/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf --rcfgbuilder.only.consider.context.switches.at.boundaries.of.atomic.blocks true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:54:31,200 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:54:31,285 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 11:54:31,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:54:31,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:54:31,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:54:31,324 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:54:31,324 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:54:31,325 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:54:31,329 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:54:31,329 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:54:31,330 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:54:31,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:54:31,331 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:54:31,331 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:54:31,332 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:54:31,332 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:54:31,332 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:54:31,332 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:54:31,332 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:54:31,333 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:54:31,333 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:54:31,334 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:54:31,334 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:54:31,334 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:54:31,334 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:54:31,335 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:54:31,335 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:54:31,335 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:54:31,335 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:54:31,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:54:31,336 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:54:31,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:54:31,597 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:54:31,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:54:31,626 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:54:31,627 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:54:31,627 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:54:31,628 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-11-17 11:54:32,817 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:54:33,011 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:54:33,011 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-name-comparator-trans.wvr.c [2023-11-17 11:54:33,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3664fd79b/b567356a17bd427a8ab89c9333ddcc4c/FLAG44f613597 [2023-11-17 11:54:33,037 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3664fd79b/b567356a17bd427a8ab89c9333ddcc4c [2023-11-17 11:54:33,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:54:33,041 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:54:33,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:54:33,042 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:54:33,047 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:54:33,048 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,049 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@287752af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33, skipping insertion in model container [2023-11-17 11:54:33,049 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,076 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:54:33,236 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/chl-name-comparator-trans.wvr.c[4827,4840] [2023-11-17 11:54:33,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:54:33,254 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:54:33,282 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/chl-name-comparator-trans.wvr.c[4827,4840] [2023-11-17 11:54:33,286 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:54:33,299 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:54:33,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33 WrapperNode [2023-11-17 11:54:33,301 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:54:33,304 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:54:33,304 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:54:33,304 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:54:33,309 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,317 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,349 INFO L138 Inliner]: procedures = 26, calls = 44, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 319 [2023-11-17 11:54:33,349 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:54:33,350 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:54:33,350 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:54:33,350 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:54:33,359 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,360 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,365 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,365 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,378 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,382 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,385 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,387 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,391 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:54:33,392 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:54:33,392 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:54:33,392 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:54:33,393 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (1/1) ... [2023-11-17 11:54:33,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:54:33,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:33,425 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 11:54:33,437 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 11:54:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:54:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:54:33,453 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:54:33,454 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:54:33,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 11:54:33,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 11:54:33,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 11:54:33,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 11:54:33,454 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 11:54:33,454 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 11:54:33,454 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:54:33,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:54:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:54:33,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:54:33,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:54:33,457 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 11:54:33,556 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:54:33,558 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:54:33,986 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:54:34,429 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:54:34,429 INFO L307 CfgBuilder]: Removed 4 assume(true) statements. [2023-11-17 11:54:34,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:54:34 BoogieIcfgContainer [2023-11-17 11:54:34,432 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:54:34,435 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:54:34,435 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:54:34,437 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:54:34,438 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:54:33" (1/3) ... [2023-11-17 11:54:34,438 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6839af6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:54:34, skipping insertion in model container [2023-11-17 11:54:34,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:54:33" (2/3) ... [2023-11-17 11:54:34,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6839af6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:54:34, skipping insertion in model container [2023-11-17 11:54:34,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:54:34" (3/3) ... [2023-11-17 11:54:34,440 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-name-comparator-trans.wvr.c [2023-11-17 11:54:34,457 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:54:34,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:54:34,458 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:54:34,520 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:54:34,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 38 transitions, 97 flow [2023-11-17 11:54:34,598 INFO L124 PetriNetUnfolderBase]: 7/35 cut-off events. [2023-11-17 11:54:34,598 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:54:34,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 35 events. 7/35 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 11:54:34,603 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 38 transitions, 97 flow [2023-11-17 11:54:34,606 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 34 transitions, 86 flow [2023-11-17 11:54:34,608 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:54:34,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 37 places, 34 transitions, 86 flow [2023-11-17 11:54:34,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 37 places, 34 transitions, 86 flow [2023-11-17 11:54:34,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 34 transitions, 86 flow [2023-11-17 11:54:34,634 INFO L124 PetriNetUnfolderBase]: 7/34 cut-off events. [2023-11-17 11:54:34,634 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:54:34,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 34 events. 7/34 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 29 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2023-11-17 11:54:34,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 396 [2023-11-17 11:54:36,360 INFO L134 LiptonReduction]: Checked pairs total: 399 [2023-11-17 11:54:36,360 INFO L136 LiptonReduction]: Total number of compositions: 16 [2023-11-17 11:54:36,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:54:36,380 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;@5580a74e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:54:36,380 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:54:36,396 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:54:36,396 INFO L124 PetriNetUnfolderBase]: 4/23 cut-off events. [2023-11-17 11:54:36,396 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:54:36,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:36,397 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 11:54:36,398 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 11:54:36,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:36,403 INFO L85 PathProgramCache]: Analyzing trace with hash 727726847, now seen corresponding path program 1 times [2023-11-17 11:54:36,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:36,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249435999] [2023-11-17 11:54:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:36,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:36,878 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 11:54:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249435999] [2023-11-17 11:54:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249435999] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:54:36,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:54:36,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 11:54:36,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801886367] [2023-11-17 11:54:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:54:36,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:54:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:36,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:54:36,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:54:36,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:54:36,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:36,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:36,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:54:36,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:37,091 INFO L124 PetriNetUnfolderBase]: 221/328 cut-off events. [2023-11-17 11:54:37,092 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-17 11:54:37,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 700 conditions, 328 events. 