/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -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-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:14:10,324 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:14:10,410 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-SemanticLbe.epf [2023-11-17 12:14:10,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:14:10,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:14:10,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:14:10,444 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:14:10,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:14:10,445 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:14:10,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:14:10,449 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:14:10,449 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:14:10,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:14:10,450 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:14:10,451 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:14:10,451 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:14:10,451 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:14:10,451 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:14:10,452 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:14:10,452 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:14:10,452 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:14:10,453 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:14:10,453 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:14:10,453 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:14:10,454 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:14:10,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:14:10,455 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:14:10,455 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:14:10,455 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:14:10,456 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:14:10,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:14:10,457 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:14:10,457 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:14:10,694 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:14:10,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:14:10,722 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:14:10,723 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:14:10,723 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:14:10,724 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2023-11-17 12:14:11,861 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:14:12,073 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:14:12,074 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-counter-determinism.wvr.c [2023-11-17 12:14:12,081 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad461d1db/8b2770e922a845e2824c7b4341b43c9d/FLAGfbdcc36ae [2023-11-17 12:14:12,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad461d1db/8b2770e922a845e2824c7b4341b43c9d [2023-11-17 12:14:12,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:14:12,106 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:14:12,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:14:12,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:14:12,113 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:14:12,113 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,115 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ff5f21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12, skipping insertion in model container [2023-11-17 12:14:12,115 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,141 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:14:12,279 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-counter-determinism.wvr.c[2528,2541] [2023-11-17 12:14:12,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:14:12,290 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:14:12,312 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-counter-determinism.wvr.c[2528,2541] [2023-11-17 12:14:12,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:14:12,324 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:14:12,324 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 12:14:12,329 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:14:12,329 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12 WrapperNode [2023-11-17 12:14:12,329 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:14:12,330 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:14:12,330 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:14:12,331 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:14:12,336 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,342 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,363 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 120 [2023-11-17 12:14:12,364 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:14:12,364 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:14:12,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:14:12,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:14:12,371 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,371 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,373 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,374 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,379 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,383 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,384 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,385 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,388 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:14:12,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:14:12,389 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:14:12,389 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:14:12,389 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (1/1) ... [2023-11-17 12:14:12,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:14:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:12,430 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) [2023-11-17 12:14:12,457 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 [2023-11-17 12:14:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:14:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:14:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:14:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:14:12,468 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 12:14:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-11-17 12:14:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 12:14:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:14:12,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:14:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:14:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:14:12,472 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:14:12,602 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:14:12,606 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:14:12,849 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:14:13,046 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:14:13,046 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 12:14:13,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:14:13 BoogieIcfgContainer [2023-11-17 12:14:13,048 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:14:13,050 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:14:13,050 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:14:13,053 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:14:13,053 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:14:12" (1/3) ... [2023-11-17 12:14:13,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779b33d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:14:13, skipping insertion in model container [2023-11-17 12:14:13,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:14:12" (2/3) ... [2023-11-17 12:14:13,054 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@779b33d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:14:13, skipping insertion in model container [2023-11-17 12:14:13,054 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:14:13" (3/3) ... [2023-11-17 12:14:13,055 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-determinism.wvr.c [2023-11-17 12:14:13,068 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:14:13,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:14:13,068 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:14:13,118 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 12:14:13,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 43 transitions, 114 flow [2023-11-17 12:14:13,180 INFO L124 PetriNetUnfolderBase]: 4/39 cut-off events. [2023-11-17 12:14:13,180 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:14:13,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 39 events. 4/39 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 12:14:13,186 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 43 transitions, 114 flow [2023-11-17 12:14:13,193 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 47 places, 38 transitions, 100 flow [2023-11-17 12:14:13,196 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:14:13,205 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 47 places, 38 transitions, 100 flow [2023-11-17 12:14:13,208 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 47 places, 38 transitions, 100 flow [2023-11-17 12:14:13,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 38 transitions, 100 flow [2023-11-17 12:14:13,225 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2023-11-17 12:14:13,225 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:14:13,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 38 events. 4/38 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2023-11-17 12:14:13,226 INFO L119 LiptonReduction]: Number of co-enabled transitions 580 [2023-11-17 12:14:13,546 INFO L134 LiptonReduction]: Checked pairs total: 622 [2023-11-17 12:14:13,546 INFO L136 LiptonReduction]: Total number of compositions: 9 [2023-11-17 12:14:13,574 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:14:13,582 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=LoopHeads, 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;@54b83265, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:14:13,582 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-17 12:14:13,603 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:14:13,604 INFO L124 PetriNetUnfolderBase]: 4/28 cut-off events. [2023-11-17 12:14:13,604 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 12:14:13,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:13,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:13,605 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:13,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -815507116, now seen corresponding path program 1 times [2023-11-17 12:14:13,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:13,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330172612] [2023-11-17 12:14:13,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:13,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:14,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330172612] [2023-11-17 12:14:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330172612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:14,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:14,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 12:14:14,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775070237] [2023-11-17 12:14:14,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:14,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:14:14,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:14,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:14:14,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:14:14,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2023-11-17 12:14:14,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:14,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2023-11-17 12:14:14,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:14,378 INFO L124 PetriNetUnfolderBase]: 1932/2564 cut-off events. [2023-11-17 12:14:14,378 INFO L125 PetriNetUnfolderBase]: For 237/237 co-relation queries the response was YES. [2023-11-17 12:14:14,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5366 conditions, 2564 events. 1932/2564 cut-off events. For 237/237 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8785 event pairs, 624 based on Foata normal form. 1/1861 useless extension candidates. Maximal degree in co-relation 4140. Up to 1621 conditions per place. [2023-11-17 12:14:14,400 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 49 selfloop transitions, 5 changer transitions 1/55 dead transitions. [2023-11-17 12:14:14,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 55 transitions, 265 flow [2023-11-17 12:14:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:14:14,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:14:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2023-11-17 12:14:14,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532051282051282 [2023-11-17 12:14:14,413 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2023-11-17 12:14:14,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2023-11-17 12:14:14,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:14,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2023-11-17 12:14:14,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,427 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 82 flow. Second operand 3 states and 83 transitions. [2023-11-17 12:14:14,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 55 transitions, 265 flow [2023-11-17 12:14:14,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 55 transitions, 235 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-11-17 12:14:14,480 INFO L231 Difference]: Finished difference. Result has 33 places, 33 transitions, 99 flow [2023-11-17 12:14:14,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=99, PETRI_PLACES=33, PETRI_TRANSITIONS=33} [2023-11-17 12:14:14,487 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2023-11-17 12:14:14,487 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 33 transitions, 99 flow [2023-11-17 12:14:14,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:14,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:14,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:14:14,488 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:14,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:14,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1345990423, now seen corresponding path program 1 times [2023-11-17 12:14:14,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:14,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269720570] [2023-11-17 12:14:14,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:14,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:14,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:14,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:14,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269720570] [2023-11-17 12:14:14,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269720570] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:14,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:14,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:14:14,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101044705] [2023-11-17 12:14:14,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:14,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:14:14,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:14,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:14:14,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:14:14,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2023-11-17 12:14:14,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 33 transitions, 99 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:14,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2023-11-17 12:14:14,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:14,920 INFO L124 PetriNetUnfolderBase]: 2334/3146 cut-off events. [2023-11-17 12:14:14,920 INFO L125 PetriNetUnfolderBase]: For 703/703 co-relation queries the response was YES. [2023-11-17 12:14:14,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7457 conditions, 3146 events. 2334/3146 cut-off events. For 703/703 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11377 event pairs, 1228 based on Foata normal form. 154/3300 useless extension candidates. Maximal degree in co-relation 2032. Up to 2138 conditions per place. [2023-11-17 12:14:14,939 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 50 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-11-17 12:14:14,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 53 transitions, 255 flow [2023-11-17 12:14:14,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:14:14,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:14:14,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2023-11-17 12:14:14,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:14:14,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 78 transitions. [2023-11-17 12:14:14,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 78 transitions. [2023-11-17 12:14:14,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:14,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 78 transitions. [2023-11-17 12:14:14,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,947 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,947 INFO L175 Difference]: Start difference. First operand has 33 places, 33 transitions, 99 flow. Second operand 3 states and 78 transitions. [2023-11-17 12:14:14,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 53 transitions, 255 flow [2023-11-17 12:14:14,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 53 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:14,950 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 107 flow [2023-11-17 12:14:14,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=107, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-11-17 12:14:14,951 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-11-17 12:14:14,951 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 107 flow [2023-11-17 12:14:14,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:14,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:14,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:14,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:14:14,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:14,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:14,960 INFO L85 PathProgramCache]: Analyzing trace with hash -347075886, now seen corresponding path program 1 times [2023-11-17 12:14:14,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:14,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780841289] [2023-11-17 12:14:14,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:14,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:15,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:15,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:15,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780841289] [2023-11-17 12:14:15,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780841289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:15,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347911031] [2023-11-17 12:14:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:15,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:15,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:15,108 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) [2023-11-17 12:14:15,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:14:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:15,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:15,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:15,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:15,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347911031] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:15,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:15,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:14:15,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330273305] [2023-11-17 12:14:15,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:14:15,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:15,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:14:15,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:14:15,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:15,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 107 flow. Second operand has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:15,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:15,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:15,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:15,984 INFO L124 PetriNetUnfolderBase]: 3592/4836 cut-off events. [2023-11-17 12:14:15,985 INFO L125 PetriNetUnfolderBase]: For 1865/1865 co-relation queries the response was YES. [2023-11-17 12:14:15,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12009 conditions, 4836 events. 3592/4836 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 19559 event pairs, 1107 based on Foata normal form. 114/4950 useless extension candidates. Maximal degree in co-relation 6576. Up to 1944 conditions per place. [2023-11-17 12:14:16,006 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 116 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2023-11-17 12:14:16,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 126 transitions, 651 flow [2023-11-17 12:14:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:14:16,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:14:16,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2023-11-17 12:14:16,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2023-11-17 12:14:16,009 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 152 transitions. [2023-11-17 12:14:16,009 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 152 transitions. [2023-11-17 12:14:16,009 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:16,009 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 152 transitions. [2023-11-17 12:14:16,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,011 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,011 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 107 flow. Second operand 7 states and 152 transitions. [2023-11-17 12:14:16,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 126 transitions, 651 flow [2023-11-17 12:14:16,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 126 transitions, 642 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:16,015 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 176 flow [2023-11-17 12:14:16,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=176, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2023-11-17 12:14:16,015 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2023-11-17 12:14:16,016 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 176 flow [2023-11-17 12:14:16,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.375) internal successors, (75), 8 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:16,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:16,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:16,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:16,223 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:16,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:16,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1774475925, now seen corresponding path program 1 times [2023-11-17 12:14:16,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:16,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856983318] [2023-11-17 12:14:16,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:16,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:16,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:16,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856983318] [2023-11-17 12:14:16,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856983318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:16,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:16,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 12:14:16,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59521476] [2023-11-17 12:14:16,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 12:14:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:16,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 12:14:16,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 12:14:16,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2023-11-17 12:14:16,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:16,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2023-11-17 12:14:16,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:16,608 INFO L124 PetriNetUnfolderBase]: 2832/3858 cut-off events. [2023-11-17 12:14:16,609 INFO L125 PetriNetUnfolderBase]: For 5587/5587 co-relation queries the response was YES. [2023-11-17 12:14:16,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12027 conditions, 3858 events. 2832/3858 cut-off events. For 5587/5587 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15088 event pairs, 1256 based on Foata normal form. 156/4014 useless extension candidates. Maximal degree in co-relation 6532. Up to 2103 conditions per place. [2023-11-17 12:14:16,634 INFO L140 encePairwiseOnDemand]: 49/52 looper letters, 58 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-11-17 12:14:16,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 359 flow [2023-11-17 12:14:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 12:14:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 12:14:16,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2023-11-17 12:14:16,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256410256410257 [2023-11-17 12:14:16,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 82 transitions. [2023-11-17 12:14:16,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 82 transitions. [2023-11-17 12:14:16,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:16,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 82 transitions. [2023-11-17 12:14:16,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,638 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 52.0) internal successors, (208), 4 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,638 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 176 flow. Second operand 3 states and 82 transitions. [2023-11-17 12:14:16,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 359 flow [2023-11-17 12:14:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 349 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:16,655 INFO L231 Difference]: Finished difference. Result has 47 places, 39 transitions, 173 flow [2023-11-17 12:14:16,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=39} [2023-11-17 12:14:16,657 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 9 predicate places. [2023-11-17 12:14:16,657 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 39 transitions, 173 flow [2023-11-17 12:14:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:16,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:16,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:14:16,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:16,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 502355354, now seen corresponding path program 2 times [2023-11-17 12:14:16,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:16,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683639875] [2023-11-17 12:14:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:16,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:16,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:16,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:16,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683639875] [2023-11-17 12:14:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683639875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:16,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426065976] [2023-11-17 12:14:16,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:16,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:16,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:16,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 39 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:16,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:16,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:16,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:17,158 INFO L124 PetriNetUnfolderBase]: 3098/4208 cut-off events. [2023-11-17 12:14:17,158 INFO L125 PetriNetUnfolderBase]: For 6308/6308 co-relation queries the response was YES. [2023-11-17 12:14:17,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13157 conditions, 4208 events. 3098/4208 cut-off events. For 6308/6308 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16600 event pairs, 1723 based on Foata normal form. 42/4250 useless extension candidates. Maximal degree in co-relation 7067. Up to 3498 conditions per place. [2023-11-17 12:14:17,183 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 74 selfloop transitions, 10 changer transitions 0/84 dead transitions. [2023-11-17 12:14:17,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 84 transitions, 504 flow [2023-11-17 12:14:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:17,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:17,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2023-11-17 12:14:17,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2023-11-17 12:14:17,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 98 transitions. [2023-11-17 12:14:17,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 98 transitions. [2023-11-17 12:14:17,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:17,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 98 transitions. [2023-11-17 12:14:17,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:17,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:17,188 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:17,188 INFO L175 Difference]: Start difference. First operand has 47 places, 39 transitions, 173 flow. Second operand 5 states and 98 transitions. [2023-11-17 12:14:17,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 84 transitions, 504 flow [2023-11-17 12:14:17,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 494 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:17,200 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 235 flow [2023-11-17 12:14:17,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2023-11-17 12:14:17,203 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2023-11-17 12:14:17,203 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 235 flow [2023-11-17 12:14:17,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:17,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:17,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:17,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 12:14:17,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:17,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:17,204 INFO L85 PathProgramCache]: Analyzing trace with hash -705303098, now seen corresponding path program 3 times [2023-11-17 12:14:17,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:17,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684314298] [2023-11-17 12:14:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:17,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:17,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684314298] [2023-11-17 12:14:17,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684314298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:17,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397025345] [2023-11-17 12:14:17,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:14:17,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:17,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:17,289 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) [2023-11-17 12:14:17,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:14:17,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:14:17,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:17,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:17,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:17,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:17,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:17,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397025345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:17,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:17,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:17,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626153550] [2023-11-17 12:14:17,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:17,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:17,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:17,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:17,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:17,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:17,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 235 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:17,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:17,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:17,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:18,003 INFO L124 PetriNetUnfolderBase]: 3912/5250 cut-off events. [2023-11-17 12:14:18,003 INFO L125 PetriNetUnfolderBase]: For 11249/11249 co-relation queries the response was YES. [2023-11-17 12:14:18,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18312 conditions, 5250 events. 3912/5250 cut-off events. For 11249/11249 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 21307 event pairs, 1386 based on Foata normal form. 114/5364 useless extension candidates. Maximal degree in co-relation 10010. Up to 3273 conditions per place. [2023-11-17 12:14:18,027 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 94 selfloop transitions, 17 changer transitions 0/111 dead transitions. [2023-11-17 12:14:18,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 111 transitions, 729 flow [2023-11-17 12:14:18,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 12:14:18,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 12:14:18,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2023-11-17 12:14:18,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38782051282051283 [2023-11-17 12:14:18,029 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 121 transitions. [2023-11-17 12:14:18,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 121 transitions. [2023-11-17 12:14:18,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:18,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 121 transitions. [2023-11-17 12:14:18,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,031 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 52.0) internal successors, (364), 7 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,031 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 235 flow. Second operand 6 states and 121 transitions. [2023-11-17 12:14:18,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 111 transitions, 729 flow [2023-11-17 12:14:18,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 111 transitions, 697 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:18,069 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 357 flow [2023-11-17 12:14:18,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=357, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2023-11-17 12:14:18,070 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 19 predicate places. [2023-11-17 12:14:18,070 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 357 flow [2023-11-17 12:14:18,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:18,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:18,079 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-17 12:14:18,279 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,SelfDestructingSolverStorable5 [2023-11-17 12:14:18,280 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:18,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash 289419718, now seen corresponding path program 4 times [2023-11-17 12:14:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190913861] [2023-11-17 12:14:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:18,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:18,364 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:18,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:18,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190913861] [2023-11-17 12:14:18,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190913861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:18,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:18,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:18,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076820265] [2023-11-17 12:14:18,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:18,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:18,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:18,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:18,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 357 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:18,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:18,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:18,865 INFO L124 PetriNetUnfolderBase]: 4303/5843 cut-off events. [2023-11-17 12:14:18,865 INFO L125 PetriNetUnfolderBase]: For 15517/15517 co-relation queries the response was YES. [2023-11-17 12:14:18,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21865 conditions, 5843 events. 4303/5843 cut-off events. For 15517/15517 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 25283 event pairs, 1018 based on Foata normal form. 42/5885 useless extension candidates. Maximal degree in co-relation 12640. Up to 2236 conditions per place. [2023-11-17 12:14:18,898 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 98 selfloop transitions, 14 changer transitions 0/112 dead transitions. [2023-11-17 12:14:18,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 112 transitions, 803 flow [2023-11-17 12:14:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:18,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2023-11-17 12:14:18,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115384615384615 [2023-11-17 12:14:18,899 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2023-11-17 12:14:18,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2023-11-17 12:14:18,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:18,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2023-11-17 12:14:18,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,901 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,901 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 357 flow. Second operand 5 states and 107 transitions. [2023-11-17 12:14:18,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 112 transitions, 803 flow [2023-11-17 12:14:18,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 112 transitions, 769 flow, removed 17 selfloop flow, removed 0 redundant places. [2023-11-17 12:14:18,995 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 380 flow [2023-11-17 12:14:18,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=380, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2023-11-17 12:14:18,996 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-11-17 12:14:18,996 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 380 flow [2023-11-17 12:14:18,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:18,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:18,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:18,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:14:18,997 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:18,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:18,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1532439068, now seen corresponding path program 1 times [2023-11-17 12:14:18,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:18,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403913764] [2023-11-17 12:14:18,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:18,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:19,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:19,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403913764] [2023-11-17 12:14:19,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403913764] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:19,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:19,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:19,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093833462] [2023-11-17 12:14:19,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:19,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:19,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:19,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:19,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:19,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:19,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:19,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:19,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:19,639 INFO L124 PetriNetUnfolderBase]: 4398/5986 cut-off events. [2023-11-17 12:14:19,639 INFO L125 PetriNetUnfolderBase]: For 19222/19222 co-relation queries the response was YES. [2023-11-17 12:14:19,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22353 conditions, 5986 events. 4398/5986 cut-off events. For 19222/19222 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25464 event pairs, 1904 based on Foata normal form. 48/6034 useless extension candidates. Maximal degree in co-relation 14878. Up to 4008 conditions per place. [2023-11-17 12:14:19,674 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 76 selfloop transitions, 14 changer transitions 17/107 dead transitions. [2023-11-17 12:14:19,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 107 transitions, 779 flow [2023-11-17 12:14:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:19,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2023-11-17 12:14:19,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115384615384615 [2023-11-17 12:14:19,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 107 transitions. [2023-11-17 12:14:19,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 107 transitions. [2023-11-17 12:14:19,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:19,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 107 transitions. [2023-11-17 12:14:19,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:19,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:19,678 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:19,678 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 380 flow. Second operand 5 states and 107 transitions. [2023-11-17 12:14:19,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 107 transitions, 779 flow [2023-11-17 12:14:19,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 107 transitions, 748 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:19,724 INFO L231 Difference]: Finished difference. Result has 67 places, 57 transitions, 394 flow [2023-11-17 12:14:19,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=394, PETRI_PLACES=67, PETRI_TRANSITIONS=57} [2023-11-17 12:14:19,726 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 29 predicate places. [2023-11-17 12:14:19,726 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 57 transitions, 394 flow [2023-11-17 12:14:19,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:19,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:19,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:19,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 12:14:19,728 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:19,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1352594536, now seen corresponding path program 2 times [2023-11-17 12:14:19,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:19,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203584485] [2023-11-17 12:14:19,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:19,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203584485] [2023-11-17 12:14:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203584485] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812533089] [2023-11-17 12:14:19,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:14:19,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:19,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:19,817 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) [2023-11-17 12:14:19,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:14:19,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:19,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:19,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:19,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:19,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:19,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:19,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812533089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:19,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:19,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:14:19,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766625210] [2023-11-17 12:14:19,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:19,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:14:19,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:14:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:14:19,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:19,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 57 transitions, 394 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:19,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:19,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:19,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:20,574 INFO L124 PetriNetUnfolderBase]: 4749/6451 cut-off events. [2023-11-17 12:14:20,574 INFO L125 PetriNetUnfolderBase]: For 21996/21996 co-relation queries the response was YES. [2023-11-17 12:14:20,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25308 conditions, 6451 events. 4749/6451 cut-off events. For 21996/21996 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 27990 event pairs, 961 based on Foata normal form. 162/6613 useless extension candidates. Maximal degree in co-relation 17884. Up to 2096 conditions per place. [2023-11-17 12:14:20,613 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 233 selfloop transitions, 10 changer transitions 5/248 dead transitions. [2023-11-17 12:14:20,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 248 transitions, 2333 flow [2023-11-17 12:14:20,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:14:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:14:20,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2023-11-17 12:14:20,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010989010989011 [2023-11-17 12:14:20,614 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 146 transitions. [2023-11-17 12:14:20,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 146 transitions. [2023-11-17 12:14:20,615 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:20,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 146 transitions. [2023-11-17 12:14:20,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 20.857142857142858) internal successors, (146), 7 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:20,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:20,616 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:20,616 INFO L175 Difference]: Start difference. First operand has 67 places, 57 transitions, 394 flow. Second operand 7 states and 146 transitions. [2023-11-17 12:14:20,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 248 transitions, 2333 flow [2023-11-17 12:14:20,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 248 transitions, 2223 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:20,693 INFO L231 Difference]: Finished difference. Result has 73 places, 63 transitions, 433 flow [2023-11-17 12:14:20,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=367, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=433, PETRI_PLACES=73, PETRI_TRANSITIONS=63} [2023-11-17 12:14:20,694 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 35 predicate places. [2023-11-17 12:14:20,694 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 63 transitions, 433 flow [2023-11-17 12:14:20,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:20,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:20,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:20,705 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-17 12:14:20,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:20,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:20,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:20,901 INFO L85 PathProgramCache]: Analyzing trace with hash -27531466, now seen corresponding path program 5 times [2023-11-17 12:14:20,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:20,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024141867] [2023-11-17 12:14:20,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:20,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:20,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:20,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:20,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024141867] [2023-11-17 12:14:20,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024141867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:20,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771903768] [2023-11-17 12:14:20,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:14:20,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:20,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:20,984 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) [2023-11-17 12:14:20,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:14:21,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:14:21,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:21,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:21,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:21,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:21,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771903768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:21,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:21,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093630030] [2023-11-17 12:14:21,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:21,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:21,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:21,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:21,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:21,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:21,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 63 transitions, 433 flow. Second operand has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:21,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:21,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:21,863 INFO L124 PetriNetUnfolderBase]: 5013/6841 cut-off events. [2023-11-17 12:14:21,863 INFO L125 PetriNetUnfolderBase]: For 24578/24578 co-relation queries the response was YES. [2023-11-17 12:14:21,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29193 conditions, 6841 events. 5013/6841 cut-off events. For 24578/24578 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 30298 event pairs, 1421 based on Foata normal form. 126/6967 useless extension candidates. Maximal degree in co-relation 21820. Up to 3782 conditions per place. [2023-11-17 12:14:21,910 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 197 selfloop transitions, 28 changer transitions 0/225 dead transitions. [2023-11-17 12:14:21,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 225 transitions, 1800 flow [2023-11-17 12:14:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:14:21,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:14:21,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 198 transitions. [2023-11-17 12:14:21,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2023-11-17 12:14:21,912 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 198 transitions. [2023-11-17 12:14:21,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 198 transitions. [2023-11-17 12:14:21,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:21,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 198 transitions. [2023-11-17 12:14:21,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,915 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:21,915 INFO L175 Difference]: Start difference. First operand has 73 places, 63 transitions, 433 flow. Second operand 10 states and 198 transitions. [2023-11-17 12:14:21,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 225 transitions, 1800 flow [2023-11-17 12:14:22,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 225 transitions, 1697 flow, removed 37 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:22,015 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 543 flow [2023-11-17 12:14:22,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=418, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=543, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2023-11-17 12:14:22,017 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 46 predicate places. [2023-11-17 12:14:22,017 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 543 flow [2023-11-17 12:14:22,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.0) internal successors, (90), 10 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:22,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:22,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:22,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:22,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:22,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:22,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash 965995544, now seen corresponding path program 3 times [2023-11-17 12:14:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28079809] [2023-11-17 12:14:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:22,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:22,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:22,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28079809] [2023-11-17 12:14:22,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28079809] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:22,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:22,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:22,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939413342] [2023-11-17 12:14:22,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:22,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:22,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:22,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:22,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:22,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 543 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:22,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:22,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:22,824 INFO L124 PetriNetUnfolderBase]: 5314/7238 cut-off events. [2023-11-17 12:14:22,824 INFO L125 PetriNetUnfolderBase]: For 34222/34222 co-relation queries the response was YES. [2023-11-17 12:14:22,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32549 conditions, 7238 events. 5314/7238 cut-off events. For 34222/34222 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 31629 event pairs, 2237 based on Foata normal form. 48/7286 useless extension candidates. Maximal degree in co-relation 30431. Up to 5880 conditions per place. [2023-11-17 12:14:22,861 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 114 selfloop transitions, 12 changer transitions 17/143 dead transitions. [2023-11-17 12:14:22,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 143 transitions, 1441 flow [2023-11-17 12:14:22,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:22,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-17 12:14:22,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2023-11-17 12:14:22,862 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-17 12:14:22,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-17 12:14:22,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:22,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-17 12:14:22,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:22,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:22,864 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:22,864 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 543 flow. Second operand 5 states and 95 transitions. [2023-11-17 12:14:22,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 143 transitions, 1441 flow [2023-11-17 12:14:22,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 143 transitions, 1295 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-17 12:14:22,944 INFO L231 Difference]: Finished difference. Result has 85 places, 77 transitions, 610 flow [2023-11-17 12:14:22,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=85, PETRI_TRANSITIONS=77} [2023-11-17 12:14:22,944 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 47 predicate places. [2023-11-17 12:14:22,944 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 77 transitions, 610 flow [2023-11-17 12:14:22,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:22,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:22,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:22,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:14:22,945 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:22,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:22,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1227111852, now seen corresponding path program 4 times [2023-11-17 12:14:22,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:22,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407352205] [2023-11-17 12:14:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:22,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:23,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:23,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:23,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407352205] [2023-11-17 12:14:23,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407352205] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:23,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:23,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:23,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479079157] [2023-11-17 12:14:23,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:23,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:23,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:23,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:23,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:23,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:23,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 77 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:23,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:23,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:23,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:23,725 INFO L124 PetriNetUnfolderBase]: 5479/7475 cut-off events. [2023-11-17 12:14:23,725 INFO L125 PetriNetUnfolderBase]: For 31645/31645 co-relation queries the response was YES. [2023-11-17 12:14:23,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34174 conditions, 7475 events. 5479/7475 cut-off events. For 31645/31645 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33001 event pairs, 2309 based on Foata normal form. 120/7595 useless extension candidates. Maximal degree in co-relation 32064. Up to 6068 conditions per place. [2023-11-17 12:14:23,768 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 96 selfloop transitions, 34 changer transitions 1/131 dead transitions. [2023-11-17 12:14:23,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 131 transitions, 1244 flow [2023-11-17 12:14:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:23,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 94 transitions. [2023-11-17 12:14:23,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36153846153846153 [2023-11-17 12:14:23,770 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 94 transitions. [2023-11-17 12:14:23,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 94 transitions. [2023-11-17 12:14:23,770 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:23,770 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 94 transitions. [2023-11-17 12:14:23,771 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:23,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:23,771 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:23,772 INFO L175 Difference]: Start difference. First operand has 85 places, 77 transitions, 610 flow. Second operand 5 states and 94 transitions. [2023-11-17 12:14:23,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 131 transitions, 1244 flow [2023-11-17 12:14:23,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1226 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:23,878 INFO L231 Difference]: Finished difference. Result has 88 places, 91 transitions, 850 flow [2023-11-17 12:14:23,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=850, PETRI_PLACES=88, PETRI_TRANSITIONS=91} [2023-11-17 12:14:23,879 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 50 predicate places. [2023-11-17 12:14:23,879 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 91 transitions, 850 flow [2023-11-17 12:14:23,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:23,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:23,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:23,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 12:14:23,880 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:23,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:23,880 INFO L85 PathProgramCache]: Analyzing trace with hash 706204384, now seen corresponding path program 5 times [2023-11-17 12:14:23,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:23,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694708639] [2023-11-17 12:14:23,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:23,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:24,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:24,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694708639] [2023-11-17 12:14:24,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694708639] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:24,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:24,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:24,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014199541] [2023-11-17 12:14:24,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:24,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:24,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:24,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:24,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:24,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:24,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 91 transitions, 850 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:24,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:24,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:24,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:24,764 INFO L124 PetriNetUnfolderBase]: 5787/7903 cut-off events. [2023-11-17 12:14:24,764 INFO L125 PetriNetUnfolderBase]: For 35080/35080 co-relation queries the response was YES. [2023-11-17 12:14:24,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37428 conditions, 7903 events. 5787/7903 cut-off events. For 35080/35080 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 36261 event pairs, 959 based on Foata normal form. 120/8023 useless extension candidates. Maximal degree in co-relation 35330. Up to 4018 conditions per place. [2023-11-17 12:14:24,800 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 165 selfloop transitions, 14 changer transitions 7/186 dead transitions. [2023-11-17 12:14:24,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 186 transitions, 1942 flow [2023-11-17 12:14:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:24,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:24,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 102 transitions. [2023-11-17 12:14:24,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3923076923076923 [2023-11-17 12:14:24,801 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 102 transitions. [2023-11-17 12:14:24,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 102 transitions. [2023-11-17 12:14:24,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:24,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 102 transitions. [2023-11-17 12:14:24,802 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:24,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:24,802 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:24,802 INFO L175 Difference]: Start difference. First operand has 88 places, 91 transitions, 850 flow. Second operand 5 states and 102 transitions. [2023-11-17 12:14:24,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 186 transitions, 1942 flow [2023-11-17 12:14:24,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 186 transitions, 1882 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:24,908 INFO L231 Difference]: Finished difference. Result has 93 places, 96 transitions, 930 flow [2023-11-17 12:14:24,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=930, PETRI_PLACES=93, PETRI_TRANSITIONS=96} [2023-11-17 12:14:24,909 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 55 predicate places. [2023-11-17 12:14:24,909 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 96 transitions, 930 flow [2023-11-17 12:14:24,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:24,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:24,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:24,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 12:14:24,910 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:24,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:24,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1993595960, now seen corresponding path program 6 times [2023-11-17 12:14:24,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:24,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212214979] [2023-11-17 12:14:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:24,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:24,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:24,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212214979] [2023-11-17 12:14:24,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212214979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:24,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:24,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:24,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908778388] [2023-11-17 12:14:24,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:24,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:24,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:24,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:24,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:24,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:24,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 96 transitions, 930 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:24,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:24,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:24,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:25,727 INFO L124 PetriNetUnfolderBase]: 5854/8010 cut-off events. [2023-11-17 12:14:25,727 INFO L125 PetriNetUnfolderBase]: For 38957/38957 co-relation queries the response was YES. [2023-11-17 12:14:25,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38689 conditions, 8010 events. 5854/8010 cut-off events. For 38957/38957 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 37328 event pairs, 1041 based on Foata normal form. 88/8098 useless extension candidates. Maximal degree in co-relation 36547. Up to 2960 conditions per place. [2023-11-17 12:14:25,765 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 158 selfloop transitions, 19 changer transitions 6/183 dead transitions. [2023-11-17 12:14:25,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 183 transitions, 1925 flow [2023-11-17 12:14:25,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:25,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:25,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2023-11-17 12:14:25,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2023-11-17 12:14:25,766 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 108 transitions. [2023-11-17 12:14:25,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 108 transitions. [2023-11-17 12:14:25,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:25,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 108 transitions. [2023-11-17 12:14:25,767 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 21.6) internal successors, (108), 5 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:25,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:25,767 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:25,767 INFO L175 Difference]: Start difference. First operand has 93 places, 96 transitions, 930 flow. Second operand 5 states and 108 transitions. [2023-11-17 12:14:25,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 183 transitions, 1925 flow [2023-11-17 12:14:25,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 183 transitions, 1863 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:25,895 INFO L231 Difference]: Finished difference. Result has 97 places, 98 transitions, 975 flow [2023-11-17 12:14:25,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=975, PETRI_PLACES=97, PETRI_TRANSITIONS=98} [2023-11-17 12:14:25,896 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 59 predicate places. [2023-11-17 12:14:25,896 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 98 transitions, 975 flow [2023-11-17 12:14:25,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:25,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:25,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:25,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-17 12:14:25,896 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:25,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash -427428758, now seen corresponding path program 7 times [2023-11-17 12:14:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:25,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352808998] [2023-11-17 12:14:25,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:25,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:25,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:25,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:25,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352808998] [2023-11-17 12:14:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352808998] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:25,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:25,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956450788] [2023-11-17 12:14:25,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:25,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:25,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:25,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 98 transitions, 975 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:25,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:25,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:25,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:26,726 INFO L124 PetriNetUnfolderBase]: 5744/7882 cut-off events. [2023-11-17 12:14:26,726 INFO L125 PetriNetUnfolderBase]: For 46965/46965 co-relation queries the response was YES. [2023-11-17 12:14:26,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39300 conditions, 7882 events. 5744/7882 cut-off events. For 46965/46965 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35661 event pairs, 2325 based on Foata normal form. 48/7930 useless extension candidates. Maximal degree in co-relation 36982. Up to 6074 conditions per place. [2023-11-17 12:14:26,755 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 83 selfloop transitions, 35 changer transitions 18/136 dead transitions. [2023-11-17 12:14:26,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 136 transitions, 1463 flow [2023-11-17 12:14:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:26,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-17 12:14:26,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2023-11-17 12:14:26,757 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-17 12:14:26,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-17 12:14:26,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:26,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-17 12:14:26,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:26,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:26,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:26,758 INFO L175 Difference]: Start difference. First operand has 97 places, 98 transitions, 975 flow. Second operand 5 states and 95 transitions. [2023-11-17 12:14:26,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 136 transitions, 1463 flow [2023-11-17 12:14:26,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 136 transitions, 1425 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:26,866 INFO L231 Difference]: Finished difference. Result has 100 places, 94 transitions, 979 flow [2023-11-17 12:14:26,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=944, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=979, PETRI_PLACES=100, PETRI_TRANSITIONS=94} [2023-11-17 12:14:26,866 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 62 predicate places. [2023-11-17 12:14:26,866 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 94 transitions, 979 flow [2023-11-17 12:14:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:26,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:26,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:26,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-17 12:14:26,867 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:26,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:26,867 INFO L85 PathProgramCache]: Analyzing trace with hash -344322204, now seen corresponding path program 6 times [2023-11-17 12:14:26,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:26,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624816316] [2023-11-17 12:14:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:26,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624816316] [2023-11-17 12:14:26,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624816316] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:26,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:26,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:26,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125984570] [2023-11-17 12:14:26,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:26,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:26,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:26,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:26,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:26,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:26,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 94 transitions, 979 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:26,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:26,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:26,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:27,674 INFO L124 PetriNetUnfolderBase]: 5633/7743 cut-off events. [2023-11-17 12:14:27,674 INFO L125 PetriNetUnfolderBase]: For 47228/47228 co-relation queries the response was YES. [2023-11-17 12:14:27,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38980 conditions, 7743 events. 5633/7743 cut-off events. For 47228/47228 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 35471 event pairs, 1786 based on Foata normal form. 32/7775 useless extension candidates. Maximal degree in co-relation 36807. Up to 5248 conditions per place. [2023-11-17 12:14:27,718 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 151 selfloop transitions, 13 changer transitions 22/186 dead transitions. [2023-11-17 12:14:27,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 186 transitions, 2126 flow [2023-11-17 12:14:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:27,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2023-11-17 12:14:27,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2023-11-17 12:14:27,719 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 99 transitions. [2023-11-17 12:14:27,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 99 transitions. [2023-11-17 12:14:27,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:27,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 99 transitions. [2023-11-17 12:14:27,720 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:27,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:27,721 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:27,721 INFO L175 Difference]: Start difference. First operand has 100 places, 94 transitions, 979 flow. Second operand 5 states and 99 transitions. [2023-11-17 12:14:27,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 186 transitions, 2126 flow [2023-11-17 12:14:27,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 186 transitions, 2022 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 12:14:27,867 INFO L231 Difference]: Finished difference. Result has 101 places, 94 transitions, 952 flow [2023-11-17 12:14:27,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=952, PETRI_PLACES=101, PETRI_TRANSITIONS=94} [2023-11-17 12:14:27,868 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-11-17 12:14:27,868 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 94 transitions, 952 flow [2023-11-17 12:14:27,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:27,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:27,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:27,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-17 12:14:27,868 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:27,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:27,869 INFO L85 PathProgramCache]: Analyzing trace with hash 447712508, now seen corresponding path program 8 times [2023-11-17 12:14:27,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:27,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016358897] [2023-11-17 12:14:27,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:27,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:27,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:27,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:27,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016358897] [2023-11-17 12:14:27,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016358897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:27,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:27,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:27,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701671561] [2023-11-17 12:14:27,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:27,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:27,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:27,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:27,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:27,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:27,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 94 transitions, 952 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:27,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:27,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:27,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:28,543 INFO L124 PetriNetUnfolderBase]: 5136/7072 cut-off events. [2023-11-17 12:14:28,543 INFO L125 PetriNetUnfolderBase]: For 42925/42925 co-relation queries the response was YES. [2023-11-17 12:14:28,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35165 conditions, 7072 events. 5136/7072 cut-off events. For 42925/42925 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 31878 event pairs, 1982 based on Foata normal form. 120/7192 useless extension candidates. Maximal degree in co-relation 32963. Up to 5515 conditions per place. [2023-11-17 12:14:28,582 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 117 selfloop transitions, 21 changer transitions 12/150 dead transitions. [2023-11-17 12:14:28,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 150 transitions, 1637 flow [2023-11-17 12:14:28,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:28,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:28,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2023-11-17 12:14:28,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3576923076923077 [2023-11-17 12:14:28,584 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 93 transitions. [2023-11-17 12:14:28,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 93 transitions. [2023-11-17 12:14:28,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:28,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 93 transitions. [2023-11-17 12:14:28,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:28,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:28,585 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:28,585 INFO L175 Difference]: Start difference. First operand has 101 places, 94 transitions, 952 flow. Second operand 5 states and 93 transitions. [2023-11-17 12:14:28,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 150 transitions, 1637 flow [2023-11-17 12:14:28,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 150 transitions, 1602 flow, removed 7 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:28,725 INFO L231 Difference]: Finished difference. Result has 101 places, 86 transitions, 839 flow [2023-11-17 12:14:28,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=839, PETRI_PLACES=101, PETRI_TRANSITIONS=86} [2023-11-17 12:14:28,725 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 63 predicate places. [2023-11-17 12:14:28,725 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 86 transitions, 839 flow [2023-11-17 12:14:28,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:28,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:28,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:28,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-17 12:14:28,726 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:28,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:28,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1324073600, now seen corresponding path program 7 times [2023-11-17 12:14:28,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:28,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181790659] [2023-11-17 12:14:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:28,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:28,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:28,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:28,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181790659] [2023-11-17 12:14:28,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181790659] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:28,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:28,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:28,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932298320] [2023-11-17 12:14:28,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:28,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:28,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:28,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:28,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:28,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 86 transitions, 839 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:28,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:28,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:28,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:29,401 INFO L124 PetriNetUnfolderBase]: 4550/6207 cut-off events. [2023-11-17 12:14:29,401 INFO L125 PetriNetUnfolderBase]: For 33612/33612 co-relation queries the response was YES. [2023-11-17 12:14:29,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30446 conditions, 6207 events. 4550/6207 cut-off events. For 33612/33612 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 26486 event pairs, 1937 based on Foata normal form. 32/6239 useless extension candidates. Maximal degree in co-relation 28905. Up to 4983 conditions per place. [2023-11-17 12:14:29,442 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 81 selfloop transitions, 27 changer transitions 9/117 dead transitions. [2023-11-17 12:14:29,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 117 transitions, 1230 flow [2023-11-17 12:14:29,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:29,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2023-11-17 12:14:29,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384615384615385 [2023-11-17 12:14:29,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 88 transitions. [2023-11-17 12:14:29,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 88 transitions. [2023-11-17 12:14:29,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:29,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 88 transitions. [2023-11-17 12:14:29,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:29,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:29,445 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:29,445 INFO L175 Difference]: Start difference. First operand has 101 places, 86 transitions, 839 flow. Second operand 5 states and 88 transitions. [2023-11-17 12:14:29,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 117 transitions, 1230 flow [2023-11-17 12:14:29,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 1127 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-17 12:14:29,531 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 768 flow [2023-11-17 12:14:29,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=768, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2023-11-17 12:14:29,532 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2023-11-17 12:14:29,532 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 768 flow [2023-11-17 12:14:29,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:29,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:29,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:29,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-17 12:14:29,533 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:29,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:29,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1462386092, now seen corresponding path program 8 times [2023-11-17 12:14:29,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:29,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984651386] [2023-11-17 12:14:29,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:29,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:29,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:29,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984651386] [2023-11-17 12:14:29,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984651386] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:29,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:29,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:29,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419585941] [2023-11-17 12:14:29,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:29,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:29,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:29,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:29,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:29,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:29,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 768 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:29,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:29,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:29,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:30,042 INFO L124 PetriNetUnfolderBase]: 3996/5415 cut-off events. [2023-11-17 12:14:30,043 INFO L125 PetriNetUnfolderBase]: For 23671/23671 co-relation queries the response was YES. [2023-11-17 12:14:30,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24943 conditions, 5415 events. 3996/5415 cut-off events. For 23671/23671 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 23011 event pairs, 982 based on Foata normal form. 102/5517 useless extension candidates. Maximal degree in co-relation 22999. Up to 2518 conditions per place. [2023-11-17 12:14:30,072 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 104 selfloop transitions, 21 changer transitions 20/145 dead transitions. [2023-11-17 12:14:30,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 145 transitions, 1445 flow [2023-11-17 12:14:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:30,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2023-11-17 12:14:30,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2023-11-17 12:14:30,073 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 96 transitions. [2023-11-17 12:14:30,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 96 transitions. [2023-11-17 12:14:30,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:30,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 96 transitions. [2023-11-17 12:14:30,074 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,075 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,075 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 768 flow. Second operand 5 states and 96 transitions. [2023-11-17 12:14:30,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 145 transitions, 1445 flow [2023-11-17 12:14:30,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 145 transitions, 1381 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:30,128 INFO L231 Difference]: Finished difference. Result has 91 places, 80 transitions, 726 flow [2023-11-17 12:14:30,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=692, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=726, PETRI_PLACES=91, PETRI_TRANSITIONS=80} [2023-11-17 12:14:30,129 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 53 predicate places. [2023-11-17 12:14:30,129 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 80 transitions, 726 flow [2023-11-17 12:14:30,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:30,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:30,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-17 12:14:30,129 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:30,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:30,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2040249173, now seen corresponding path program 1 times [2023-11-17 12:14:30,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:30,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097340714] [2023-11-17 12:14:30,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:30,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:30,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:30,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:30,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097340714] [2023-11-17 12:14:30,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097340714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135064603] [2023-11-17 12:14:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:30,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:30,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:30,194 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) [2023-11-17 12:14:30,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:14:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:30,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:30,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:30,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:30,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135064603] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:30,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:30,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:14:30,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982017540] [2023-11-17 12:14:30,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:30,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:14:30,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:30,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:14:30,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:14:30,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:30,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 80 transitions, 726 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:30,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:30,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:30,888 INFO L124 PetriNetUnfolderBase]: 4253/5730 cut-off events. [2023-11-17 12:14:30,889 INFO L125 PetriNetUnfolderBase]: For 26043/26043 co-relation queries the response was YES. [2023-11-17 12:14:30,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27144 conditions, 5730 events. 4253/5730 cut-off events. For 26043/26043 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 24397 event pairs, 319 based on Foata normal form. 160/5890 useless extension candidates. Maximal degree in co-relation 24658. Up to 2391 conditions per place. [2023-11-17 12:14:30,918 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 136 selfloop transitions, 38 changer transitions 1/175 dead transitions. [2023-11-17 12:14:30,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 175 transitions, 1622 flow [2023-11-17 12:14:30,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:14:30,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:14:30,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2023-11-17 12:14:30,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2023-11-17 12:14:30,921 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 135 transitions. [2023-11-17 12:14:30,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 135 transitions. [2023-11-17 12:14:30,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:30,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 135 transitions. [2023-11-17 12:14:30,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,922 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,922 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,922 INFO L175 Difference]: Start difference. First operand has 91 places, 80 transitions, 726 flow. Second operand 7 states and 135 transitions. [2023-11-17 12:14:30,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 175 transitions, 1622 flow [2023-11-17 12:14:30,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 175 transitions, 1522 flow, removed 19 selfloop flow, removed 6 redundant places. [2023-11-17 12:14:30,994 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 825 flow [2023-11-17 12:14:30,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=825, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2023-11-17 12:14:30,994 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 51 predicate places. [2023-11-17 12:14:30,994 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 825 flow [2023-11-17 12:14:30,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:30,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:30,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:31,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:31,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:31,195 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:31,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 441095439, now seen corresponding path program 2 times [2023-11-17 12:14:31,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:31,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417619074] [2023-11-17 12:14:31,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:31,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:31,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:31,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:31,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417619074] [2023-11-17 12:14:31,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417619074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:31,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:31,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:31,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944174912] [2023-11-17 12:14:31,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:31,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:31,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:31,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:31,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:31,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:31,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 825 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:31,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:31,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:31,880 INFO L124 PetriNetUnfolderBase]: 5135/6942 cut-off events. [2023-11-17 12:14:31,880 INFO L125 PetriNetUnfolderBase]: For 35917/35917 co-relation queries the response was YES. [2023-11-17 12:14:31,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32753 conditions, 6942 events. 5135/6942 cut-off events. For 35917/35917 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 30069 event pairs, 1063 based on Foata normal form. 60/7002 useless extension candidates. Maximal degree in co-relation 29952. Up to 3529 conditions per place. [2023-11-17 12:14:31,921 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 219 selfloop transitions, 7 changer transitions 17/243 dead transitions. [2023-11-17 12:14:31,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 243 transitions, 2874 flow [2023-11-17 12:14:31,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:31,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2023-11-17 12:14:31,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2023-11-17 12:14:31,922 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 96 transitions. [2023-11-17 12:14:31,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 96 transitions. [2023-11-17 12:14:31,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:31,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 96 transitions. [2023-11-17 12:14:31,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,924 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:31,924 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 825 flow. Second operand 5 states and 96 transitions. [2023-11-17 12:14:31,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 243 transitions, 2874 flow [2023-11-17 12:14:32,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 243 transitions, 2726 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:32,002 INFO L231 Difference]: Finished difference. Result has 94 places, 91 transitions, 866 flow [2023-11-17 12:14:32,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=866, PETRI_PLACES=94, PETRI_TRANSITIONS=91} [2023-11-17 12:14:32,003 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 56 predicate places. [2023-11-17 12:14:32,003 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 91 transitions, 866 flow [2023-11-17 12:14:32,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:32,003 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:32,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-17 12:14:32,004 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:32,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:32,004 INFO L85 PathProgramCache]: Analyzing trace with hash 877693237, now seen corresponding path program 3 times [2023-11-17 12:14:32,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:32,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755474541] [2023-11-17 12:14:32,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:32,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:32,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:32,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:32,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755474541] [2023-11-17 12:14:32,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755474541] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:32,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641508655] [2023-11-17 12:14:32,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:14:32,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:32,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:32,069 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) [2023-11-17 12:14:32,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:14:32,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:14:32,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:32,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:32,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:32,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:32,268 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:32,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641508655] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:32,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:32,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:32,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890715672] [2023-11-17 12:14:32,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:32,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:32,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:32,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:32,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:32,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:32,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 91 transitions, 866 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:32,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:32,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:32,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:33,116 INFO L124 PetriNetUnfolderBase]: 6013/8080 cut-off events. [2023-11-17 12:14:33,116 INFO L125 PetriNetUnfolderBase]: For 44630/44630 co-relation queries the response was YES. [2023-11-17 12:14:33,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40632 conditions, 8080 events. 6013/8080 cut-off events. For 44630/44630 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 35124 event pairs, 1259 based on Foata normal form. 160/8240 useless extension candidates. Maximal degree in co-relation 36940. Up to 3811 conditions per place. [2023-11-17 12:14:33,159 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 173 selfloop transitions, 54 changer transitions 0/227 dead transitions. [2023-11-17 12:14:33,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 227 transitions, 2230 flow [2023-11-17 12:14:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:14:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:14:33,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2023-11-17 12:14:33,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34423076923076923 [2023-11-17 12:14:33,160 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 179 transitions. [2023-11-17 12:14:33,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 179 transitions. [2023-11-17 12:14:33,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:33,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 179 transitions. [2023-11-17 12:14:33,161 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.9) internal successors, (179), 10 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,162 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,162 INFO L175 Difference]: Start difference. First operand has 94 places, 91 transitions, 866 flow. Second operand 10 states and 179 transitions. [2023-11-17 12:14:33,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 227 transitions, 2230 flow [2023-11-17 12:14:33,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 227 transitions, 2140 flow, removed 33 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:33,292 INFO L231 Difference]: Finished difference. Result has 104 places, 107 transitions, 1129 flow [2023-11-17 12:14:33,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1129, PETRI_PLACES=104, PETRI_TRANSITIONS=107} [2023-11-17 12:14:33,292 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-17 12:14:33,292 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 107 transitions, 1129 flow [2023-11-17 12:14:33,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:33,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:33,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:33,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:33,495 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:33,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:33,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1156221357, now seen corresponding path program 4 times [2023-11-17 12:14:33,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:33,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919244199] [2023-11-17 12:14:33,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:33,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:33,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:33,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:33,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919244199] [2023-11-17 12:14:33,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919244199] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:33,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:33,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:33,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524468678] [2023-11-17 12:14:33,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:33,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:33,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:33,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:33,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:33,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:33,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 107 transitions, 1129 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:33,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:33,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:33,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:34,210 INFO L124 PetriNetUnfolderBase]: 5989/8056 cut-off events. [2023-11-17 12:14:34,210 INFO L125 PetriNetUnfolderBase]: For 51414/51414 co-relation queries the response was YES. [2023-11-17 12:14:34,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42383 conditions, 8056 events. 5989/8056 cut-off events. For 51414/51414 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 34641 event pairs, 1794 based on Foata normal form. 24/8080 useless extension candidates. Maximal degree in co-relation 38982. Up to 5754 conditions per place. [2023-11-17 12:14:34,273 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 122 selfloop transitions, 20 changer transitions 7/149 dead transitions. [2023-11-17 12:14:34,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 149 transitions, 1707 flow [2023-11-17 12:14:34,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:34,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:34,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2023-11-17 12:14:34,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3346153846153846 [2023-11-17 12:14:34,274 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2023-11-17 12:14:34,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2023-11-17 12:14:34,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:34,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2023-11-17 12:14:34,275 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,275 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,275 INFO L175 Difference]: Start difference. First operand has 104 places, 107 transitions, 1129 flow. Second operand 5 states and 87 transitions. [2023-11-17 12:14:34,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 149 transitions, 1707 flow [2023-11-17 12:14:34,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 149 transitions, 1595 flow, removed 6 selfloop flow, removed 5 redundant places. [2023-11-17 12:14:34,472 INFO L231 Difference]: Finished difference. Result has 104 places, 106 transitions, 1067 flow [2023-11-17 12:14:34,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1027, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1067, PETRI_PLACES=104, PETRI_TRANSITIONS=106} [2023-11-17 12:14:34,472 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-17 12:14:34,472 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 106 transitions, 1067 flow [2023-11-17 12:14:34,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:34,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:34,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-17 12:14:34,473 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:34,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1314416763, now seen corresponding path program 5 times [2023-11-17 12:14:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:34,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679339577] [2023-11-17 12:14:34,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:34,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:34,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:34,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679339577] [2023-11-17 12:14:34,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679339577] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:34,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:34,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:34,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548165755] [2023-11-17 12:14:34,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:34,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:34,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:34,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:34,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 106 transitions, 1067 flow. Second operand has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:34,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:34,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:34,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:35,076 INFO L124 PetriNetUnfolderBase]: 5478/7353 cut-off events. [2023-11-17 12:14:35,076 INFO L125 PetriNetUnfolderBase]: For 47279/47279 co-relation queries the response was YES. [2023-11-17 12:14:35,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37871 conditions, 7353 events. 5478/7353 cut-off events. For 47279/47279 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 31015 event pairs, 1580 based on Foata normal form. 160/7513 useless extension candidates. Maximal degree in co-relation 34460. Up to 5110 conditions per place. [2023-11-17 12:14:35,117 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 145 selfloop transitions, 19 changer transitions 1/165 dead transitions. [2023-11-17 12:14:35,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 165 transitions, 1774 flow [2023-11-17 12:14:35,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:35,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:35,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2023-11-17 12:14:35,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36538461538461536 [2023-11-17 12:14:35,118 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 95 transitions. [2023-11-17 12:14:35,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 95 transitions. [2023-11-17 12:14:35,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:35,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 95 transitions. [2023-11-17 12:14:35,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.0) internal successors, (95), 5 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,119 INFO L175 Difference]: Start difference. First operand has 104 places, 106 transitions, 1067 flow. Second operand 5 states and 95 transitions. [2023-11-17 12:14:35,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 165 transitions, 1774 flow [2023-11-17 12:14:35,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 165 transitions, 1728 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 12:14:35,236 INFO L231 Difference]: Finished difference. Result has 103 places, 105 transitions, 1043 flow [2023-11-17 12:14:35,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1043, PETRI_PLACES=103, PETRI_TRANSITIONS=105} [2023-11-17 12:14:35,236 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 65 predicate places. [2023-11-17 12:14:35,236 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 105 transitions, 1043 flow [2023-11-17 12:14:35,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:35,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:35,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-17 12:14:35,237 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:35,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:35,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2075510321, now seen corresponding path program 1 times [2023-11-17 12:14:35,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:35,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13927324] [2023-11-17 12:14:35,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:35,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:35,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:35,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:35,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:35,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13927324] [2023-11-17 12:14:35,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13927324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:35,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242095228] [2023-11-17 12:14:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:35,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:35,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:35,291 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) [2023-11-17 12:14:35,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:14:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:35,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:35,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:35,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242095228] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:35,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:35,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:14:35,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665486580] [2023-11-17 12:14:35,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:35,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:14:35,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:35,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:14:35,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:14:35,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:35,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 105 transitions, 1043 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:35,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:35,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:35,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:36,214 INFO L124 PetriNetUnfolderBase]: 6532/8791 cut-off events. [2023-11-17 12:14:36,215 INFO L125 PetriNetUnfolderBase]: For 49640/49640 co-relation queries the response was YES. [2023-11-17 12:14:36,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45082 conditions, 8791 events. 6532/8791 cut-off events. For 49640/49640 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39790 event pairs, 497 based on Foata normal form. 310/9101 useless extension candidates. Maximal degree in co-relation 40752. Up to 4187 conditions per place. [2023-11-17 12:14:36,269 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 156 selfloop transitions, 76 changer transitions 1/233 dead transitions. [2023-11-17 12:14:36,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 233 transitions, 2485 flow [2023-11-17 12:14:36,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:14:36,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:14:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2023-11-17 12:14:36,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3708791208791209 [2023-11-17 12:14:36,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 135 transitions. [2023-11-17 12:14:36,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 135 transitions. [2023-11-17 12:14:36,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:36,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 135 transitions. [2023-11-17 12:14:36,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,271 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 52.0) internal successors, (416), 8 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,271 INFO L175 Difference]: Start difference. First operand has 103 places, 105 transitions, 1043 flow. Second operand 7 states and 135 transitions. [2023-11-17 12:14:36,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 233 transitions, 2485 flow [2023-11-17 12:14:36,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 233 transitions, 2310 flow, removed 18 selfloop flow, removed 8 redundant places. [2023-11-17 12:14:36,417 INFO L231 Difference]: Finished difference. Result has 104 places, 137 transitions, 1558 flow [2023-11-17 12:14:36,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1558, PETRI_PLACES=104, PETRI_TRANSITIONS=137} [2023-11-17 12:14:36,417 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 66 predicate places. [2023-11-17 12:14:36,417 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 137 transitions, 1558 flow [2023-11-17 12:14:36,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:36,417 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:36,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:36,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:36,619 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:36,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:36,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1622688229, now seen corresponding path program 2 times [2023-11-17 12:14:36,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:36,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759576401] [2023-11-17 12:14:36,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:36,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:36,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:36,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759576401] [2023-11-17 12:14:36,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759576401] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:36,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:36,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:36,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50805527] [2023-11-17 12:14:36,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:36,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:36,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:36,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:36,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:36,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:36,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 137 transitions, 1558 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:36,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:36,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:36,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:37,362 INFO L124 PetriNetUnfolderBase]: 6732/9087 cut-off events. [2023-11-17 12:14:37,362 INFO L125 PetriNetUnfolderBase]: For 61622/61622 co-relation queries the response was YES. [2023-11-17 12:14:37,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48057 conditions, 9087 events. 6732/9087 cut-off events. For 61622/61622 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40775 event pairs, 1385 based on Foata normal form. 54/9141 useless extension candidates. Maximal degree in co-relation 43622. Up to 5475 conditions per place. [2023-11-17 12:14:37,413 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 205 selfloop transitions, 46 changer transitions 8/259 dead transitions. [2023-11-17 12:14:37,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 259 transitions, 3524 flow [2023-11-17 12:14:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:37,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:37,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2023-11-17 12:14:37,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33076923076923076 [2023-11-17 12:14:37,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 86 transitions. [2023-11-17 12:14:37,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 86 transitions. [2023-11-17 12:14:37,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:37,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 86 transitions. [2023-11-17 12:14:37,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:37,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:37,415 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:37,415 INFO L175 Difference]: Start difference. First operand has 104 places, 137 transitions, 1558 flow. Second operand 5 states and 86 transitions. [2023-11-17 12:14:37,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 259 transitions, 3524 flow [2023-11-17 12:14:37,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 259 transitions, 3446 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 12:14:37,612 INFO L231 Difference]: Finished difference. Result has 109 places, 164 transitions, 2187 flow [2023-11-17 12:14:37,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2187, PETRI_PLACES=109, PETRI_TRANSITIONS=164} [2023-11-17 12:14:37,613 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 71 predicate places. [2023-11-17 12:14:37,613 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 164 transitions, 2187 flow [2023-11-17 12:14:37,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:37,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:37,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:37,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2023-11-17 12:14:37,614 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:37,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash -535971655, now seen corresponding path program 3 times [2023-11-17 12:14:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:37,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906999867] [2023-11-17 12:14:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:37,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:37,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:37,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:37,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906999867] [2023-11-17 12:14:37,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906999867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:37,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:37,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:37,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159398460] [2023-11-17 12:14:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:37,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:37,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:37,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:37,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:37,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:37,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 164 transitions, 2187 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:37,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:37,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:37,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:38,388 INFO L124 PetriNetUnfolderBase]: 6591/8892 cut-off events. [2023-11-17 12:14:38,388 INFO L125 PetriNetUnfolderBase]: For 73088/73088 co-relation queries the response was YES. [2023-11-17 12:14:38,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49610 conditions, 8892 events. 6591/8892 cut-off events. For 73088/73088 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39522 event pairs, 2107 based on Foata normal form. 42/8934 useless extension candidates. Maximal degree in co-relation 45024. Up to 7831 conditions per place. [2023-11-17 12:14:38,443 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 136 selfloop transitions, 72 changer transitions 8/216 dead transitions. [2023-11-17 12:14:38,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 216 transitions, 3236 flow [2023-11-17 12:14:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-17 12:14:38,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3192307692307692 [2023-11-17 12:14:38,444 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-17 12:14:38,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-17 12:14:38,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:38,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-17 12:14:38,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,444 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,444 INFO L175 Difference]: Start difference. First operand has 109 places, 164 transitions, 2187 flow. Second operand 5 states and 83 transitions. [2023-11-17 12:14:38,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 216 transitions, 3236 flow [2023-11-17 12:14:38,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 216 transitions, 3082 flow, removed 48 selfloop flow, removed 3 redundant places. [2023-11-17 12:14:38,634 INFO L231 Difference]: Finished difference. Result has 111 places, 188 transitions, 2716 flow [2023-11-17 12:14:38,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2083, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2716, PETRI_PLACES=111, PETRI_TRANSITIONS=188} [2023-11-17 12:14:38,635 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 73 predicate places. [2023-11-17 12:14:38,635 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 188 transitions, 2716 flow [2023-11-17 12:14:38,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:38,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:38,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-17 12:14:38,635 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:38,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:38,635 INFO L85 PathProgramCache]: Analyzing trace with hash -239036631, now seen corresponding path program 4 times [2023-11-17 12:14:38,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:38,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690632774] [2023-11-17 12:14:38,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:38,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:38,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690632774] [2023-11-17 12:14:38,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690632774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758253183] [2023-11-17 12:14:38,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:14:38,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:38,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:38,693 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) [2023-11-17 12:14:38,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:14:38,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:14:38,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:38,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:38,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:38,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:38,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:38,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758253183] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:38,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:38,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:38,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136175107] [2023-11-17 12:14:38,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:38,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:38,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:38,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:38,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:38,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:38,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 188 transitions, 2716 flow. Second operand has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:38,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:38,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:38,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:40,079 INFO L124 PetriNetUnfolderBase]: 8674/11733 cut-off events. [2023-11-17 12:14:40,080 INFO L125 PetriNetUnfolderBase]: For 92127/92127 co-relation queries the response was YES. [2023-11-17 12:14:40,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64461 conditions, 11733 events. 8674/11733 cut-off events. For 92127/92127 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 55394 event pairs, 1337 based on Foata normal form. 310/12043 useless extension candidates. Maximal degree in co-relation 58002. Up to 5903 conditions per place. [2023-11-17 12:14:40,135 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 209 selfloop transitions, 174 changer transitions 0/383 dead transitions. [2023-11-17 12:14:40,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 383 transitions, 5192 flow [2023-11-17 12:14:40,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:14:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:14:40,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2023-11-17 12:14:40,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3403846153846154 [2023-11-17 12:14:40,136 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 177 transitions. [2023-11-17 12:14:40,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 177 transitions. [2023-11-17 12:14:40,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:40,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 177 transitions. [2023-11-17 12:14:40,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 17.7) internal successors, (177), 10 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:40,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:40,137 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:40,137 INFO L175 Difference]: Start difference. First operand has 111 places, 188 transitions, 2716 flow. Second operand 10 states and 177 transitions. [2023-11-17 12:14:40,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 383 transitions, 5192 flow [2023-11-17 12:14:40,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 383 transitions, 5066 flow, removed 30 selfloop flow, removed 1 redundant places. [2023-11-17 12:14:40,395 INFO L231 Difference]: Finished difference. Result has 122 places, 244 transitions, 3861 flow [2023-11-17 12:14:40,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3861, PETRI_PLACES=122, PETRI_TRANSITIONS=244} [2023-11-17 12:14:40,396 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 84 predicate places. [2023-11-17 12:14:40,396 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 244 transitions, 3861 flow [2023-11-17 12:14:40,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.9) internal successors, (99), 10 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:40,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:40,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:40,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:40,600 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,SelfDestructingSolverStorable27 [2023-11-17 12:14:40,601 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:40,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:40,601 INFO L85 PathProgramCache]: Analyzing trace with hash -290728407, now seen corresponding path program 5 times [2023-11-17 12:14:40,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:40,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856123079] [2023-11-17 12:14:40,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:40,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:40,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:40,653 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:40,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:40,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856123079] [2023-11-17 12:14:40,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856123079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:40,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124588931] [2023-11-17 12:14:40,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:14:40,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:40,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:40,655 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) [2023-11-17 12:14:40,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:14:40,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:14:40,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:40,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:40,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:40,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:40,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:14:40,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124588931] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:40,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:40,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:40,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531260124] [2023-11-17 12:14:40,851 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:40,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:40,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:40,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:40,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:40,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:40,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 244 transitions, 3861 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:40,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:40,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:40,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:42,590 INFO L124 PetriNetUnfolderBase]: 12649/17126 cut-off events. [2023-11-17 12:14:42,590 INFO L125 PetriNetUnfolderBase]: For 159070/159070 co-relation queries the response was YES. [2023-11-17 12:14:42,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100699 conditions, 17126 events. 12649/17126 cut-off events. For 159070/159070 co-relation queries the response was YES. Maximal size of possible extension queue 712. Compared 86750 event pairs, 753 based on Foata normal form. 228/17354 useless extension candidates. Maximal degree in co-relation 89253. Up to 8913 conditions per place. [2023-11-17 12:14:42,721 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 618 selfloop transitions, 250 changer transitions 0/868 dead transitions. [2023-11-17 12:14:42,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 868 transitions, 13730 flow [2023-11-17 12:14:42,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:14:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:14:42,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 291 transitions. [2023-11-17 12:14:42,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32918552036199095 [2023-11-17 12:14:42,722 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 291 transitions. [2023-11-17 12:14:42,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 291 transitions. [2023-11-17 12:14:42,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:42,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 291 transitions. [2023-11-17 12:14:42,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 17.11764705882353) internal successors, (291), 17 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:42,724 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:42,724 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 52.0) internal successors, (936), 18 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:42,724 INFO L175 Difference]: Start difference. First operand has 122 places, 244 transitions, 3861 flow. Second operand 17 states and 291 transitions. [2023-11-17 12:14:42,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 868 transitions, 13730 flow [2023-11-17 12:14:43,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 868 transitions, 12769 flow, removed 118 selfloop flow, removed 5 redundant places. [2023-11-17 12:14:43,824 INFO L231 Difference]: Finished difference. Result has 146 places, 498 transitions, 7742 flow [2023-11-17 12:14:43,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7742, PETRI_PLACES=146, PETRI_TRANSITIONS=498} [2023-11-17 12:14:43,825 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 108 predicate places. [2023-11-17 12:14:43,825 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 498 transitions, 7742 flow [2023-11-17 12:14:43,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:43,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:43,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:43,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:44,027 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,SelfDestructingSolverStorable28 [2023-11-17 12:14:44,028 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:44,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:44,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1033600605, now seen corresponding path program 6 times [2023-11-17 12:14:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:44,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114628004] [2023-11-17 12:14:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:44,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:44,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:44,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114628004] [2023-11-17 12:14:44,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114628004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:44,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200205897] [2023-11-17 12:14:44,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:14:44,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:44,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:44,338 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) [2023-11-17 12:14:44,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:14:44,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:14:44,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:14:44,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:14:44,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:44,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:44,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200205897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:44,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:44,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:14:44,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034541430] [2023-11-17 12:14:44,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:14:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:44,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:14:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:14:44,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:44,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 498 transitions, 7742 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:44,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:44,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:44,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:47,491 INFO L124 PetriNetUnfolderBase]: 13637/18586 cut-off events. [2023-11-17 12:14:47,492 INFO L125 PetriNetUnfolderBase]: For 270542/270542 co-relation queries the response was YES. [2023-11-17 12:14:47,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123568 conditions, 18586 events. 13637/18586 cut-off events. For 270542/270542 co-relation queries the response was YES. Maximal size of possible extension queue 782. Compared 95904 event pairs, 1542 based on Foata normal form. 168/18754 useless extension candidates. Maximal degree in co-relation 115786. Up to 9839 conditions per place. [2023-11-17 12:14:47,632 INFO L140 encePairwiseOnDemand]: 44/52 looper letters, 582 selfloop transitions, 352 changer transitions 0/934 dead transitions. [2023-11-17 12:14:47,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 934 transitions, 15687 flow [2023-11-17 12:14:47,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:14:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:14:47,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2023-11-17 12:14:47,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34615384615384615 [2023-11-17 12:14:47,642 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 180 transitions. [2023-11-17 12:14:47,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 180 transitions. [2023-11-17 12:14:47,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:47,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 180 transitions. [2023-11-17 12:14:47,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 18.0) internal successors, (180), 10 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,645 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 52.0) internal successors, (572), 11 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:47,645 INFO L175 Difference]: Start difference. First operand has 146 places, 498 transitions, 7742 flow. Second operand 10 states and 180 transitions. [2023-11-17 12:14:47,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 934 transitions, 15687 flow [2023-11-17 12:14:49,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 934 transitions, 15463 flow, removed 112 selfloop flow, removed 0 redundant places. [2023-11-17 12:14:49,289 INFO L231 Difference]: Finished difference. Result has 161 places, 643 transitions, 10916 flow [2023-11-17 12:14:49,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=7614, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10916, PETRI_PLACES=161, PETRI_TRANSITIONS=643} [2023-11-17 12:14:49,290 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 123 predicate places. [2023-11-17 12:14:49,290 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 643 transitions, 10916 flow [2023-11-17 12:14:49,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:49,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:49,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:49,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:14:49,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:49,491 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:49,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:49,492 INFO L85 PathProgramCache]: Analyzing trace with hash -441725837, now seen corresponding path program 7 times [2023-11-17 12:14:49,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:49,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450143840] [2023-11-17 12:14:49,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:49,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:49,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:49,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:49,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450143840] [2023-11-17 12:14:49,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450143840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:14:49,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:14:49,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:14:49,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932492093] [2023-11-17 12:14:49,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:14:49,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:14:49,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:49,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:14:49,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:14:49,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:14:49,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 643 transitions, 10916 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:49,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:49,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:14:49,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:14:52,380 INFO L124 PetriNetUnfolderBase]: 12721/17358 cut-off events. [2023-11-17 12:14:52,380 INFO L125 PetriNetUnfolderBase]: For 262160/262160 co-relation queries the response was YES. [2023-11-17 12:14:52,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121797 conditions, 17358 events. 12721/17358 cut-off events. For 262160/262160 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 88710 event pairs, 1630 based on Foata normal form. 216/17574 useless extension candidates. Maximal degree in co-relation 119438. Up to 9311 conditions per place. [2023-11-17 12:14:52,512 INFO L140 encePairwiseOnDemand]: 47/52 looper letters, 577 selfloop transitions, 253 changer transitions 9/839 dead transitions. [2023-11-17 12:14:52,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 839 transitions, 15445 flow [2023-11-17 12:14:52,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:14:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:14:52,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2023-11-17 12:14:52,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2023-11-17 12:14:52,514 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 96 transitions. [2023-11-17 12:14:52,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 96 transitions. [2023-11-17 12:14:52,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:14:52,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 96 transitions. [2023-11-17 12:14:52,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 52.0) internal successors, (312), 6 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:52,515 INFO L175 Difference]: Start difference. First operand has 161 places, 643 transitions, 10916 flow. Second operand 5 states and 96 transitions. [2023-11-17 12:14:52,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 839 transitions, 15445 flow [2023-11-17 12:14:54,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 839 transitions, 15227 flow, removed 109 selfloop flow, removed 0 redundant places. [2023-11-17 12:14:54,530 INFO L231 Difference]: Finished difference. Result has 165 places, 646 transitions, 11325 flow [2023-11-17 12:14:54,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10758, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=11325, PETRI_PLACES=165, PETRI_TRANSITIONS=646} [2023-11-17 12:14:54,531 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 127 predicate places. [2023-11-17 12:14:54,531 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 646 transitions, 11325 flow [2023-11-17 12:14:54,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:54,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:14:54,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:14:54,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-17 12:14:54,532 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:14:54,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:14:54,532 INFO L85 PathProgramCache]: Analyzing trace with hash -266950832, now seen corresponding path program 1 times [2023-11-17 12:14:54,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:14:54,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378123761] [2023-11-17 12:14:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:54,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:14:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:54,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:14:54,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:14:54,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378123761] [2023-11-17 12:14:54,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378123761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:14:54,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032994207] [2023-11-17 12:14:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:14:54,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:14:54,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:14:54,717 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) [2023-11-17 12:14:54,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:14:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:14:54,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 12:14:54,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:14:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:54,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:14:54,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:14:54,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032994207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:14:54,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:14:54,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-11-17 12:14:54,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375556574] [2023-11-17 12:14:54,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:14:54,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-17 12:14:54,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:14:54,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-17 12:14:54,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-17 12:14:54,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 52 [2023-11-17 12:14:54,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 646 transitions, 11325 flow. Second operand has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:14:54,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:14:54,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 52 [2023-11-17 12:14:54,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:03,914 INFO L124 PetriNetUnfolderBase]: 38575/52306 cut-off events. [2023-11-17 12:15:03,914 INFO L125 PetriNetUnfolderBase]: For 705388/705388 co-relation queries the response was YES. [2023-11-17 12:15:04,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364136 conditions, 52306 events. 38575/52306 cut-off events. For 705388/705388 co-relation queries the response was YES. Maximal size of possible extension queue 2084. Compared 307925 event pairs, 2213 based on Foata normal form. 798/53104 useless extension candidates. Maximal degree in co-relation 355752. Up to 27519 conditions per place. [2023-11-17 12:15:04,480 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 990 selfloop transitions, 947 changer transitions 8/1945 dead transitions. [2023-11-17 12:15:04,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 1945 transitions, 37602 flow [2023-11-17 12:15:04,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:15:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:15:04,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2023-11-17 12:15:04,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745192307692307 [2023-11-17 12:15:04,482 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 239 transitions. [2023-11-17 12:15:04,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 239 transitions. [2023-11-17 12:15:04,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:04,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 239 transitions. [2023-11-17 12:15:04,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 29.875) internal successors, (239), 8 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:04,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:04,491 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 52.0) internal successors, (468), 9 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:04,491 INFO L175 Difference]: Start difference. First operand has 165 places, 646 transitions, 11325 flow. Second operand 8 states and 239 transitions. [2023-11-17 12:15:04,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 1945 transitions, 37602 flow [2023-11-17 12:15:14,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 1945 transitions, 34073 flow, removed 497 selfloop flow, removed 13 redundant places. [2023-11-17 12:15:14,090 INFO L231 Difference]: Finished difference. Result has 162 places, 1544 transitions, 29220 flow [2023-11-17 12:15:14,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=10326, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=29220, PETRI_PLACES=162, PETRI_TRANSITIONS=1544} [2023-11-17 12:15:14,091 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 124 predicate places. [2023-11-17 12:15:14,091 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 1544 transitions, 29220 flow [2023-11-17 12:15:14,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.777777777777779) internal successors, (142), 9 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:14,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:14,091 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:14,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:14,304 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,SelfDestructingSolverStorable31 [2023-11-17 12:15:14,305 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:15:14,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:14,305 INFO L85 PathProgramCache]: Analyzing trace with hash -731781472, now seen corresponding path program 2 times [2023-11-17 12:15:14,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:14,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648144546] [2023-11-17 12:15:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:14,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:14,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:14,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648144546] [2023-11-17 12:15:14,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648144546] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:14,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735277366] [2023-11-17 12:15:14,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:15:14,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:14,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:14,389 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) [2023-11-17 12:15:14,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:15:14,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:15:14,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:14,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:14,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:14,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:14,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735277366] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:14,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:14,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:14,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658281895] [2023-11-17 12:15:14,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:14,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:14,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:14,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:14,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:14,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:15:14,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 1544 transitions, 29220 flow. Second operand has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:14,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:14,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:15:14,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:15:30,212 INFO L124 PetriNetUnfolderBase]: 53483/70754 cut-off events. [2023-11-17 12:15:30,212 INFO L125 PetriNetUnfolderBase]: For 980562/980562 co-relation queries the response was YES. [2023-11-17 12:15:30,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 514165 conditions, 70754 events. 53483/70754 cut-off events. For 980562/980562 co-relation queries the response was YES. Maximal size of possible extension queue 2842. Compared 408952 event pairs, 6020 based on Foata normal form. 1466/72220 useless extension candidates. Maximal degree in co-relation 488883. Up to 36699 conditions per place. [2023-11-17 12:15:31,149 INFO L140 encePairwiseOnDemand]: 46/52 looper letters, 2673 selfloop transitions, 491 changer transitions 33/3197 dead transitions. [2023-11-17 12:15:31,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 3197 transitions, 63784 flow [2023-11-17 12:15:31,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:15:31,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:15:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 226 transitions. [2023-11-17 12:15:31,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343195266272189 [2023-11-17 12:15:31,150 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 226 transitions. [2023-11-17 12:15:31,150 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 226 transitions. [2023-11-17 12:15:31,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:15:31,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 226 transitions. [2023-11-17 12:15:31,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 17.384615384615383) internal successors, (226), 13 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 52.0) internal successors, (728), 14 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,152 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 52.0) internal successors, (728), 14 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:31,152 INFO L175 Difference]: Start difference. First operand has 162 places, 1544 transitions, 29220 flow. Second operand 13 states and 226 transitions. [2023-11-17 12:15:31,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 3197 transitions, 63784 flow [2023-11-17 12:15:46,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 3197 transitions, 57462 flow, removed 3161 selfloop flow, removed 0 redundant places. [2023-11-17 12:15:47,042 INFO L231 Difference]: Finished difference. Result has 180 places, 1736 transitions, 30284 flow [2023-11-17 12:15:47,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=26512, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=320, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=30284, PETRI_PLACES=180, PETRI_TRANSITIONS=1736} [2023-11-17 12:15:47,044 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 142 predicate places. [2023-11-17 12:15:47,044 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 1736 transitions, 30284 flow [2023-11-17 12:15:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:15:47,045 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:15:47,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:15:47,250 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,SelfDestructingSolverStorable32 [2023-11-17 12:15:47,251 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:15:47,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:15:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1193856106, now seen corresponding path program 3 times [2023-11-17 12:15:47,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:15:47,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446358484] [2023-11-17 12:15:47,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:15:47,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:15:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:15:47,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 12:15:47,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:15:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446358484] [2023-11-17 12:15:47,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446358484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:15:47,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520985554] [2023-11-17 12:15:47,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:15:47,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:15:47,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:15:47,344 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) [2023-11-17 12:15:47,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:15:47,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:15:47,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:15:47,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:15:47,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:15:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:47,523 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:15:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:15:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520985554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:15:47,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:15:47,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:15:47,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043389482] [2023-11-17 12:15:47,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:15:47,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:15:47,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:15:47,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:15:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:15:47,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:15:47,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 1736 transitions, 30284 flow. Second operand has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:15:47,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:15:47,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:15:47,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:16:17,402 INFO L124 PetriNetUnfolderBase]: 86426/114259 cut-off events. [2023-11-17 12:16:17,402 INFO L125 PetriNetUnfolderBase]: For 1421613/1421613 co-relation queries the response was YES. [2023-11-17 12:16:18,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825118 conditions, 114259 events. 86426/114259 cut-off events. For 1421613/1421613 co-relation queries the response was YES. Maximal size of possible extension queue 4559. Compared 693949 event pairs, 5053 based on Foata normal form. 4022/118281 useless extension candidates. Maximal degree in co-relation 782107. Up to 32809 conditions per place. [2023-11-17 12:16:18,967 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 3197 selfloop transitions, 953 changer transitions 0/4150 dead transitions. [2023-11-17 12:16:18,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 4150 transitions, 76880 flow [2023-11-17 12:16:18,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:16:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:16:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 400 transitions. [2023-11-17 12:16:18,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34965034965034963 [2023-11-17 12:16:18,969 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 400 transitions. [2023-11-17 12:16:18,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 400 transitions. [2023-11-17 12:16:18,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:16:18,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 400 transitions. [2023-11-17 12:16:18,970 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 18.181818181818183) internal successors, (400), 22 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,972 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 52.0) internal successors, (1196), 23 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:16:18,972 INFO L175 Difference]: Start difference. First operand has 180 places, 1736 transitions, 30284 flow. Second operand 22 states and 400 transitions. [2023-11-17 12:16:18,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 4150 transitions, 76880 flow [2023-11-17 12:17:26,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 4150 transitions, 75687 flow, removed 149 selfloop flow, removed 3 redundant places. [2023-11-17 12:17:26,297 INFO L231 Difference]: Finished difference. Result has 217 places, 2330 transitions, 43642 flow [2023-11-17 12:17:26,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=29624, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=393, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=43642, PETRI_PLACES=217, PETRI_TRANSITIONS=2330} [2023-11-17 12:17:26,299 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 179 predicate places. [2023-11-17 12:17:26,299 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 2330 transitions, 43642 flow [2023-11-17 12:17:26,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.583333333333334) internal successors, (115), 12 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:26,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:17:26,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:17:26,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:17:26,506 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,SelfDestructingSolverStorable33 [2023-11-17 12:17:26,507 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-11-17 12:17:26,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:17:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1182097016, now seen corresponding path program 4 times [2023-11-17 12:17:26,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:17:26,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655071559] [2023-11-17 12:17:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:17:26,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:17:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:17:26,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:17:26,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:17:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655071559] [2023-11-17 12:17:26,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655071559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:17:26,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670013848] [2023-11-17 12:17:26,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:17:26,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:17:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:17:26,578 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) [2023-11-17 12:17:26,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:17:26,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:17:26,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:17:26,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:17:26,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:17:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:17:26,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:17:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:17:26,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670013848] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:17:26,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:17:26,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:17:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682264755] [2023-11-17 12:17:26,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:17:26,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:17:26,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:17:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:17:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:17:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 52 [2023-11-17 12:17:26,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 2330 transitions, 43642 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:17:26,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:17:26,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 52 [2023-11-17 12:17:26,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand