/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 -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:20:53,292 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:20:53,383 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 16:20:53,413 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:20:53,413 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:20:53,414 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:20:53,415 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:20:53,415 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:20:53,415 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:20:53,419 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:20:53,420 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:20:53,420 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:20:53,420 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:20:53,421 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:20:53,421 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:20:53,422 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:20:53,422 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:20:53,422 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:20:53,422 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:20:53,422 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:20:53,422 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:20:53,423 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:20:53,423 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:20:53,424 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:20:53,424 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:20:53,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:20:53,424 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:20:53,425 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:20:53,425 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:20:53,425 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:20:53,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:20:53,426 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:20:53,426 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:20:53,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:20:53,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:20:53,716 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:20:53,718 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:20:53,718 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:20:53,719 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-11-17 16:20:54,971 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:20:55,206 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:20:55,207 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-11-17 16:20:55,214 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a99f331d3/c3ec710cfbbb4ebf9de9f88fcd3c1599/FLAGf6e8f96f8 [2023-11-17 16:20:55,233 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a99f331d3/c3ec710cfbbb4ebf9de9f88fcd3c1599 [2023-11-17 16:20:55,236 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:20:55,237 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:20:55,240 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:20:55,241 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:20:55,245 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:20:55,245 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,246 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69099664 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55, skipping insertion in model container [2023-11-17 16:20:55,246 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,276 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:20:55,419 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-more-max-array.wvr.c[2592,2605] [2023-11-17 16:20:55,427 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:20:55,435 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:20:55,454 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-more-max-array.wvr.c[2592,2605] [2023-11-17 16:20:55,457 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:20:55,464 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:20:55,465 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:20:55,470 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:20:55,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55 WrapperNode [2023-11-17 16:20:55,471 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:20:55,472 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:20:55,472 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:20:55,472 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:20:55,477 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,488 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,511 INFO L138 Inliner]: procedures = 24, calls = 43, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 104 [2023-11-17 16:20:55,511 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:20:55,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:20:55,512 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:20:55,512 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:20:55,520 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,524 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,532 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,538 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,539 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,542 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:20:55,543 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:20:55,543 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:20:55,543 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:20:55,544 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (1/1) ... [2023-11-17 16:20:55,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:20:55,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:20:55,569 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 16:20:55,572 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 16:20:55,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:20:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:20:55,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:20:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:20:55,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:20:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 16:20:55,592 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 16:20:55,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:20:55,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:20:55,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:20:55,595 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 16:20:55,690 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:20:55,692 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:20:55,926 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:20:56,032 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:20:56,037 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 16:20:56,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:20:56 BoogieIcfgContainer [2023-11-17 16:20:56,038 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:20:56,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:20:56,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:20:56,043 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:20:56,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:20:55" (1/3) ... [2023-11-17 16:20:56,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70161325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:20:56, skipping insertion in model container [2023-11-17 16:20:56,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:20:55" (2/3) ... [2023-11-17 16:20:56,046 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70161325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:20:56, skipping insertion in model container [2023-11-17 16:20:56,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:20:56" (3/3) ... [2023-11-17 16:20:56,047 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-11-17 16:20:56,064 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:20:56,064 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:20:56,065 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:20:56,145 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 16:20:56,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 159 transitions, 339 flow [2023-11-17 16:20:56,271 INFO L124 PetriNetUnfolderBase]: 12/156 cut-off events. [2023-11-17 16:20:56,271 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:20:56,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169 conditions, 156 events. 12/156 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 102 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-17 16:20:56,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 159 transitions, 339 flow [2023-11-17 16:20:56,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 145 transitions, 308 flow [2023-11-17 16:20:56,285 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:20:56,303 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-17 16:20:56,306 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 145 transitions, 308 flow [2023-11-17 16:20:56,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 145 transitions, 308 flow [2023-11-17 16:20:56,341 INFO L124 PetriNetUnfolderBase]: 12/145 cut-off events. [2023-11-17 16:20:56,342 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:20:56,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158 conditions, 145 events. 12/145 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 101 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 116. Up to 2 conditions per place. [2023-11-17 16:20:56,344 INFO L119 LiptonReduction]: Number of co-enabled transitions 1728 [2023-11-17 16:21:00,798 INFO L134 LiptonReduction]: Checked pairs total: 1847 [2023-11-17 16:21:00,798 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-11-17 16:21:00,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:21:00,818 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;@7ae2d25c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:21:00,818 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 16:21:00,823 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:21:00,824 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-17 16:21:00,824 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 16:21:00,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:00,825 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] [2023-11-17 16:21:00,825 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 1 more)] === [2023-11-17 16:21:00,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:00,830 INFO L85 PathProgramCache]: Analyzing trace with hash -829075819, now seen corresponding path program 1 times [2023-11-17 16:21:00,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:00,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759770977] [2023-11-17 16:21:00,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:00,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:01,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:01,248 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 16:21:01,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:01,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759770977] [2023-11-17 16:21:01,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759770977] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:21:01,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:21:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 16:21:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700575758] [2023-11-17 16:21:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:21:01,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:21:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:21:01,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:21:01,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 305 [2023-11-17 16:21:01,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 16:21:01,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:01,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 305 [2023-11-17 16:21:01,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:01,422 INFO L124 PetriNetUnfolderBase]: 429/632 cut-off events. [2023-11-17 16:21:01,423 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-11-17 16:21:01,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1341 conditions, 632 events. 429/632 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2019 event pairs, 138 based on Foata normal form. 1/468 useless extension candidates. Maximal degree in co-relation 1030. Up to 389 conditions per place. [2023-11-17 16:21:01,432 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 38 selfloop transitions, 4 changer transitions 1/43 dead transitions. [2023-11-17 16:21:01,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 43 transitions, 205 flow [2023-11-17 16:21:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:21:01,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:21:01,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 458 transitions. [2023-11-17 16:21:01,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5005464480874317 [2023-11-17 16:21:01,453 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 458 transitions. [2023-11-17 16:21:01,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 458 transitions. [2023-11-17 16:21:01,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:01,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 458 transitions. [2023-11-17 16:21:01,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 16:21:01,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 16:21:01,471 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 16:21:01,473 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 458 transitions. [2023-11-17 16:21:01,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 43 transitions, 205 flow [2023-11-17 16:21:01,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 43 transitions, 183 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 16:21:01,480 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-11-17 16:21:01,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-11-17 16:21:01,486 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-17 16:21:01,487 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-11-17 16:21:01,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 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 16:21:01,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:01,488 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] [2023-11-17 16:21:01,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:21:01,489 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 1 more)] === [2023-11-17 16:21:01,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:01,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1731679178, now seen corresponding path program 1 times [2023-11-17 16:21:01,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:01,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93745481] [2023-11-17 16:21:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:01,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:01,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:01,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93745481] [2023-11-17 16:21:01,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93745481] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:21:01,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:21:01,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:21:01,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159321108] [2023-11-17 16:21:01,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:21:01,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:21:01,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:01,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:21:01,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:21:01,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 305 [2023-11-17 16:21:01,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:01,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:01,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 305 [2023-11-17 16:21:01,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:01,801 INFO L124 PetriNetUnfolderBase]: 429/633 cut-off events. [2023-11-17 16:21:01,802 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-11-17 16:21:01,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1541 conditions, 633 events. 429/633 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1875 event pairs, 276 based on Foata normal form. 0/632 useless extension candidates. Maximal degree in co-relation 544. Up to 633 conditions per place. [2023-11-17 16:21:01,806 INFO L140 encePairwiseOnDemand]: 302/305 looper letters, 26 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2023-11-17 16:21:01,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 28 transitions, 138 flow [2023-11-17 16:21:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:21:01,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:21:01,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 386 transitions. [2023-11-17 16:21:01,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42185792349726775 [2023-11-17 16:21:01,809 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 386 transitions. [2023-11-17 16:21:01,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 386 transitions. [2023-11-17 16:21:01,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:01,810 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 386 transitions. [2023-11-17 16:21:01,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 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 16:21:01,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 16:21:01,813 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 305.0) internal successors, (1220), 4 states have internal predecessors, (1220), 0 states have call successors, (0), 0 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 16:21:01,814 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 3 states and 386 transitions. [2023-11-17 16:21:01,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 28 transitions, 138 flow [2023-11-17 16:21:01,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 134 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 16:21:01,816 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 88 flow [2023-11-17 16:21:01,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-11-17 16:21:01,817 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -1 predicate places. [2023-11-17 16:21:01,817 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 88 flow [2023-11-17 16:21:01,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:01,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:01,819 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] [2023-11-17 16:21:01,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:21:01,822 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 1 more)] === [2023-11-17 16:21:01,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash -226678984, now seen corresponding path program 1 times [2023-11-17 16:21:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:01,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533822073] [2023-11-17 16:21:01,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:01,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:21:01,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:01,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533822073] [2023-11-17 16:21:01,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533822073] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:21:01,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:21:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 16:21:01,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063784221] [2023-11-17 16:21:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:21:01,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 16:21:01,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:01,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 16:21:01,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 16:21:01,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 305 [2023-11-17 16:21:01,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 16:21:01,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:01,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 305 [2023-11-17 16:21:01,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:02,072 INFO L124 PetriNetUnfolderBase]: 424/625 cut-off events. [2023-11-17 16:21:02,072 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-17 16:21:02,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1473 conditions, 625 events. 424/625 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1868 event pairs, 186 based on Foata normal form. 50/674 useless extension candidates. Maximal degree in co-relation 1460. Up to 459 conditions per place. [2023-11-17 16:21:02,077 INFO L140 encePairwiseOnDemand]: 301/305 looper letters, 38 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2023-11-17 16:21:02,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 42 transitions, 212 flow [2023-11-17 16:21:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 16:21:02,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 16:21:02,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 537 transitions. [2023-11-17 16:21:02,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44016393442622953 [2023-11-17 16:21:02,079 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 537 transitions. [2023-11-17 16:21:02,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 537 transitions. [2023-11-17 16:21:02,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:02,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 537 transitions. [2023-11-17 16:21:02,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.25) internal successors, (537), 4 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 16:21:02,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 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 16:21:02,083 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 305.0) internal successors, (1525), 5 states have internal predecessors, (1525), 0 states have call successors, (0), 0 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 16:21:02,084 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 88 flow. Second operand 4 states and 537 transitions. [2023-11-17 16:21:02,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 42 transitions, 212 flow [2023-11-17 16:21:02,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 206 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-17 16:21:02,086 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 101 flow [2023-11-17 16:21:02,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=101, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-11-17 16:21:02,088 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 16:21:02,088 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 101 flow [2023-11-17 16:21:02,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 130.5) internal successors, (522), 4 states have internal predecessors, (522), 0 states have call successors, (0), 0 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 16:21:02,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:02,089 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] [2023-11-17 16:21:02,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:21:02,089 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 1 more)] === [2023-11-17 16:21:02,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1057524325, now seen corresponding path program 1 times [2023-11-17 16:21:02,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:02,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722221097] [2023-11-17 16:21:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:02,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722221097] [2023-11-17 16:21:02,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722221097] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:02,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510486645] [2023-11-17 16:21:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:02,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:02,221 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 16:21:02,228 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 16:21:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:02,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 16:21:02,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:02,400 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:02,447 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 16:21:02,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510486645] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:02,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 16:21:02,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-11-17 16:21:02,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504332574] [2023-11-17 16:21:02,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:21:02,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 16:21:02,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:02,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 16:21:02,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-17 16:21:02,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 305 [2023-11-17 16:21:02,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 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 16:21:02,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:02,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 305 [2023-11-17 16:21:02,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:02,586 INFO L124 PetriNetUnfolderBase]: 410/599 cut-off events. [2023-11-17 16:21:02,586 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-11-17 16:21:02,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 599 events. 410/599 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1799 event pairs, 183 based on Foata normal form. 44/643 useless extension candidates. Maximal degree in co-relation 1603. Up to 452 conditions per place. [2023-11-17 16:21:02,590 INFO L140 encePairwiseOnDemand]: 300/305 looper letters, 39 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2023-11-17 16:21:02,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 44 transitions, 246 flow [2023-11-17 16:21:02,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 16:21:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 16:21:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 618 transitions. [2023-11-17 16:21:02,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40524590163934426 [2023-11-17 16:21:02,593 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 618 transitions. [2023-11-17 16:21:02,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 618 transitions. [2023-11-17 16:21:02,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:02,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 618 transitions. [2023-11-17 16:21:02,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.6) internal successors, (618), 5 states have internal predecessors, (618), 0 states have call successors, (0), 0 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 16:21:02,597 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 16:21:02,598 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 305.0) internal successors, (1830), 6 states have internal predecessors, (1830), 0 states have call successors, (0), 0 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 16:21:02,598 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 101 flow. Second operand 5 states and 618 transitions. [2023-11-17 16:21:02,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 44 transitions, 246 flow [2023-11-17 16:21:02,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 44 transitions, 230 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 16:21:02,603 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 113 flow [2023-11-17 16:21:02,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=113, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-11-17 16:21:02,604 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 5 predicate places. [2023-11-17 16:21:02,604 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 113 flow [2023-11-17 16:21:02,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.4) internal successors, (602), 5 states have internal predecessors, (602), 0 states have call successors, (0), 0 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 16:21:02,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:02,605 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] [2023-11-17 16:21:02,616 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 16:21:02,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:02,812 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 1 more)] === [2023-11-17 16:21:02,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:02,813 INFO L85 PathProgramCache]: Analyzing trace with hash -366924251, now seen corresponding path program 1 times [2023-11-17 16:21:02,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:02,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527236983] [2023-11-17 16:21:02,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:02,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:02,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:03,676 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 16:21:03,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527236983] [2023-11-17 16:21:03,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527236983] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:03,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493883661] [2023-11-17 16:21:03,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:03,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:03,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:03,679 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 16:21:03,704 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 16:21:03,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:03,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 16:21:03,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:03,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-17 16:21:03,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-17 16:21:04,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:21:04,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-17 16:21:04,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:21:04,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-17 16:21:04,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 30 [2023-11-17 16:21:04,406 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 16:21:04,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:04,548 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_~M~0)))) (and (forall ((v_ArrVal_112 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_112) c_~A~0.base) .cse1))) (or (< .cse0 (+ c_~max2~0 1)) (= c_~max1~0 .cse0)))) (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_112 (Array Int Int))) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_112) c_~A~0.base) .cse1)))))) is different from false [2023-11-17 16:21:05,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:05,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 74 [2023-11-17 16:21:05,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:05,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1056 treesize of output 948 [2023-11-17 16:21:05,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 231 [2023-11-17 16:21:05,352 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:05,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 168 [2023-11-17 16:21:05,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 93 [2023-11-17 16:21:05,929 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:05,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2023-11-17 16:21:05,934 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:21:05,935 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:21:05,942 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:21:05,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 68 [2023-11-17 16:21:05,954 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:21:05,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2023-11-17 16:21:05,977 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:05,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 55 [2023-11-17 16:21:05,981 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:21:05,982 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:21:05,989 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:21:05,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 64 [2023-11-17 16:21:06,009 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:21:06,009 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 28 [2023-11-17 16:21:06,029 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:06,030 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 43 [2023-11-17 16:21:06,034 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:21:06,035 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-17 16:21:06,043 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:21:06,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2023-11-17 16:21:06,060 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-17 16:21:06,060 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2023-11-17 16:21:06,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-11-17 16:21:06,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493883661] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:06,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:06,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 23 [2023-11-17 16:21:06,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465414499] [2023-11-17 16:21:06,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:06,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:21:06,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:06,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:21:06,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=445, Unknown=10, NotChecked=44, Total=600 [2023-11-17 16:21:06,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 305 [2023-11-17 16:21:06,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 113 flow. Second operand has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 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 16:21:06,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:06,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 305 [2023-11-17 16:21:06,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:07,105 INFO L124 PetriNetUnfolderBase]: 747/1095 cut-off events. [2023-11-17 16:21:07,106 INFO L125 PetriNetUnfolderBase]: For 570/570 co-relation queries the response was YES. [2023-11-17 16:21:07,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3135 conditions, 1095 events. 747/1095 cut-off events. For 570/570 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3965 event pairs, 58 based on Foata normal form. 1/1094 useless extension candidates. Maximal degree in co-relation 2725. Up to 647 conditions per place. [2023-11-17 16:21:07,113 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 80 selfloop transitions, 23 changer transitions 1/104 dead transitions. [2023-11-17 16:21:07,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 104 transitions, 550 flow [2023-11-17 16:21:07,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:21:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:21:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 923 transitions. [2023-11-17 16:21:07,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026229508196721 [2023-11-17 16:21:07,116 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 923 transitions. [2023-11-17 16:21:07,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 923 transitions. [2023-11-17 16:21:07,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:07,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 923 transitions. [2023-11-17 16:21:07,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.3) internal successors, (923), 10 states have internal predecessors, (923), 0 states have call successors, (0), 0 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 16:21:07,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 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 16:21:07,124 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 305.0) internal successors, (3355), 11 states have internal predecessors, (3355), 0 states have call successors, (0), 0 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 16:21:07,124 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 113 flow. Second operand 10 states and 923 transitions. [2023-11-17 16:21:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 104 transitions, 550 flow [2023-11-17 16:21:07,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 104 transitions, 534 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 16:21:07,127 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 262 flow [2023-11-17 16:21:07,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=262, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2023-11-17 16:21:07,128 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 15 predicate places. [2023-11-17 16:21:07,128 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 262 flow [2023-11-17 16:21:07,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 84.32) internal successors, (2108), 25 states have internal predecessors, (2108), 0 states have call successors, (0), 0 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 16:21:07,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:07,129 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] [2023-11-17 16:21:07,137 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 16:21:07,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:07,335 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 1 more)] === [2023-11-17 16:21:07,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -824596411, now seen corresponding path program 2 times [2023-11-17 16:21:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508780111] [2023-11-17 16:21:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:07,802 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 16:21:07,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:07,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508780111] [2023-11-17 16:21:07,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508780111] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:07,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956180743] [2023-11-17 16:21:07,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:21:07,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:07,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:07,804 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 16:21:07,810 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 16:21:07,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:21:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:07,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:21:07,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:08,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 16:21:08,262 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 16:21:08,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:08,359 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:08,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-17 16:21:08,523 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 16:21:08,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956180743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:08,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:08,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-17 16:21:08,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167969523] [2023-11-17 16:21:08,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:08,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:21:08,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:08,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:21:08,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:21:08,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 305 [2023-11-17 16:21:08,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 262 flow. Second operand has 23 states, 23 states have (on average 91.8695652173913) internal successors, (2113), 23 states have internal predecessors, (2113), 0 states have call successors, (0), 0 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 16:21:08,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:08,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 305 [2023-11-17 16:21:08,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:09,230 INFO L124 PetriNetUnfolderBase]: 913/1342 cut-off events. [2023-11-17 16:21:09,230 INFO L125 PetriNetUnfolderBase]: For 1533/1533 co-relation queries the response was YES. [2023-11-17 16:21:09,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4496 conditions, 1342 events. 913/1342 cut-off events. For 1533/1533 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4985 event pairs, 144 based on Foata normal form. 1/1342 useless extension candidates. Maximal degree in co-relation 3926. Up to 994 conditions per place. [2023-11-17 16:21:09,238 INFO L140 encePairwiseOnDemand]: 294/305 looper letters, 84 selfloop transitions, 55 changer transitions 1/140 dead transitions. [2023-11-17 16:21:09,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 140 transitions, 926 flow [2023-11-17 16:21:09,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:21:09,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:21:09,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1725 transitions. [2023-11-17 16:21:09,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31420765027322406 [2023-11-17 16:21:09,244 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1725 transitions. [2023-11-17 16:21:09,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1725 transitions. [2023-11-17 16:21:09,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:09,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1725 transitions. [2023-11-17 16:21:09,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.83333333333333) internal successors, (1725), 18 states have internal predecessors, (1725), 0 states have call successors, (0), 0 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 16:21:09,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 16:21:09,258 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 16:21:09,258 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 262 flow. Second operand 18 states and 1725 transitions. [2023-11-17 16:21:09,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 140 transitions, 926 flow [2023-11-17 16:21:09,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 140 transitions, 865 flow, removed 15 selfloop flow, removed 2 redundant places. [2023-11-17 16:21:09,266 INFO L231 Difference]: Finished difference. Result has 68 places, 94 transitions, 647 flow [2023-11-17 16:21:09,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=647, PETRI_PLACES=68, PETRI_TRANSITIONS=94} [2023-11-17 16:21:09,268 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 38 predicate places. [2023-11-17 16:21:09,268 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 94 transitions, 647 flow [2023-11-17 16:21:09,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.8695652173913) internal successors, (2113), 23 states have internal predecessors, (2113), 0 states have call successors, (0), 0 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 16:21:09,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:09,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:09,282 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:21:09,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:09,476 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 1 more)] === [2023-11-17 16:21:09,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:09,477 INFO L85 PathProgramCache]: Analyzing trace with hash -777747605, now seen corresponding path program 3 times [2023-11-17 16:21:09,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:09,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698392692] [2023-11-17 16:21:09,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:09,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:09,831 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 16:21:09,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:09,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698392692] [2023-11-17 16:21:09,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698392692] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:09,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22415612] [2023-11-17 16:21:09,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:21:09,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:09,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:09,838 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 16:21:09,864 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 16:21:09,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:21:09,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:09,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:21:09,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:10,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 16:21:10,267 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 16:21:10,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:10,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:10,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-17 16:21:10,477 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 16:21:10,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22415612] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:10,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:10,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-17 16:21:10,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363626189] [2023-11-17 16:21:10,478 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:10,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:21:10,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:10,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:21:10,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:21:10,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 305 [2023-11-17 16:21:10,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 94 transitions, 647 flow. Second operand has 22 states, 22 states have (on average 91.77272727272727) internal successors, (2019), 22 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 16:21:10,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:10,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 305 [2023-11-17 16:21:10,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:11,110 INFO L124 PetriNetUnfolderBase]: 1103/1617 cut-off events. [2023-11-17 16:21:11,110 INFO L125 PetriNetUnfolderBase]: For 3375/3375 co-relation queries the response was YES. [2023-11-17 16:21:11,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6488 conditions, 1617 events. 1103/1617 cut-off events. For 3375/3375 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6224 event pairs, 183 based on Foata normal form. 1/1618 useless extension candidates. Maximal degree in co-relation 5542. Up to 1257 conditions per place. [2023-11-17 16:21:11,124 INFO L140 encePairwiseOnDemand]: 294/305 looper letters, 114 selfloop transitions, 84 changer transitions 1/199 dead transitions. [2023-11-17 16:21:11,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 199 transitions, 1601 flow [2023-11-17 16:21:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:21:11,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:21:11,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1921 transitions. [2023-11-17 16:21:11,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31491803278688524 [2023-11-17 16:21:11,131 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1921 transitions. [2023-11-17 16:21:11,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1921 transitions. [2023-11-17 16:21:11,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:11,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1921 transitions. [2023-11-17 16:21:11,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 96.05) internal successors, (1921), 20 states have internal predecessors, (1921), 0 states have call successors, (0), 0 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 16:21:11,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:11,145 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:11,145 INFO L175 Difference]: Start difference. First operand has 68 places, 94 transitions, 647 flow. Second operand 20 states and 1921 transitions. [2023-11-17 16:21:11,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 199 transitions, 1601 flow [2023-11-17 16:21:11,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 199 transitions, 1514 flow, removed 29 selfloop flow, removed 3 redundant places. [2023-11-17 16:21:11,164 INFO L231 Difference]: Finished difference. Result has 94 places, 140 transitions, 1204 flow [2023-11-17 16:21:11,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1204, PETRI_PLACES=94, PETRI_TRANSITIONS=140} [2023-11-17 16:21:11,165 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 64 predicate places. [2023-11-17 16:21:11,166 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 140 transitions, 1204 flow [2023-11-17 16:21:11,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 91.77272727272727) internal successors, (2019), 22 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 16:21:11,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:11,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:11,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 16:21:11,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:11,377 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 1 more)] === [2023-11-17 16:21:11,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:11,378 INFO L85 PathProgramCache]: Analyzing trace with hash -503537029, now seen corresponding path program 4 times [2023-11-17 16:21:11,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:11,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926066390] [2023-11-17 16:21:11,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:11,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:11,834 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 16:21:11,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926066390] [2023-11-17 16:21:11,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926066390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332942584] [2023-11-17 16:21:11,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:21:11,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:11,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:11,836 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 16:21:11,856 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 16:21:11,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:21:11,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:11,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:21:11,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:12,146 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 16:21:12,209 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 16:21:12,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:12,269 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:12,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-17 16:21:12,400 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 16:21:12,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332942584] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:12,401 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:12,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 21 [2023-11-17 16:21:12,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204358191] [2023-11-17 16:21:12,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:12,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:21:12,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:12,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:21:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:21:12,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 305 [2023-11-17 16:21:12,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 140 transitions, 1204 flow. Second operand has 23 states, 23 states have (on average 91.69565217391305) internal successors, (2109), 23 states have internal predecessors, (2109), 0 states have call successors, (0), 0 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 16:21:12,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:12,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 305 [2023-11-17 16:21:12,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:13,066 INFO L124 PetriNetUnfolderBase]: 1212/1783 cut-off events. [2023-11-17 16:21:13,067 INFO L125 PetriNetUnfolderBase]: For 4716/4716 co-relation queries the response was YES. [2023-11-17 16:21:13,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7851 conditions, 1783 events. 1212/1783 cut-off events. For 4716/4716 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7098 event pairs, 178 based on Foata normal form. 1/1772 useless extension candidates. Maximal degree in co-relation 7365. Up to 1380 conditions per place. [2023-11-17 16:21:13,081 INFO L140 encePairwiseOnDemand]: 294/305 looper letters, 110 selfloop transitions, 100 changer transitions 1/211 dead transitions. [2023-11-17 16:21:13,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 211 transitions, 1959 flow [2023-11-17 16:21:13,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:21:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:21:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1733 transitions. [2023-11-17 16:21:13,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3156648451730419 [2023-11-17 16:21:13,087 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1733 transitions. [2023-11-17 16:21:13,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1733 transitions. [2023-11-17 16:21:13,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:13,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1733 transitions. [2023-11-17 16:21:13,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 96.27777777777777) internal successors, (1733), 18 states have internal predecessors, (1733), 0 states have call successors, (0), 0 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 16:21:13,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 16:21:13,098 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 16:21:13,098 INFO L175 Difference]: Start difference. First operand has 94 places, 140 transitions, 1204 flow. Second operand 18 states and 1733 transitions. [2023-11-17 16:21:13,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 211 transitions, 1959 flow [2023-11-17 16:21:13,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 211 transitions, 1875 flow, removed 18 selfloop flow, removed 5 redundant places. [2023-11-17 16:21:13,139 INFO L231 Difference]: Finished difference. Result has 110 places, 156 transitions, 1539 flow [2023-11-17 16:21:13,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1126, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1539, PETRI_PLACES=110, PETRI_TRANSITIONS=156} [2023-11-17 16:21:13,140 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2023-11-17 16:21:13,140 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 156 transitions, 1539 flow [2023-11-17 16:21:13,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 91.69565217391305) internal successors, (2109), 23 states have internal predecessors, (2109), 0 states have call successors, (0), 0 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 16:21:13,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:13,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:13,150 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 16:21:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:13,348 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 1 more)] === [2023-11-17 16:21:13,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:13,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1687359391, now seen corresponding path program 5 times [2023-11-17 16:21:13,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:13,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489756985] [2023-11-17 16:21:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:13,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:13,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:13,780 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 16:21:13,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:13,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489756985] [2023-11-17 16:21:13,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489756985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:13,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097674775] [2023-11-17 16:21:13,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:21:13,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:13,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:13,782 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 16:21:13,800 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 16:21:13,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:21:13,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:13,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:21:13,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:14,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:14,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-11-17 16:21:14,415 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 16:21:14,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:14,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:14,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2023-11-17 16:21:14,750 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 16:21:14,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097674775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:14,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:14,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-11-17 16:21:14,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128935280] [2023-11-17 16:21:14,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:14,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:21:14,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:14,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:21:14,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:21:14,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 305 [2023-11-17 16:21:14,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 156 transitions, 1539 flow. Second operand has 21 states, 21 states have (on average 95.95238095238095) internal successors, (2015), 21 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 16:21:14,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:14,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 305 [2023-11-17 16:21:14,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:16,848 INFO L124 PetriNetUnfolderBase]: 1812/2643 cut-off events. [2023-11-17 16:21:16,848 INFO L125 PetriNetUnfolderBase]: For 8953/8953 co-relation queries the response was YES. [2023-11-17 16:21:16,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12130 conditions, 2643 events. 1812/2643 cut-off events. For 8953/8953 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11188 event pairs, 184 based on Foata normal form. 2/2633 useless extension candidates. Maximal degree in co-relation 11389. Up to 1633 conditions per place. [2023-11-17 16:21:16,880 INFO L140 encePairwiseOnDemand]: 294/305 looper letters, 193 selfloop transitions, 177 changer transitions 5/375 dead transitions. [2023-11-17 16:21:16,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 375 transitions, 3620 flow [2023-11-17 16:21:16,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 16:21:16,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 16:21:16,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3515 transitions. [2023-11-17 16:21:16,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32927400468384077 [2023-11-17 16:21:16,892 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3515 transitions. [2023-11-17 16:21:16,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3515 transitions. [2023-11-17 16:21:16,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:16,895 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3515 transitions. [2023-11-17 16:21:16,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 100.42857142857143) internal successors, (3515), 35 states have internal predecessors, (3515), 0 states have call successors, (0), 0 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 16:21:16,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 305.0) internal successors, (10980), 36 states have internal predecessors, (10980), 0 states have call successors, (0), 0 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 16:21:16,933 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 305.0) internal successors, (10980), 36 states have internal predecessors, (10980), 0 states have call successors, (0), 0 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 16:21:16,933 INFO L175 Difference]: Start difference. First operand has 110 places, 156 transitions, 1539 flow. Second operand 35 states and 3515 transitions. [2023-11-17 16:21:16,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 375 transitions, 3620 flow [2023-11-17 16:21:16,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 375 transitions, 3507 flow, removed 25 selfloop flow, removed 7 redundant places. [2023-11-17 16:21:16,978 INFO L231 Difference]: Finished difference. Result has 139 places, 254 transitions, 2746 flow [2023-11-17 16:21:16,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=2746, PETRI_PLACES=139, PETRI_TRANSITIONS=254} [2023-11-17 16:21:16,979 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 109 predicate places. [2023-11-17 16:21:16,979 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 254 transitions, 2746 flow [2023-11-17 16:21:16,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 95.95238095238095) internal successors, (2015), 21 states have internal predecessors, (2015), 0 states have call successors, (0), 0 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 16:21:16,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:16,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:16,989 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 16:21:17,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:17,187 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 1 more)] === [2023-11-17 16:21:17,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:17,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1930080453, now seen corresponding path program 6 times [2023-11-17 16:21:17,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:17,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050589391] [2023-11-17 16:21:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:17,543 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 16:21:17,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:17,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050589391] [2023-11-17 16:21:17,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050589391] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:17,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375333434] [2023-11-17 16:21:17,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:21:17,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:17,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:17,545 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 16:21:17,546 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 16:21:17,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:21:17,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:17,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:21:17,646 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:17,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-11-17 16:21:17,885 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 16:21:17,885 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:17,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:17,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 49 [2023-11-17 16:21:18,077 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 16:21:18,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375333434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:18,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:18,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-11-17 16:21:18,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370493222] [2023-11-17 16:21:18,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:18,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:21:18,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:18,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:21:18,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:21:18,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 305 [2023-11-17 16:21:18,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 254 transitions, 2746 flow. Second operand has 22 states, 22 states have (on average 91.77272727272727) internal successors, (2019), 22 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 16:21:18,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:18,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 305 [2023-11-17 16:21:18,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:18,888 INFO L124 PetriNetUnfolderBase]: 1906/2782 cut-off events. [2023-11-17 16:21:18,888 INFO L125 PetriNetUnfolderBase]: For 10621/10621 co-relation queries the response was YES. [2023-11-17 16:21:18,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13792 conditions, 2782 events. 1906/2782 cut-off events. For 10621/10621 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11968 event pairs, 265 based on Foata normal form. 1/2771 useless extension candidates. Maximal degree in co-relation 13551. Up to 2409 conditions per place. [2023-11-17 16:21:18,914 INFO L140 encePairwiseOnDemand]: 294/305 looper letters, 193 selfloop transitions, 114 changer transitions 1/308 dead transitions. [2023-11-17 16:21:18,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 308 transitions, 3657 flow [2023-11-17 16:21:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:21:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:21:18,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1721 transitions. [2023-11-17 16:21:18,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3134790528233151 [2023-11-17 16:21:18,918 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1721 transitions. [2023-11-17 16:21:18,918 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1721 transitions. [2023-11-17 16:21:18,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:18,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1721 transitions. [2023-11-17 16:21:18,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 95.61111111111111) internal successors, (1721), 18 states have internal predecessors, (1721), 0 states have call successors, (0), 0 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 16:21:18,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 16:21:18,928 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 305.0) internal successors, (5795), 19 states have internal predecessors, (5795), 0 states have call successors, (0), 0 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 16:21:18,928 INFO L175 Difference]: Start difference. First operand has 139 places, 254 transitions, 2746 flow. Second operand 18 states and 1721 transitions. [2023-11-17 16:21:18,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 308 transitions, 3657 flow [2023-11-17 16:21:18,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 308 transitions, 2861 flow, removed 329 selfloop flow, removed 12 redundant places. [2023-11-17 16:21:19,003 INFO L231 Difference]: Finished difference. Result has 146 places, 263 transitions, 2362 flow [2023-11-17 16:21:19,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2362, PETRI_PLACES=146, PETRI_TRANSITIONS=263} [2023-11-17 16:21:19,003 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 116 predicate places. [2023-11-17 16:21:19,004 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 263 transitions, 2362 flow [2023-11-17 16:21:19,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 91.77272727272727) internal successors, (2019), 22 states have internal predecessors, (2019), 0 states have call successors, (0), 0 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 16:21:19,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:19,004 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] [2023-11-17 16:21:19,011 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 16:21:19,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:19,205 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 1 more)] === [2023-11-17 16:21:19,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:19,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1525200649, now seen corresponding path program 7 times [2023-11-17 16:21:19,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:19,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142448269] [2023-11-17 16:21:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:19,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:19,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:19,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:19,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142448269] [2023-11-17 16:21:19,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142448269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:19,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446751340] [2023-11-17 16:21:19,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:21:19,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:19,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:19,300 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 16:21:19,303 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 16:21:19,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:19,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:21:19,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:19,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:19,484 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:19,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446751340] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:19,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:21:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079129266] [2023-11-17 16:21:19,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:19,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:21:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:21:19,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:21:19,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 305 [2023-11-17 16:21:19,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 263 transitions, 2362 flow. Second operand has 14 states, 14 states have (on average 118.78571428571429) internal successors, (1663), 14 states have internal predecessors, (1663), 0 states have call successors, (0), 0 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 16:21:19,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:19,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 305 [2023-11-17 16:21:19,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:20,041 INFO L124 PetriNetUnfolderBase]: 2486/3728 cut-off events. [2023-11-17 16:21:20,041 INFO L125 PetriNetUnfolderBase]: For 11003/11003 co-relation queries the response was YES. [2023-11-17 16:21:20,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15213 conditions, 3728 events. 2486/3728 cut-off events. For 11003/11003 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 17987 event pairs, 531 based on Foata normal form. 152/3820 useless extension candidates. Maximal degree in co-relation 14865. Up to 1552 conditions per place. [2023-11-17 16:21:20,072 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 332 selfloop transitions, 48 changer transitions 0/380 dead transitions. [2023-11-17 16:21:20,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 380 transitions, 3771 flow [2023-11-17 16:21:20,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:21:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:21:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 883 transitions. [2023-11-17 16:21:20,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4135831381733021 [2023-11-17 16:21:20,075 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 883 transitions. [2023-11-17 16:21:20,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 883 transitions. [2023-11-17 16:21:20,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:20,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 883 transitions. [2023-11-17 16:21:20,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 126.14285714285714) internal successors, (883), 7 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:20,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 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 16:21:20,080 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 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 16:21:20,080 INFO L175 Difference]: Start difference. First operand has 146 places, 263 transitions, 2362 flow. Second operand 7 states and 883 transitions. [2023-11-17 16:21:20,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 380 transitions, 3771 flow [2023-11-17 16:21:20,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 380 transitions, 3486 flow, removed 37 selfloop flow, removed 15 redundant places. [2023-11-17 16:21:20,124 INFO L231 Difference]: Finished difference. Result has 140 places, 273 transitions, 2379 flow [2023-11-17 16:21:20,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2379, PETRI_PLACES=140, PETRI_TRANSITIONS=273} [2023-11-17 16:21:20,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2023-11-17 16:21:20,126 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 273 transitions, 2379 flow [2023-11-17 16:21:20,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 118.78571428571429) internal successors, (1663), 14 states have internal predecessors, (1663), 0 states have call successors, (0), 0 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 16:21:20,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:20,127 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] [2023-11-17 16:21:20,133 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 16:21:20,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-17 16:21:20,333 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 1 more)] === [2023-11-17 16:21:20,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:20,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1528979240, now seen corresponding path program 8 times [2023-11-17 16:21:20,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:20,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469860949] [2023-11-17 16:21:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:20,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:20,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469860949] [2023-11-17 16:21:20,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469860949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960149671] [2023-11-17 16:21:20,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:21:20,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:20,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:20,426 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 16:21:20,432 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 16:21:20,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:21:20,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:20,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:21:20,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:20,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:20,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:20,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960149671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:20,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:20,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-11-17 16:21:20,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286461647] [2023-11-17 16:21:20,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:20,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:21:20,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:20,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:21:20,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:21:20,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-11-17 16:21:20,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 273 transitions, 2379 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 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 16:21:20,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:20,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-11-17 16:21:20,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:21,716 INFO L124 PetriNetUnfolderBase]: 2532/3756 cut-off events. [2023-11-17 16:21:21,717 INFO L125 PetriNetUnfolderBase]: For 15872/15872 co-relation queries the response was YES. [2023-11-17 16:21:21,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16929 conditions, 3756 events. 2532/3756 cut-off events. For 15872/15872 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 17910 event pairs, 598 based on Foata normal form. 124/3834 useless extension candidates. Maximal degree in co-relation 16684. Up to 2176 conditions per place. [2023-11-17 16:21:21,745 INFO L140 encePairwiseOnDemand]: 293/305 looper letters, 348 selfloop transitions, 170 changer transitions 0/518 dead transitions. [2023-11-17 16:21:21,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 518 transitions, 4871 flow [2023-11-17 16:21:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:21:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:21:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2250 transitions. [2023-11-17 16:21:21,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36885245901639346 [2023-11-17 16:21:21,749 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2250 transitions. [2023-11-17 16:21:21,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2250 transitions. [2023-11-17 16:21:21,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:21,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2250 transitions. [2023-11-17 16:21:21,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.5) internal successors, (2250), 20 states have internal predecessors, (2250), 0 states have call successors, (0), 0 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 16:21:21,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:21,760 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:21,760 INFO L175 Difference]: Start difference. First operand has 140 places, 273 transitions, 2379 flow. Second operand 20 states and 2250 transitions. [2023-11-17 16:21:21,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 518 transitions, 4871 flow [2023-11-17 16:21:21,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 518 transitions, 4840 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-11-17 16:21:21,821 INFO L231 Difference]: Finished difference. Result has 167 places, 355 transitions, 3609 flow [2023-11-17 16:21:21,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2316, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3609, PETRI_PLACES=167, PETRI_TRANSITIONS=355} [2023-11-17 16:21:21,822 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 137 predicate places. [2023-11-17 16:21:21,822 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 355 transitions, 3609 flow [2023-11-17 16:21:21,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 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 16:21:21,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:21,822 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] [2023-11-17 16:21:21,829 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 16:21:22,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:22,029 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 1 more)] === [2023-11-17 16:21:22,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:22,029 INFO L85 PathProgramCache]: Analyzing trace with hash 850491016, now seen corresponding path program 9 times [2023-11-17 16:21:22,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:22,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056635079] [2023-11-17 16:21:22,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:22,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:22,136 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:22,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:22,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056635079] [2023-11-17 16:21:22,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056635079] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:22,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107920299] [2023-11-17 16:21:22,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:21:22,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:22,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:22,138 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 16:21:22,144 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 16:21:22,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:21:22,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:22,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-17 16:21:22,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:22,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107920299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:22,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-17 16:21:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501205873] [2023-11-17 16:21:22,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:22,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 16:21:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 16:21:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-11-17 16:21:22,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 305 [2023-11-17 16:21:22,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 355 transitions, 3609 flow. Second operand has 14 states, 14 states have (on average 115.21428571428571) internal successors, (1613), 14 states have internal predecessors, (1613), 0 states have call successors, (0), 0 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 16:21:22,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:22,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 305 [2023-11-17 16:21:22,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:22,904 INFO L124 PetriNetUnfolderBase]: 2036/3105 cut-off events. [2023-11-17 16:21:22,904 INFO L125 PetriNetUnfolderBase]: For 27160/27160 co-relation queries the response was YES. [2023-11-17 16:21:22,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17793 conditions, 3105 events. 2036/3105 cut-off events. For 27160/27160 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14798 event pairs, 635 based on Foata normal form. 166/3249 useless extension candidates. Maximal degree in co-relation 17718. Up to 1580 conditions per place. [2023-11-17 16:21:22,927 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 322 selfloop transitions, 29 changer transitions 19/370 dead transitions. [2023-11-17 16:21:22,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 370 transitions, 4428 flow [2023-11-17 16:21:22,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:21:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:21:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 855 transitions. [2023-11-17 16:21:22,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40046838407494145 [2023-11-17 16:21:22,929 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 855 transitions. [2023-11-17 16:21:22,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 855 transitions. [2023-11-17 16:21:22,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:22,930 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 855 transitions. [2023-11-17 16:21:22,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.14285714285714) internal successors, (855), 7 states have internal predecessors, (855), 0 states have call successors, (0), 0 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 16:21:22,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 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 16:21:22,933 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 305.0) internal successors, (2440), 8 states have internal predecessors, (2440), 0 states have call successors, (0), 0 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 16:21:22,933 INFO L175 Difference]: Start difference. First operand has 167 places, 355 transitions, 3609 flow. Second operand 7 states and 855 transitions. [2023-11-17 16:21:22,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 370 transitions, 4428 flow [2023-11-17 16:21:23,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 370 transitions, 3853 flow, removed 175 selfloop flow, removed 10 redundant places. [2023-11-17 16:21:23,051 INFO L231 Difference]: Finished difference. Result has 165 places, 306 transitions, 2791 flow [2023-11-17 16:21:23,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2809, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2791, PETRI_PLACES=165, PETRI_TRANSITIONS=306} [2023-11-17 16:21:23,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2023-11-17 16:21:23,053 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 306 transitions, 2791 flow [2023-11-17 16:21:23,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.21428571428571) internal successors, (1613), 14 states have internal predecessors, (1613), 0 states have call successors, (0), 0 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 16:21:23,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:23,053 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] [2023-11-17 16:21:23,064 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 16:21:23,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-17 16:21:23,259 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 1 more)] === [2023-11-17 16:21:23,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:23,259 INFO L85 PathProgramCache]: Analyzing trace with hash -732023758, now seen corresponding path program 1 times [2023-11-17 16:21:23,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:23,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460311935] [2023-11-17 16:21:23,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:23,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:21:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:23,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460311935] [2023-11-17 16:21:23,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460311935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:23,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378044913] [2023-11-17 16:21:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:23,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:23,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:23,347 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 16:21:23,369 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 16:21:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:23,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:21:23,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:21:23,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:23,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:21:23,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378044913] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:23,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:23,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 16:21:23,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663679633] [2023-11-17 16:21:23,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:23,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 16:21:23,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:23,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 16:21:23,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-11-17 16:21:23,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 305 [2023-11-17 16:21:23,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 306 transitions, 2791 flow. Second operand has 13 states, 13 states have (on average 114.38461538461539) internal successors, (1487), 13 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:23,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:23,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 305 [2023-11-17 16:21:23,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:23,949 INFO L124 PetriNetUnfolderBase]: 1603/2509 cut-off events. [2023-11-17 16:21:23,949 INFO L125 PetriNetUnfolderBase]: For 20996/20996 co-relation queries the response was YES. [2023-11-17 16:21:23,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14148 conditions, 2509 events. 1603/2509 cut-off events. For 20996/20996 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 12110 event pairs, 626 based on Foata normal form. 138/2637 useless extension candidates. Maximal degree in co-relation 13922. Up to 1580 conditions per place. [2023-11-17 16:21:23,965 INFO L140 encePairwiseOnDemand]: 299/305 looper letters, 213 selfloop transitions, 3 changer transitions 92/308 dead transitions. [2023-11-17 16:21:23,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 308 transitions, 3376 flow [2023-11-17 16:21:23,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 16:21:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 16:21:23,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 724 transitions. [2023-11-17 16:21:23,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39562841530054643 [2023-11-17 16:21:23,967 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 724 transitions. [2023-11-17 16:21:23,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 724 transitions. [2023-11-17 16:21:23,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:23,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 724 transitions. [2023-11-17 16:21:23,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 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 16:21:23,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 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 16:21:23,970 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 305.0) internal successors, (2135), 7 states have internal predecessors, (2135), 0 states have call successors, (0), 0 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 16:21:23,970 INFO L175 Difference]: Start difference. First operand has 165 places, 306 transitions, 2791 flow. Second operand 6 states and 724 transitions. [2023-11-17 16:21:23,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 308 transitions, 3376 flow [2023-11-17 16:21:24,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 308 transitions, 3318 flow, removed 10 selfloop flow, removed 6 redundant places. [2023-11-17 16:21:24,059 INFO L231 Difference]: Finished difference. Result has 162 places, 216 transitions, 1895 flow [2023-11-17 16:21:24,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2481, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1895, PETRI_PLACES=162, PETRI_TRANSITIONS=216} [2023-11-17 16:21:24,060 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 132 predicate places. [2023-11-17 16:21:24,060 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 216 transitions, 1895 flow [2023-11-17 16:21:24,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.38461538461539) internal successors, (1487), 13 states have internal predecessors, (1487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:21:24,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:24,061 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:24,071 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 16:21:24,266 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,SelfDestructingSolverStorable13 [2023-11-17 16:21:24,267 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 1 more)] === [2023-11-17 16:21:24,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:24,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1590764256, now seen corresponding path program 10 times [2023-11-17 16:21:24,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:24,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745237461] [2023-11-17 16:21:24,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:24,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745237461] [2023-11-17 16:21:24,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745237461] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:24,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394644904] [2023-11-17 16:21:24,386 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:21:24,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:24,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:24,389 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 16:21:24,395 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 16:21:24,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:21:24,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:24,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:21:24,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:24,551 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:24,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:24,618 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:24,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394644904] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:24,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:24,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-17 16:21:24,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527091882] [2023-11-17 16:21:24,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:24,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:21:24,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:24,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:21:24,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:21:24,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-11-17 16:21:24,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 216 transitions, 1895 flow. Second operand has 17 states, 17 states have (on average 106.41176470588235) internal successors, (1809), 17 states have internal predecessors, (1809), 0 states have call successors, (0), 0 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 16:21:24,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:24,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-11-17 16:21:24,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:25,283 INFO L124 PetriNetUnfolderBase]: 1179/1729 cut-off events. [2023-11-17 16:21:25,283 INFO L125 PetriNetUnfolderBase]: For 18405/18405 co-relation queries the response was YES. [2023-11-17 16:21:25,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10775 conditions, 1729 events. 1179/1729 cut-off events. For 18405/18405 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6947 event pairs, 123 based on Foata normal form. 18/1737 useless extension candidates. Maximal degree in co-relation 10719. Up to 719 conditions per place. [2023-11-17 16:21:25,300 INFO L140 encePairwiseOnDemand]: 293/305 looper letters, 191 selfloop transitions, 172 changer transitions 0/363 dead transitions. [2023-11-17 16:21:25,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 363 transitions, 3968 flow [2023-11-17 16:21:25,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:21:25,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:21:25,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2208 transitions. [2023-11-17 16:21:25,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3619672131147541 [2023-11-17 16:21:25,304 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2208 transitions. [2023-11-17 16:21:25,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2208 transitions. [2023-11-17 16:21:25,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:25,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2208 transitions. [2023-11-17 16:21:25,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.4) internal successors, (2208), 20 states have internal predecessors, (2208), 0 states have call successors, (0), 0 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 16:21:25,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:25,316 INFO L175 Difference]: Start difference. First operand has 162 places, 216 transitions, 1895 flow. Second operand 20 states and 2208 transitions. [2023-11-17 16:21:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 363 transitions, 3968 flow [2023-11-17 16:21:25,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 363 transitions, 3705 flow, removed 102 selfloop flow, removed 12 redundant places. [2023-11-17 16:21:25,382 INFO L231 Difference]: Finished difference. Result has 143 places, 266 transitions, 2915 flow [2023-11-17 16:21:25,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=1791, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2915, PETRI_PLACES=143, PETRI_TRANSITIONS=266} [2023-11-17 16:21:25,383 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 113 predicate places. [2023-11-17 16:21:25,383 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 266 transitions, 2915 flow [2023-11-17 16:21:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.41176470588235) internal successors, (1809), 17 states have internal predecessors, (1809), 0 states have call successors, (0), 0 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 16:21:25,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:25,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:25,395 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 16:21:25,589 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,SelfDestructingSolverStorable14 [2023-11-17 16:21:25,589 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 1 more)] === [2023-11-17 16:21:25,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1075306842, now seen corresponding path program 11 times [2023-11-17 16:21:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:25,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619898047] [2023-11-17 16:21:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:25,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:25,707 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:25,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:25,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619898047] [2023-11-17 16:21:25,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619898047] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:25,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216550954] [2023-11-17 16:21:25,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:21:25,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:25,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:25,712 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 16:21:25,737 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 16:21:25,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:21:25,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:25,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:21:25,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:25,890 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:25,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216550954] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:25,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:25,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-17 16:21:25,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056519775] [2023-11-17 16:21:25,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:25,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:21:25,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:25,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:21:25,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:21:25,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-11-17 16:21:25,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 266 transitions, 2915 flow. Second operand has 17 states, 17 states have (on average 106.52941176470588) internal successors, (1811), 17 states have internal predecessors, (1811), 0 states have call successors, (0), 0 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 16:21:25,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:25,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-11-17 16:21:25,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:26,650 INFO L124 PetriNetUnfolderBase]: 1204/1772 cut-off events. [2023-11-17 16:21:26,650 INFO L125 PetriNetUnfolderBase]: For 19201/19201 co-relation queries the response was YES. [2023-11-17 16:21:26,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11683 conditions, 1772 events. 1204/1772 cut-off events. For 19201/19201 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7178 event pairs, 121 based on Foata normal form. 18/1780 useless extension candidates. Maximal degree in co-relation 11612. Up to 735 conditions per place. [2023-11-17 16:21:26,663 INFO L140 encePairwiseOnDemand]: 293/305 looper letters, 192 selfloop transitions, 183 changer transitions 0/375 dead transitions. [2023-11-17 16:21:26,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 375 transitions, 4733 flow [2023-11-17 16:21:26,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:21:26,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:21:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2201 transitions. [2023-11-17 16:21:26,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3608196721311475 [2023-11-17 16:21:26,666 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2201 transitions. [2023-11-17 16:21:26,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2201 transitions. [2023-11-17 16:21:26,667 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:26,667 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2201 transitions. [2023-11-17 16:21:26,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.05) internal successors, (2201), 20 states have internal predecessors, (2201), 0 states have call successors, (0), 0 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 16:21:26,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:26,675 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:26,675 INFO L175 Difference]: Start difference. First operand has 143 places, 266 transitions, 2915 flow. Second operand 20 states and 2201 transitions. [2023-11-17 16:21:26,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 375 transitions, 4733 flow [2023-11-17 16:21:26,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 375 transitions, 4573 flow, removed 50 selfloop flow, removed 5 redundant places. [2023-11-17 16:21:26,753 INFO L231 Difference]: Finished difference. Result has 166 places, 305 transitions, 3856 flow [2023-11-17 16:21:26,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=2766, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3856, PETRI_PLACES=166, PETRI_TRANSITIONS=305} [2023-11-17 16:21:26,754 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 136 predicate places. [2023-11-17 16:21:26,754 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 305 transitions, 3856 flow [2023-11-17 16:21:26,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.52941176470588) internal successors, (1811), 17 states have internal predecessors, (1811), 0 states have call successors, (0), 0 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 16:21:26,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:26,754 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:26,760 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 16:21:26,960 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,SelfDestructingSolverStorable15 [2023-11-17 16:21:26,960 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 1 more)] === [2023-11-17 16:21:26,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:26,961 INFO L85 PathProgramCache]: Analyzing trace with hash 41659644, now seen corresponding path program 12 times [2023-11-17 16:21:26,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:26,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146003936] [2023-11-17 16:21:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:26,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:27,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:27,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146003936] [2023-11-17 16:21:27,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146003936] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:27,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000968286] [2023-11-17 16:21:27,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:21:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:27,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:27,076 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 16:21:27,098 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 16:21:27,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:21:27,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:27,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:21:27,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:27,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:27,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000968286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:27,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:27,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 16:21:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593234528] [2023-11-17 16:21:27,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:27,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:21:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:21:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:21:27,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 305 [2023-11-17 16:21:27,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 305 transitions, 3856 flow. Second operand has 20 states, 20 states have (on average 109.95) internal successors, (2199), 20 states have internal predecessors, (2199), 0 states have call successors, (0), 0 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 16:21:27,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:27,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 305 [2023-11-17 16:21:27,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:28,033 INFO L124 PetriNetUnfolderBase]: 1860/2700 cut-off events. [2023-11-17 16:21:28,034 INFO L125 PetriNetUnfolderBase]: For 38926/38926 co-relation queries the response was YES. [2023-11-17 16:21:28,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20279 conditions, 2700 events. 1860/2700 cut-off events. For 38926/38926 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 11487 event pairs, 257 based on Foata normal form. 18/2704 useless extension candidates. Maximal degree in co-relation 20198. Up to 1275 conditions per place. [2023-11-17 16:21:28,055 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 372 selfloop transitions, 164 changer transitions 0/536 dead transitions. [2023-11-17 16:21:28,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 536 transitions, 7455 flow [2023-11-17 16:21:28,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:21:28,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:21:28,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2214 transitions. [2023-11-17 16:21:28,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.382053494391717 [2023-11-17 16:21:28,059 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2214 transitions. [2023-11-17 16:21:28,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2214 transitions. [2023-11-17 16:21:28,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:28,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2214 transitions. [2023-11-17 16:21:28,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 116.52631578947368) internal successors, (2214), 19 states have internal predecessors, (2214), 0 states have call successors, (0), 0 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 16:21:28,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 305.0) internal successors, (6100), 20 states have internal predecessors, (6100), 0 states have call successors, (0), 0 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 16:21:28,067 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 305.0) internal successors, (6100), 20 states have internal predecessors, (6100), 0 states have call successors, (0), 0 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 16:21:28,067 INFO L175 Difference]: Start difference. First operand has 166 places, 305 transitions, 3856 flow. Second operand 19 states and 2214 transitions. [2023-11-17 16:21:28,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 536 transitions, 7455 flow [2023-11-17 16:21:28,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 536 transitions, 7144 flow, removed 113 selfloop flow, removed 7 redundant places. [2023-11-17 16:21:28,193 INFO L231 Difference]: Finished difference. Result has 180 places, 367 transitions, 4863 flow [2023-11-17 16:21:28,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=4863, PETRI_PLACES=180, PETRI_TRANSITIONS=367} [2023-11-17 16:21:28,193 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 150 predicate places. [2023-11-17 16:21:28,194 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 367 transitions, 4863 flow [2023-11-17 16:21:28,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 109.95) internal successors, (2199), 20 states have internal predecessors, (2199), 0 states have call successors, (0), 0 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 16:21:28,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:28,194 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:28,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:21:28,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:28,400 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 1 more)] === [2023-11-17 16:21:28,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:28,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1053615442, now seen corresponding path program 13 times [2023-11-17 16:21:28,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:28,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129966197] [2023-11-17 16:21:28,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:28,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:28,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:28,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:28,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129966197] [2023-11-17 16:21:28,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129966197] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:28,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619863619] [2023-11-17 16:21:28,527 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:21:28,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:28,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:28,529 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:21:28,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:21:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:28,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:21:28,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:28,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:28,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619863619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:28,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:28,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 16:21:28,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727378072] [2023-11-17 16:21:28,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:28,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:21:28,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:28,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:21:28,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:21:28,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 305 [2023-11-17 16:21:28,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 367 transitions, 4863 flow. Second operand has 20 states, 20 states have (on average 110.25) internal successors, (2205), 20 states have internal predecessors, (2205), 0 states have call successors, (0), 0 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 16:21:28,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:28,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 305 [2023-11-17 16:21:28,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:29,666 INFO L124 PetriNetUnfolderBase]: 1902/2768 cut-off events. [2023-11-17 16:21:29,666 INFO L125 PetriNetUnfolderBase]: For 43417/43417 co-relation queries the response was YES. [2023-11-17 16:21:29,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21765 conditions, 2768 events. 1902/2768 cut-off events. For 43417/43417 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11848 event pairs, 479 based on Foata normal form. 18/2772 useless extension candidates. Maximal degree in co-relation 21682. Up to 2036 conditions per place. [2023-11-17 16:21:29,689 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 343 selfloop transitions, 158 changer transitions 0/501 dead transitions. [2023-11-17 16:21:29,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 501 transitions, 7331 flow [2023-11-17 16:21:29,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:21:29,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:21:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1735 transitions. [2023-11-17 16:21:29,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37923497267759565 [2023-11-17 16:21:29,692 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1735 transitions. [2023-11-17 16:21:29,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1735 transitions. [2023-11-17 16:21:29,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:29,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1735 transitions. [2023-11-17 16:21:29,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 115.66666666666667) internal successors, (1735), 15 states have internal predecessors, (1735), 0 states have call successors, (0), 0 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 16:21:29,698 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 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 16:21:29,699 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 305.0) internal successors, (4880), 16 states have internal predecessors, (4880), 0 states have call successors, (0), 0 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 16:21:29,699 INFO L175 Difference]: Start difference. First operand has 180 places, 367 transitions, 4863 flow. Second operand 15 states and 1735 transitions. [2023-11-17 16:21:29,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 501 transitions, 7331 flow [2023-11-17 16:21:29,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 501 transitions, 6812 flow, removed 188 selfloop flow, removed 8 redundant places. [2023-11-17 16:21:29,901 INFO L231 Difference]: Finished difference. Result has 189 places, 403 transitions, 5387 flow [2023-11-17 16:21:29,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4398, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5387, PETRI_PLACES=189, PETRI_TRANSITIONS=403} [2023-11-17 16:21:29,902 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2023-11-17 16:21:29,902 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 403 transitions, 5387 flow [2023-11-17 16:21:29,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.25) internal successors, (2205), 20 states have internal predecessors, (2205), 0 states have call successors, (0), 0 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 16:21:29,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:29,903 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:29,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 16:21:30,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:21:30,104 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 1 more)] === [2023-11-17 16:21:30,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:30,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1071586694, now seen corresponding path program 14 times [2023-11-17 16:21:30,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:30,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698411746] [2023-11-17 16:21:30,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:30,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:30,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:30,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698411746] [2023-11-17 16:21:30,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698411746] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:30,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398216455] [2023-11-17 16:21:30,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:21:30,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:30,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:30,241 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:21:30,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:21:30,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:21:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:30,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:21:30,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:30,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:30,558 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:30,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398216455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:30,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:30,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-17 16:21:30,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436372796] [2023-11-17 16:21:30,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:30,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:21:30,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:30,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:21:30,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:21:30,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 305 [2023-11-17 16:21:30,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 403 transitions, 5387 flow. Second operand has 21 states, 21 states have (on average 109.9047619047619) internal successors, (2308), 21 states have internal predecessors, (2308), 0 states have call successors, (0), 0 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 16:21:30,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:30,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 305 [2023-11-17 16:21:30,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:31,363 INFO L124 PetriNetUnfolderBase]: 1879/2725 cut-off events. [2023-11-17 16:21:31,363 INFO L125 PetriNetUnfolderBase]: For 35308/35308 co-relation queries the response was YES. [2023-11-17 16:21:31,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20177 conditions, 2725 events. 1879/2725 cut-off events. For 35308/35308 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11558 event pairs, 479 based on Foata normal form. 16/2735 useless extension candidates. Maximal degree in co-relation 20092. Up to 2036 conditions per place. [2023-11-17 16:21:31,393 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 312 selfloop transitions, 153 changer transitions 0/465 dead transitions. [2023-11-17 16:21:31,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 465 transitions, 6820 flow [2023-11-17 16:21:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 16:21:31,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 16:21:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1382 transitions. [2023-11-17 16:21:31,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37759562841530053 [2023-11-17 16:21:31,402 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1382 transitions. [2023-11-17 16:21:31,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1382 transitions. [2023-11-17 16:21:31,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:31,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1382 transitions. [2023-11-17 16:21:31,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 115.16666666666667) internal successors, (1382), 12 states have internal predecessors, (1382), 0 states have call successors, (0), 0 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 16:21:31,409 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 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 16:21:31,410 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 305.0) internal successors, (3965), 13 states have internal predecessors, (3965), 0 states have call successors, (0), 0 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 16:21:31,410 INFO L175 Difference]: Start difference. First operand has 189 places, 403 transitions, 5387 flow. Second operand 12 states and 1382 transitions. [2023-11-17 16:21:31,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 465 transitions, 6820 flow [2023-11-17 16:21:31,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 465 transitions, 6474 flow, removed 137 selfloop flow, removed 10 redundant places. [2023-11-17 16:21:31,626 INFO L231 Difference]: Finished difference. Result has 189 places, 399 transitions, 5277 flow [2023-11-17 16:21:31,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5277, PETRI_PLACES=189, PETRI_TRANSITIONS=399} [2023-11-17 16:21:31,627 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 159 predicate places. [2023-11-17 16:21:31,628 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 399 transitions, 5277 flow [2023-11-17 16:21:31,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 109.9047619047619) internal successors, (2308), 21 states have internal predecessors, (2308), 0 states have call successors, (0), 0 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 16:21:31,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:31,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:31,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:21:31,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:31,834 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 1 more)] === [2023-11-17 16:21:31,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:31,834 INFO L85 PathProgramCache]: Analyzing trace with hash 319675212, now seen corresponding path program 15 times [2023-11-17 16:21:31,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:31,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371231243] [2023-11-17 16:21:31,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:31,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:31,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:31,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:31,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371231243] [2023-11-17 16:21:31,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371231243] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:31,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498435568] [2023-11-17 16:21:31,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:21:31,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:31,959 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:21:31,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:21:32,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:21:32,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:32,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-17 16:21:32,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:32,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:32,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:32,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:21:32,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498435568] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:32,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:32,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-17 16:21:32,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177696186] [2023-11-17 16:21:32,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:32,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:21:32,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:32,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:21:32,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:21:32,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 305 [2023-11-17 16:21:32,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 399 transitions, 5277 flow. Second operand has 21 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 16:21:32,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:32,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 305 [2023-11-17 16:21:32,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:33,067 INFO L124 PetriNetUnfolderBase]: 1902/2764 cut-off events. [2023-11-17 16:21:33,067 INFO L125 PetriNetUnfolderBase]: For 33488/33488 co-relation queries the response was YES. [2023-11-17 16:21:33,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20300 conditions, 2764 events. 1902/2764 cut-off events. For 33488/33488 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 11882 event pairs, 257 based on Foata normal form. 16/2774 useless extension candidates. Maximal degree in co-relation 20218. Up to 1311 conditions per place. [2023-11-17 16:21:33,089 INFO L140 encePairwiseOnDemand]: 296/305 looper letters, 362 selfloop transitions, 184 changer transitions 0/546 dead transitions. [2023-11-17 16:21:33,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 546 transitions, 7856 flow [2023-11-17 16:21:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:21:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:21:33,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1983 transitions. [2023-11-17 16:21:33,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3824493731918997 [2023-11-17 16:21:33,092 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1983 transitions. [2023-11-17 16:21:33,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1983 transitions. [2023-11-17 16:21:33,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:33,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1983 transitions. [2023-11-17 16:21:33,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 116.6470588235294) internal successors, (1983), 17 states have internal predecessors, (1983), 0 states have call successors, (0), 0 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 16:21:33,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 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 16:21:33,099 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 305.0) internal successors, (5490), 18 states have internal predecessors, (5490), 0 states have call successors, (0), 0 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 16:21:33,099 INFO L175 Difference]: Start difference. First operand has 189 places, 399 transitions, 5277 flow. Second operand 17 states and 1983 transitions. [2023-11-17 16:21:33,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 546 transitions, 7856 flow [2023-11-17 16:21:33,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 546 transitions, 7536 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-17 16:21:33,248 INFO L231 Difference]: Finished difference. Result has 195 places, 406 transitions, 5461 flow [2023-11-17 16:21:33,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4971, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5461, PETRI_PLACES=195, PETRI_TRANSITIONS=406} [2023-11-17 16:21:33,249 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 165 predicate places. [2023-11-17 16:21:33,249 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 406 transitions, 5461 flow [2023-11-17 16:21:33,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 110.0) internal successors, (2310), 21 states have internal predecessors, (2310), 0 states have call successors, (0), 0 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 16:21:33,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:33,250 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:33,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:21:33,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:33,455 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 1 more)] === [2023-11-17 16:21:33,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:33,455 INFO L85 PathProgramCache]: Analyzing trace with hash -327707020, now seen corresponding path program 16 times [2023-11-17 16:21:33,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:33,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718536082] [2023-11-17 16:21:33,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:33,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:33,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:33,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:33,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718536082] [2023-11-17 16:21:33,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718536082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:33,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625562991] [2023-11-17 16:21:33,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:21:33,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:33,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:33,565 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:21:33,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:21:33,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:21:33,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:33,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 16:21:33,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:33,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:21:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625562991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:21:33,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:21:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 17 [2023-11-17 16:21:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207704091] [2023-11-17 16:21:33,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:21:33,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 16:21:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:21:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 16:21:33,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2023-11-17 16:21:33,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 305 [2023-11-17 16:21:33,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 406 transitions, 5461 flow. Second operand has 17 states, 17 states have (on average 106.52941176470588) internal successors, (1811), 17 states have internal predecessors, (1811), 0 states have call successors, (0), 0 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 16:21:33,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:21:33,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 305 [2023-11-17 16:21:33,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:21:34,616 INFO L124 PetriNetUnfolderBase]: 1913/2783 cut-off events. [2023-11-17 16:21:34,616 INFO L125 PetriNetUnfolderBase]: For 34064/34064 co-relation queries the response was YES. [2023-11-17 16:21:34,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20661 conditions, 2783 events. 1913/2783 cut-off events. For 34064/34064 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 11994 event pairs, 139 based on Foata normal form. 16/2793 useless extension candidates. Maximal degree in co-relation 20578. Up to 1333 conditions per place. [2023-11-17 16:21:34,643 INFO L140 encePairwiseOnDemand]: 293/305 looper letters, 257 selfloop transitions, 278 changer transitions 0/535 dead transitions. [2023-11-17 16:21:34,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 535 transitions, 7932 flow [2023-11-17 16:21:34,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:21:34,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:21:34,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2215 transitions. [2023-11-17 16:21:34,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36311475409836064 [2023-11-17 16:21:34,645 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2215 transitions. [2023-11-17 16:21:34,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2215 transitions. [2023-11-17 16:21:34,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:21:34,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2215 transitions. [2023-11-17 16:21:34,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 110.75) internal successors, (2215), 20 states have internal predecessors, (2215), 0 states have call successors, (0), 0 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 16:21:34,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:34,653 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 305.0) internal successors, (6405), 21 states have internal predecessors, (6405), 0 states have call successors, (0), 0 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 16:21:34,653 INFO L175 Difference]: Start difference. First operand has 195 places, 406 transitions, 5461 flow. Second operand 20 states and 2215 transitions. [2023-11-17 16:21:34,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 535 transitions, 7932 flow [2023-11-17 16:21:34,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 535 transitions, 7493 flow, removed 0 selfloop flow, removed 16 redundant places. [2023-11-17 16:21:34,792 INFO L231 Difference]: Finished difference. Result has 197 places, 435 transitions, 6058 flow [2023-11-17 16:21:34,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=305, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6058, PETRI_PLACES=197, PETRI_TRANSITIONS=435} [2023-11-17 16:21:34,793 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2023-11-17 16:21:34,793 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 435 transitions, 6058 flow [2023-11-17 16:21:34,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 106.52941176470588) internal successors, (1811), 17 states have internal predecessors, (1811), 0 states have call successors, (0), 0 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 16:21:34,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:21:34,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:21:34,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 16:21:34,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:34,997 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 1 more)] === [2023-11-17 16:21:34,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:21:34,997 INFO L85 PathProgramCache]: Analyzing trace with hash -529562191, now seen corresponding path program 2 times [2023-11-17 16:21:34,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:21:34,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23564412] [2023-11-17 16:21:34,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:21:34,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:21:35,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:21:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:21:36,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:21:36,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23564412] [2023-11-17 16:21:36,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23564412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:21:36,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570760946] [2023-11-17 16:21:36,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:21:36,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:21:36,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:21:36,066 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:21:36,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:21:36,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:21:36,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:21:36,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 16:21:36,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:21:36,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 16:21:36,821 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 90 [2023-11-17 16:21:37,358 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:37,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 93 [2023-11-17 16:21:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:21:37,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:21:38,027 WARN L854 $PredicateComparison]: unable to prove that (and (or (= c_~max1~0 c_~max2~0) (forall ((v_thread3Thread1of1ForFork0_~i~2_123 Int) (v_ArrVal_693 (Array Int Int))) (or (< (+ v_thread3Thread1of1ForFork0_~i~2_123 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork0_~i~2_123) (< c_~max2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_693) c_~A~0.base) (+ c_~A~0.offset (* v_thread3Thread1of1ForFork0_~i~2_123 4))))))) (forall ((v_thread3Thread1of1ForFork0_~i~2_123 Int) (v_ArrVal_693 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_693) c_~A~0.base) (+ c_~A~0.offset (* v_thread3Thread1of1ForFork0_~i~2_123 4))))) (or (< (+ v_thread3Thread1of1ForFork0_~i~2_123 1) c_~N~0) (< c_~M~0 v_thread3Thread1of1ForFork0_~i~2_123) (= .cse0 c_~max1~0) (< .cse0 (+ c_~max2~0 1)))))) is different from false [2023-11-17 16:21:39,526 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 16:21:39,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 671 treesize of output 863 [2023-11-17 16:21:39,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 389 treesize of output 383 [2023-11-17 16:21:39,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 371 [2023-11-17 16:21:39,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 371 treesize of output 365 [2023-11-17 16:21:39,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 365 treesize of output 353 [2023-11-17 16:21:39,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 341 [2023-11-17 16:21:39,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 335 [2023-11-17 16:21:40,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 335 treesize of output 329 [2023-11-17 16:21:40,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 317 [2023-11-17 16:21:40,162 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-11-17 16:22:20,464 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:22:27,634 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:23:31,889 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-11-17 16:23:59,451 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-11-17 16:23:59,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-11-17 16:23:59,453 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-11-17 16:23:59,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 16:23:59,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:23:59,654 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:268) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:410) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:394) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:500) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:252) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:731) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:338) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 68 more [2023-11-17 16:23:59,657 INFO L158 Benchmark]: Toolchain (without parser) took 184420.30ms. Allocated memory was 182.5MB in the beginning and 811.6MB in the end (delta: 629.1MB). Free memory was 133.0MB in the beginning and 570.2MB in the end (delta: -437.2MB). Peak memory consumption was 484.9MB. Max. memory is 8.0GB. [2023-11-17 16:23:59,657 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 129.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:23:59,658 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.69ms. Allocated memory is still 182.5MB. Free memory was 133.0MB in the beginning and 121.1MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:23:59,658 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.60ms. Allocated memory is still 182.5MB. Free memory was 121.1MB in the beginning and 119.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:23:59,658 INFO L158 Benchmark]: Boogie Preprocessor took 30.18ms. Allocated memory is still 182.5MB. Free memory was 119.3MB in the beginning and 117.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:23:59,658 INFO L158 Benchmark]: RCFGBuilder took 495.71ms. Allocated memory is still 182.5MB. Free memory was 117.6MB in the beginning and 95.3MB in the end (delta: 22.4MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. [2023-11-17 16:23:59,658 INFO L158 Benchmark]: TraceAbstraction took 183616.74ms. Allocated memory was 182.5MB in the beginning and 811.6MB in the end (delta: 629.1MB). Free memory was 94.6MB in the beginning and 570.2MB in the end (delta: -475.6MB). Peak memory consumption was 446.1MB. Max. memory is 8.0GB. [2023-11-17 16:23:59,659 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 182.5MB. Free memory is still 129.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 230.69ms. Allocated memory is still 182.5MB. Free memory was 133.0MB in the beginning and 121.1MB in the end (delta: 11.8MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 39.60ms. Allocated memory is still 182.5MB. Free memory was 121.1MB in the beginning and 119.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 30.18ms. Allocated memory is still 182.5MB. Free memory was 119.3MB in the beginning and 117.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 495.71ms. Allocated memory is still 182.5MB. Free memory was 117.6MB in the beginning and 95.3MB in the end (delta: 22.4MB). Peak memory consumption was 22.0MB. Max. memory is 8.0GB. * TraceAbstraction took 183616.74ms. Allocated memory was 182.5MB in the beginning and 811.6MB in the end (delta: 629.1MB). Free memory was 94.6MB in the beginning and 570.2MB in the end (delta: -475.6MB). Peak memory consumption was 446.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.5s, 143 PlacesBefore, 30 PlacesAfterwards, 145 TransitionsBefore, 24 TransitionsAfterwards, 1728 CoEnabledTransitionPairs, 8 FixpointIterations, 83 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 16 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 146 TotalNumberOfCompositions, 1847 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1707, independent: 1685, independent conditional: 0, independent unconditional: 1685, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1133, independent: 1121, independent conditional: 0, independent unconditional: 1121, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1133, independent: 1121, independent conditional: 0, independent unconditional: 1121, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 12, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 57, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 57, dependent conditional: 0, dependent unconditional: 57, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 1707, independent: 564, independent conditional: 0, independent unconditional: 564, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 1133, unknown conditional: 0, unknown unconditional: 1133] , Statistics on independence cache: Total cache size (in pairs): 65, Positive cache size: 63, Positive conditional cache size: 0, Positive unconditional cache size: 63, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...