221/328 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 773 event pairs, 138 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 534. Up to 328 conditions per place. [2023-11-17 11:54:37,099 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 23 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-17 11:54:37,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 25 transitions, 118 flow [2023-11-17 11:54:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:54:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:54:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 47 transitions. [2023-11-17 11:54:37,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29012345679012347 [2023-11-17 11:54:37,113 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 47 transitions. [2023-11-17 11:54:37,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 47 transitions. [2023-11-17 11:54:37,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:37,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 47 transitions. [2023-11-17 11:54:37,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 54.0) internal successors, (216), 4 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,127 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 47 transitions. [2023-11-17 11:54:37,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 25 transitions, 118 flow [2023-11-17 11:54:37,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 11:54:37,134 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2023-11-17 11:54:37,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, 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=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-11-17 11:54:37,139 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-11-17 11:54:37,140 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2023-11-17 11:54:37,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:37,140 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 11:54:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:54:37,141 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 11:54:37,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:37,143 INFO L85 PathProgramCache]: Analyzing trace with hash 405002933, now seen corresponding path program 1 times [2023-11-17 11:54:37,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:37,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015112943] [2023-11-17 11:54:37,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:37,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:54:37,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:37,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015112943] [2023-11-17 11:54:37,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015112943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:37,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074161287] [2023-11-17 11:54:37,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:37,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:37,320 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 11:54:37,340 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 11:54:37,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:37,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:54:37,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:37,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:54:37,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 11:54:37,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074161287] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:37,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:37,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-17 11:54:37,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107561953] [2023-11-17 11:54:37,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:37,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:54:37,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:37,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:54:37,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:54:37,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:54:37,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:37,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:54:37,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:37,729 INFO L124 PetriNetUnfolderBase]: 221/330 cut-off events. [2023-11-17 11:54:37,729 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:54:37,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 330 events. 221/330 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 777 event pairs, 138 based on Foata normal form. 0/247 useless extension candidates. Maximal degree in co-relation 673. Up to 328 conditions per place. [2023-11-17 11:54:37,733 INFO L140 encePairwiseOnDemand]: 51/54 looper letters, 23 selfloop transitions, 4 changer transitions 0/27 dead transitions. [2023-11-17 11:54:37,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 128 flow [2023-11-17 11:54:37,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:54:37,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:54:37,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 64 transitions. [2023-11-17 11:54:37,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23703703703703705 [2023-11-17 11:54:37,737 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 64 transitions. [2023-11-17 11:54:37,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 64 transitions. [2023-11-17 11:54:37,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:37,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 64 transitions. [2023-11-17 11:54:37,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,741 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 54.0) internal successors, (324), 6 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,742 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 5 states and 64 transitions. [2023-11-17 11:54:37,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 128 flow [2023-11-17 11:54:37,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 124 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 11:54:37,751 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 88 flow [2023-11-17 11:54:37,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=88, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-17 11:54:37,752 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2023-11-17 11:54:37,752 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 88 flow [2023-11-17 11:54:37,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:37,752 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:37,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-17 11:54:37,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:37,958 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 11:54:37,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:37,959 INFO L85 PathProgramCache]: Analyzing trace with hash 133194357, now seen corresponding path program 2 times [2023-11-17 11:54:37,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:37,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516861584] [2023-11-17 11:54:37,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:38,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:38,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:38,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516861584] [2023-11-17 11:54:38,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516861584] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:54:38,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:54:38,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:54:38,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347889561] [2023-11-17 11:54:38,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:54:38,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:54:38,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:38,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:54:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:54:38,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:54:38,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:38,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:54:38,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:38,519 INFO L124 PetriNetUnfolderBase]: 381/567 cut-off events. [2023-11-17 11:54:38,519 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-11-17 11:54:38,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 567 events. 381/567 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1724 event pairs, 138 based on Foata normal form. 1/418 useless extension candidates. Maximal degree in co-relation 1148. Up to 331 conditions per place. [2023-11-17 11:54:38,523 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 37 selfloop transitions, 2 changer transitions 17/56 dead transitions. [2023-11-17 11:54:38,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 56 transitions, 265 flow [2023-11-17 11:54:38,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:54:38,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:54:38,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 82 transitions. [2023-11-17 11:54:38,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37962962962962965 [2023-11-17 11:54:38,524 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 82 transitions. [2023-11-17 11:54:38,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 82 transitions. [2023-11-17 11:54:38,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:38,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 82 transitions. [2023-11-17 11:54:38,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.5) internal successors, (82), 4 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,526 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,527 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 88 flow. Second operand 4 states and 82 transitions. [2023-11-17 11:54:38,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 56 transitions, 265 flow [2023-11-17 11:54:38,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 56 transitions, 255 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-11-17 11:54:38,529 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 92 flow [2023-11-17 11:54:38,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, 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=4, PETRI_FLOW=92, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-11-17 11:54:38,530 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 6 predicate places. [2023-11-17 11:54:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 92 flow [2023-11-17 11:54:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:38,530 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:38,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 11:54:38,530 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 11:54:38,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:38,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1361144688, now seen corresponding path program 1 times [2023-11-17 11:54:38,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:38,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865892050] [2023-11-17 11:54:38,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:38,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:38,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:38,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:38,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865892050] [2023-11-17 11:54:38,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865892050] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:54:38,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:54:38,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:54:38,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137881071] [2023-11-17 11:54:38,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:54:38,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:54:38,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:54:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:54:38,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:54:38,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:38,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:54:38,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:38,969 INFO L124 PetriNetUnfolderBase]: 462/680 cut-off events. [2023-11-17 11:54:38,969 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-17 11:54:38,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 680 events. 462/680 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2173 event pairs, 183 based on Foata normal form. 1/509 useless extension candidates. Maximal degree in co-relation 1602. Up to 416 conditions per place. [2023-11-17 11:54:38,973 INFO L140 encePairwiseOnDemand]: 50/54 looper letters, 39 selfloop transitions, 2 changer transitions 16/57 dead transitions. [2023-11-17 11:54:38,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 57 transitions, 290 flow [2023-11-17 11:54:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:54:38,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:54:38,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2023-11-17 11:54:38,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2023-11-17 11:54:38,974 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 80 transitions. [2023-11-17 11:54:38,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 80 transitions. [2023-11-17 11:54:38,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:38,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 80 transitions. [2023-11-17 11:54:38,975 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,976 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 54.0) internal successors, (270), 5 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,976 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 92 flow. Second operand 4 states and 80 transitions. [2023-11-17 11:54:38,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 57 transitions, 290 flow [2023-11-17 11:54:38,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 276 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 11:54:38,980 INFO L231 Difference]: Finished difference. Result has 38 places, 29 transitions, 100 flow [2023-11-17 11:54:38,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=38, PETRI_TRANSITIONS=29} [2023-11-17 11:54:38,981 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-11-17 11:54:38,982 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 29 transitions, 100 flow [2023-11-17 11:54:38,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:38,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:38,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:54:38,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 11:54:38,982 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 11:54:38,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash 54759810, now seen corresponding path program 1 times [2023-11-17 11:54:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:38,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613355477] [2023-11-17 11:54:38,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:38,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613355477] [2023-11-17 11:54:39,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613355477] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757498768] [2023-11-17 11:54:39,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:39,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:39,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:39,878 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 11:54:39,898 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 11:54:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:40,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:54:40,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:40,413 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 172 treesize of output 112 [2023-11-17 11:54:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:41,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:41,994 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:41,997 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 195 treesize of output 103 [2023-11-17 11:54:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:42,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757498768] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:42,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:42,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2023-11-17 11:54:42,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378720282] [2023-11-17 11:54:42,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:42,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:54:42,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:42,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:54:42,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:54:42,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:54:42,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 29 transitions, 100 flow. Second operand has 26 states, 26 states have (on average 9.461538461538462) internal successors, (246), 26 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:42,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:42,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:54:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:50,545 INFO L124 PetriNetUnfolderBase]: 2408/3681 cut-off events. [2023-11-17 11:54:50,546 INFO L125 PetriNetUnfolderBase]: For 912/912 co-relation queries the response was YES. [2023-11-17 11:54:50,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9224 conditions, 3681 events. 2408/3681 cut-off events. For 912/912 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 18571 event pairs, 132 based on Foata normal form. 13/2700 useless extension candidates. Maximal degree in co-relation 9198. Up to 901 conditions per place. [2023-11-17 11:54:50,571 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 387 selfloop transitions, 162 changer transitions 118/667 dead transitions. [2023-11-17 11:54:50,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 667 transitions, 3172 flow [2023-11-17 11:54:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-17 11:54:50,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-11-17 11:54:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 1159 transitions. [2023-11-17 11:54:50,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3066137566137566 [2023-11-17 11:54:50,578 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 1159 transitions. [2023-11-17 11:54:50,578 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 1159 transitions. [2023-11-17 11:54:50,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:50,579 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 1159 transitions. [2023-11-17 11:54:50,582 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 16.557142857142857) internal successors, (1159), 70 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:50,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 54.0) internal successors, (3834), 71 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:50,590 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 54.0) internal successors, (3834), 71 states have internal predecessors, (3834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:50,590 INFO L175 Difference]: Start difference. First operand has 38 places, 29 transitions, 100 flow. Second operand 70 states and 1159 transitions. [2023-11-17 11:54:50,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 667 transitions, 3172 flow [2023-11-17 11:54:50,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 667 transitions, 3092 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-11-17 11:54:50,601 INFO L231 Difference]: Finished difference. Result has 142 places, 204 transitions, 1265 flow [2023-11-17 11:54:50,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=1265, PETRI_PLACES=142, PETRI_TRANSITIONS=204} [2023-11-17 11:54:50,602 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 112 predicate places. [2023-11-17 11:54:50,603 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 204 transitions, 1265 flow [2023-11-17 11:54:50,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.461538461538462) internal successors, (246), 26 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:50,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:50,603 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:54:50,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:50,809 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 11:54:50,809 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 11:54:50,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:50,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2075689892, now seen corresponding path program 2 times [2023-11-17 11:54:50,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:50,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539495597] [2023-11-17 11:54:50,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:50,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:50,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:51,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:51,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539495597] [2023-11-17 11:54:51,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539495597] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:51,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642196781] [2023-11-17 11:54:51,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:54:51,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:51,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:51,654 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 11:54:51,657 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 11:54:51,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:51,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:51,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 11:54:51,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:51,994 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 87 treesize of output 70 [2023-11-17 11:54:52,367 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 87 treesize of output 55 [2023-11-17 11:54:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:52,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:53,096 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:53,096 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 149 treesize of output 89 [2023-11-17 11:54:53,104 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 9 treesize of output 7 [2023-11-17 11:54:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:53,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642196781] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:53,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:53,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-11-17 11:54:53,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22815803] [2023-11-17 11:54:53,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:53,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-17 11:54:53,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:53,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-17 11:54:53,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=934, Unknown=1, NotChecked=0, Total=1056 [2023-11-17 11:54:53,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:54:53,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 204 transitions, 1265 flow. Second operand has 33 states, 33 states have (on average 9.090909090909092) internal successors, (300), 33 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:53,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:53,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:54:53,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:57,526 INFO L124 PetriNetUnfolderBase]: 3685/5783 cut-off events. [2023-11-17 11:54:57,527 INFO L125 PetriNetUnfolderBase]: For 140265/140265 co-relation queries the response was YES. [2023-11-17 11:54:57,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38342 conditions, 5783 events. 3685/5783 cut-off events. For 140265/140265 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33074 event pairs, 511 based on Foata normal form. 9/5542 useless extension candidates. Maximal degree in co-relation 38278. Up to 1915 conditions per place. [2023-11-17 11:54:57,598 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 294 selfloop transitions, 144 changer transitions 106/544 dead transitions. [2023-11-17 11:54:57,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 544 transitions, 4639 flow [2023-11-17 11:54:57,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 11:54:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 11:54:57,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 430 transitions. [2023-11-17 11:54:57,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2843915343915344 [2023-11-17 11:54:57,601 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 430 transitions. [2023-11-17 11:54:57,601 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 430 transitions. [2023-11-17 11:54:57,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:57,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 430 transitions. [2023-11-17 11:54:57,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 15.357142857142858) internal successors, (430), 28 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 54.0) internal successors, (1566), 29 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,605 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 54.0) internal successors, (1566), 29 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,605 INFO L175 Difference]: Start difference. First operand has 142 places, 204 transitions, 1265 flow. Second operand 28 states and 430 transitions. [2023-11-17 11:54:57,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 544 transitions, 4639 flow [2023-11-17 11:54:57,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 544 transitions, 3880 flow, removed 342 selfloop flow, removed 15 redundant places. [2023-11-17 11:54:57,896 INFO L231 Difference]: Finished difference. Result has 160 places, 268 transitions, 2061 flow [2023-11-17 11:54:57,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2061, PETRI_PLACES=160, PETRI_TRANSITIONS=268} [2023-11-17 11:54:57,897 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-11-17 11:54:57,897 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 268 transitions, 2061 flow [2023-11-17 11:54:57,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.090909090909092) internal successors, (300), 33 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:57,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:57,897 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:54:57,904 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 11:54:58,098 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 11:54:58,099 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 11:54:58,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:58,099 INFO L85 PathProgramCache]: Analyzing trace with hash 643078732, now seen corresponding path program 3 times [2023-11-17 11:54:58,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:58,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147899736] [2023-11-17 11:54:58,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:58,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:58,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:59,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:59,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147899736] [2023-11-17 11:54:59,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147899736] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:59,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119386255] [2023-11-17 11:54:59,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:54:59,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:59,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:59,057 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 11:54:59,080 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 11:54:59,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:54:59,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:59,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:54:59,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:59,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:59,442 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 21 treesize of output 16 [2023-11-17 11:54:59,485 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 112 treesize of output 72 [2023-11-17 11:54:59,649 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:54:59,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:00,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:00,279 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 88 treesize of output 60 [2023-11-17 11:55:00,286 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 20 treesize of output 18 [2023-11-17 11:55:00,433 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:00,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119386255] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:00,433 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:00,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-11-17 11:55:00,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936890358] [2023-11-17 11:55:00,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:00,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:55:00,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:00,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:55:00,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=705, Unknown=6, NotChecked=0, Total=812 [2023-11-17 11:55:00,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:55:00,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 268 transitions, 2061 flow. Second operand has 29 states, 29 states have (on average 9.379310344827585) internal successors, (272), 29 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:00,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:00,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:55:00,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:02,788 INFO L124 PetriNetUnfolderBase]: 4106/6375 cut-off events. [2023-11-17 11:55:02,788 INFO L125 PetriNetUnfolderBase]: For 193345/193345 co-relation queries the response was YES. [2023-11-17 11:55:02,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50821 conditions, 6375 events. 4106/6375 cut-off events. For 193345/193345 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36212 event pairs, 672 based on Foata normal form. 4/5849 useless extension candidates. Maximal degree in co-relation 50752. Up to 1868 conditions per place. [2023-11-17 11:55:02,866 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 286 selfloop transitions, 121 changer transitions 20/427 dead transitions. [2023-11-17 11:55:02,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 427 transitions, 5367 flow [2023-11-17 11:55:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 11:55:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 11:55:02,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 280 transitions. [2023-11-17 11:55:02,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30501089324618735 [2023-11-17 11:55:02,872 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 280 transitions. [2023-11-17 11:55:02,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 280 transitions. [2023-11-17 11:55:02,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:02,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 280 transitions. [2023-11-17 11:55:02,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 16.470588235294116) internal successors, (280), 17 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 54.0) internal successors, (972), 18 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,883 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 54.0) internal successors, (972), 18 states have internal predecessors, (972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:02,884 INFO L175 Difference]: Start difference. First operand has 160 places, 268 transitions, 2061 flow. Second operand 17 states and 280 transitions. [2023-11-17 11:55:02,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 427 transitions, 5367 flow [2023-11-17 11:55:03,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 427 transitions, 4434 flow, removed 448 selfloop flow, removed 10 redundant places. [2023-11-17 11:55:03,621 INFO L231 Difference]: Finished difference. Result has 160 places, 292 transitions, 2276 flow [2023-11-17 11:55:03,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2276, PETRI_PLACES=160, PETRI_TRANSITIONS=292} [2023-11-17 11:55:03,622 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2023-11-17 11:55:03,622 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 292 transitions, 2276 flow [2023-11-17 11:55:03,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.379310344827585) internal successors, (272), 29 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:03,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:03,622 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:55:03,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:03,828 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 11:55:03,829 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 11:55:03,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:03,829 INFO L85 PathProgramCache]: Analyzing trace with hash 426313624, now seen corresponding path program 4 times [2023-11-17 11:55:03,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:03,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839922169] [2023-11-17 11:55:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:05,268 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 11:55:05,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:05,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839922169] [2023-11-17 11:55:05,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839922169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:05,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358389501] [2023-11-17 11:55:05,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:55:05,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:05,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:05,271 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 11:55:05,292 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 11:55:05,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:55:05,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:05,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:55:05,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:05,848 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 155 treesize of output 99 [2023-11-17 11:55:05,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:05,938 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:06,527 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 11:55:06,527 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 105 treesize of output 56 [2023-11-17 11:55:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358389501] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:06,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 9] total 33 [2023-11-17 11:55:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719392961] [2023-11-17 11:55:06,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-17 11:55:06,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:06,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-17 11:55:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1000, Unknown=0, NotChecked=0, Total=1122 [2023-11-17 11:55:06,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:55:06,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 292 transitions, 2276 flow. Second operand has 34 states, 34 states have (on average 9.088235294117647) internal successors, (309), 34 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:06,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:06,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:55:06,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:11,518 INFO L124 PetriNetUnfolderBase]: 5160/8080 cut-off events. [2023-11-17 11:55:11,519 INFO L125 PetriNetUnfolderBase]: For 128820/128820 co-relation queries the response was YES. [2023-11-17 11:55:11,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56810 conditions, 8080 events. 5160/8080 cut-off events. For 128820/128820 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 49133 event pairs, 561 based on Foata normal form. 3/7291 useless extension candidates. Maximal degree in co-relation 56743. Up to 2343 conditions per place. [2023-11-17 11:55:11,598 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 367 selfloop transitions, 327 changer transitions 21/715 dead transitions. [2023-11-17 11:55:11,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 715 transitions, 7319 flow [2023-11-17 11:55:11,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-17 11:55:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-17 11:55:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 485 transitions. [2023-11-17 11:55:11,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2721661054994388 [2023-11-17 11:55:11,600 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 485 transitions. [2023-11-17 11:55:11,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 485 transitions. [2023-11-17 11:55:11,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:11,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 485 transitions. [2023-11-17 11:55:11,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 14.696969696969697) internal successors, (485), 33 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:11,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 54.0) internal successors, (1836), 34 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:11,605 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 54.0) internal successors, (1836), 34 states have internal predecessors, (1836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:11,605 INFO L175 Difference]: Start difference. First operand has 160 places, 292 transitions, 2276 flow. Second operand 33 states and 485 transitions. [2023-11-17 11:55:11,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 715 transitions, 7319 flow [2023-11-17 11:55:11,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 715 transitions, 6889 flow, removed 187 selfloop flow, removed 7 redundant places. [2023-11-17 11:55:11,992 INFO L231 Difference]: Finished difference. Result has 202 places, 464 transitions, 5042 flow [2023-11-17 11:55:11,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5042, PETRI_PLACES=202, PETRI_TRANSITIONS=464} [2023-11-17 11:55:11,993 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 172 predicate places. [2023-11-17 11:55:11,993 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 464 transitions, 5042 flow [2023-11-17 11:55:11,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 9.088235294117647) internal successors, (309), 34 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:11,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:11,994 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:55:11,999 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 11:55:12,195 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 11:55:12,196 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 11:55:12,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:12,196 INFO L85 PathProgramCache]: Analyzing trace with hash 715841452, now seen corresponding path program 5 times [2023-11-17 11:55:12,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:12,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482246387] [2023-11-17 11:55:12,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:12,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:12,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:12,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482246387] [2023-11-17 11:55:12,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482246387] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:12,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965154993] [2023-11-17 11:55:12,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:55:12,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:12,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:12,864 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 11:55:12,887 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 11:55:13,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 11:55:13,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:13,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-17 11:55:13,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:13,346 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 64 treesize of output 40 [2023-11-17 11:55:13,421 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:13,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:14,049 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:14,050 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 166 treesize of output 94 [2023-11-17 11:55:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965154993] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:14,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:14,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2023-11-17 11:55:14,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691041886] [2023-11-17 11:55:14,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:14,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 11:55:14,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:14,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 11:55:14,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2023-11-17 11:55:14,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:55:14,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 464 transitions, 5042 flow. Second operand has 25 states, 25 states have (on average 9.4) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:14,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:14,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:55:14,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:21,714 INFO L124 PetriNetUnfolderBase]: 9819/15974 cut-off events. [2023-11-17 11:55:21,715 INFO L125 PetriNetUnfolderBase]: For 291730/291730 co-relation queries the response was YES. [2023-11-17 11:55:21,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128807 conditions, 15974 events. 9819/15974 cut-off events. For 291730/291730 co-relation queries the response was YES. Maximal size of possible extension queue 844. Compared 114871 event pairs, 1175 based on Foata normal form. 12/14224 useless extension candidates. Maximal degree in co-relation 128724. Up to 5097 conditions per place. [2023-11-17 11:55:21,868 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 849 selfloop transitions, 587 changer transitions 68/1504 dead transitions. [2023-11-17 11:55:21,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 1504 transitions, 19288 flow [2023-11-17 11:55:21,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-17 11:55:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-11-17 11:55:21,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 841 transitions. [2023-11-17 11:55:21,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26851851851851855 [2023-11-17 11:55:21,871 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 841 transitions. [2023-11-17 11:55:21,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 841 transitions. [2023-11-17 11:55:21,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:21,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 841 transitions. [2023-11-17 11:55:21,874 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 14.5) internal successors, (841), 58 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 54.0) internal successors, (3186), 59 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,878 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 54.0) internal successors, (3186), 59 states have internal predecessors, (3186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:21,878 INFO L175 Difference]: Start difference. First operand has 202 places, 464 transitions, 5042 flow. Second operand 58 states and 841 transitions. [2023-11-17 11:55:21,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 1504 transitions, 19288 flow [2023-11-17 11:55:23,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 1504 transitions, 17862 flow, removed 642 selfloop flow, removed 9 redundant places. [2023-11-17 11:55:23,417 INFO L231 Difference]: Finished difference. Result has 286 places, 944 transitions, 12380 flow [2023-11-17 11:55:23,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=4494, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=12380, PETRI_PLACES=286, PETRI_TRANSITIONS=944} [2023-11-17 11:55:23,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 256 predicate places. [2023-11-17 11:55:23,418 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 944 transitions, 12380 flow [2023-11-17 11:55:23,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.4) internal successors, (235), 25 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:23,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:23,418 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:55:23,425 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 11:55:23,625 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 11:55:23,625 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 11:55:23,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 599566514, now seen corresponding path program 6 times [2023-11-17 11:55:23,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:23,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043568412] [2023-11-17 11:55:23,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:23,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:24,788 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 11:55:24,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:24,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043568412] [2023-11-17 11:55:24,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043568412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:24,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489714747] [2023-11-17 11:55:24,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:55:24,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:24,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:24,793 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 11:55:24,817 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 11:55:24,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:55:24,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:24,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:55:24,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:25,101 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 156 treesize of output 100 [2023-11-17 11:55:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:25,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:25,979 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:25,980 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 131 treesize of output 75 [2023-11-17 11:55:26,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:26,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489714747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:26,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:26,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 31 [2023-11-17 11:55:26,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974159796] [2023-11-17 11:55:26,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:26,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 11:55:26,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:26,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 11:55:26,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2023-11-17 11:55:26,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:55:26,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 944 transitions, 12380 flow. Second operand has 32 states, 32 states have (on average 9.15625) internal successors, (293), 32 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:26,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:26,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:55:26,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:32,626 INFO L124 PetriNetUnfolderBase]: 10469/17018 cut-off events. [2023-11-17 11:55:32,626 INFO L125 PetriNetUnfolderBase]: For 610247/610247 co-relation queries the response was YES. [2023-11-17 11:55:32,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169523 conditions, 17018 events. 10469/17018 cut-off events. For 610247/610247 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 122644 event pairs, 2152 based on Foata normal form. 14/15690 useless extension candidates. Maximal degree in co-relation 169407. Up to 6113 conditions per place. [2023-11-17 11:55:32,827 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 697 selfloop transitions, 435 changer transitions 50/1182 dead transitions. [2023-11-17 11:55:32,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 1182 transitions, 18894 flow [2023-11-17 11:55:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:55:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:55:32,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 289 transitions. [2023-11-17 11:55:32,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29732510288065844 [2023-11-17 11:55:32,829 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 289 transitions. [2023-11-17 11:55:32,829 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 289 transitions. [2023-11-17 11:55:32,829 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:32,829 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 289 transitions. [2023-11-17 11:55:32,830 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 16.055555555555557) internal successors, (289), 18 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 54.0) internal successors, (1026), 19 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,832 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 54.0) internal successors, (1026), 19 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:32,832 INFO L175 Difference]: Start difference. First operand has 286 places, 944 transitions, 12380 flow. Second operand 18 states and 289 transitions. [2023-11-17 11:55:32,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 1182 transitions, 18894 flow [2023-11-17 11:55:39,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 1182 transitions, 16329 flow, removed 1281 selfloop flow, removed 8 redundant places. [2023-11-17 11:55:39,355 INFO L231 Difference]: Finished difference. Result has 295 places, 981 transitions, 11920 flow [2023-11-17 11:55:39,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=10359, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=944, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=384, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=11920, PETRI_PLACES=295, PETRI_TRANSITIONS=981} [2023-11-17 11:55:39,357 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 265 predicate places. [2023-11-17 11:55:39,357 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 981 transitions, 11920 flow [2023-11-17 11:55:39,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 9.15625) internal successors, (293), 32 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:39,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:39,357 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:55:39,366 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 11:55:39,558 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 11:55:39,558 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 11:55:39,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:39,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1540187080, now seen corresponding path program 7 times [2023-11-17 11:55:39,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:39,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635958422] [2023-11-17 11:55:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:39,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:40,088 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:40,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:40,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635958422] [2023-11-17 11:55:40,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635958422] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:40,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058079008] [2023-11-17 11:55:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:55:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:40,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:40,090 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 11:55:40,091 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 11:55:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:40,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-17 11:55:40,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:40,403 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 191 treesize of output 123 [2023-11-17 11:55:40,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:40,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:41,447 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:41,448 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 166 treesize of output 94 [2023-11-17 11:55:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:55:41,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058079008] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:41,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:41,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 25 [2023-11-17 11:55:41,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351501068] [2023-11-17 11:55:41,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:41,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:55:41,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:41,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:55:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:55:41,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:55:41,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 981 transitions, 11920 flow. Second operand has 26 states, 26 states have (on average 9.384615384615385) internal successors, (244), 26 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:41,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:41,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:55:41,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:51,803 INFO L124 PetriNetUnfolderBase]: 14308/23585 cut-off events. [2023-11-17 11:55:51,803 INFO L125 PetriNetUnfolderBase]: For 737357/737357 co-relation queries the response was YES. [2023-11-17 11:55:51,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214093 conditions, 23585 events. 14308/23585 cut-off events. For 737357/737357 co-relation queries the response was YES. Maximal size of possible extension queue 1254. Compared 182651 event pairs, 2903 based on Foata normal form. 33/22330 useless extension candidates. Maximal degree in co-relation 213976. Up to 9334 conditions per place. [2023-11-17 11:55:52,054 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 1081 selfloop transitions, 702 changer transitions 93/1876 dead transitions. [2023-11-17 11:55:52,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 1876 transitions, 28120 flow [2023-11-17 11:55:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-17 11:55:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-11-17 11:55:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 675 transitions. [2023-11-17 11:55:52,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3125 [2023-11-17 11:55:52,057 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 675 transitions. [2023-11-17 11:55:52,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 675 transitions. [2023-11-17 11:55:52,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:52,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 675 transitions. [2023-11-17 11:55:52,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 16.875) internal successors, (675), 40 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:52,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 54.0) internal successors, (2214), 41 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 11:55:52,062 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 54.0) internal successors, (2214), 41 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 11:55:52,062 INFO L175 Difference]: Start difference. First operand has 295 places, 981 transitions, 11920 flow. Second operand 40 states and 675 transitions. [2023-11-17 11:55:52,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 1876 transitions, 28120 flow [2023-11-17 11:56:00,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1876 transitions, 27741 flow, removed 128 selfloop flow, removed 5 redundant places. [2023-11-17 11:56:00,099 INFO L231 Difference]: Finished difference. Result has 357 places, 1310 transitions, 18582 flow [2023-11-17 11:56:00,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=11731, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=18582, PETRI_PLACES=357, PETRI_TRANSITIONS=1310} [2023-11-17 11:56:00,101 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-11-17 11:56:00,101 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1310 transitions, 18582 flow [2023-11-17 11:56:00,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.384615384615385) internal successors, (244), 26 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:00,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:00,101 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:56:00,108 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 11:56:00,302 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 11:56:00,303 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 11:56:00,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:00,303 INFO L85 PathProgramCache]: Analyzing trace with hash -47038668, now seen corresponding path program 8 times [2023-11-17 11:56:00,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:00,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136686786] [2023-11-17 11:56:00,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:00,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:00,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:56:00,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:00,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136686786] [2023-11-17 11:56:00,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136686786] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:00,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638640627] [2023-11-17 11:56:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:56:00,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:00,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:00,820 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 11:56:00,823 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 11:56:00,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:56:00,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:00,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-17 11:56:00,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:01,190 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 49 treesize of output 33 [2023-11-17 11:56:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:56:01,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:01,684 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:01,684 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 166 treesize of output 94 [2023-11-17 11:56:01,841 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:56:01,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638640627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:01,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:01,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-17 11:56:01,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135235128] [2023-11-17 11:56:01,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:01,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 11:56:01,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:01,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 11:56:01,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-11-17 11:56:01,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:56:01,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1310 transitions, 18582 flow. Second operand has 22 states, 22 states have (on average 9.727272727272727) internal successors, (214), 22 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:01,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:01,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:56:01,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:13,314 INFO L124 PetriNetUnfolderBase]: 17702/29272 cut-off events. [2023-11-17 11:56:13,315 INFO L125 PetriNetUnfolderBase]: For 1009818/1009818 co-relation queries the response was YES. [2023-11-17 11:56:13,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284193 conditions, 29272 events. 17702/29272 cut-off events. For 1009818/1009818 co-relation queries the response was YES. Maximal size of possible extension queue 1575. Compared 235153 event pairs, 3071 based on Foata normal form. 46/27620 useless extension candidates. Maximal degree in co-relation 284049. Up to 10795 conditions per place. [2023-11-17 11:56:13,842 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 807 selfloop transitions, 909 changer transitions 215/1931 dead transitions. [2023-11-17 11:56:13,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1931 transitions, 33238 flow [2023-11-17 11:56:13,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 11:56:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 11:56:13,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 433 transitions. [2023-11-17 11:56:13,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29698216735253774 [2023-11-17 11:56:13,844 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 433 transitions. [2023-11-17 11:56:13,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 433 transitions. [2023-11-17 11:56:13,971 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:13,971 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 433 transitions. [2023-11-17 11:56:13,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 16.037037037037038) internal successors, (433), 27 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:13,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 54.0) internal successors, (1512), 28 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:13,974 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 54.0) internal successors, (1512), 28 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:13,974 INFO L175 Difference]: Start difference. First operand has 357 places, 1310 transitions, 18582 flow. Second operand 27 states and 433 transitions. [2023-11-17 11:56:13,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1931 transitions, 33238 flow [2023-11-17 11:56:29,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1931 transitions, 32178 flow, removed 490 selfloop flow, removed 9 redundant places. [2023-11-17 11:56:29,427 INFO L231 Difference]: Finished difference. Result has 379 places, 1461 transitions, 22846 flow [2023-11-17 11:56:29,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=17837, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=728, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=22846, PETRI_PLACES=379, PETRI_TRANSITIONS=1461} [2023-11-17 11:56:29,428 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 349 predicate places. [2023-11-17 11:56:29,428 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1461 transitions, 22846 flow [2023-11-17 11:56:29,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.727272727272727) internal successors, (214), 22 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:29,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:29,429 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:56:29,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 11:56:29,629 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 11:56:29,629 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 11:56:29,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:29,630 INFO L85 PathProgramCache]: Analyzing trace with hash 289352440, now seen corresponding path program 9 times [2023-11-17 11:56:29,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:29,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378678679] [2023-11-17 11:56:29,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:29,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:29,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:30,629 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 11:56:30,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:30,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378678679] [2023-11-17 11:56:30,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378678679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:30,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295977602] [2023-11-17 11:56:30,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:56:30,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:30,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:30,631 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 11:56:30,632 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 11:56:30,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:56:30,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:30,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 11:56:30,777 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:30,780 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 60 treesize of output 58 [2023-11-17 11:56:30,920 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 42 treesize of output 33 [2023-11-17 11:56:30,981 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 112 treesize of output 72 [2023-11-17 11:56:31,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:56:31,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:32,154 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:32,154 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 168 treesize of output 112 [2023-11-17 11:56:32,167 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 59 treesize of output 53 [2023-11-17 11:56:32,175 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 53 treesize of output 47 [2023-11-17 11:56:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:56:32,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295977602] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:32,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:32,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-11-17 11:56:32,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903448320] [2023-11-17 11:56:32,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-17 11:56:32,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:32,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-17 11:56:32,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1126, Unknown=1, NotChecked=0, Total=1260 [2023-11-17 11:56:32,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:56:32,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1461 transitions, 22846 flow. Second operand has 36 states, 36 states have (on average 8.944444444444445) internal successors, (322), 36 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:32,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:32,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:56:32,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:45,118 INFO L124 PetriNetUnfolderBase]: 17032/27921 cut-off events. [2023-11-17 11:56:45,118 INFO L125 PetriNetUnfolderBase]: For 987836/987836 co-relation queries the response was YES. [2023-11-17 11:56:45,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 277819 conditions, 27921 events. 17032/27921 cut-off events. For 987836/987836 co-relation queries the response was YES. Maximal size of possible extension queue 1529. Compared 219273 event pairs, 4672 based on Foata normal form. 7/26318 useless extension candidates. Maximal degree in co-relation 277672. Up to 15572 conditions per place. [2023-11-17 11:56:45,908 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 1075 selfloop transitions, 628 changer transitions 45/1748 dead transitions. [2023-11-17 11:56:45,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1748 transitions, 30625 flow [2023-11-17 11:56:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:56:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:56:45,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 352 transitions. [2023-11-17 11:56:45,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2834138486312399 [2023-11-17 11:56:45,910 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 352 transitions. [2023-11-17 11:56:45,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 352 transitions. [2023-11-17 11:56:45,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:45,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 352 transitions. [2023-11-17 11:56:45,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 15.304347826086957) internal successors, (352), 23 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:45,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 54.0) internal successors, (1296), 24 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:45,912 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 54.0) internal successors, (1296), 24 states have internal predecessors, (1296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:45,912 INFO L175 Difference]: Start difference. First operand has 379 places, 1461 transitions, 22846 flow. Second operand 23 states and 352 transitions. [2023-11-17 11:56:45,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1748 transitions, 30625 flow [2023-11-17 11:57:01,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1748 transitions, 29658 flow, removed 330 selfloop flow, removed 11 redundant places. [2023-11-17 11:57:01,699 INFO L231 Difference]: Finished difference. Result has 397 places, 1574 transitions, 25271 flow [2023-11-17 11:57:01,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=22009, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=891, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=25271, PETRI_PLACES=397, PETRI_TRANSITIONS=1574} [2023-11-17 11:57:01,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 367 predicate places. [2023-11-17 11:57:01,701 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 1574 transitions, 25271 flow [2023-11-17 11:57:01,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 8.944444444444445) internal successors, (322), 36 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:01,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:01,702 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:57:01,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-17 11:57:01,908 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 11:57:01,908 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 11:57:01,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:01,908 INFO L85 PathProgramCache]: Analyzing trace with hash -821483738, now seen corresponding path program 10 times [2023-11-17 11:57:01,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:01,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114525406] [2023-11-17 11:57:01,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:01,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:02,985 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 11:57:02,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:02,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114525406] [2023-11-17 11:57:02,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114525406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:02,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382588766] [2023-11-17 11:57:02,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:57:02,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:02,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:02,987 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 11:57:02,988 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 11:57:03,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:57:03,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:03,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:57:03,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:57:03,523 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 24 treesize of output 19 [2023-11-17 11:57:03,636 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 72 treesize of output 48 [2023-11-17 11:57:03,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:57:03,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:04,303 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:04,303 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 204 treesize of output 132 [2023-11-17 11:57:04,312 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 60 treesize of output 54 [2023-11-17 11:57:04,318 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 54 treesize of output 48 [2023-11-17 11:57:04,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:57:04,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382588766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:04,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:04,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 33 [2023-11-17 11:57:04,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725396816] [2023-11-17 11:57:04,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:04,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 11:57:04,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:04,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 11:57:04,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1060, Unknown=1, NotChecked=0, Total=1190 [2023-11-17 11:57:04,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:57:04,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 1574 transitions, 25271 flow. Second operand has 35 states, 35 states have (on average 9.028571428571428) internal successors, (316), 35 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:04,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:04,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:57:04,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:19,843 INFO L124 PetriNetUnfolderBase]: 18139/29701 cut-off events. [2023-11-17 11:57:19,844 INFO L125 PetriNetUnfolderBase]: For 1040150/1040150 co-relation queries the response was YES. [2023-11-17 11:57:20,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 297509 conditions, 29701 events. 18139/29701 cut-off events. For 1040150/1040150 co-relation queries the response was YES. Maximal size of possible extension queue 1612. Compared 235708 event pairs, 3043 based on Foata normal form. 32/28023 useless extension candidates. Maximal degree in co-relation 297353. Up to 14016 conditions per place. [2023-11-17 11:57:20,546 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 737 selfloop transitions, 995 changer transitions 274/2006 dead transitions. [2023-11-17 11:57:20,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 2006 transitions, 36706 flow [2023-11-17 11:57:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 11:57:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 11:57:20,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 469 transitions. [2023-11-17 11:57:20,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2895061728395062 [2023-11-17 11:57:20,548 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 469 transitions. [2023-11-17 11:57:20,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 469 transitions. [2023-11-17 11:57:20,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:20,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 469 transitions. [2023-11-17 11:57:20,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 15.633333333333333) internal successors, (469), 30 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:20,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 54.0) internal successors, (1674), 31 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:20,551 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 54.0) internal successors, (1674), 31 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:20,551 INFO L175 Difference]: Start difference. First operand has 397 places, 1574 transitions, 25271 flow. Second operand 30 states and 469 transitions. [2023-11-17 11:57:20,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 2006 transitions, 36706 flow [2023-11-17 11:57:39,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 2006 transitions, 36321 flow, removed 108 selfloop flow, removed 8 redundant places. [2023-11-17 11:57:39,240 INFO L231 Difference]: Finished difference. Result has 427 places, 1540 transitions, 27008 flow [2023-11-17 11:57:39,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=24918, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=903, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=27008, PETRI_PLACES=427, PETRI_TRANSITIONS=1540} [2023-11-17 11:57:39,242 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 397 predicate places. [2023-11-17 11:57:39,242 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 1540 transitions, 27008 flow [2023-11-17 11:57:39,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.028571428571428) internal successors, (316), 35 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:39,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:39,242 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:57:39,249 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 11:57:39,449 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 11:57:39,449 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 11:57:39,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1515479738, now seen corresponding path program 11 times [2023-11-17 11:57:39,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:39,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214901594] [2023-11-17 11:57:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:39,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:39,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:57:39,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214901594] [2023-11-17 11:57:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214901594] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014385806] [2023-11-17 11:57:39,919 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:57:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:39,920 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 11:57:39,921 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 11:57:40,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 11:57:40,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:40,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-17 11:57:40,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:40,324 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 149 treesize of output 97 [2023-11-17 11:57:40,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:57:40,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:41,051 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 11:57:41,052 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 135 treesize of output 70 [2023-11-17 11:57:41,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:57:41,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014385806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:41,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:41,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 21 [2023-11-17 11:57:41,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015760226] [2023-11-17 11:57:41,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:41,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 11:57:41,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:41,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 11:57:41,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2023-11-17 11:57:41,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:57:41,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1540 transitions, 27008 flow. Second operand has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:41,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:41,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:57:41,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:01,603 INFO L124 PetriNetUnfolderBase]: 21834/36069 cut-off events. [2023-11-17 11:58:01,604 INFO L125 PetriNetUnfolderBase]: For 1387710/1387710 co-relation queries the response was YES. [2023-11-17 11:58:02,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375362 conditions, 36069 events. 21834/36069 cut-off events. For 1387710/1387710 co-relation queries the response was YES. Maximal size of possible extension queue 1930. Compared 297810 event pairs, 2664 based on Foata normal form. 52/34047 useless extension candidates. Maximal degree in co-relation 375198. Up to 9660 conditions per place. [2023-11-17 11:58:02,580 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 1609 selfloop transitions, 1343 changer transitions 185/3137 dead transitions. [2023-11-17 11:58:02,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 3137 transitions, 61656 flow [2023-11-17 11:58:02,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-17 11:58:02,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-11-17 11:58:02,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 1030 transitions. [2023-11-17 11:58:02,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31790123456790126 [2023-11-17 11:58:02,584 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 1030 transitions. [2023-11-17 11:58:02,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 1030 transitions. [2023-11-17 11:58:02,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:02,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 1030 transitions. [2023-11-17 11:58:02,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 17.166666666666668) internal successors, (1030), 60 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:02,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 54.0) internal successors, (3294), 61 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:02,594 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 54.0) internal successors, (3294), 61 states have internal predecessors, (3294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:02,594 INFO L175 Difference]: Start difference. First operand has 427 places, 1540 transitions, 27008 flow. Second operand 60 states and 1030 transitions. [2023-11-17 11:58:02,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 3137 transitions, 61656 flow [2023-11-17 11:58:30,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 3137 transitions, 59472 flow, removed 829 selfloop flow, removed 21 redundant places. [2023-11-17 11:58:30,162 INFO L231 Difference]: Finished difference. Result has 478 places, 2064 transitions, 40704 flow [2023-11-17 11:58:30,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=26104, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=883, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=40704, PETRI_PLACES=478, PETRI_TRANSITIONS=2064} [2023-11-17 11:58:30,163 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 448 predicate places. [2023-11-17 11:58:30,164 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 2064 transitions, 40704 flow [2023-11-17 11:58:30,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 9.681818181818182) internal successors, (213), 22 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:30,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:30,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:58:30,169 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 11:58:30,364 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 11:58:30,365 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 11:58:30,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:30,365 INFO L85 PathProgramCache]: Analyzing trace with hash 299935332, now seen corresponding path program 12 times [2023-11-17 11:58:30,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:30,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449587117] [2023-11-17 11:58:30,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:30,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:30,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:31,303 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 11:58:31,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:31,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449587117] [2023-11-17 11:58:31,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449587117] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:31,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038293206] [2023-11-17 11:58:31,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:58:31,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:31,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:31,305 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 11:58:31,306 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 11:58:31,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:58:31,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:31,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 11:58:31,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:31,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:58:31,591 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 42 treesize of output 33 [2023-11-17 11:58:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:58:31,652 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 42 treesize of output 33 [2023-11-17 11:58:31,964 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 112 treesize of output 72 [2023-11-17 11:58:32,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:58:32,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:32,888 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:58:32,888 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 389 treesize of output 297 [2023-11-17 11:58:32,898 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 281 treesize of output 261 [2023-11-17 11:58:32,905 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 240 treesize of output 230 [2023-11-17 11:58:33,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:58:33,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038293206] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:33,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:33,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-11-17 11:58:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446866981] [2023-11-17 11:58:33,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:33,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 11:58:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 11:58:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1257, Unknown=12, NotChecked=0, Total=1406 [2023-11-17 11:58:33,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:58:33,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 2064 transitions, 40704 flow. Second operand has 38 states, 38 states have (on average 8.868421052631579) internal successors, (337), 38 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:33,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:33,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:58:33,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:58,507 INFO L124 PetriNetUnfolderBase]: 24363/39945 cut-off events. [2023-11-17 11:58:58,507 INFO L125 PetriNetUnfolderBase]: For 1689445/1689445 co-relation queries the response was YES. [2023-11-17 11:58:59,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 431489 conditions, 39945 events. 24363/39945 cut-off events. For 1689445/1689445 co-relation queries the response was YES. Maximal size of possible extension queue 2170. Compared 331496 event pairs, 3838 based on Foata normal form. 25/37776 useless extension candidates. Maximal degree in co-relation 431307. Up to 11230 conditions per place. [2023-11-17 11:58:59,783 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 1676 selfloop transitions, 1271 changer transitions 69/3016 dead transitions. [2023-11-17 11:58:59,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 3016 transitions, 65808 flow [2023-11-17 11:58:59,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 11:58:59,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 11:58:59,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 457 transitions. [2023-11-17 11:58:59,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30224867724867727 [2023-11-17 11:58:59,784 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 457 transitions. [2023-11-17 11:58:59,785 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 457 transitions. [2023-11-17 11:58:59,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:59,785 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 457 transitions. [2023-11-17 11:58:59,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 16.321428571428573) internal successors, (457), 28 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:59,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 54.0) internal successors, (1566), 29 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:59,788 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 54.0) internal successors, (1566), 29 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:59,788 INFO L175 Difference]: Start difference. First operand has 478 places, 2064 transitions, 40704 flow. Second operand 28 states and 457 transitions. [2023-11-17 11:58:59,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 3016 transitions, 65808 flow [2023-11-17 11:59:39,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 3016 transitions, 63673 flow, removed 901 selfloop flow, removed 10 redundant places. [2023-11-17 11:59:39,521 INFO L231 Difference]: Finished difference. Result has 506 places, 2478 transitions, 52250 flow [2023-11-17 11:59:39,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=38960, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=868, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=52250, PETRI_PLACES=506, PETRI_TRANSITIONS=2478} [2023-11-17 11:59:39,523 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 476 predicate places. [2023-11-17 11:59:39,523 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 2478 transitions, 52250 flow [2023-11-17 11:59:39,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 8.868421052631579) internal successors, (337), 38 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:39,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:39,524 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 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 11:59:39,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-17 11:59:39,733 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 11:59:39,734 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 11:59:39,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash 70089352, now seen corresponding path program 13 times [2023-11-17 11:59:39,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:39,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294801454] [2023-11-17 11:59:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:39,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:39,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:59:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:40,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294801454] [2023-11-17 11:59:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294801454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:40,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757849666] [2023-11-17 11:59:40,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:59:40,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:40,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:40,279 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 11:59:40,280 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 11:59:40,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:40,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-17 11:59:40,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:40,853 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 135 treesize of output 87 [2023-11-17 11:59:40,980 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:59:40,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:41,613 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:41,614 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 195 treesize of output 107 [2023-11-17 11:59:41,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 11:59:41,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757849666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:41,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:41,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 27 [2023-11-17 11:59:41,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278953684] [2023-11-17 11:59:41,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:41,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:59:41,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:41,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:59:41,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-11-17 11:59:41,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 11:59:41,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 2478 transitions, 52250 flow. Second operand has 28 states, 28 states have (on average 9.142857142857142) internal successors, (256), 28 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:41,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:41,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 11:59:41,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:17,051 INFO L124 PetriNetUnfolderBase]: 27061/45143 cut-off events. [2023-11-17 12:00:17,052 INFO L125 PetriNetUnfolderBase]: For 2062290/2062290 co-relation queries the response was YES. [2023-11-17 12:00:18,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516952 conditions, 45143 events. 27061/45143 cut-off events. For 2062290/2062290 co-relation queries the response was YES. Maximal size of possible extension queue 2535. Compared 390332 event pairs, 3545 based on Foata normal form. 31/42392 useless extension candidates. Maximal degree in co-relation 516761. Up to 12248 conditions per place. [2023-11-17 12:00:19,099 INFO L140 encePairwiseOnDemand]: 40/54 looper letters, 1265 selfloop transitions, 2148 changer transitions 88/3501 dead transitions. [2023-11-17 12:00:19,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 3501 transitions, 80452 flow [2023-11-17 12:00:19,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-17 12:00:19,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-11-17 12:00:19,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 1046 transitions. [2023-11-17 12:00:19,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28073000536768655 [2023-11-17 12:00:19,102 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 1046 transitions. [2023-11-17 12:00:19,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 1046 transitions. [2023-11-17 12:00:19,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:19,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 1046 transitions. [2023-11-17 12:00:19,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 15.159420289855072) internal successors, (1046), 69 states have internal predecessors, (1046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:19,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 54.0) internal successors, (3780), 70 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:19,109 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 54.0) internal successors, (3780), 70 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:19,110 INFO L175 Difference]: Start difference. First operand has 506 places, 2478 transitions, 52250 flow. Second operand 69 states and 1046 transitions. [2023-11-17 12:00:19,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 3501 transitions, 80452 flow [2023-11-17 12:01:40,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 3501 transitions, 77775 flow, removed 1006 selfloop flow, removed 8 redundant places. [2023-11-17 12:01:40,274 INFO L231 Difference]: Finished difference. Result has 607 places, 3044 transitions, 70411 flow [2023-11-17 12:01:40,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=50338, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=769, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=70411, PETRI_PLACES=607, PETRI_TRANSITIONS=3044} [2023-11-17 12:01:40,276 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 577 predicate places. [2023-11-17 12:01:40,276 INFO L495 AbstractCegarLoop]: Abstraction has has 607 places, 3044 transitions, 70411 flow [2023-11-17 12:01:40,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 9.142857142857142) internal successors, (256), 28 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:40,277 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:40,282 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 12:01:40,481 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 12:01:40,481 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 12:01:40,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:40,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1901835156, now seen corresponding path program 14 times [2023-11-17 12:01:40,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:40,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667026068] [2023-11-17 12:01:40,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:40,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:40,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:01:40,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667026068] [2023-11-17 12:01:40,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667026068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560444243] [2023-11-17 12:01:40,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:40,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:40,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:41,000 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 12:01:41,001 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 12:01:41,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:41,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:41,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 12:01:41,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:41,427 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 70 treesize of output 46 [2023-11-17 12:01:41,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:01:41,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:41,852 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-17 12:01:41,853 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 135 treesize of output 70 [2023-11-17 12:01:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 12:01:41,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560444243] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:41,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:41,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-11-17 12:01:41,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735020733] [2023-11-17 12:01:41,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:41,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 12:01:41,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:41,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 12:01:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-11-17 12:01:41,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 54 [2023-11-17 12:01:41,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 607 places, 3044 transitions, 70411 flow. Second operand has 24 states, 24 states have (on average 9.5) internal successors, (228), 24 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:41,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:41,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 54 [2023-11-17 12:01:41,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand