23:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:23:44,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12381683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:23:44,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:23:44,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-08-24 03:23:44,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453433970] [2023-08-24 03:23:44,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:23:44,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-24 03:23:44,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:23:44,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-24 03:23:44,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=875, Unknown=0, NotChecked=0, Total=1056 [2023-08-24 03:23:44,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:23:44,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 706 places, 4713 transitions, 138804 flow. Second operand has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:23:44,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:23:44,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:23:44,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:24:08,437 INFO L124 PetriNetUnfolderBase]: 13127/21242 cut-off events. [2023-08-24 03:24:08,437 INFO L125 PetriNetUnfolderBase]: For 928401/928401 co-relation queries the response was YES. [2023-08-24 03:24:08,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 305671 conditions, 21242 events. 13127/21242 cut-off events. For 928401/928401 co-relation queries the response was YES. Maximal size of possible extension queue 1134. Compared 156029 event pairs, 119 based on Foata normal form. 12/21252 useless extension candidates. Maximal degree in co-relation 305456. Up to 15800 conditions per place. [2023-08-24 03:24:08,852 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 4099 selfloop transitions, 1177 changer transitions 139/5415 dead transitions. [2023-08-24 03:24:08,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 5415 transitions, 167369 flow [2023-08-24 03:24:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-24 03:24:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-24 03:24:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2898 transitions. [2023-08-24 03:24:08,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050880626223092 [2023-08-24 03:24:08,855 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2898 transitions. [2023-08-24 03:24:08,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2898 transitions. [2023-08-24 03:24:08,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:24:08,855 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2898 transitions. [2023-08-24 03:24:08,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 59.142857142857146) internal successors, (2898), 49 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:08,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 146.0) internal successors, (7300), 50 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:08,860 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 146.0) internal successors, (7300), 50 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:08,860 INFO L175 Difference]: Start difference. First operand has 706 places, 4713 transitions, 138804 flow. Second operand 49 states and 2898 transitions. [2023-08-24 03:24:08,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 5415 transitions, 167369 flow [2023-08-24 03:24:33,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 696 places, 5415 transitions, 164448 flow, removed 938 selfloop flow, removed 37 redundant places. [2023-08-24 03:24:33,867 INFO L231 Difference]: Finished difference. Result has 711 places, 5076 transitions, 149900 flow [2023-08-24 03:24:33,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=136157, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=819, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3827, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=149900, PETRI_PLACES=711, PETRI_TRANSITIONS=5076} [2023-08-24 03:24:33,870 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 691 predicate places. [2023-08-24 03:24:33,870 INFO L495 AbstractCegarLoop]: Abstraction has has 711 places, 5076 transitions, 149900 flow [2023-08-24 03:24:33,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:33,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:24:33,870 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:24:33,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-24 03:24:34,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-24 03:24:34,074 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:24:34,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:24:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1236276169, now seen corresponding path program 44 times [2023-08-24 03:24:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:24:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232336558] [2023-08-24 03:24:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:24:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:24:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:24:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:24:34,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:24:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232336558] [2023-08-24 03:24:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232336558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:24:34,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549536876] [2023-08-24 03:24:34,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:24:34,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:24:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:24:34,236 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:24:34,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-24 03:24:34,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:24:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:24:34,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-24 03:24:34,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:24:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:24:34,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:24:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:24:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549536876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:24:34,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:24:34,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 10] total 28 [2023-08-24 03:24:34,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443578645] [2023-08-24 03:24:34,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:24:34,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-24 03:24:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:24:34,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-24 03:24:34,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2023-08-24 03:24:34,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:24:34,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 711 places, 5076 transitions, 149900 flow. Second operand has 30 states, 30 states have (on average 56.6) internal successors, (1698), 30 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:24:34,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:24:34,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:24:34,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:25:02,545 INFO L124 PetriNetUnfolderBase]: 13952/22680 cut-off events. [2023-08-24 03:25:02,545 INFO L125 PetriNetUnfolderBase]: For 994435/994435 co-relation queries the response was YES. [2023-08-24 03:25:02,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331922 conditions, 22680 events. 13952/22680 cut-off events. For 994435/994435 co-relation queries the response was YES. Maximal size of possible extension queue 1183. Compared 169087 event pairs, 41 based on Foata normal form. 19/22697 useless extension candidates. Maximal degree in co-relation 331703. Up to 13604 conditions per place. [2023-08-24 03:25:02,993 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 3779 selfloop transitions, 1539 changer transitions 413/5731 dead transitions. [2023-08-24 03:25:02,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 733 places, 5731 transitions, 182748 flow [2023-08-24 03:25:02,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-24 03:25:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-24 03:25:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1715 transitions. [2023-08-24 03:25:02,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4050543221539915 [2023-08-24 03:25:02,995 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1715 transitions. [2023-08-24 03:25:02,995 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1715 transitions. [2023-08-24 03:25:02,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:25:02,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1715 transitions. [2023-08-24 03:25:02,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 59.13793103448276) internal successors, (1715), 29 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:02,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:02,998 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 146.0) internal successors, (4380), 30 states have internal predecessors, (4380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:02,998 INFO L175 Difference]: Start difference. First operand has 711 places, 5076 transitions, 149900 flow. Second operand 29 states and 1715 transitions. [2023-08-24 03:25:02,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 733 places, 5731 transitions, 182748 flow [2023-08-24 03:25:26,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 5731 transitions, 179664 flow, removed 1486 selfloop flow, removed 21 redundant places. [2023-08-24 03:25:26,844 INFO L231 Difference]: Finished difference. Result has 718 places, 5266 transitions, 160989 flow [2023-08-24 03:25:26,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=148175, PETRI_DIFFERENCE_MINUEND_PLACES=684, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5075, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=160989, PETRI_PLACES=718, PETRI_TRANSITIONS=5266} [2023-08-24 03:25:26,847 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 698 predicate places. [2023-08-24 03:25:26,847 INFO L495 AbstractCegarLoop]: Abstraction has has 718 places, 5266 transitions, 160989 flow [2023-08-24 03:25:26,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.6) internal successors, (1698), 30 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:26,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:25:26,848 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:25:26,851 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-24 03:25:27,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-24 03:25:27,052 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:25:27,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:25:27,052 INFO L85 PathProgramCache]: Analyzing trace with hash 570199397, now seen corresponding path program 45 times [2023-08-24 03:25:27,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:25:27,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458426093] [2023-08-24 03:25:27,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:25:27,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:25:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:25:27,240 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:25:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:25:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458426093] [2023-08-24 03:25:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458426093] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:25:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466107319] [2023-08-24 03:25:27,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:25:27,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:25:27,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:25:27,241 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:25:27,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-24 03:25:27,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-24 03:25:27,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:25:27,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 03:25:27,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:25:27,504 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:25:27,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:25:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:25:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466107319] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:25:27,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:25:27,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 11] total 33 [2023-08-24 03:25:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105819633] [2023-08-24 03:25:27,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:25:27,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 03:25:27,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:25:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 03:25:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 03:25:27,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:25:27,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 718 places, 5266 transitions, 160989 flow. Second operand has 35 states, 35 states have (on average 56.48571428571429) internal successors, (1977), 35 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:25:27,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:25:27,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:25:27,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:26:04,959 INFO L124 PetriNetUnfolderBase]: 17968/29140 cut-off events. [2023-08-24 03:26:04,959 INFO L125 PetriNetUnfolderBase]: For 1270188/1270188 co-relation queries the response was YES. [2023-08-24 03:26:05,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441984 conditions, 29140 events. 17968/29140 cut-off events. For 1270188/1270188 co-relation queries the response was YES. Maximal size of possible extension queue 1537. Compared 225739 event pairs, 121 based on Foata normal form. 17/29153 useless extension candidates. Maximal degree in co-relation 441763. Up to 15401 conditions per place. [2023-08-24 03:26:05,607 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 3774 selfloop transitions, 3068 changer transitions 848/7690 dead transitions. [2023-08-24 03:26:05,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 765 places, 7690 transitions, 257824 flow [2023-08-24 03:26:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-24 03:26:05,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-24 03:26:05,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 3366 transitions. [2023-08-24 03:26:05,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40447007930785867 [2023-08-24 03:26:05,611 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 3366 transitions. [2023-08-24 03:26:05,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 3366 transitions. [2023-08-24 03:26:05,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:26:05,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 3366 transitions. [2023-08-24 03:26:05,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 59.05263157894737) internal successors, (3366), 57 states have internal predecessors, (3366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:26:05,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:26:05,617 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 146.0) internal successors, (8468), 58 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:26:05,617 INFO L175 Difference]: Start difference. First operand has 718 places, 5266 transitions, 160989 flow. Second operand 57 states and 3366 transitions. [2023-08-24 03:26:05,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 765 places, 7690 transitions, 257824 flow [2023-08-24 03:26:46,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 743 places, 7690 transitions, 246476 flow, removed 3875 selfloop flow, removed 22 redundant places. [2023-08-24 03:26:46,164 INFO L231 Difference]: Finished difference. Result has 762 places, 6526 transitions, 209497 flow [2023-08-24 03:26:46,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=151232, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=5266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1813, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=209497, PETRI_PLACES=762, PETRI_TRANSITIONS=6526} [2023-08-24 03:26:46,167 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 742 predicate places. [2023-08-24 03:26:46,167 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 6526 transitions, 209497 flow [2023-08-24 03:26:46,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.48571428571429) internal successors, (1977), 35 states have internal predecessors, (1977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:26:46,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:26:46,168 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:26:46,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-24 03:26:46,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:26:46,372 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:26:46,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:26:46,372 INFO L85 PathProgramCache]: Analyzing trace with hash -2065846847, now seen corresponding path program 46 times [2023-08-24 03:26:46,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:26:46,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566769875] [2023-08-24 03:26:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:26:46,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:26:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:26:46,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:26:46,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:26:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566769875] [2023-08-24 03:26:46,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566769875] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:26:46,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600330999] [2023-08-24 03:26:46,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-24 03:26:46,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:26:46,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:26:46,553 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:26:46,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-24 03:26:46,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-24 03:26:46,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:26:46,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-24 03:26:46,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:26:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:26:46,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:26:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:26:47,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600330999] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:26:47,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:26:47,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-08-24 03:26:47,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861347710] [2023-08-24 03:26:47,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:26:47,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-24 03:26:47,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:26:47,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-24 03:26:47,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-08-24 03:26:47,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:26:47,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 6526 transitions, 209497 flow. Second operand has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:26:47,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:26:47,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:26:47,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:27:31,801 INFO L124 PetriNetUnfolderBase]: 16564/27134 cut-off events. [2023-08-24 03:27:31,801 INFO L125 PetriNetUnfolderBase]: For 1137502/1137502 co-relation queries the response was YES. [2023-08-24 03:27:32,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413191 conditions, 27134 events. 16564/27134 cut-off events. For 1137502/1137502 co-relation queries the response was YES. Maximal size of possible extension queue 1441. Compared 211174 event pairs, 81 based on Foata normal form. 19/27149 useless extension candidates. Maximal degree in co-relation 412961. Up to 13935 conditions per place. [2023-08-24 03:27:32,567 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 2613 selfloop transitions, 3941 changer transitions 269/6823 dead transitions. [2023-08-24 03:27:32,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 6823 transitions, 232155 flow [2023-08-24 03:27:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-24 03:27:32,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-24 03:27:32,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 2759 transitions. [2023-08-24 03:27:32,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.402069367531332 [2023-08-24 03:27:32,570 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 2759 transitions. [2023-08-24 03:27:32,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 2759 transitions. [2023-08-24 03:27:32,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:27:32,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 2759 transitions. [2023-08-24 03:27:32,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 58.702127659574465) internal successors, (2759), 47 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:27:32,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:27:32,575 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 146.0) internal successors, (7008), 48 states have internal predecessors, (7008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:27:32,575 INFO L175 Difference]: Start difference. First operand has 762 places, 6526 transitions, 209497 flow. Second operand 47 states and 2759 transitions. [2023-08-24 03:27:32,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 6823 transitions, 232155 flow [2023-08-24 03:28:09,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 780 places, 6823 transitions, 221835 flow, removed 5021 selfloop flow, removed 24 redundant places. [2023-08-24 03:28:10,111 INFO L231 Difference]: Finished difference. Result has 785 places, 6429 transitions, 209048 flow [2023-08-24 03:28:10,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=199977, PETRI_DIFFERENCE_MINUEND_PLACES=734, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3798, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=209048, PETRI_PLACES=785, PETRI_TRANSITIONS=6429} [2023-08-24 03:28:10,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 765 predicate places. [2023-08-24 03:28:10,115 INFO L495 AbstractCegarLoop]: Abstraction has has 785 places, 6429 transitions, 209048 flow [2023-08-24 03:28:10,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:28:10,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:28:10,116 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:28:10,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-24 03:28:10,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-24 03:28:10,316 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:28:10,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:28:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1416048416, now seen corresponding path program 47 times [2023-08-24 03:28:10,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:28:10,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652205019] [2023-08-24 03:28:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:28:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:28:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:28:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:28:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:28:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652205019] [2023-08-24 03:28:10,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652205019] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:28:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41590512] [2023-08-24 03:28:10,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-24 03:28:10,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:28:10,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:28:10,523 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:28:10,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-24 03:28:10,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-24 03:28:10,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:28:10,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-24 03:28:10,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:28:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:28:10,807 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:28:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:28:11,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41590512] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:28:11,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:28:11,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 33 [2023-08-24 03:28:11,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548736642] [2023-08-24 03:28:11,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:28:11,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-24 03:28:11,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:28:11,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-24 03:28:11,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2023-08-24 03:28:11,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:28:11,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 785 places, 6429 transitions, 209048 flow. Second operand has 35 states, 35 states have (on average 56.51428571428571) internal successors, (1978), 35 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:28:11,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:28:11,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:28:11,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:28:56,531 INFO L124 PetriNetUnfolderBase]: 16136/26824 cut-off events. [2023-08-24 03:28:56,531 INFO L125 PetriNetUnfolderBase]: For 1041585/1041585 co-relation queries the response was YES. [2023-08-24 03:28:56,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 402895 conditions, 26824 events. 16136/26824 cut-off events. For 1041585/1041585 co-relation queries the response was YES. Maximal size of possible extension queue 1460. Compared 213094 event pairs, 81 based on Foata normal form. 19/26839 useless extension candidates. Maximal degree in co-relation 402664. Up to 13531 conditions per place. [2023-08-24 03:28:57,111 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 2376 selfloop transitions, 4111 changer transitions 352/6839 dead transitions. [2023-08-24 03:28:57,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 6839 transitions, 236929 flow [2023-08-24 03:28:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-24 03:28:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-24 03:28:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 2824 transitions. [2023-08-24 03:28:57,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4029680365296804 [2023-08-24 03:28:57,114 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 2824 transitions. [2023-08-24 03:28:57,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 2824 transitions. [2023-08-24 03:28:57,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:28:57,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 2824 transitions. [2023-08-24 03:28:57,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 58.833333333333336) internal successors, (2824), 48 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:28:57,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:28:57,119 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 146.0) internal successors, (7154), 49 states have internal predecessors, (7154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:28:57,119 INFO L175 Difference]: Start difference. First operand has 785 places, 6429 transitions, 209048 flow. Second operand 48 states and 2824 transitions. [2023-08-24 03:28:57,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 6839 transitions, 236929 flow [2023-08-24 03:29:30,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 6839 transitions, 234948 flow, removed 349 selfloop flow, removed 36 redundant places. [2023-08-24 03:29:30,318 INFO L231 Difference]: Finished difference. Result has 796 places, 6413 transitions, 219477 flow [2023-08-24 03:29:30,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=207213, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3917, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=219477, PETRI_PLACES=796, PETRI_TRANSITIONS=6413} [2023-08-24 03:29:30,322 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 776 predicate places. [2023-08-24 03:29:30,322 INFO L495 AbstractCegarLoop]: Abstraction has has 796 places, 6413 transitions, 219477 flow [2023-08-24 03:29:30,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 56.51428571428571) internal successors, (1978), 35 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:29:30,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:29:30,322 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:29:30,326 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-08-24 03:29:30,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-24 03:29:30,524 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:29:30,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:29:30,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1925785359, now seen corresponding path program 48 times [2023-08-24 03:29:30,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:29:30,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124634351] [2023-08-24 03:29:30,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:29:30,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:29:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:29:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:29:30,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:29:30,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124634351] [2023-08-24 03:29:30,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124634351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:29:30,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206756542] [2023-08-24 03:29:30,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-24 03:29:30,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:29:30,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:29:30,721 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:29:30,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-24 03:29:30,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-08-24 03:29:30,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:29:30,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 03:29:30,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:29:31,002 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:29:31,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:29:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:29:31,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206756542] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:29:31,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:29:31,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 12] total 35 [2023-08-24 03:29:31,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856259428] [2023-08-24 03:29:31,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:29:31,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-24 03:29:31,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:29:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-24 03:29:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1124, Unknown=0, NotChecked=0, Total=1332 [2023-08-24 03:29:31,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:29:31,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 796 places, 6413 transitions, 219477 flow. Second operand has 37 states, 37 states have (on average 56.486486486486484) internal successors, (2090), 37 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:29:31,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:29:31,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:29:31,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:30:17,785 INFO L124 PetriNetUnfolderBase]: 15420/25796 cut-off events. [2023-08-24 03:30:17,785 INFO L125 PetriNetUnfolderBase]: For 999673/999673 co-relation queries the response was YES. [2023-08-24 03:30:18,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398748 conditions, 25796 events. 15420/25796 cut-off events. For 999673/999673 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 206085 event pairs, 81 based on Foata normal form. 47/25839 useless extension candidates. Maximal degree in co-relation 398519. Up to 12825 conditions per place. [2023-08-24 03:30:18,272 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 1766 selfloop transitions, 44 changer transitions 5188/6998 dead transitions. [2023-08-24 03:30:18,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 6998 transitions, 256130 flow [2023-08-24 03:30:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-24 03:30:18,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-24 03:30:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2581 transitions. [2023-08-24 03:30:18,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40177459526774595 [2023-08-24 03:30:18,274 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2581 transitions. [2023-08-24 03:30:18,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2581 transitions. [2023-08-24 03:30:18,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:30:18,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2581 transitions. [2023-08-24 03:30:18,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 58.65909090909091) internal successors, (2581), 44 states have internal predecessors, (2581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:30:18,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:30:18,279 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 146.0) internal successors, (6570), 45 states have internal predecessors, (6570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:30:18,279 INFO L175 Difference]: Start difference. First operand has 796 places, 6413 transitions, 219477 flow. Second operand 44 states and 2581 transitions. [2023-08-24 03:30:18,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 6998 transitions, 256130 flow [2023-08-24 03:30:54,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 6998 transitions, 246250 flow, removed 3706 selfloop flow, removed 42 redundant places. [2023-08-24 03:30:54,122 INFO L231 Difference]: Finished difference. Result has 781 places, 1795 transitions, 42360 flow [2023-08-24 03:30:54,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=211450, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=42360, PETRI_PLACES=781, PETRI_TRANSITIONS=1795} [2023-08-24 03:30:54,125 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 761 predicate places. [2023-08-24 03:30:54,125 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 1795 transitions, 42360 flow [2023-08-24 03:30:54,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 56.486486486486484) internal successors, (2090), 37 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:30:54,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:30:54,125 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:30:54,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-08-24 03:30:54,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-24 03:30:54,329 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:30:54,329 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:30:54,329 INFO L85 PathProgramCache]: Analyzing trace with hash -181016459, now seen corresponding path program 49 times [2023-08-24 03:30:54,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:30:54,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111138065] [2023-08-24 03:30:54,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:30:54,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:30:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:30:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-24 03:30:54,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:30:54,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111138065] [2023-08-24 03:30:54,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111138065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:30:54,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734527643] [2023-08-24 03:30:54,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-24 03:30:54,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:30:54,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:30:54,520 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:30:54,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-24 03:30:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:30:54,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-24 03:30:54,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:30:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:30:54,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:30:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:30:55,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734527643] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:30:55,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:30:55,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 12] total 34 [2023-08-24 03:30:55,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001094830] [2023-08-24 03:30:55,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:30:55,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-24 03:30:55,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:30:55,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-24 03:30:55,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2023-08-24 03:30:55,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:30:55,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 1795 transitions, 42360 flow. Second operand has 36 states, 36 states have (on average 56.5) internal successors, (2034), 36 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:30:55,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:30:55,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:30:55,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:00,422 INFO L124 PetriNetUnfolderBase]: 5269/8662 cut-off events. [2023-08-24 03:31:00,422 INFO L125 PetriNetUnfolderBase]: For 299688/299688 co-relation queries the response was YES. [2023-08-24 03:31:00,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109301 conditions, 8662 events. 5269/8662 cut-off events. For 299688/299688 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 56995 event pairs, 0 based on Foata normal form. 36/8694 useless extension candidates. Maximal degree in co-relation 109088. Up to 4531 conditions per place. [2023-08-24 03:31:00,563 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 302 selfloop transitions, 1610 changer transitions 216/2128 dead transitions. [2023-08-24 03:31:00,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 2128 transitions, 54044 flow [2023-08-24 03:31:00,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-24 03:31:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-24 03:31:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2630 transitions. [2023-08-24 03:31:00,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4003044140030441 [2023-08-24 03:31:00,565 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2630 transitions. [2023-08-24 03:31:00,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2630 transitions. [2023-08-24 03:31:00,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:00,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2630 transitions. [2023-08-24 03:31:00,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 58.44444444444444) internal successors, (2630), 45 states have internal predecessors, (2630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:00,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 146.0) internal successors, (6716), 46 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:00,570 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 146.0) internal successors, (6716), 46 states have internal predecessors, (6716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:00,570 INFO L175 Difference]: Start difference. First operand has 781 places, 1795 transitions, 42360 flow. Second operand 45 states and 2630 transitions. [2023-08-24 03:31:00,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 2128 transitions, 54044 flow [2023-08-24 03:31:05,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 2128 transitions, 48848 flow, removed 2270 selfloop flow, removed 87 redundant places. [2023-08-24 03:31:05,221 INFO L231 Difference]: Finished difference. Result has 402 places, 1845 transitions, 44193 flow [2023-08-24 03:31:05,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=38369, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=44193, PETRI_PLACES=402, PETRI_TRANSITIONS=1845} [2023-08-24 03:31:05,222 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-08-24 03:31:05,222 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1845 transitions, 44193 flow [2023-08-24 03:31:05,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 56.5) internal successors, (2034), 36 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:05,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:05,222 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:31:05,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-24 03:31:05,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-24 03:31:05,425 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:31:05,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:05,425 INFO L85 PathProgramCache]: Analyzing trace with hash -584291977, now seen corresponding path program 50 times [2023-08-24 03:31:05,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:05,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874649945] [2023-08-24 03:31:05,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:05,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:05,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:05,639 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:05,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:05,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874649945] [2023-08-24 03:31:05,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874649945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:31:05,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308800273] [2023-08-24 03:31:05,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-24 03:31:05,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:05,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:05,640 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:31:05,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-24 03:31:05,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-24 03:31:05,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:31:05,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:31:05,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:31:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:05,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:31:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:06,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308800273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:31:06,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:31:06,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 13] total 37 [2023-08-24 03:31:06,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184128420] [2023-08-24 03:31:06,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:31:06,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:31:06,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:06,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:31:06,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=1194, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 03:31:06,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:31:06,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1845 transitions, 44193 flow. Second operand has 39 states, 39 states have (on average 56.46153846153846) internal successors, (2202), 39 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:06,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:06,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:31:06,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:12,010 INFO L124 PetriNetUnfolderBase]: 6984/11487 cut-off events. [2023-08-24 03:31:12,010 INFO L125 PetriNetUnfolderBase]: For 230206/230206 co-relation queries the response was YES. [2023-08-24 03:31:12,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136226 conditions, 11487 events. 6984/11487 cut-off events. For 230206/230206 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 79624 event pairs, 8 based on Foata normal form. 24/11507 useless extension candidates. Maximal degree in co-relation 136054. Up to 6477 conditions per place. [2023-08-24 03:31:12,173 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 192 selfloop transitions, 1854 changer transitions 1012/3058 dead transitions. [2023-08-24 03:31:12,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 3058 transitions, 78757 flow [2023-08-24 03:31:12,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-24 03:31:12,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-24 03:31:12,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2391 transitions. [2023-08-24 03:31:12,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994320080187103 [2023-08-24 03:31:12,176 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2391 transitions. [2023-08-24 03:31:12,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2391 transitions. [2023-08-24 03:31:12,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:12,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2391 transitions. [2023-08-24 03:31:12,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 58.31707317073171) internal successors, (2391), 41 states have internal predecessors, (2391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:12,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 146.0) internal successors, (6132), 42 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:12,181 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 146.0) internal successors, (6132), 42 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:12,181 INFO L175 Difference]: Start difference. First operand has 402 places, 1845 transitions, 44193 flow. Second operand 41 states and 2391 transitions. [2023-08-24 03:31:12,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 3058 transitions, 78757 flow [2023-08-24 03:31:18,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 3058 transitions, 76658 flow, removed 787 selfloop flow, removed 31 redundant places. [2023-08-24 03:31:18,183 INFO L231 Difference]: Finished difference. Result has 405 places, 2013 transitions, 55156 flow [2023-08-24 03:31:18,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=43144, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1282, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=55156, PETRI_PLACES=405, PETRI_TRANSITIONS=2013} [2023-08-24 03:31:18,184 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2023-08-24 03:31:18,184 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 2013 transitions, 55156 flow [2023-08-24 03:31:18,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 56.46153846153846) internal successors, (2202), 39 states have internal predecessors, (2202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:18,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-24 03:31:18,184 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-24 03:31:18,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-08-24 03:31:18,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:18,385 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-24 03:31:18,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-24 03:31:18,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1014447785, now seen corresponding path program 51 times [2023-08-24 03:31:18,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-24 03:31:18,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367020408] [2023-08-24 03:31:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-24 03:31:18,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-24 03:31:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-24 03:31:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-24 03:31:18,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-24 03:31:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367020408] [2023-08-24 03:31:18,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367020408] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-24 03:31:18,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306401473] [2023-08-24 03:31:18,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-24 03:31:18,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-24 03:31:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-24 03:31:18,588 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-24 03:31:18,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-24 03:31:18,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-24 03:31:18,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-24 03:31:18,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-24 03:31:18,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-24 03:31:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:18,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-24 03:31:19,263 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-24 03:31:19,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306401473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-24 03:31:19,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-24 03:31:19,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 37 [2023-08-24 03:31:19,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907559293] [2023-08-24 03:31:19,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-24 03:31:19,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-24 03:31:19,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-24 03:31:19,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-24 03:31:19,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1204, Unknown=0, NotChecked=0, Total=1482 [2023-08-24 03:31:19,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 146 [2023-08-24 03:31:19,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 2013 transitions, 55156 flow. Second operand has 39 states, 39 states have (on average 56.48717948717949) internal successors, (2203), 39 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:19,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-24 03:31:19,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 146 [2023-08-24 03:31:19,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-24 03:31:25,770 INFO L124 PetriNetUnfolderBase]: 6555/10723 cut-off events. [2023-08-24 03:31:25,770 INFO L125 PetriNetUnfolderBase]: For 227376/227376 co-relation queries the response was YES. [2023-08-24 03:31:25,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146053 conditions, 10723 events. 6555/10723 cut-off events. For 227376/227376 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 72657 event pairs, 0 based on Foata normal form. 3/10722 useless extension candidates. Maximal degree in co-relation 145882. Up to 6037 conditions per place. [2023-08-24 03:31:25,902 INFO L140 encePairwiseOnDemand]: 138/146 looper letters, 0 selfloop transitions, 0 changer transitions 2883/2883 dead transitions. [2023-08-24 03:31:25,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 2883 transitions, 83326 flow [2023-08-24 03:31:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-24 03:31:25,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-24 03:31:25,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 3270 transitions. [2023-08-24 03:31:25,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39995107632093935 [2023-08-24 03:31:25,904 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 3270 transitions. [2023-08-24 03:31:25,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 3270 transitions. [2023-08-24 03:31:25,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-24 03:31:25,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 3270 transitions. [2023-08-24 03:31:25,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 58.392857142857146) internal successors, (3270), 56 states have internal predecessors, (3270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:25,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 146.0) internal successors, (8322), 57 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:25,911 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 146.0) internal successors, (8322), 57 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:25,911 INFO L175 Difference]: Start difference. First operand has 405 places, 2013 transitions, 55156 flow. Second operand 56 states and 3270 transitions. [2023-08-24 03:31:25,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 2883 transitions, 83326 flow [2023-08-24 03:31:31,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 2883 transitions, 78736 flow, removed 1738 selfloop flow, removed 26 redundant places. [2023-08-24 03:31:31,572 INFO L231 Difference]: Finished difference. Result has 408 places, 0 transitions, 0 flow [2023-08-24 03:31:31,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=51895, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2012, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=0, PETRI_PLACES=408, PETRI_TRANSITIONS=0} [2023-08-24 03:31:31,572 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 388 predicate places. [2023-08-24 03:31:31,572 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 0 transitions, 0 flow [2023-08-24 03:31:31,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 56.48717948717949) internal successors, (2203), 39 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-24 03:31:31,574 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-24 03:31:31,575 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-24 03:31:31,575 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-24 03:31:31,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-24 03:31:31,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-24 03:31:31,775 INFO L445 BasicCegarLoop]: Path program histogram: [51, 1, 1] [2023-08-24 03:31:31,777 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-24 03:31:31,777 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-24 03:31:31,779 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.08 03:31:31 BasicIcfg [2023-08-24 03:31:31,779 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-24 03:31:31,779 INFO L158 Benchmark]: Toolchain (without parser) took 709663.18ms. Allocated memory was 377.5MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 353.6MB in the beginning and 3.7GB in the end (delta: -3.3GB). Peak memory consumption was 3.5GB. Max. memory is 16.0GB. [2023-08-24 03:31:31,779 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 377.5MB. Free memory is still 353.7MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-24 03:31:31,779 INFO L158 Benchmark]: CACSL2BoogieTranslator took 183.96ms. Allocated memory is still 377.5MB. Free memory was 353.1MB in the beginning and 342.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-24 03:31:31,780 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.35ms. Allocated memory is still 377.5MB. Free memory was 342.4MB in the beginning and 340.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 03:31:31,780 INFO L158 Benchmark]: Boogie Preprocessor took 28.18ms. Allocated memory is still 377.5MB. Free memory was 340.7MB in the beginning and 339.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-24 03:31:31,780 INFO L158 Benchmark]: RCFGBuilder took 234.62ms. Allocated memory is still 377.5MB. Free memory was 339.2MB in the beginning and 325.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-24 03:31:31,780 INFO L158 Benchmark]: TraceAbstraction took 709185.07ms. Allocated memory was 377.5MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 324.1MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. [2023-08-24 03:31:31,781 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 377.5MB. Free memory is still 353.7MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 183.96ms. Allocated memory is still 377.5MB. Free memory was 353.1MB in the beginning and 342.4MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 26.35ms. Allocated memory is still 377.5MB. Free memory was 342.4MB in the beginning and 340.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.18ms. Allocated memory is still 377.5MB. Free memory was 340.7MB in the beginning and 339.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 234.62ms. Allocated memory is still 377.5MB. Free memory was 339.2MB in the beginning and 325.1MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 709185.07ms. Allocated memory was 377.5MB in the beginning and 6.2GB in the end (delta: 5.8GB). Free memory was 324.1MB in the beginning and 3.7GB in the end (delta: -3.4GB). Peak memory consumption was 3.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.9s, 73 PlacesBefore, 20 PlacesAfterwards, 72 TransitionsBefore, 15 TransitionsAfterwards, 436 CoEnabledTransitionPairs, 7 FixpointIterations, 37 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 494 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 480, independent: 478, independent conditional: 0, independent unconditional: 478, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 229, independent: 227, independent conditional: 0, independent unconditional: 227, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 480, independent: 251, independent conditional: 0, independent unconditional: 251, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 229, unknown conditional: 0, unknown unconditional: 229] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 709.1s, OverallIterations: 53, TraceHistogramMax: 7, PathProgramHistogramMax: 51, EmptinessCheckTime: 0.0s, AutomataDifference: 664.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5207 SdHoareTripleChecker+Valid, 18.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5207 mSDsluCounter, 994 SdHoareTripleChecker+Invalid, 15.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 749 mSDsCounter, 2425 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45741 IncrementalHoareTripleChecker+Invalid, 48166 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2425 mSolverCounterUnsat, 245 mSDtfsCounter, 45741 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3581 GetRequests, 872 SyntacticMatches, 65 SemanticMatches, 2644 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47841 ImplicationChecksByTransitivity, 43.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=219477occurred in iteration=49, InterpolantAutomatonStates: 1917, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 28.0s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1843 NumberOfCodeBlocksAsserted, 181 NumberOfCheckSat, 2601 ConstructedInterpolants, 0 QuantifiedInterpolants, 31744 SizeOfPredicates, 268 NumberOfNonLiveVariables, 6709 ConjunctsInSsa, 1429 ConjunctsInUnsatCore, 157 InterpolantComputations, 1 PerfectInterpolantSequences, 78/1518 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-24 03:31:31,798 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...