/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-chromosome-trans.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 11:52:51,543 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 11:52:51,611 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 11:52:51,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 11:52:51,636 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 11:52:51,637 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 11:52:51,637 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 11:52:51,638 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 11:52:51,638 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 11:52:51,641 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 11:52:51,641 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 11:52:51,642 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 11:52:51,642 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 11:52:51,643 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 11:52:51,643 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 11:52:51,643 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 11:52:51,643 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 11:52:51,643 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 11:52:51,643 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 11:52:51,644 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 11:52:51,644 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 11:52:51,644 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 11:52:51,645 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 11:52:51,645 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 11:52:51,645 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 11:52:51,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:52:51,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 11:52:51,646 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 11:52:51,646 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 11:52:51,647 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 11:52:51,647 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 11:52:51,647 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 11:52:51,648 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 11:52:51,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 11:52:51,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 11:52:51,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 11:52:51,859 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 11:52:51,859 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 11:52:51,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-11-17 11:52:52,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 11:52:53,120 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 11:52:53,123 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/chl-chromosome-trans.wvr.c [2023-11-17 11:52:53,130 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b917b770/6bab6f15cf04480eb3d8b3827dff3d50/FLAG91c6b7fac [2023-11-17 11:52:53,145 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b917b770/6bab6f15cf04480eb3d8b3827dff3d50 [2023-11-17 11:52:53,148 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 11:52:53,149 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 11:52:53,151 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 11:52:53,151 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 11:52:53,154 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 11:52:53,154 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,155 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@171aee89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53, skipping insertion in model container [2023-11-17 11:52:53,155 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,182 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 11:52:53,316 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-chromosome-trans.wvr.c[3073,3086] [2023-11-17 11:52:53,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:52:53,334 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 11:52:53,370 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-chromosome-trans.wvr.c[3073,3086] [2023-11-17 11:52:53,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 11:52:53,388 INFO L206 MainTranslator]: Completed translation [2023-11-17 11:52:53,388 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53 WrapperNode [2023-11-17 11:52:53,388 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 11:52:53,389 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 11:52:53,389 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 11:52:53,389 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 11:52:53,394 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,424 INFO L138 Inliner]: procedures = 26, calls = 46, calls flagged for inlining = 16, calls inlined = 24, statements flattened = 282 [2023-11-17 11:52:53,424 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 11:52:53,425 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 11:52:53,425 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 11:52:53,425 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 11:52:53,431 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,435 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,435 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,442 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,455 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,457 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,458 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,461 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 11:52:53,462 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 11:52:53,462 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 11:52:53,462 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 11:52:53,462 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (1/1) ... [2023-11-17 11:52:53,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 11:52:53,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:53,502 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 11:52:53,516 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 11:52:53,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 11:52:53,531 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 11:52:53,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 11:52:53,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-11-17 11:52:53,532 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-17 11:52:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 11:52:53,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 11:52:53,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 11:52:53,534 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 11:52:53,618 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 11:52:53,619 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 11:52:53,900 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 11:52:54,257 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 11:52:54,258 INFO L307 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-17 11:52:54,260 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:52:54 BoogieIcfgContainer [2023-11-17 11:52:54,260 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 11:52:54,262 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 11:52:54,262 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 11:52:54,264 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 11:52:54,264 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 11:52:53" (1/3) ... [2023-11-17 11:52:54,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458ebcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:52:54, skipping insertion in model container [2023-11-17 11:52:54,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 11:52:53" (2/3) ... [2023-11-17 11:52:54,265 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458ebcbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 11:52:54, skipping insertion in model container [2023-11-17 11:52:54,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 11:52:54" (3/3) ... [2023-11-17 11:52:54,266 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-trans.wvr.c [2023-11-17 11:52:54,279 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 11:52:54,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 11:52:54,280 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 11:52:54,328 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 11:52:54,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 33 transitions, 87 flow [2023-11-17 11:52:54,393 INFO L124 PetriNetUnfolderBase]: 6/30 cut-off events. [2023-11-17 11:52:54,393 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:52:54,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43 conditions, 30 events. 6/30 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 20 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-17 11:52:54,398 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 33 transitions, 87 flow [2023-11-17 11:52:54,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 29 transitions, 76 flow [2023-11-17 11:52:54,409 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 11:52:54,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 33 places, 29 transitions, 76 flow [2023-11-17 11:52:54,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 33 places, 29 transitions, 76 flow [2023-11-17 11:52:54,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 33 places, 29 transitions, 76 flow [2023-11-17 11:52:54,441 INFO L124 PetriNetUnfolderBase]: 6/29 cut-off events. [2023-11-17 11:52:54,441 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:52:54,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 29 events. 6/29 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 0 based on Foata normal form. 0/23 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2023-11-17 11:52:54,442 INFO L119 LiptonReduction]: Number of co-enabled transitions 144 [2023-11-17 11:52:54,490 INFO L134 LiptonReduction]: Checked pairs total: 138 [2023-11-17 11:52:54,490 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 11:52:54,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 11:52:54,511 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;@4635eb23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 11:52:54,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-17 11:52:54,524 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 11:52:54,524 INFO L124 PetriNetUnfolderBase]: 6/27 cut-off events. [2023-11-17 11:52:54,524 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-11-17 11:52:54,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:54,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:54,525 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 11:52:54,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1680398588, now seen corresponding path program 1 times [2023-11-17 11:52:54,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:54,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274967417] [2023-11-17 11:52:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:54,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:54,904 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 11:52:54,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:54,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274967417] [2023-11-17 11:52:54,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274967417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:54,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:54,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:52:54,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555266077] [2023-11-17 11:52:54,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:54,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 11:52:54,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:54,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 11:52:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 11:52:54,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:54,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 74 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:54,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:54,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:54,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:55,096 INFO L124 PetriNetUnfolderBase]: 223/334 cut-off events. [2023-11-17 11:52:55,096 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-11-17 11:52:55,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 712 conditions, 334 events. 223/334 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 773 event pairs, 138 based on Foata normal form. 0/249 useless extension candidates. Maximal degree in co-relation 534. Up to 332 conditions per place. [2023-11-17 11:52:55,101 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 25 selfloop transitions, 6 changer transitions 0/31 dead transitions. [2023-11-17 11:52:55,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 31 transitions, 142 flow [2023-11-17 11:52:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:52:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:52:55,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 46 transitions. [2023-11-17 11:52:55,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2023-11-17 11:52:55,111 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 46 transitions. [2023-11-17 11:52:55,111 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 46 transitions. [2023-11-17 11:52:55,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:55,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 46 transitions. [2023-11-17 11:52:55,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,120 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 74 flow. Second operand 3 states and 46 transitions. [2023-11-17 11:52:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 31 transitions, 142 flow [2023-11-17 11:52:55,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 130 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-11-17 11:52:55,125 INFO L231 Difference]: Finished difference. Result has 29 places, 31 transitions, 94 flow [2023-11-17 11:52:55,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=29, PETRI_TRANSITIONS=31} [2023-11-17 11:52:55,129 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -3 predicate places. [2023-11-17 11:52:55,129 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 31 transitions, 94 flow [2023-11-17 11:52:55,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:55,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:55,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 11:52:55,130 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 11:52:55,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:55,130 INFO L85 PathProgramCache]: Analyzing trace with hash -439021008, now seen corresponding path program 1 times [2023-11-17 11:52:55,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:55,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355249325] [2023-11-17 11:52:55,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:55,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:52:55,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:55,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355249325] [2023-11-17 11:52:55,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355249325] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:55,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:55,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 11:52:55,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999086426] [2023-11-17 11:52:55,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:55,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:55,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:55,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:55,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:52:55,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 31 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 11:52:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:55,486 INFO L124 PetriNetUnfolderBase]: 341/505 cut-off events. [2023-11-17 11:52:55,486 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-17 11:52:55,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 505 events. 341/505 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1386 event pairs, 138 based on Foata normal form. 1/369 useless extension candidates. Maximal degree in co-relation 1009. Up to 335 conditions per place. [2023-11-17 11:52:55,490 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 41 selfloop transitions, 2 changer transitions 2/45 dead transitions. [2023-11-17 11:52:55,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 45 transitions, 215 flow [2023-11-17 11:52:55,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 11:52:55,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 11:52:55,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2023-11-17 11:52:55,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392156862745098 [2023-11-17 11:52:55,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 55 transitions. [2023-11-17 11:52:55,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 55 transitions. [2023-11-17 11:52:55,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:55,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 55 transitions. [2023-11-17 11:52:55,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,495 INFO L175 Difference]: Start difference. First operand has 29 places, 31 transitions, 94 flow. Second operand 3 states and 55 transitions. [2023-11-17 11:52:55,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 45 transitions, 215 flow [2023-11-17 11:52:55,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 45 transitions, 209 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:55,497 INFO L231 Difference]: Finished difference. Result has 31 places, 32 transitions, 100 flow [2023-11-17 11:52:55,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=31, PETRI_TRANSITIONS=32} [2023-11-17 11:52:55,498 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -1 predicate places. [2023-11-17 11:52:55,498 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 32 transitions, 100 flow [2023-11-17 11:52:55,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 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 11:52:55,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:55,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:55,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 11:52:55,499 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 11:52:55,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:55,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1343625694, now seen corresponding path program 1 times [2023-11-17 11:52:55,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:55,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948772307] [2023-11-17 11:52:55,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:55,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:55,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:52:55,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:55,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948772307] [2023-11-17 11:52:55,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948772307] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:55,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416233115] [2023-11-17 11:52:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:55,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:55,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:55,604 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 11:52:55,623 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 11:52:55,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:55,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:52:55,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:52:55,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 11:52:55,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416233115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:55,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:55,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-11-17 11:52:55,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144747290] [2023-11-17 11:52:55,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:55,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 11:52:55,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 11:52:55,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:52:55,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:55,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 32 transitions, 100 flow. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 11:52:55,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:55,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:55,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:55,932 INFO L124 PetriNetUnfolderBase]: 341/514 cut-off events. [2023-11-17 11:52:55,932 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2023-11-17 11:52:55,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1170 conditions, 514 events. 341/514 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1353 event pairs, 228 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 1108. Up to 503 conditions per place. [2023-11-17 11:52:55,934 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 26 selfloop transitions, 15 changer transitions 0/41 dead transitions. [2023-11-17 11:52:55,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 41 transitions, 218 flow [2023-11-17 11:52:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 11:52:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 11:52:55,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 73 transitions. [2023-11-17 11:52:55,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35784313725490197 [2023-11-17 11:52:55,937 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 73 transitions. [2023-11-17 11:52:55,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 73 transitions. [2023-11-17 11:52:55,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:55,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 73 transitions. [2023-11-17 11:52:55,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,939 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 34.0) internal successors, (238), 7 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:55,939 INFO L175 Difference]: Start difference. First operand has 31 places, 32 transitions, 100 flow. Second operand 6 states and 73 transitions. [2023-11-17 11:52:55,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 41 transitions, 218 flow [2023-11-17 11:52:55,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:55,941 INFO L231 Difference]: Finished difference. Result has 38 places, 41 transitions, 194 flow [2023-11-17 11:52:55,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=194, PETRI_PLACES=38, PETRI_TRANSITIONS=41} [2023-11-17 11:52:55,942 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 6 predicate places. [2023-11-17 11:52:55,942 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 41 transitions, 194 flow [2023-11-17 11:52:55,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 8 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 11:52:55,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:55,943 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:55,948 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 11:52:56,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:56,150 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 11:52:56,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:56,150 INFO L85 PathProgramCache]: Analyzing trace with hash -498827400, now seen corresponding path program 2 times [2023-11-17 11:52:56,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:56,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128370613] [2023-11-17 11:52:56,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:56,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 11:52:56,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:56,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128370613] [2023-11-17 11:52:56,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128370613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:56,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328247557] [2023-11-17 11:52:56,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:52:56,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:56,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:56,342 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 11:52:56,384 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 11:52:56,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-17 11:52:56,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:56,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:52:56,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:56,510 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:52:56,510 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:52:56,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328247557] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:56,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:52:56,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-17 11:52:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373031716] [2023-11-17 11:52:56,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:56,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:56,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:56,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:56,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:52:56,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:56,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 41 transitions, 194 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:56,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:56,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:56,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:56,704 INFO L124 PetriNetUnfolderBase]: 567/859 cut-off events. [2023-11-17 11:52:56,704 INFO L125 PetriNetUnfolderBase]: For 109/109 co-relation queries the response was YES. [2023-11-17 11:52:56,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1936 conditions, 859 events. 567/859 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2924 event pairs, 228 based on Foata normal form. 22/723 useless extension candidates. Maximal degree in co-relation 1847. Up to 515 conditions per place. [2023-11-17 11:52:56,707 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 67 selfloop transitions, 3 changer transitions 2/72 dead transitions. [2023-11-17 11:52:56,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 72 transitions, 421 flow [2023-11-17 11:52:56,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:56,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2023-11-17 11:52:56,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5441176470588235 [2023-11-17 11:52:56,708 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 74 transitions. [2023-11-17 11:52:56,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 74 transitions. [2023-11-17 11:52:56,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:56,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 74 transitions. [2023-11-17 11:52:56,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:56,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:56,709 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:56,709 INFO L175 Difference]: Start difference. First operand has 38 places, 41 transitions, 194 flow. Second operand 4 states and 74 transitions. [2023-11-17 11:52:56,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 72 transitions, 421 flow [2023-11-17 11:52:56,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 72 transitions, 397 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:56,711 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 190 flow [2023-11-17 11:52:56,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2023-11-17 11:52:56,712 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 10 predicate places. [2023-11-17 11:52:56,712 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 190 flow [2023-11-17 11:52:56,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:56,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:56,712 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:56,719 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 11:52:56,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-17 11:52:56,920 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 11:52:56,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1564867594, now seen corresponding path program 3 times [2023-11-17 11:52:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:56,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054895342] [2023-11-17 11:52:56,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:56,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:56,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 11:52:57,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:57,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054895342] [2023-11-17 11:52:57,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054895342] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:57,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688818590] [2023-11-17 11:52:57,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:52:57,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:57,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:57,053 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 11:52:57,056 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 11:52:57,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-17 11:52:57,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:57,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-17 11:52:57,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-17 11:52:57,206 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-17 11:52:57,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688818590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:57,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-17 11:52:57,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-17 11:52:57,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226032335] [2023-11-17 11:52:57,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:57,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:57,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:57,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:57,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-17 11:52:57,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:57,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:57,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:57,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:57,391 INFO L124 PetriNetUnfolderBase]: 625/941 cut-off events. [2023-11-17 11:52:57,391 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2023-11-17 11:52:57,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2477 conditions, 941 events. 625/941 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3347 event pairs, 110 based on Foata normal form. 24/833 useless extension candidates. Maximal degree in co-relation 2397. Up to 652 conditions per place. [2023-11-17 11:52:57,395 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 61 selfloop transitions, 5 changer transitions 1/67 dead transitions. [2023-11-17 11:52:57,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 67 transitions, 404 flow [2023-11-17 11:52:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:57,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 65 transitions. [2023-11-17 11:52:57,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47794117647058826 [2023-11-17 11:52:57,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 65 transitions. [2023-11-17 11:52:57,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 65 transitions. [2023-11-17 11:52:57,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:57,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 65 transitions. [2023-11-17 11:52:57,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,397 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,397 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 190 flow. Second operand 4 states and 65 transitions. [2023-11-17 11:52:57,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 67 transitions, 404 flow [2023-11-17 11:52:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 393 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:57,399 INFO L231 Difference]: Finished difference. Result has 46 places, 45 transitions, 215 flow [2023-11-17 11:52:57,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=46, PETRI_TRANSITIONS=45} [2023-11-17 11:52:57,400 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 14 predicate places. [2023-11-17 11:52:57,400 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 45 transitions, 215 flow [2023-11-17 11:52:57,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:57,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:57,400 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:57,407 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 11:52:57,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:57,605 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 11:52:57,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:57,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1778298030, now seen corresponding path program 4 times [2023-11-17 11:52:57,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:57,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136036630] [2023-11-17 11:52:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:57,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 11:52:57,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:57,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136036630] [2023-11-17 11:52:57,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136036630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:57,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551435469] [2023-11-17 11:52:57,765 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:52:57,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:57,782 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 11:52:57,783 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 11:52:57,908 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:52:57,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:52:57,910 INFO L262 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 11:52:57,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:52:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 11:52:57,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:52:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-17 11:52:58,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551435469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:52:58,011 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:52:58,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-17 11:52:58,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035746396] [2023-11-17 11:52:58,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:52:58,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 11:52:58,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:58,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 11:52:58,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2023-11-17 11:52:58,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:58,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 45 transitions, 215 flow. Second operand has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:58,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:58,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:58,171 INFO L124 PetriNetUnfolderBase]: 625/944 cut-off events. [2023-11-17 11:52:58,172 INFO L125 PetriNetUnfolderBase]: For 978/978 co-relation queries the response was YES. [2023-11-17 11:52:58,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2614 conditions, 944 events. 625/944 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3105 event pairs, 418 based on Foata normal form. 1/813 useless extension candidates. Maximal degree in co-relation 2519. Up to 930 conditions per place. [2023-11-17 11:52:58,175 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 30 selfloop transitions, 18 changer transitions 0/48 dead transitions. [2023-11-17 11:52:58,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 48 transitions, 329 flow [2023-11-17 11:52:58,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 11:52:58,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 11:52:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 74 transitions. [2023-11-17 11:52:58,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31092436974789917 [2023-11-17 11:52:58,176 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 74 transitions. [2023-11-17 11:52:58,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 74 transitions. [2023-11-17 11:52:58,176 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:58,176 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 74 transitions. [2023-11-17 11:52:58,177 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 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 11:52:58,177 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 34.0) internal successors, (272), 8 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 11:52:58,177 INFO L175 Difference]: Start difference. First operand has 46 places, 45 transitions, 215 flow. Second operand 7 states and 74 transitions. [2023-11-17 11:52:58,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 48 transitions, 329 flow [2023-11-17 11:52:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 48 transitions, 326 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 11:52:58,179 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 280 flow [2023-11-17 11:52:58,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=280, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-11-17 11:52:58,180 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 20 predicate places. [2023-11-17 11:52:58,180 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 280 flow [2023-11-17 11:52:58,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.846153846153846) internal successors, (89), 13 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:58,180 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:58,194 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 11:52:58,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:58,385 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 11:52:58,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:58,386 INFO L85 PathProgramCache]: Analyzing trace with hash -658754662, now seen corresponding path program 5 times [2023-11-17 11:52:58,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:58,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955686184] [2023-11-17 11:52:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:58,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:52:58,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:58,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955686184] [2023-11-17 11:52:58,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955686184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:58,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:58,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:52:58,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693199393] [2023-11-17 11:52:58,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:52:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:52:58,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:52:58,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:58,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 280 flow. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:58,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:58,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:58,897 INFO L124 PetriNetUnfolderBase]: 1105/1676 cut-off events. [2023-11-17 11:52:58,897 INFO L125 PetriNetUnfolderBase]: For 1334/1334 co-relation queries the response was YES. [2023-11-17 11:52:58,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4533 conditions, 1676 events. 1105/1676 cut-off events. For 1334/1334 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6927 event pairs, 406 based on Foata normal form. 20/1446 useless extension candidates. Maximal degree in co-relation 4418. Up to 979 conditions per place. [2023-11-17 11:52:58,904 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 78 selfloop transitions, 3 changer transitions 16/97 dead transitions. [2023-11-17 11:52:58,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 97 transitions, 661 flow [2023-11-17 11:52:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:52:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:52:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2023-11-17 11:52:58,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117647058823529 [2023-11-17 11:52:58,906 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 87 transitions. [2023-11-17 11:52:58,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 87 transitions. [2023-11-17 11:52:58,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:58,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 87 transitions. [2023-11-17 11:52:58,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,908 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,908 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 280 flow. Second operand 5 states and 87 transitions. [2023-11-17 11:52:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 97 transitions, 661 flow [2023-11-17 11:52:58,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 97 transitions, 625 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-11-17 11:52:58,913 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 266 flow [2023-11-17 11:52:58,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-11-17 11:52:58,913 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 23 predicate places. [2023-11-17 11:52:58,914 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 266 flow [2023-11-17 11:52:58,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:58,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:58,914 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:58,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 11:52:58,914 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 11:52:58,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:58,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1634649666, now seen corresponding path program 6 times [2023-11-17 11:52:58,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:58,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150849348] [2023-11-17 11:52:58,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:58,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:52:59,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:59,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150849348] [2023-11-17 11:52:59,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150849348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:59,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:59,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-17 11:52:59,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709357939] [2023-11-17 11:52:59,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:59,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-17 11:52:59,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:59,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-17 11:52:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-17 11:52:59,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:59,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 266 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:59,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:59,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:59,311 INFO L124 PetriNetUnfolderBase]: 843/1258 cut-off events. [2023-11-17 11:52:59,311 INFO L125 PetriNetUnfolderBase]: For 1826/1826 co-relation queries the response was YES. [2023-11-17 11:52:59,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4011 conditions, 1258 events. 843/1258 cut-off events. For 1826/1826 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4684 event pairs, 352 based on Foata normal form. 48/1174 useless extension candidates. Maximal degree in co-relation 3910. Up to 885 conditions per place. [2023-11-17 11:52:59,317 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 69 selfloop transitions, 6 changer transitions 3/78 dead transitions. [2023-11-17 11:52:59,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 533 flow [2023-11-17 11:52:59,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-17 11:52:59,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-17 11:52:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2023-11-17 11:52:59,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5073529411764706 [2023-11-17 11:52:59,318 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 69 transitions. [2023-11-17 11:52:59,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 69 transitions. [2023-11-17 11:52:59,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:59,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 69 transitions. [2023-11-17 11:52:59,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,319 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 266 flow. Second operand 4 states and 69 transitions. [2023-11-17 11:52:59,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 533 flow [2023-11-17 11:52:59,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 516 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-11-17 11:52:59,322 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 283 flow [2023-11-17 11:52:59,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=283, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2023-11-17 11:52:59,323 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 24 predicate places. [2023-11-17 11:52:59,323 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 283 flow [2023-11-17 11:52:59,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:59,323 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:59,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-17 11:52:59,323 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 11:52:59,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:59,324 INFO L85 PathProgramCache]: Analyzing trace with hash -179987201, now seen corresponding path program 1 times [2023-11-17 11:52:59,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:59,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629942269] [2023-11-17 11:52:59,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:59,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:52:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:59,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629942269] [2023-11-17 11:52:59,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629942269] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:52:59,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:52:59,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:52:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673979575] [2023-11-17 11:52:59,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:52:59,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:52:59,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:52:59,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:52:59,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:52:59,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:52:59,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 283 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:52:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:52:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:52:59,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:52:59,733 INFO L124 PetriNetUnfolderBase]: 920/1364 cut-off events. [2023-11-17 11:52:59,733 INFO L125 PetriNetUnfolderBase]: For 2281/2281 co-relation queries the response was YES. [2023-11-17 11:52:59,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4417 conditions, 1364 events. 920/1364 cut-off events. For 2281/2281 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5194 event pairs, 293 based on Foata normal form. 14/1238 useless extension candidates. Maximal degree in co-relation 4316. Up to 763 conditions per place. [2023-11-17 11:52:59,739 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 73 selfloop transitions, 6 changer transitions 14/93 dead transitions. [2023-11-17 11:52:59,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 93 transitions, 649 flow [2023-11-17 11:52:59,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:52:59,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:52:59,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2023-11-17 11:52:59,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5058823529411764 [2023-11-17 11:52:59,740 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 86 transitions. [2023-11-17 11:52:59,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 86 transitions. [2023-11-17 11:52:59,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:52:59,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 86 transitions. [2023-11-17 11:52:59,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 17.2) internal successors, (86), 5 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,741 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:52:59,741 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 283 flow. Second operand 5 states and 86 transitions. [2023-11-17 11:52:59,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 93 transitions, 649 flow [2023-11-17 11:52:59,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 93 transitions, 609 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-11-17 11:52:59,745 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 307 flow [2023-11-17 11:52:59,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=267, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=307, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2023-11-17 11:52:59,745 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 27 predicate places. [2023-11-17 11:52:59,745 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 307 flow [2023-11-17 11:52:59,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:52:59,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:52:59,746 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:52:59,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 11:52:59,746 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 11:52:59,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:52:59,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1115096375, now seen corresponding path program 2 times [2023-11-17 11:52:59,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:52:59,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970516194] [2023-11-17 11:52:59,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:52:59,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:52:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:52:59,973 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:52:59,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:52:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970516194] [2023-11-17 11:52:59,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970516194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:52:59,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296735478] [2023-11-17 11:52:59,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:52:59,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:52:59,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:52:59,974 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 11:53:00,002 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 11:53:00,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:00,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:00,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 11:53:00,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:00,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:00,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296735478] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:00,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 11:53:00,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 8 [2023-11-17 11:53:00,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076229954] [2023-11-17 11:53:00,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:00,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:53:00,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:00,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:53:00,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-17 11:53:00,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:00,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 307 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:00,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:00,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:00,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:00,414 INFO L124 PetriNetUnfolderBase]: 930/1369 cut-off events. [2023-11-17 11:53:00,415 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2023-11-17 11:53:00,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4655 conditions, 1369 events. 930/1369 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 4985 event pairs, 155 based on Foata normal form. 24/1253 useless extension candidates. Maximal degree in co-relation 4552. Up to 515 conditions per place. [2023-11-17 11:53:00,421 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 91 selfloop transitions, 9 changer transitions 3/103 dead transitions. [2023-11-17 11:53:00,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 103 transitions, 750 flow [2023-11-17 11:53:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:53:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:53:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-17 11:53:00,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2023-11-17 11:53:00,422 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-17 11:53:00,422 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-17 11:53:00,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:00,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-17 11:53:00,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:00,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:00,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:00,423 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 307 flow. Second operand 5 states and 83 transitions. [2023-11-17 11:53:00,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 103 transitions, 750 flow [2023-11-17 11:53:00,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 103 transitions, 735 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-11-17 11:53:00,428 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 360 flow [2023-11-17 11:53:00,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=360, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2023-11-17 11:53:00,428 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 30 predicate places. [2023-11-17 11:53:00,428 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 360 flow [2023-11-17 11:53:00,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:00,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:00,429 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:00,434 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 11:53:00,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-17 11:53:00,634 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 11:53:00,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:00,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1940831279, now seen corresponding path program 3 times [2023-11-17 11:53:00,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:00,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328054718] [2023-11-17 11:53:00,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:00,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:00,815 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:00,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:00,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328054718] [2023-11-17 11:53:00,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328054718] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:00,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703266977] [2023-11-17 11:53:00,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:00,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:00,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:00,817 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 11:53:00,823 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 11:53:01,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:53:01,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:01,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-17 11:53:01,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:01,113 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:01,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:01,182 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:01,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703266977] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:01,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-17 11:53:01,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 11 [2023-11-17 11:53:01,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782705905] [2023-11-17 11:53:01,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:01,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:53:01,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:01,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:53:01,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2023-11-17 11:53:01,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:01,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 360 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:01,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:01,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:01,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:01,407 INFO L124 PetriNetUnfolderBase]: 988/1451 cut-off events. [2023-11-17 11:53:01,407 INFO L125 PetriNetUnfolderBase]: For 3277/3277 co-relation queries the response was YES. [2023-11-17 11:53:01,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5087 conditions, 1451 events. 988/1451 cut-off events. For 3277/3277 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5418 event pairs, 301 based on Foata normal form. 24/1331 useless extension candidates. Maximal degree in co-relation 4982. Up to 811 conditions per place. [2023-11-17 11:53:01,414 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 83 selfloop transitions, 10 changer transitions 1/94 dead transitions. [2023-11-17 11:53:01,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 94 transitions, 693 flow [2023-11-17 11:53:01,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:53:01,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:53:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2023-11-17 11:53:01,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49411764705882355 [2023-11-17 11:53:01,415 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 84 transitions. [2023-11-17 11:53:01,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 84 transitions. [2023-11-17 11:53:01,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:01,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 84 transitions. [2023-11-17 11:53:01,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,415 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:01,416 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 360 flow. Second operand 5 states and 84 transitions. [2023-11-17 11:53:01,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 94 transitions, 693 flow [2023-11-17 11:53:01,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 94 transitions, 684 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 11:53:01,419 INFO L231 Difference]: Finished difference. Result has 65 places, 58 transitions, 382 flow [2023-11-17 11:53:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=382, PETRI_PLACES=65, PETRI_TRANSITIONS=58} [2023-11-17 11:53:01,420 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 33 predicate places. [2023-11-17 11:53:01,420 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 58 transitions, 382 flow [2023-11-17 11:53:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:01,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:01,420 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:01,445 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 11:53:01,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:01,625 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 11:53:01,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1432994663, now seen corresponding path program 4 times [2023-11-17 11:53:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:01,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530515960] [2023-11-17 11:53:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:01,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:01,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:01,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530515960] [2023-11-17 11:53:01,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530515960] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:53:01,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:53:01,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:53:01,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880374235] [2023-11-17 11:53:01,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:01,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:53:01,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:01,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:53:01,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:53:01,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:01,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 58 transitions, 382 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:01,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:01,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:01,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:02,031 INFO L124 PetriNetUnfolderBase]: 974/1437 cut-off events. [2023-11-17 11:53:02,031 INFO L125 PetriNetUnfolderBase]: For 3804/3804 co-relation queries the response was YES. [2023-11-17 11:53:02,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5287 conditions, 1437 events. 974/1437 cut-off events. For 3804/3804 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5332 event pairs, 315 based on Foata normal form. 14/1307 useless extension candidates. Maximal degree in co-relation 5181. Up to 968 conditions per place. [2023-11-17 11:53:02,039 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 76 selfloop transitions, 8 changer transitions 16/100 dead transitions. [2023-11-17 11:53:02,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 100 transitions, 780 flow [2023-11-17 11:53:02,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:53:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:53:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2023-11-17 11:53:02,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48823529411764705 [2023-11-17 11:53:02,040 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 83 transitions. [2023-11-17 11:53:02,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 83 transitions. [2023-11-17 11:53:02,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:02,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 83 transitions. [2023-11-17 11:53:02,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,041 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,041 INFO L175 Difference]: Start difference. First operand has 65 places, 58 transitions, 382 flow. Second operand 5 states and 83 transitions. [2023-11-17 11:53:02,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 100 transitions, 780 flow [2023-11-17 11:53:02,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 100 transitions, 752 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 11:53:02,050 INFO L231 Difference]: Finished difference. Result has 68 places, 62 transitions, 434 flow [2023-11-17 11:53:02,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=434, PETRI_PLACES=68, PETRI_TRANSITIONS=62} [2023-11-17 11:53:02,051 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 36 predicate places. [2023-11-17 11:53:02,052 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 62 transitions, 434 flow [2023-11-17 11:53:02,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:02,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:02,052 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:02,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 11:53:02,052 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 11:53:02,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:02,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1298344257, now seen corresponding path program 5 times [2023-11-17 11:53:02,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:02,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233548801] [2023-11-17 11:53:02,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:02,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:02,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-11-17 11:53:02,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:02,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233548801] [2023-11-17 11:53:02,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233548801] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 11:53:02,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 11:53:02,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 11:53:02,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991030431] [2023-11-17 11:53:02,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 11:53:02,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 11:53:02,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:02,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 11:53:02,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 11:53:02,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:02,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 62 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:02,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:02,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:02,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:02,429 INFO L124 PetriNetUnfolderBase]: 864/1268 cut-off events. [2023-11-17 11:53:02,430 INFO L125 PetriNetUnfolderBase]: For 3724/3724 co-relation queries the response was YES. [2023-11-17 11:53:02,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4726 conditions, 1268 events. 864/1268 cut-off events. For 3724/3724 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4530 event pairs, 259 based on Foata normal form. 24/1156 useless extension candidates. Maximal degree in co-relation 4618. Up to 806 conditions per place. [2023-11-17 11:53:02,436 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 85 selfloop transitions, 9 changer transitions 4/98 dead transitions. [2023-11-17 11:53:02,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 98 transitions, 775 flow [2023-11-17 11:53:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 11:53:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 11:53:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2023-11-17 11:53:02,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4764705882352941 [2023-11-17 11:53:02,437 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 81 transitions. [2023-11-17 11:53:02,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 81 transitions. [2023-11-17 11:53:02,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:02,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 81 transitions. [2023-11-17 11:53:02,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,438 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 34.0) internal successors, (204), 6 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:02,438 INFO L175 Difference]: Start difference. First operand has 68 places, 62 transitions, 434 flow. Second operand 5 states and 81 transitions. [2023-11-17 11:53:02,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 98 transitions, 775 flow [2023-11-17 11:53:02,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 757 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-11-17 11:53:02,447 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 432 flow [2023-11-17 11:53:02,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=432, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2023-11-17 11:53:02,448 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 38 predicate places. [2023-11-17 11:53:02,448 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 432 flow [2023-11-17 11:53:02,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.4) internal successors, (47), 5 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 11:53:02,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:02,448 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:02,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 11:53:02,449 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 11:53:02,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash -712651701, now seen corresponding path program 1 times [2023-11-17 11:53:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:02,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813244619] [2023-11-17 11:53:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:03,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813244619] [2023-11-17 11:53:03,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813244619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:03,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324196660] [2023-11-17 11:53:03,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:03,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:03,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:03,592 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 11:53:03,619 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 11:53:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:03,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:53:03,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:03,791 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 358 treesize of output 342 [2023-11-17 11:53:04,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:04,085 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:04,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:53:04,207 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:04,207 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:53:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:04,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:04,606 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:53:04,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 213 [2023-11-17 11:53:04,639 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:04,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 115 [2023-11-17 11:53:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:07,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324196660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:07,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:07,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 33 [2023-11-17 11:53:07,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240164624] [2023-11-17 11:53:07,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:07,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-17 11:53:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:07,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-17 11:53:07,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1050, Unknown=4, NotChecked=0, Total=1190 [2023-11-17 11:53:07,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:07,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 432 flow. Second operand has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:07,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:07,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:07,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:09,499 INFO L124 PetriNetUnfolderBase]: 1997/2913 cut-off events. [2023-11-17 11:53:09,499 INFO L125 PetriNetUnfolderBase]: For 6868/6868 co-relation queries the response was YES. [2023-11-17 11:53:09,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10408 conditions, 2913 events. 1997/2913 cut-off events. For 6868/6868 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 12800 event pairs, 216 based on Foata normal form. 1/2496 useless extension candidates. Maximal degree in co-relation 10299. Up to 930 conditions per place. [2023-11-17 11:53:09,516 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 154 selfloop transitions, 68 changer transitions 9/231 dead transitions. [2023-11-17 11:53:09,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 231 transitions, 1807 flow [2023-11-17 11:53:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:53:09,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:53:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 236 transitions. [2023-11-17 11:53:09,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38562091503267976 [2023-11-17 11:53:09,517 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 236 transitions. [2023-11-17 11:53:09,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 236 transitions. [2023-11-17 11:53:09,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:09,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 236 transitions. [2023-11-17 11:53:09,518 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 13.11111111111111) internal successors, (236), 18 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 34.0) internal successors, (646), 19 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,519 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 34.0) internal successors, (646), 19 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,519 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 432 flow. Second operand 18 states and 236 transitions. [2023-11-17 11:53:09,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 231 transitions, 1807 flow [2023-11-17 11:53:09,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 231 transitions, 1655 flow, removed 12 selfloop flow, removed 6 redundant places. [2023-11-17 11:53:09,530 INFO L231 Difference]: Finished difference. Result has 89 places, 125 transitions, 1103 flow [2023-11-17 11:53:09,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1103, PETRI_PLACES=89, PETRI_TRANSITIONS=125} [2023-11-17 11:53:09,530 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 57 predicate places. [2023-11-17 11:53:09,530 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 125 transitions, 1103 flow [2023-11-17 11:53:09,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.057142857142857) internal successors, (212), 35 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:09,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:09,531 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:09,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 11:53:09,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:09,736 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 11:53:09,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash 233619129, now seen corresponding path program 2 times [2023-11-17 11:53:09,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:09,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59411549] [2023-11-17 11:53:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:09,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:10,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:10,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59411549] [2023-11-17 11:53:10,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59411549] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:10,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138862613] [2023-11-17 11:53:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:10,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:10,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:10,479 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 11:53:10,507 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 11:53:10,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:10,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:10,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:53:10,650 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:10,947 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:10,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-17 11:53:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:11,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:11,415 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-17 11:53:11,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-17 11:53:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:11,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138862613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:11,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:11,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 28 [2023-11-17 11:53:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247100213] [2023-11-17 11:53:11,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:11,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:53:11,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:11,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:53:11,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:53:11,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:11,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 125 transitions, 1103 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:11,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:11,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:11,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:13,717 INFO L124 PetriNetUnfolderBase]: 3452/5029 cut-off events. [2023-11-17 11:53:13,717 INFO L125 PetriNetUnfolderBase]: For 18055/18055 co-relation queries the response was YES. [2023-11-17 11:53:13,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20599 conditions, 5029 events. 3452/5029 cut-off events. For 18055/18055 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 24585 event pairs, 456 based on Foata normal form. 1/5030 useless extension candidates. Maximal degree in co-relation 20480. Up to 2089 conditions per place. [2023-11-17 11:53:13,752 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 189 selfloop transitions, 135 changer transitions 59/383 dead transitions. [2023-11-17 11:53:13,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 383 transitions, 3426 flow [2023-11-17 11:53:13,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 11:53:13,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 11:53:13,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 337 transitions. [2023-11-17 11:53:13,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39647058823529413 [2023-11-17 11:53:13,754 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 337 transitions. [2023-11-17 11:53:13,754 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 337 transitions. [2023-11-17 11:53:13,754 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:13,754 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 337 transitions. [2023-11-17 11:53:13,755 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 13.48) internal successors, (337), 25 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 11:53:13,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 34.0) internal successors, (884), 26 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:13,756 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 34.0) internal successors, (884), 26 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:13,756 INFO L175 Difference]: Start difference. First operand has 89 places, 125 transitions, 1103 flow. Second operand 25 states and 337 transitions. [2023-11-17 11:53:13,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 383 transitions, 3426 flow [2023-11-17 11:53:13,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 383 transitions, 3361 flow, removed 31 selfloop flow, removed 2 redundant places. [2023-11-17 11:53:13,816 INFO L231 Difference]: Finished difference. Result has 125 places, 211 transitions, 2393 flow [2023-11-17 11:53:13,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=1064, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2393, PETRI_PLACES=125, PETRI_TRANSITIONS=211} [2023-11-17 11:53:13,817 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 93 predicate places. [2023-11-17 11:53:13,817 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 211 transitions, 2393 flow [2023-11-17 11:53:13,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:13,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:13,817 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:13,831 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 11:53:14,023 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,SelfDestructingSolverStorable14 [2023-11-17 11:53:14,023 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 11:53:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1149670433, now seen corresponding path program 3 times [2023-11-17 11:53:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209716] [2023-11-17 11:53:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:14,756 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:14,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:14,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209716] [2023-11-17 11:53:14,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209716] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:14,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904666358] [2023-11-17 11:53:14,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:14,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:14,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:14,757 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 11:53:14,773 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 11:53:14,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:53:14,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:14,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:53:14,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:15,095 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:15,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:53:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:15,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:15,441 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-17 11:53:15,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-17 11:53:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:15,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904666358] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:15,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:15,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 25 [2023-11-17 11:53:15,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783060519] [2023-11-17 11:53:15,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:15,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-17 11:53:15,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:15,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-17 11:53:15,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2023-11-17 11:53:15,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:15,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 211 transitions, 2393 flow. Second operand has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:15,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:15,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:15,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:17,005 INFO L124 PetriNetUnfolderBase]: 2967/4362 cut-off events. [2023-11-17 11:53:17,005 INFO L125 PetriNetUnfolderBase]: For 47836/47836 co-relation queries the response was YES. [2023-11-17 11:53:17,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27247 conditions, 4362 events. 2967/4362 cut-off events. For 47836/47836 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21122 event pairs, 595 based on Foata normal form. 1/4363 useless extension candidates. Maximal degree in co-relation 27114. Up to 2095 conditions per place. [2023-11-17 11:53:17,034 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 183 selfloop transitions, 124 changer transitions 3/310 dead transitions. [2023-11-17 11:53:17,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 310 transitions, 3595 flow [2023-11-17 11:53:17,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 11:53:17,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 11:53:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 241 transitions. [2023-11-17 11:53:17,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37306501547987614 [2023-11-17 11:53:17,035 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 241 transitions. [2023-11-17 11:53:17,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 241 transitions. [2023-11-17 11:53:17,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:17,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 241 transitions. [2023-11-17 11:53:17,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 12.68421052631579) internal successors, (241), 19 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 34.0) internal successors, (680), 20 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,037 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 34.0) internal successors, (680), 20 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,037 INFO L175 Difference]: Start difference. First operand has 125 places, 211 transitions, 2393 flow. Second operand 19 states and 241 transitions. [2023-11-17 11:53:17,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 310 transitions, 3595 flow [2023-11-17 11:53:17,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 310 transitions, 3380 flow, removed 68 selfloop flow, removed 8 redundant places. [2023-11-17 11:53:17,188 INFO L231 Difference]: Finished difference. Result has 133 places, 214 transitions, 2466 flow [2023-11-17 11:53:17,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2178, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2466, PETRI_PLACES=133, PETRI_TRANSITIONS=214} [2023-11-17 11:53:17,189 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 101 predicate places. [2023-11-17 11:53:17,189 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 214 transitions, 2466 flow [2023-11-17 11:53:17,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.538461538461538) internal successors, (170), 26 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:17,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:17,189 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:17,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 11:53:17,398 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 11:53:17,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:17,399 INFO L85 PathProgramCache]: Analyzing trace with hash -941457289, now seen corresponding path program 4 times [2023-11-17 11:53:17,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:17,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041348647] [2023-11-17 11:53:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:17,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:17,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:18,176 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:18,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041348647] [2023-11-17 11:53:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041348647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:18,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92296716] [2023-11-17 11:53:18,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:18,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:18,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:18,187 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 11:53:18,222 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 11:53:18,385 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:18,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:18,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 11:53:18,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:18,579 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:18,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-11-17 11:53:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:18,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:20,979 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-17 11:53:20,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-17 11:53:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:21,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92296716] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:21,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:21,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 31 [2023-11-17 11:53:21,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316389066] [2023-11-17 11:53:21,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:21,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 11:53:21,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:21,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 11:53:21,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=852, Unknown=1, NotChecked=0, Total=992 [2023-11-17 11:53:21,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:21,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 214 transitions, 2466 flow. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 32 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:21,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:21,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:21,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:23,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-11-17 11:53:25,055 INFO L124 PetriNetUnfolderBase]: 2983/4393 cut-off events. [2023-11-17 11:53:25,055 INFO L125 PetriNetUnfolderBase]: For 46917/46917 co-relation queries the response was YES. [2023-11-17 11:53:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27263 conditions, 4393 events. 2983/4393 cut-off events. For 46917/46917 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 21340 event pairs, 557 based on Foata normal form. 1/4380 useless extension candidates. Maximal degree in co-relation 27132. Up to 1971 conditions per place. [2023-11-17 11:53:25,079 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 191 selfloop transitions, 138 changer transitions 3/332 dead transitions. [2023-11-17 11:53:25,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 332 transitions, 3795 flow [2023-11-17 11:53:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:53:25,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:53:25,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 291 transitions. [2023-11-17 11:53:25,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3721227621483376 [2023-11-17 11:53:25,081 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 291 transitions. [2023-11-17 11:53:25,081 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 291 transitions. [2023-11-17 11:53:25,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:25,081 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 291 transitions. [2023-11-17 11:53:25,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.652173913043478) internal successors, (291), 23 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:25,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:25,083 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:25,083 INFO L175 Difference]: Start difference. First operand has 133 places, 214 transitions, 2466 flow. Second operand 23 states and 291 transitions. [2023-11-17 11:53:25,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 332 transitions, 3795 flow [2023-11-17 11:53:25,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 332 transitions, 3583 flow, removed 4 selfloop flow, removed 16 redundant places. [2023-11-17 11:53:25,182 INFO L231 Difference]: Finished difference. Result has 140 places, 216 transitions, 2564 flow [2023-11-17 11:53:25,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2564, PETRI_PLACES=140, PETRI_TRANSITIONS=216} [2023-11-17 11:53:25,183 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 108 predicate places. [2023-11-17 11:53:25,183 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 216 transitions, 2564 flow [2023-11-17 11:53:25,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 32 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:25,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:25,183 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:25,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:25,388 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,SelfDestructingSolverStorable16 [2023-11-17 11:53:25,389 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 11:53:25,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:25,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1745469495, now seen corresponding path program 5 times [2023-11-17 11:53:25,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:25,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925470171] [2023-11-17 11:53:25,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:25,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:25,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:26,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925470171] [2023-11-17 11:53:26,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925470171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:26,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056524370] [2023-11-17 11:53:26,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:53:26,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:26,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:26,170 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 11:53:26,176 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 11:53:26,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:53:26,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:26,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 11:53:26,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:26,933 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:26,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-11-17 11:53:26,974 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:26,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:27,380 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-17 11:53:27,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 212 [2023-11-17 11:53:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:32,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056524370] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:32,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:32,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 31 [2023-11-17 11:53:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123594019] [2023-11-17 11:53:32,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:32,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 11:53:32,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 11:53:32,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2023-11-17 11:53:32,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:32,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 216 transitions, 2564 flow. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 32 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:32,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:32,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:32,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:35,176 INFO L124 PetriNetUnfolderBase]: 4129/6026 cut-off events. [2023-11-17 11:53:35,176 INFO L125 PetriNetUnfolderBase]: For 71110/71110 co-relation queries the response was YES. [2023-11-17 11:53:35,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38546 conditions, 6026 events. 4129/6026 cut-off events. For 71110/71110 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 30496 event pairs, 690 based on Foata normal form. 1/6027 useless extension candidates. Maximal degree in co-relation 38414. Up to 3521 conditions per place. [2023-11-17 11:53:35,222 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 240 selfloop transitions, 180 changer transitions 45/465 dead transitions. [2023-11-17 11:53:35,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 465 transitions, 5643 flow [2023-11-17 11:53:35,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 11:53:35,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 11:53:35,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 364 transitions. [2023-11-17 11:53:35,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2023-11-17 11:53:35,226 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 364 transitions. [2023-11-17 11:53:35,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 364 transitions. [2023-11-17 11:53:35,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:35,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 364 transitions. [2023-11-17 11:53:35,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 13.0) internal successors, (364), 28 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:35,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 34.0) internal successors, (986), 29 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:35,232 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 34.0) internal successors, (986), 29 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:35,232 INFO L175 Difference]: Start difference. First operand has 140 places, 216 transitions, 2564 flow. Second operand 28 states and 364 transitions. [2023-11-17 11:53:35,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 465 transitions, 5643 flow [2023-11-17 11:53:35,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 465 transitions, 5365 flow, removed 1 selfloop flow, removed 20 redundant places. [2023-11-17 11:53:35,432 INFO L231 Difference]: Finished difference. Result has 162 places, 290 transitions, 3858 flow [2023-11-17 11:53:35,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=3858, PETRI_PLACES=162, PETRI_TRANSITIONS=290} [2023-11-17 11:53:35,433 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2023-11-17 11:53:35,433 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 290 transitions, 3858 flow [2023-11-17 11:53:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 32 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:35,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:35,433 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:35,442 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 11:53:35,639 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,SelfDestructingSolverStorable17 [2023-11-17 11:53:35,640 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:35,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1511342573, now seen corresponding path program 6 times [2023-11-17 11:53:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:35,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191549567] [2023-11-17 11:53:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:35,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:36,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191549567] [2023-11-17 11:53:36,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191549567] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:36,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822295988] [2023-11-17 11:53:36,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:53:36,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:36,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:36,477 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 11:53:36,478 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 11:53:36,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:53:36,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:36,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:53:36,681 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:37,019 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:37,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-17 11:53:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:37,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:37,485 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-17 11:53:37,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-17 11:53:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:37,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822295988] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:37,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:37,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 28 [2023-11-17 11:53:37,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402129626] [2023-11-17 11:53:37,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:37,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:53:37,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:37,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:53:37,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:53:37,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:37,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 290 transitions, 3858 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:37,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:37,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:37,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:39,594 INFO L124 PetriNetUnfolderBase]: 3818/5609 cut-off events. [2023-11-17 11:53:39,595 INFO L125 PetriNetUnfolderBase]: For 152842/152842 co-relation queries the response was YES. [2023-11-17 11:53:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42744 conditions, 5609 events. 3818/5609 cut-off events. For 152842/152842 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 28450 event pairs, 734 based on Foata normal form. 1/5610 useless extension candidates. Maximal degree in co-relation 42597. Up to 2194 conditions per place. [2023-11-17 11:53:39,640 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 245 selfloop transitions, 156 changer transitions 1/402 dead transitions. [2023-11-17 11:53:39,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 402 transitions, 5432 flow [2023-11-17 11:53:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 11:53:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 11:53:39,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 268 transitions. [2023-11-17 11:53:39,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3753501400560224 [2023-11-17 11:53:39,642 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 268 transitions. [2023-11-17 11:53:39,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 268 transitions. [2023-11-17 11:53:39,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:39,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 268 transitions. [2023-11-17 11:53:39,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 12.761904761904763) internal successors, (268), 21 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:39,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:39,643 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:39,644 INFO L175 Difference]: Start difference. First operand has 162 places, 290 transitions, 3858 flow. Second operand 21 states and 268 transitions. [2023-11-17 11:53:39,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 402 transitions, 5432 flow [2023-11-17 11:53:40,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 402 transitions, 5086 flow, removed 96 selfloop flow, removed 10 redundant places. [2023-11-17 11:53:40,057 INFO L231 Difference]: Finished difference. Result has 174 places, 298 transitions, 3998 flow [2023-11-17 11:53:40,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3998, PETRI_PLACES=174, PETRI_TRANSITIONS=298} [2023-11-17 11:53:40,058 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 142 predicate places. [2023-11-17 11:53:40,058 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 298 transitions, 3998 flow [2023-11-17 11:53:40,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:40,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:40,058 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:40,070 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 11:53:40,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:40,264 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:40,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:40,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1571694669, now seen corresponding path program 7 times [2023-11-17 11:53:40,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:40,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157952399] [2023-11-17 11:53:40,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:40,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:41,051 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:41,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:41,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157952399] [2023-11-17 11:53:41,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157952399] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:41,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817785803] [2023-11-17 11:53:41,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:53:41,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:41,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:41,052 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 11:53:41,089 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 11:53:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:41,262 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:53:41,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:41,543 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:41,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:53:41,576 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:41,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:41,901 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-17 11:53:41,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-17 11:53:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:41,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817785803] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:41,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:41,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 26 [2023-11-17 11:53:41,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077629847] [2023-11-17 11:53:41,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:41,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:53:41,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:41,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:53:41,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:53:41,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:41,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 298 transitions, 3998 flow. Second operand has 27 states, 27 states have (on average 6.481481481481482) internal successors, (175), 27 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:41,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:41,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:41,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:44,447 INFO L124 PetriNetUnfolderBase]: 4223/6235 cut-off events. [2023-11-17 11:53:44,447 INFO L125 PetriNetUnfolderBase]: For 182612/182612 co-relation queries the response was YES. [2023-11-17 11:53:44,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48479 conditions, 6235 events. 4223/6235 cut-off events. For 182612/182612 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 32618 event pairs, 583 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 48330. Up to 2141 conditions per place. [2023-11-17 11:53:44,503 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 278 selfloop transitions, 204 changer transitions 4/486 dead transitions. [2023-11-17 11:53:44,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 486 transitions, 6521 flow [2023-11-17 11:53:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 11:53:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 11:53:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 382 transitions. [2023-11-17 11:53:44,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37450980392156863 [2023-11-17 11:53:44,505 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 382 transitions. [2023-11-17 11:53:44,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 382 transitions. [2023-11-17 11:53:44,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:44,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 382 transitions. [2023-11-17 11:53:44,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 12.733333333333333) internal successors, (382), 30 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:44,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 34.0) internal successors, (1054), 31 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:44,507 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 34.0) internal successors, (1054), 31 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:44,507 INFO L175 Difference]: Start difference. First operand has 174 places, 298 transitions, 3998 flow. Second operand 30 states and 382 transitions. [2023-11-17 11:53:44,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 486 transitions, 6521 flow [2023-11-17 11:53:44,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 486 transitions, 6126 flow, removed 56 selfloop flow, removed 17 redundant places. [2023-11-17 11:53:45,002 INFO L231 Difference]: Finished difference. Result has 194 places, 329 transitions, 4603 flow [2023-11-17 11:53:45,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3656, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=4603, PETRI_PLACES=194, PETRI_TRANSITIONS=329} [2023-11-17 11:53:45,003 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 162 predicate places. [2023-11-17 11:53:45,003 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 329 transitions, 4603 flow [2023-11-17 11:53:45,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.481481481481482) internal successors, (175), 27 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:45,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:45,003 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:45,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:45,209 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,SelfDestructingSolverStorable19 [2023-11-17 11:53:45,210 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:45,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:45,210 INFO L85 PathProgramCache]: Analyzing trace with hash 936332563, now seen corresponding path program 8 times [2023-11-17 11:53:45,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:45,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502848606] [2023-11-17 11:53:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:45,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:45,979 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:45,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:45,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502848606] [2023-11-17 11:53:45,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502848606] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:45,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260826909] [2023-11-17 11:53:45,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:53:45,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:45,991 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 11:53:46,016 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 11:53:46,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:53:46,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:46,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:53:46,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:46,561 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:46,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-17 11:53:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:46,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:46,958 INFO L349 Elim1Store]: treesize reduction 32, result has 73.6 percent of original size [2023-11-17 11:53:46,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 102 [2023-11-17 11:53:47,065 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260826909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:47,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 28 [2023-11-17 11:53:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488599949] [2023-11-17 11:53:47,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:47,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-17 11:53:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:47,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-17 11:53:47,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-11-17 11:53:47,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:47,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 329 transitions, 4603 flow. Second operand has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:47,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:47,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:47,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:49,020 INFO L124 PetriNetUnfolderBase]: 4243/6271 cut-off events. [2023-11-17 11:53:49,020 INFO L125 PetriNetUnfolderBase]: For 176592/176592 co-relation queries the response was YES. [2023-11-17 11:53:49,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51288 conditions, 6271 events. 4243/6271 cut-off events. For 176592/176592 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 32888 event pairs, 871 based on Foata normal form. 2/6273 useless extension candidates. Maximal degree in co-relation 51133. Up to 2584 conditions per place. [2023-11-17 11:53:49,074 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 273 selfloop transitions, 154 changer transitions 2/429 dead transitions. [2023-11-17 11:53:49,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 429 transitions, 6232 flow [2023-11-17 11:53:49,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:53:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:53:49,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 253 transitions. [2023-11-17 11:53:49,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3720588235294118 [2023-11-17 11:53:49,075 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 253 transitions. [2023-11-17 11:53:49,075 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 253 transitions. [2023-11-17 11:53:49,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:49,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 253 transitions. [2023-11-17 11:53:49,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.65) internal successors, (253), 20 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:49,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:49,077 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:49,077 INFO L175 Difference]: Start difference. First operand has 194 places, 329 transitions, 4603 flow. Second operand 20 states and 253 transitions. [2023-11-17 11:53:49,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 429 transitions, 6232 flow [2023-11-17 11:53:49,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 429 transitions, 5971 flow, removed 55 selfloop flow, removed 17 redundant places. [2023-11-17 11:53:49,585 INFO L231 Difference]: Finished difference. Result has 198 places, 334 transitions, 4758 flow [2023-11-17 11:53:49,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4346, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4758, PETRI_PLACES=198, PETRI_TRANSITIONS=334} [2023-11-17 11:53:49,585 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 166 predicate places. [2023-11-17 11:53:49,585 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 334 transitions, 4758 flow [2023-11-17 11:53:49,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.413793103448276) internal successors, (186), 29 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:49,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:49,586 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:49,594 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 11:53:49,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:49,792 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:49,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:49,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1215886365, now seen corresponding path program 9 times [2023-11-17 11:53:49,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:49,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171690408] [2023-11-17 11:53:49,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:49,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:50,668 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:50,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:50,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171690408] [2023-11-17 11:53:50,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171690408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:50,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171046831] [2023-11-17 11:53:50,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:53:50,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:50,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:50,670 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 11:53:50,672 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 11:53:50,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 11:53:50,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:50,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 11:53:50,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:51,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:51,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:53:51,188 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:53:51,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2023-11-17 11:53:51,406 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:51,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-17 11:53:51,470 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:51,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:53:51,877 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:53:51,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 213 [2023-11-17 11:53:51,907 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:53:51,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 115 [2023-11-17 11:53:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:55,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171046831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:53:55,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:53:55,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 39 [2023-11-17 11:53:55,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276011665] [2023-11-17 11:53:55,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:53:55,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-17 11:53:55,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:53:55,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-17 11:53:55,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1472, Unknown=3, NotChecked=0, Total=1640 [2023-11-17 11:53:55,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:53:55,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 334 transitions, 4758 flow. Second operand has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:55,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:53:55,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:53:55,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:53:57,936 INFO L124 PetriNetUnfolderBase]: 4353/6456 cut-off events. [2023-11-17 11:53:57,937 INFO L125 PetriNetUnfolderBase]: For 186238/186238 co-relation queries the response was YES. [2023-11-17 11:53:57,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53750 conditions, 6456 events. 4353/6456 cut-off events. For 186238/186238 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 34330 event pairs, 833 based on Foata normal form. 2/6458 useless extension candidates. Maximal degree in co-relation 53594. Up to 3193 conditions per place. [2023-11-17 11:53:57,999 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 257 selfloop transitions, 195 changer transitions 2/454 dead transitions. [2023-11-17 11:53:57,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 454 transitions, 6743 flow [2023-11-17 11:53:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:53:57,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:53:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 246 transitions. [2023-11-17 11:53:58,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36176470588235293 [2023-11-17 11:53:58,000 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 246 transitions. [2023-11-17 11:53:58,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 246 transitions. [2023-11-17 11:53:58,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:53:58,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 246 transitions. [2023-11-17 11:53:58,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 12.3) internal successors, (246), 20 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 11:53:58,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:58,002 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:58,002 INFO L175 Difference]: Start difference. First operand has 198 places, 334 transitions, 4758 flow. Second operand 20 states and 246 transitions. [2023-11-17 11:53:58,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 454 transitions, 6743 flow [2023-11-17 11:53:58,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 454 transitions, 6485 flow, removed 19 selfloop flow, removed 15 redundant places. [2023-11-17 11:53:58,452 INFO L231 Difference]: Finished difference. Result has 207 places, 349 transitions, 5192 flow [2023-11-17 11:53:58,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4508, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=5192, PETRI_PLACES=207, PETRI_TRANSITIONS=349} [2023-11-17 11:53:58,453 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 175 predicate places. [2023-11-17 11:53:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 349 transitions, 5192 flow [2023-11-17 11:53:58,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.048780487804878) internal successors, (248), 41 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:53:58,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:53:58,453 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:53:58,461 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-17 11:53:58,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:58,659 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:53:58,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:53:58,659 INFO L85 PathProgramCache]: Analyzing trace with hash -994199347, now seen corresponding path program 10 times [2023-11-17 11:53:58,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:53:58,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224545073] [2023-11-17 11:53:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:53:58,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:53:58,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:53:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:53:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:53:59,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224545073] [2023-11-17 11:53:59,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224545073] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:53:59,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009555981] [2023-11-17 11:53:59,596 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:53:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:53:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:53:59,597 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:53:59,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 11:53:59,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:53:59,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:53:59,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-17 11:53:59,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:53:59,857 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 312 treesize of output 296 [2023-11-17 11:54:00,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:00,090 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:54:00,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:54:00,215 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:00,215 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-11-17 11:54:00,287 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:00,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:02,648 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:54:02,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 213 [2023-11-17 11:54:02,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:02,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 115 [2023-11-17 11:54:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:04,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009555981] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:04,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:04,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 11] total 37 [2023-11-17 11:54:04,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716706297] [2023-11-17 11:54:04,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:04,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-17 11:54:04,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-17 11:54:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1316, Unknown=5, NotChecked=0, Total=1482 [2023-11-17 11:54:04,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:04,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 349 transitions, 5192 flow. Second operand has 39 states, 39 states have (on average 6.102564102564102) internal successors, (238), 39 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:04,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:04,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:07,570 INFO L124 PetriNetUnfolderBase]: 4441/6585 cut-off events. [2023-11-17 11:54:07,571 INFO L125 PetriNetUnfolderBase]: For 202728/202728 co-relation queries the response was YES. [2023-11-17 11:54:07,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57379 conditions, 6585 events. 4441/6585 cut-off events. For 202728/202728 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35086 event pairs, 866 based on Foata normal form. 1/6586 useless extension candidates. Maximal degree in co-relation 57217. Up to 3229 conditions per place. [2023-11-17 11:54:07,626 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 267 selfloop transitions, 211 changer transitions 1/479 dead transitions. [2023-11-17 11:54:07,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 479 transitions, 7282 flow [2023-11-17 11:54:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 11:54:07,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 11:54:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 293 transitions. [2023-11-17 11:54:07,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3590686274509804 [2023-11-17 11:54:07,627 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 293 transitions. [2023-11-17 11:54:07,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 293 transitions. [2023-11-17 11:54:07,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:07,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 293 transitions. [2023-11-17 11:54:07,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 12.208333333333334) internal successors, (293), 24 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 11:54:07,629 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 34.0) internal successors, (850), 25 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:07,629 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 34.0) internal successors, (850), 25 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:07,629 INFO L175 Difference]: Start difference. First operand has 207 places, 349 transitions, 5192 flow. Second operand 24 states and 293 transitions. [2023-11-17 11:54:07,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 479 transitions, 7282 flow [2023-11-17 11:54:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 479 transitions, 7088 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-17 11:54:08,119 INFO L231 Difference]: Finished difference. Result has 220 places, 357 transitions, 5565 flow [2023-11-17 11:54:08,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5000, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=5565, PETRI_PLACES=220, PETRI_TRANSITIONS=357} [2023-11-17 11:54:08,119 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 188 predicate places. [2023-11-17 11:54:08,119 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 357 transitions, 5565 flow [2023-11-17 11:54:08,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.102564102564102) internal successors, (238), 39 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:08,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:08,120 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:08,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:08,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 11:54:08,325 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:08,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1122601979, now seen corresponding path program 11 times [2023-11-17 11:54:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:08,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661837671] [2023-11-17 11:54:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:08,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:08,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:09,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:09,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661837671] [2023-11-17 11:54:09,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661837671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:09,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582886230] [2023-11-17 11:54:09,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:54:09,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:09,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:09,155 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:09,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 11:54:09,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:54:09,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:09,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-17 11:54:09,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:09,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:09,852 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:54:09,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:54:09,923 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:09,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:54:09,990 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:09,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:10,351 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:54:10,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 213 [2023-11-17 11:54:10,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:10,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 115 [2023-11-17 11:54:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582886230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:12,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:12,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 36 [2023-11-17 11:54:12,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3665648] [2023-11-17 11:54:12,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:12,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 11:54:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:12,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 11:54:12,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1248, Unknown=4, NotChecked=0, Total=1406 [2023-11-17 11:54:12,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:12,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 357 transitions, 5565 flow. Second operand has 38 states, 38 states have (on average 6.105263157894737) internal successors, (232), 38 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:12,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:12,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:12,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:15,573 INFO L124 PetriNetUnfolderBase]: 4545/6745 cut-off events. [2023-11-17 11:54:15,574 INFO L125 PetriNetUnfolderBase]: For 216289/216289 co-relation queries the response was YES. [2023-11-17 11:54:15,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60172 conditions, 6745 events. 4545/6745 cut-off events. For 216289/216289 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 36059 event pairs, 1020 based on Foata normal form. 1/6746 useless extension candidates. Maximal degree in co-relation 60008. Up to 3574 conditions per place. [2023-11-17 11:54:15,648 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 273 selfloop transitions, 202 changer transitions 1/476 dead transitions. [2023-11-17 11:54:15,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 476 transitions, 7535 flow [2023-11-17 11:54:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:54:15,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:54:15,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 278 transitions. [2023-11-17 11:54:15,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3554987212276215 [2023-11-17 11:54:15,651 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 278 transitions. [2023-11-17 11:54:15,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 278 transitions. [2023-11-17 11:54:15,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:15,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 278 transitions. [2023-11-17 11:54:15,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.08695652173913) internal successors, (278), 23 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:15,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:15,652 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:15,653 INFO L175 Difference]: Start difference. First operand has 220 places, 357 transitions, 5565 flow. Second operand 23 states and 278 transitions. [2023-11-17 11:54:15,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 476 transitions, 7535 flow [2023-11-17 11:54:16,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 476 transitions, 7249 flow, removed 20 selfloop flow, removed 18 redundant places. [2023-11-17 11:54:16,222 INFO L231 Difference]: Finished difference. Result has 228 places, 371 transitions, 5962 flow [2023-11-17 11:54:16,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5283, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5962, PETRI_PLACES=228, PETRI_TRANSITIONS=371} [2023-11-17 11:54:16,223 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 196 predicate places. [2023-11-17 11:54:16,223 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 371 transitions, 5962 flow [2023-11-17 11:54:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.105263157894737) internal successors, (232), 38 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:16,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:16,223 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:16,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-17 11:54:16,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:16,430 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:16,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:16,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1023568781, now seen corresponding path program 12 times [2023-11-17 11:54:16,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:16,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574547198] [2023-11-17 11:54:16,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:16,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:16,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:17,304 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:17,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574547198] [2023-11-17 11:54:17,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574547198] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:17,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501083356] [2023-11-17 11:54:17,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:54:17,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:17,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:17,307 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:17,311 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 11:54:17,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:54:17,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:17,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:54:17,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:17,787 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 11:54:18,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:18,066 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:54:18,066 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:54:18,315 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:18,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:54:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:18,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:18,776 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:54:18,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 213 [2023-11-17 11:54:18,803 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:18,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 115 [2023-11-17 11:54:19,947 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:19,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501083356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:19,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:19,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 35 [2023-11-17 11:54:19,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256104742] [2023-11-17 11:54:19,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:19,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-17 11:54:19,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:19,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-17 11:54:19,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1178, Unknown=3, NotChecked=0, Total=1332 [2023-11-17 11:54:19,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:19,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 371 transitions, 5962 flow. Second operand has 37 states, 37 states have (on average 6.108108108108108) internal successors, (226), 37 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:19,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:19,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:19,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:22,446 INFO L124 PetriNetUnfolderBase]: 4605/6834 cut-off events. [2023-11-17 11:54:22,446 INFO L125 PetriNetUnfolderBase]: For 226081/226081 co-relation queries the response was YES. [2023-11-17 11:54:22,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62621 conditions, 6834 events. 4605/6834 cut-off events. For 226081/226081 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 36636 event pairs, 1073 based on Foata normal form. 1/6835 useless extension candidates. Maximal degree in co-relation 62454. Up to 3689 conditions per place. [2023-11-17 11:54:22,519 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 273 selfloop transitions, 185 changer transitions 1/459 dead transitions. [2023-11-17 11:54:22,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 459 transitions, 7613 flow [2023-11-17 11:54:22,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 11:54:22,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 11:54:22,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 220 transitions. [2023-11-17 11:54:22,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35947712418300654 [2023-11-17 11:54:22,520 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 220 transitions. [2023-11-17 11:54:22,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 220 transitions. [2023-11-17 11:54:22,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:22,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 220 transitions. [2023-11-17 11:54:22,521 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 12.222222222222221) internal successors, (220), 18 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:22,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 34.0) internal successors, (646), 19 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:22,522 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 34.0) internal successors, (646), 19 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:22,522 INFO L175 Difference]: Start difference. First operand has 228 places, 371 transitions, 5962 flow. Second operand 18 states and 220 transitions. [2023-11-17 11:54:22,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 459 transitions, 7613 flow [2023-11-17 11:54:23,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 459 transitions, 7331 flow, removed 16 selfloop flow, removed 16 redundant places. [2023-11-17 11:54:23,133 INFO L231 Difference]: Finished difference. Result has 231 places, 375 transitions, 6154 flow [2023-11-17 11:54:23,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5681, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=6154, PETRI_PLACES=231, PETRI_TRANSITIONS=375} [2023-11-17 11:54:23,134 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 199 predicate places. [2023-11-17 11:54:23,134 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 375 transitions, 6154 flow [2023-11-17 11:54:23,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.108108108108108) internal successors, (226), 37 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:23,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:23,134 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:23,144 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:23,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:23,341 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:23,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:23,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2033168351, now seen corresponding path program 13 times [2023-11-17 11:54:23,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:23,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353749255] [2023-11-17 11:54:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:23,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:24,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353749255] [2023-11-17 11:54:24,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353749255] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565471066] [2023-11-17 11:54:24,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:54:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:24,210 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:24,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 11:54:24,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:24,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-17 11:54:24,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:24,441 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 462 treesize of output 446 [2023-11-17 11:54:24,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:24,674 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-17 11:54:24,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 20 [2023-11-17 11:54:24,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:24,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:54:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:24,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:25,231 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:54:25,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 213 [2023-11-17 11:54:25,265 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:25,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 107 treesize of output 115 [2023-11-17 11:54:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:26,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565471066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:26,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:26,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 11] total 36 [2023-11-17 11:54:26,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598796496] [2023-11-17 11:54:26,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:26,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-17 11:54:26,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:26,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-17 11:54:26,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=1251, Unknown=4, NotChecked=0, Total=1406 [2023-11-17 11:54:26,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:26,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 375 transitions, 6154 flow. Second operand has 38 states, 38 states have (on average 6.026315789473684) internal successors, (229), 38 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:26,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:26,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:26,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:29,724 INFO L124 PetriNetUnfolderBase]: 4809/7133 cut-off events. [2023-11-17 11:54:29,725 INFO L125 PetriNetUnfolderBase]: For 246450/246450 co-relation queries the response was YES. [2023-11-17 11:54:29,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66605 conditions, 7133 events. 4809/7133 cut-off events. For 246450/246450 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 38580 event pairs, 686 based on Foata normal form. 1/7134 useless extension candidates. Maximal degree in co-relation 66436. Up to 2428 conditions per place. [2023-11-17 11:54:29,803 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 261 selfloop transitions, 240 changer transitions 8/509 dead transitions. [2023-11-17 11:54:29,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 509 transitions, 8563 flow [2023-11-17 11:54:29,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 11:54:29,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 11:54:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 302 transitions. [2023-11-17 11:54:29,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3700980392156863 [2023-11-17 11:54:29,805 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 302 transitions. [2023-11-17 11:54:29,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 302 transitions. [2023-11-17 11:54:29,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:29,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 302 transitions. [2023-11-17 11:54:29,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 12.583333333333334) internal successors, (302), 24 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:29,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 34.0) internal successors, (850), 25 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:29,806 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 34.0) internal successors, (850), 25 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:29,806 INFO L175 Difference]: Start difference. First operand has 231 places, 375 transitions, 6154 flow. Second operand 24 states and 302 transitions. [2023-11-17 11:54:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 509 transitions, 8563 flow [2023-11-17 11:54:30,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 509 transitions, 8326 flow, removed 14 selfloop flow, removed 12 redundant places. [2023-11-17 11:54:30,498 INFO L231 Difference]: Finished difference. Result has 247 places, 385 transitions, 6749 flow [2023-11-17 11:54:30,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5926, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=6749, PETRI_PLACES=247, PETRI_TRANSITIONS=385} [2023-11-17 11:54:30,499 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 215 predicate places. [2023-11-17 11:54:30,499 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 385 transitions, 6749 flow [2023-11-17 11:54:30,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.026315789473684) internal successors, (229), 38 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:30,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:30,499 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:30,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:30,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:30,707 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:30,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:30,707 INFO L85 PathProgramCache]: Analyzing trace with hash -907634993, now seen corresponding path program 14 times [2023-11-17 11:54:30,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:30,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603122308] [2023-11-17 11:54:30,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:30,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:30,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:31,607 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:31,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:31,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603122308] [2023-11-17 11:54:31,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603122308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:31,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511558747] [2023-11-17 11:54:31,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:54:31,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:31,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:31,608 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:31,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-17 11:54:31,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:54:31,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:31,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-17 11:54:31,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:32,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:32,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:32,375 INFO L349 Elim1Store]: treesize reduction 64, result has 29.7 percent of original size [2023-11-17 11:54:32,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 54 treesize of output 70 [2023-11-17 11:54:32,432 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 23 treesize of output 19 [2023-11-17 11:54:32,437 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 11 treesize of output 9 [2023-11-17 11:54:32,440 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 23 treesize of output 19 [2023-11-17 11:54:32,567 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:32,567 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 26 [2023-11-17 11:54:32,624 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:32,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:32,973 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:54:32,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 161 [2023-11-17 11:54:32,989 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:32,990 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2023-11-17 11:54:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:33,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511558747] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:33,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:33,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 12] total 41 [2023-11-17 11:54:33,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007658470] [2023-11-17 11:54:33,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:33,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 11:54:33,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 11:54:33,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1632, Unknown=1, NotChecked=0, Total=1806 [2023-11-17 11:54:33,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:33,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 385 transitions, 6749 flow. Second operand has 43 states, 43 states have (on average 5.953488372093023) internal successors, (256), 43 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 11:54:33,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:33,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:33,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:37,471 INFO L124 PetriNetUnfolderBase]: 5093/7575 cut-off events. [2023-11-17 11:54:37,471 INFO L125 PetriNetUnfolderBase]: For 304366/304366 co-relation queries the response was YES. [2023-11-17 11:54:37,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74248 conditions, 7575 events. 5093/7575 cut-off events. For 304366/304366 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 41568 event pairs, 911 based on Foata normal form. 2/7577 useless extension candidates. Maximal degree in co-relation 74075. Up to 3461 conditions per place. [2023-11-17 11:54:37,557 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 359 selfloop transitions, 208 changer transitions 3/570 dead transitions. [2023-11-17 11:54:37,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 570 transitions, 9875 flow [2023-11-17 11:54:37,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 11:54:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 11:54:37,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 372 transitions. [2023-11-17 11:54:37,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3772819472616633 [2023-11-17 11:54:37,559 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 372 transitions. [2023-11-17 11:54:37,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 372 transitions. [2023-11-17 11:54:37,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:37,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 372 transitions. [2023-11-17 11:54:37,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 12.827586206896552) internal successors, (372), 29 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 34.0) internal successors, (1020), 30 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,561 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 34.0) internal successors, (1020), 30 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:37,561 INFO L175 Difference]: Start difference. First operand has 247 places, 385 transitions, 6749 flow. Second operand 29 states and 372 transitions. [2023-11-17 11:54:37,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 570 transitions, 9875 flow [2023-11-17 11:54:38,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 570 transitions, 9476 flow, removed 55 selfloop flow, removed 18 redundant places. [2023-11-17 11:54:38,559 INFO L231 Difference]: Finished difference. Result has 263 places, 418 transitions, 7556 flow [2023-11-17 11:54:38,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6381, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7556, PETRI_PLACES=263, PETRI_TRANSITIONS=418} [2023-11-17 11:54:38,560 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 231 predicate places. [2023-11-17 11:54:38,560 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 418 transitions, 7556 flow [2023-11-17 11:54:38,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.953488372093023) internal successors, (256), 43 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 11:54:38,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:38,561 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:38,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-17 11:54:38,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 11:54:38,766 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:38,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:38,767 INFO L85 PathProgramCache]: Analyzing trace with hash -618229467, now seen corresponding path program 15 times [2023-11-17 11:54:38,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:38,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701244264] [2023-11-17 11:54:38,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:38,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:39,742 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:39,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701244264] [2023-11-17 11:54:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701244264] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037618547] [2023-11-17 11:54:39,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:54:39,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:39,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:39,743 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:39,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-17 11:54:39,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:54:39,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:39,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 45 conjunts are in the unsatisfiable core [2023-11-17 11:54:39,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:40,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:40,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:40,522 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2023-11-17 11:54:40,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 35 treesize of output 38 [2023-11-17 11:54:40,531 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 23 treesize of output 19 [2023-11-17 11:54:40,650 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:40,652 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 28 treesize of output 20 [2023-11-17 11:54:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:40,818 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:41,264 INFO L349 Elim1Store]: treesize reduction 19, result has 84.3 percent of original size [2023-11-17 11:54:41,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 100 treesize of output 161 [2023-11-17 11:54:41,278 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:41,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2023-11-17 11:54:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:41,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037618547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:41,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:41,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 41 [2023-11-17 11:54:41,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753683462] [2023-11-17 11:54:41,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:41,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 11:54:41,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:41,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 11:54:41,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1610, Unknown=3, NotChecked=0, Total=1806 [2023-11-17 11:54:41,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:41,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 418 transitions, 7556 flow. Second operand has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:41,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:41,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:41,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:54:47,385 INFO L124 PetriNetUnfolderBase]: 6968/10368 cut-off events. [2023-11-17 11:54:47,385 INFO L125 PetriNetUnfolderBase]: For 425204/425204 co-relation queries the response was YES. [2023-11-17 11:54:47,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102251 conditions, 10368 events. 6968/10368 cut-off events. For 425204/425204 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 59847 event pairs, 1136 based on Foata normal form. 7/10375 useless extension candidates. Maximal degree in co-relation 102075. Up to 3700 conditions per place. [2023-11-17 11:54:47,492 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 549 selfloop transitions, 228 changer transitions 36/813 dead transitions. [2023-11-17 11:54:47,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 813 transitions, 14254 flow [2023-11-17 11:54:47,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-17 11:54:47,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-11-17 11:54:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 495 transitions. [2023-11-17 11:54:47,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41596638655462187 [2023-11-17 11:54:47,495 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 495 transitions. [2023-11-17 11:54:47,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 495 transitions. [2023-11-17 11:54:47,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:54:47,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 495 transitions. [2023-11-17 11:54:47,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 14.142857142857142) internal successors, (495), 35 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:47,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 34.0) internal successors, (1224), 36 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:47,498 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 34.0) internal successors, (1224), 36 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:47,498 INFO L175 Difference]: Start difference. First operand has 263 places, 418 transitions, 7556 flow. Second operand 35 states and 495 transitions. [2023-11-17 11:54:47,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 813 transitions, 14254 flow [2023-11-17 11:54:48,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 813 transitions, 13934 flow, removed 80 selfloop flow, removed 11 redundant places. [2023-11-17 11:54:48,883 INFO L231 Difference]: Finished difference. Result has 297 places, 514 transitions, 9539 flow [2023-11-17 11:54:48,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7242, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=9539, PETRI_PLACES=297, PETRI_TRANSITIONS=514} [2023-11-17 11:54:48,884 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 265 predicate places. [2023-11-17 11:54:48,884 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 514 transitions, 9539 flow [2023-11-17 11:54:48,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.023255813953488) internal successors, (259), 43 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:48,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:54:48,884 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:54:48,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-17 11:54:49,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 11:54:49,089 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:54:49,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:54:49,089 INFO L85 PathProgramCache]: Analyzing trace with hash -2074940978, now seen corresponding path program 16 times [2023-11-17 11:54:49,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:54:49,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981013974] [2023-11-17 11:54:49,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:54:49,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:54:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:54:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:50,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:54:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981013974] [2023-11-17 11:54:50,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981013974] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:54:50,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681398131] [2023-11-17 11:54:50,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:54:50,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:54:50,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:54:50,058 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:54:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-17 11:54:50,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:54:50,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:54:50,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-17 11:54:50,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:54:50,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:50,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-17 11:54:50,784 INFO L349 Elim1Store]: treesize reduction 37, result has 19.6 percent of original size [2023-11-17 11:54:50,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 33 treesize of output 36 [2023-11-17 11:54:50,789 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 21 treesize of output 17 [2023-11-17 11:54:50,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:50,837 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 27 treesize of output 19 [2023-11-17 11:54:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:50,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:54:51,351 INFO L349 Elim1Store]: treesize reduction 4, result has 96.7 percent of original size [2023-11-17 11:54:51,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 174 [2023-11-17 11:54:51,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:54:51,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 58 [2023-11-17 11:54:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:54:52,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681398131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:54:52,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:54:52,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 41 [2023-11-17 11:54:52,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112053747] [2023-11-17 11:54:52,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:54:52,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-17 11:54:52,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:54:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-17 11:54:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1616, Unknown=2, NotChecked=0, Total=1806 [2023-11-17 11:54:52,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:54:52,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 514 transitions, 9539 flow. Second operand has 43 states, 43 states have (on average 5.8604651162790695) internal successors, (252), 43 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:54:52,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:54:52,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:54:52,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:01,273 INFO L124 PetriNetUnfolderBase]: 10238/15389 cut-off events. [2023-11-17 11:55:01,273 INFO L125 PetriNetUnfolderBase]: For 692902/692902 co-relation queries the response was YES. [2023-11-17 11:55:01,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157257 conditions, 15389 events. 10238/15389 cut-off events. For 692902/692902 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 96819 event pairs, 1176 based on Foata normal form. 4/15393 useless extension candidates. Maximal degree in co-relation 157069. Up to 4516 conditions per place. [2023-11-17 11:55:01,558 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 668 selfloop transitions, 509 changer transitions 92/1269 dead transitions. [2023-11-17 11:55:01,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1269 transitions, 22704 flow [2023-11-17 11:55:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-11-17 11:55:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-11-17 11:55:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 867 transitions. [2023-11-17 11:55:01,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38636363636363635 [2023-11-17 11:55:01,560 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 867 transitions. [2023-11-17 11:55:01,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 867 transitions. [2023-11-17 11:55:01,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:01,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 867 transitions. [2023-11-17 11:55:01,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 13.136363636363637) internal successors, (867), 66 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 34.0) internal successors, (2278), 67 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,564 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 34.0) internal successors, (2278), 67 states have internal predecessors, (2278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:01,564 INFO L175 Difference]: Start difference. First operand has 297 places, 514 transitions, 9539 flow. Second operand 66 states and 867 transitions. [2023-11-17 11:55:01,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1269 transitions, 22704 flow [2023-11-17 11:55:05,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1269 transitions, 22008 flow, removed 243 selfloop flow, removed 10 redundant places. [2023-11-17 11:55:05,355 INFO L231 Difference]: Finished difference. Result has 383 places, 760 transitions, 15214 flow [2023-11-17 11:55:05,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=9061, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=15214, PETRI_PLACES=383, PETRI_TRANSITIONS=760} [2023-11-17 11:55:05,357 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 351 predicate places. [2023-11-17 11:55:05,358 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 760 transitions, 15214 flow [2023-11-17 11:55:05,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.8604651162790695) internal successors, (252), 43 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:05,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:05,358 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:05,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:05,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 11:55:05,563 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:05,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:05,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1281742001, now seen corresponding path program 17 times [2023-11-17 11:55:05,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:05,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914265291] [2023-11-17 11:55:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:05,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:06,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914265291] [2023-11-17 11:55:06,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914265291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:06,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274668049] [2023-11-17 11:55:06,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:55:06,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:06,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:06,199 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-17 11:55:06,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:55:06,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:06,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 11:55:06,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:06,912 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:06,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-11-17 11:55:06,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:06,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:07,300 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-17 11:55:07,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-17 11:55:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:12,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274668049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:12,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:12,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8] total 31 [2023-11-17 11:55:12,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899043934] [2023-11-17 11:55:12,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:12,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-17 11:55:12,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:12,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-17 11:55:12,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2023-11-17 11:55:12,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:12,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 760 transitions, 15214 flow. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 32 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:12,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:12,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:12,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:18,663 INFO L124 PetriNetUnfolderBase]: 10837/16328 cut-off events. [2023-11-17 11:55:18,663 INFO L125 PetriNetUnfolderBase]: For 1203864/1203864 co-relation queries the response was YES. [2023-11-17 11:55:18,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193496 conditions, 16328 events. 10837/16328 cut-off events. For 1203864/1203864 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 104407 event pairs, 3760 based on Foata normal form. 2/16330 useless extension candidates. Maximal degree in co-relation 193277. Up to 13876 conditions per place. [2023-11-17 11:55:19,106 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 631 selfloop transitions, 309 changer transitions 3/943 dead transitions. [2023-11-17 11:55:19,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 943 transitions, 20186 flow [2023-11-17 11:55:19,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:55:19,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:55:19,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 282 transitions. [2023-11-17 11:55:19,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36061381074168797 [2023-11-17 11:55:19,107 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 282 transitions. [2023-11-17 11:55:19,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 282 transitions. [2023-11-17 11:55:19,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:19,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 282 transitions. [2023-11-17 11:55:19,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.26086956521739) internal successors, (282), 23 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:19,109 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:19,109 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:19,109 INFO L175 Difference]: Start difference. First operand has 383 places, 760 transitions, 15214 flow. Second operand 23 states and 282 transitions. [2023-11-17 11:55:19,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 943 transitions, 20186 flow [2023-11-17 11:55:27,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 943 transitions, 18960 flow, removed 319 selfloop flow, removed 19 redundant places. [2023-11-17 11:55:27,538 INFO L231 Difference]: Finished difference. Result has 390 places, 828 transitions, 16531 flow [2023-11-17 11:55:27,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=14116, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=760, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=16531, PETRI_PLACES=390, PETRI_TRANSITIONS=828} [2023-11-17 11:55:27,539 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 358 predicate places. [2023-11-17 11:55:27,539 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 828 transitions, 16531 flow [2023-11-17 11:55:27,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 32 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:27,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:27,539 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:27,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:27,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:27,750 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:27,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1682198173, now seen corresponding path program 18 times [2023-11-17 11:55:27,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:27,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638581529] [2023-11-17 11:55:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:28,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:28,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638581529] [2023-11-17 11:55:28,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638581529] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:28,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592577056] [2023-11-17 11:55:28,368 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:55:28,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:28,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:28,373 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:28,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-17 11:55:28,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 11:55:28,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:55:28,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:55:28,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:29,120 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:29,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 75 [2023-11-17 11:55:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:29,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:29,542 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-17 11:55:29,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-17 11:55:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:35,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592577056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:55:35,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:55:35,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 27 [2023-11-17 11:55:35,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116193355] [2023-11-17 11:55:35,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:55:35,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:55:35,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:55:35,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:55:35,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2023-11-17 11:55:35,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:55:35,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 828 transitions, 16531 flow. Second operand has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:35,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:55:35,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:55:35,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:55:43,130 INFO L124 PetriNetUnfolderBase]: 11793/17793 cut-off events. [2023-11-17 11:55:43,131 INFO L125 PetriNetUnfolderBase]: For 1321039/1321039 co-relation queries the response was YES. [2023-11-17 11:55:43,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214584 conditions, 17793 events. 11793/17793 cut-off events. For 1321039/1321039 co-relation queries the response was YES. Maximal size of possible extension queue 959. Compared 115552 event pairs, 3808 based on Foata normal form. 2/17795 useless extension candidates. Maximal degree in co-relation 214363. Up to 14640 conditions per place. [2023-11-17 11:55:43,611 INFO L140 encePairwiseOnDemand]: 20/34 looper letters, 663 selfloop transitions, 344 changer transitions 2/1009 dead transitions. [2023-11-17 11:55:43,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1009 transitions, 21622 flow [2023-11-17 11:55:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 11:55:43,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 11:55:43,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 286 transitions. [2023-11-17 11:55:43,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3657289002557545 [2023-11-17 11:55:43,613 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 286 transitions. [2023-11-17 11:55:43,613 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 286 transitions. [2023-11-17 11:55:43,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:55:43,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 286 transitions. [2023-11-17 11:55:43,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 12.434782608695652) internal successors, (286), 23 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:43,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:43,616 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:43,616 INFO L175 Difference]: Start difference. First operand has 390 places, 828 transitions, 16531 flow. Second operand 23 states and 286 transitions. [2023-11-17 11:55:43,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1009 transitions, 21622 flow [2023-11-17 11:55:52,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 1009 transitions, 21077 flow, removed 118 selfloop flow, removed 7 redundant places. [2023-11-17 11:55:52,929 INFO L231 Difference]: Finished difference. Result has 411 places, 888 transitions, 18491 flow [2023-11-17 11:55:52,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=16068, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=828, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=294, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=18491, PETRI_PLACES=411, PETRI_TRANSITIONS=888} [2023-11-17 11:55:52,930 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 379 predicate places. [2023-11-17 11:55:52,930 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 888 transitions, 18491 flow [2023-11-17 11:55:52,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.535714285714286) internal successors, (183), 28 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:55:52,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:55:52,931 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:55:52,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-17 11:55:53,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:53,138 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:55:53,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:55:53,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1184793875, now seen corresponding path program 19 times [2023-11-17 11:55:53,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:55:53,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380737650] [2023-11-17 11:55:53,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:55:53,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:55:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:53,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:55:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380737650] [2023-11-17 11:55:53,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380737650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:55:53,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991696338] [2023-11-17 11:55:53,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:55:53,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:55:53,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:55:53,810 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:55:53,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-17 11:55:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:55:54,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:55:54,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:55:54,300 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:55:54,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:55:54,323 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:55:54,323 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:55:54,663 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-17 11:55:54,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-17 11:56:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:01,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991696338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:01,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:01,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 23 [2023-11-17 11:56:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895576690] [2023-11-17 11:56:01,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:01,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 11:56:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 11:56:01,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-11-17 11:56:01,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:56:01,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 888 transitions, 18491 flow. Second operand has 24 states, 24 states have (on average 6.458333333333333) internal successors, (155), 24 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:01,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:01,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:56:01,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:08,516 INFO L124 PetriNetUnfolderBase]: 11885/17935 cut-off events. [2023-11-17 11:56:08,516 INFO L125 PetriNetUnfolderBase]: For 1364039/1364039 co-relation queries the response was YES. [2023-11-17 11:56:08,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 218807 conditions, 17935 events. 11885/17935 cut-off events. For 1364039/1364039 co-relation queries the response was YES. Maximal size of possible extension queue 987. Compared 116617 event pairs, 3889 based on Foata normal form. 2/17937 useless extension candidates. Maximal degree in co-relation 218582. Up to 15064 conditions per place. [2023-11-17 11:56:08,835 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 618 selfloop transitions, 345 changer transitions 1/964 dead transitions. [2023-11-17 11:56:08,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 964 transitions, 21612 flow [2023-11-17 11:56:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 11:56:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 11:56:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 202 transitions. [2023-11-17 11:56:08,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3494809688581315 [2023-11-17 11:56:08,852 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 202 transitions. [2023-11-17 11:56:08,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 202 transitions. [2023-11-17 11:56:08,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:08,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 202 transitions. [2023-11-17 11:56:08,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:08,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 34.0) internal successors, (612), 18 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:08,853 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 34.0) internal successors, (612), 18 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:08,853 INFO L175 Difference]: Start difference. First operand has 411 places, 888 transitions, 18491 flow. Second operand 17 states and 202 transitions. [2023-11-17 11:56:08,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 964 transitions, 21612 flow [2023-11-17 11:56:19,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 964 transitions, 21097 flow, removed 200 selfloop flow, removed 10 redundant places. [2023-11-17 11:56:19,376 INFO L231 Difference]: Finished difference. Result has 418 places, 895 transitions, 18989 flow [2023-11-17 11:56:19,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=18076, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=18989, PETRI_PLACES=418, PETRI_TRANSITIONS=895} [2023-11-17 11:56:19,377 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 386 predicate places. [2023-11-17 11:56:19,377 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 895 transitions, 18989 flow [2023-11-17 11:56:19,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.458333333333333) internal successors, (155), 24 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:19,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:19,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-17 11:56:19,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-17 11:56:19,582 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:56:19,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1623218513, now seen corresponding path program 20 times [2023-11-17 11:56:19,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:19,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576942410] [2023-11-17 11:56:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:19,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:20,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576942410] [2023-11-17 11:56:20,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576942410] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:20,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778518619] [2023-11-17 11:56:20,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:56:20,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:20,223 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:20,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-17 11:56:20,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:56:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:20,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:56:20,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:20,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:20,708 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:56:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:20,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:21,180 INFO L349 Elim1Store]: treesize reduction 8, result has 96.1 percent of original size [2023-11-17 11:56:21,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 210 [2023-11-17 11:56:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:27,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778518619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:27,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:27,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 27 [2023-11-17 11:56:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189919362] [2023-11-17 11:56:27,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:27,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:56:27,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:27,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:56:27,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-17 11:56:27,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:56:27,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 895 transitions, 18989 flow. Second operand has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:27,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:27,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:56:27,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:34,228 INFO L124 PetriNetUnfolderBase]: 11907/17983 cut-off events. [2023-11-17 11:56:34,228 INFO L125 PetriNetUnfolderBase]: For 1372640/1372640 co-relation queries the response was YES. [2023-11-17 11:56:34,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217616 conditions, 17983 events. 11907/17983 cut-off events. For 1372640/1372640 co-relation queries the response was YES. Maximal size of possible extension queue 991. Compared 117284 event pairs, 4055 based on Foata normal form. 2/17985 useless extension candidates. Maximal degree in co-relation 217390. Up to 15648 conditions per place. [2023-11-17 11:56:34,508 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 649 selfloop transitions, 312 changer transitions 1/962 dead transitions. [2023-11-17 11:56:34,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 962 transitions, 21867 flow [2023-11-17 11:56:34,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 11:56:34,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 11:56:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 186 transitions. [2023-11-17 11:56:34,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34191176470588236 [2023-11-17 11:56:34,510 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 186 transitions. [2023-11-17 11:56:34,510 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 186 transitions. [2023-11-17 11:56:34,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:34,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 186 transitions. [2023-11-17 11:56:34,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 11.625) internal successors, (186), 16 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:34,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 34.0) internal successors, (578), 17 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:34,511 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 34.0) internal successors, (578), 17 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:34,511 INFO L175 Difference]: Start difference. First operand has 418 places, 895 transitions, 18989 flow. Second operand 16 states and 186 transitions. [2023-11-17 11:56:34,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 962 transitions, 21867 flow [2023-11-17 11:56:43,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 962 transitions, 21370 flow, removed 63 selfloop flow, removed 11 redundant places. [2023-11-17 11:56:43,228 INFO L231 Difference]: Finished difference. Result has 424 places, 900 transitions, 19268 flow [2023-11-17 11:56:43,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=18493, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=19268, PETRI_PLACES=424, PETRI_TRANSITIONS=900} [2023-11-17 11:56:43,229 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 392 predicate places. [2023-11-17 11:56:43,229 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 900 transitions, 19268 flow [2023-11-17 11:56:43,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.5) internal successors, (182), 28 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:43,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:56:43,229 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:56:43,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-17 11:56:43,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-17 11:56:43,439 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:56:43,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:56:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash -154632889, now seen corresponding path program 21 times [2023-11-17 11:56:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:56:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004587571] [2023-11-17 11:56:43,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:56:43,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:56:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:56:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:44,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:56:44,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004587571] [2023-11-17 11:56:44,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004587571] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:56:44,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843348820] [2023-11-17 11:56:44,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 11:56:44,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:56:44,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:56:44,042 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:56:44,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-17 11:56:44,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 11:56:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:56:44,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 38 conjunts are in the unsatisfiable core [2023-11-17 11:56:44,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:56:44,554 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:56:44,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:56:44,730 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:44,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:56:45,083 INFO L349 Elim1Store]: treesize reduction 12, result has 94.1 percent of original size [2023-11-17 11:56:45,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 56 treesize of output 208 [2023-11-17 11:56:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:56:48,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843348820] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:56:48,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:56:48,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 26 [2023-11-17 11:56:48,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992815231] [2023-11-17 11:56:48,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:56:48,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:56:48,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:56:48,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:56:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:56:48,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:56:48,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 900 transitions, 19268 flow. Second operand has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:48,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:56:48,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:56:48,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:56:56,347 INFO L124 PetriNetUnfolderBase]: 12163/18369 cut-off events. [2023-11-17 11:56:56,348 INFO L125 PetriNetUnfolderBase]: For 1414978/1414978 co-relation queries the response was YES. [2023-11-17 11:56:56,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223648 conditions, 18369 events. 12163/18369 cut-off events. For 1414978/1414978 co-relation queries the response was YES. Maximal size of possible extension queue 1006. Compared 120077 event pairs, 3819 based on Foata normal form. 4/18373 useless extension candidates. Maximal degree in co-relation 223420. Up to 15160 conditions per place. [2023-11-17 11:56:56,704 INFO L140 encePairwiseOnDemand]: 19/34 looper letters, 640 selfloop transitions, 391 changer transitions 5/1036 dead transitions. [2023-11-17 11:56:56,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1036 transitions, 23261 flow [2023-11-17 11:56:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 11:56:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 11:56:56,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 319 transitions. [2023-11-17 11:56:56,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3474945533769063 [2023-11-17 11:56:56,705 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 319 transitions. [2023-11-17 11:56:56,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 319 transitions. [2023-11-17 11:56:56,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:56:56,706 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 319 transitions. [2023-11-17 11:56:56,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 11.814814814814815) internal successors, (319), 27 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:56,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 34.0) internal successors, (952), 28 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:56,707 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 34.0) internal successors, (952), 28 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:56:56,707 INFO L175 Difference]: Start difference. First operand has 424 places, 900 transitions, 19268 flow. Second operand 27 states and 319 transitions. [2023-11-17 11:56:56,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1036 transitions, 23261 flow [2023-11-17 11:57:05,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1036 transitions, 22886 flow, removed 13 selfloop flow, removed 12 redundant places. [2023-11-17 11:57:05,402 INFO L231 Difference]: Finished difference. Result has 442 places, 925 transitions, 20485 flow [2023-11-17 11:57:05,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=18895, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=900, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=20485, PETRI_PLACES=442, PETRI_TRANSITIONS=925} [2023-11-17 11:57:05,403 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 410 predicate places. [2023-11-17 11:57:05,404 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 925 transitions, 20485 flow [2023-11-17 11:57:05,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:05,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:05,404 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:05,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-17 11:57:05,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:05,610 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-11-17 11:57:05,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1749741421, now seen corresponding path program 22 times [2023-11-17 11:57:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:05,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208334654] [2023-11-17 11:57:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:05,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:57:06,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208334654] [2023-11-17 11:57:06,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208334654] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:06,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567442691] [2023-11-17 11:57:06,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 11:57:06,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:06,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:06,243 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:06,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-17 11:57:06,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 11:57:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:06,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:57:06,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:06,730 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:06,731 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:57:06,760 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:57:06,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:07,173 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2023-11-17 11:57:07,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2023-11-17 11:57:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:57:29,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567442691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:29,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 26 [2023-11-17 11:57:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008207989] [2023-11-17 11:57:29,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:29,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:57:29,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:57:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:57:29,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:57:29,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 925 transitions, 20485 flow. Second operand has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:29,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:29,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:57:29,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:57:37,099 INFO L124 PetriNetUnfolderBase]: 12307/18601 cut-off events. [2023-11-17 11:57:37,099 INFO L125 PetriNetUnfolderBase]: For 1579566/1579566 co-relation queries the response was YES. [2023-11-17 11:57:37,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234550 conditions, 18601 events. 12307/18601 cut-off events. For 1579566/1579566 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 122079 event pairs, 4153 based on Foata normal form. 4/18605 useless extension candidates. Maximal degree in co-relation 234318. Up to 16474 conditions per place. [2023-11-17 11:57:37,574 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 669 selfloop transitions, 326 changer transitions 2/997 dead transitions. [2023-11-17 11:57:37,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 997 transitions, 23521 flow [2023-11-17 11:57:37,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 11:57:37,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 11:57:37,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 197 transitions. [2023-11-17 11:57:37,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3408304498269896 [2023-11-17 11:57:37,584 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 197 transitions. [2023-11-17 11:57:37,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 197 transitions. [2023-11-17 11:57:37,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:57:37,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 197 transitions. [2023-11-17 11:57:37,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 11.588235294117647) internal successors, (197), 17 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:37,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 34.0) internal successors, (612), 18 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:37,585 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 34.0) internal successors, (612), 18 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:37,585 INFO L175 Difference]: Start difference. First operand has 442 places, 925 transitions, 20485 flow. Second operand 17 states and 197 transitions. [2023-11-17 11:57:37,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 997 transitions, 23521 flow [2023-11-17 11:57:49,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 997 transitions, 22854 flow, removed 192 selfloop flow, removed 18 redundant places. [2023-11-17 11:57:49,111 INFO L231 Difference]: Finished difference. Result has 444 places, 938 transitions, 20933 flow [2023-11-17 11:57:49,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=19832, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=925, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=20933, PETRI_PLACES=444, PETRI_TRANSITIONS=938} [2023-11-17 11:57:49,112 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 412 predicate places. [2023-11-17 11:57:49,113 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 938 transitions, 20933 flow [2023-11-17 11:57:49,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:49,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:57:49,113 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:57:49,121 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-17 11:57:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:49,319 INFO L420 AbstractCegarLoop]: === Iteration 36 === 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 11:57:49,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:57:49,320 INFO L85 PathProgramCache]: Analyzing trace with hash 828971091, now seen corresponding path program 23 times [2023-11-17 11:57:49,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:57:49,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755814327] [2023-11-17 11:57:49,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:57:49,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:57:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:57:50,080 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:57:50,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:57:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755814327] [2023-11-17 11:57:50,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755814327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:57:50,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075341495] [2023-11-17 11:57:50,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 11:57:50,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:57:50,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:57:50,081 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:57:50,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-17 11:57:50,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 11:57:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:57:50,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:57:50,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:57:50,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:57:50,830 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 113 treesize of output 129 [2023-11-17 11:57:50,975 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:57:50,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:57:51,280 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-17 11:57:51,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 62 treesize of output 234 [2023-11-17 11:57:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:57:56,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075341495] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:57:56,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:57:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 26 [2023-11-17 11:57:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587215381] [2023-11-17 11:57:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:57:56,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:57:56,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:57:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:57:56,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:57:56,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:57:56,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 938 transitions, 20933 flow. Second operand has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:57:56,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:57:56,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:57:56,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:04,704 INFO L124 PetriNetUnfolderBase]: 12657/19129 cut-off events. [2023-11-17 11:58:04,705 INFO L125 PetriNetUnfolderBase]: For 1650396/1650396 co-relation queries the response was YES. [2023-11-17 11:58:05,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244007 conditions, 19129 events. 12657/19129 cut-off events. For 1650396/1650396 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 125779 event pairs, 4051 based on Foata normal form. 4/19133 useless extension candidates. Maximal degree in co-relation 243772. Up to 16314 conditions per place. [2023-11-17 11:58:05,122 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 672 selfloop transitions, 377 changer transitions 2/1051 dead transitions. [2023-11-17 11:58:05,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 1051 transitions, 24949 flow [2023-11-17 11:58:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 11:58:05,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 11:58:05,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 258 transitions. [2023-11-17 11:58:05,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3449197860962567 [2023-11-17 11:58:05,124 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 258 transitions. [2023-11-17 11:58:05,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 258 transitions. [2023-11-17 11:58:05,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:05,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 258 transitions. [2023-11-17 11:58:05,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.727272727272727) internal successors, (258), 22 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:05,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 34.0) internal successors, (782), 23 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:05,126 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 34.0) internal successors, (782), 23 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:05,126 INFO L175 Difference]: Start difference. First operand has 444 places, 938 transitions, 20933 flow. Second operand 22 states and 258 transitions. [2023-11-17 11:58:05,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 1051 transitions, 24949 flow [2023-11-17 11:58:17,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 1051 transitions, 24581 flow, removed 60 selfloop flow, removed 11 redundant places. [2023-11-17 11:58:17,969 INFO L231 Difference]: Finished difference. Result has 460 places, 970 transitions, 22675 flow [2023-11-17 11:58:17,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=20581, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=22675, PETRI_PLACES=460, PETRI_TRANSITIONS=970} [2023-11-17 11:58:17,970 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 428 predicate places. [2023-11-17 11:58:17,970 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 970 transitions, 22675 flow [2023-11-17 11:58:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:17,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:58:17,971 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:58:17,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-17 11:58:18,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:18,178 INFO L420 AbstractCegarLoop]: === Iteration 37 === 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 11:58:18,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:58:18,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1244593965, now seen corresponding path program 24 times [2023-11-17 11:58:18,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:58:18,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697020596] [2023-11-17 11:58:18,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:58:18,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:58:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:58:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:58:18,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:58:18,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697020596] [2023-11-17 11:58:18,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697020596] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:58:18,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018789022] [2023-11-17 11:58:18,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 11:58:18,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:58:18,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:58:18,828 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:58:18,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-17 11:58:19,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 11:58:19,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:58:19,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:58:19,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:58:19,329 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:58:19,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:58:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:58:19,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:58:19,756 INFO L349 Elim1Store]: treesize reduction 15, result has 95.3 percent of original size [2023-11-17 11:58:19,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 325 [2023-11-17 11:58:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:58:41,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018789022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:58:41,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:58:41,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 26 [2023-11-17 11:58:41,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016730183] [2023-11-17 11:58:41,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:58:41,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 11:58:41,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:58:41,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 11:58:41,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2023-11-17 11:58:41,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:58:41,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 970 transitions, 22675 flow. Second operand has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:41,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:58:41,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:58:41,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:58:50,129 INFO L124 PetriNetUnfolderBase]: 12679/19177 cut-off events. [2023-11-17 11:58:50,129 INFO L125 PetriNetUnfolderBase]: For 1874950/1874950 co-relation queries the response was YES. [2023-11-17 11:58:50,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254351 conditions, 19177 events. 12679/19177 cut-off events. For 1874950/1874950 co-relation queries the response was YES. Maximal size of possible extension queue 1031. Compared 126334 event pairs, 4236 based on Foata normal form. 2/19179 useless extension candidates. Maximal degree in co-relation 254110. Up to 16468 conditions per place. [2023-11-17 11:58:50,965 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 671 selfloop transitions, 364 changer transitions 1/1036 dead transitions. [2023-11-17 11:58:50,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 1036 transitions, 25605 flow [2023-11-17 11:58:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 11:58:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 11:58:50,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 222 transitions. [2023-11-17 11:58:50,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3264705882352941 [2023-11-17 11:58:50,967 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 222 transitions. [2023-11-17 11:58:50,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 222 transitions. [2023-11-17 11:58:50,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:58:50,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 222 transitions. [2023-11-17 11:58:50,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 11.1) internal successors, (222), 20 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:50,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:50,968 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 34.0) internal successors, (714), 21 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:58:50,968 INFO L175 Difference]: Start difference. First operand has 460 places, 970 transitions, 22675 flow. Second operand 20 states and 222 transitions. [2023-11-17 11:58:50,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 1036 transitions, 25605 flow [2023-11-17 11:59:12,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 1036 transitions, 25032 flow, removed 226 selfloop flow, removed 12 redundant places. [2023-11-17 11:59:12,164 INFO L231 Difference]: Finished difference. Result has 468 places, 973 transitions, 22938 flow [2023-11-17 11:59:12,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=22102, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=970, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=22938, PETRI_PLACES=468, PETRI_TRANSITIONS=973} [2023-11-17 11:59:12,165 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 436 predicate places. [2023-11-17 11:59:12,165 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 973 transitions, 22938 flow [2023-11-17 11:59:12,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.518518518518518) internal successors, (176), 27 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:12,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:12,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:12,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-17 11:59:12,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 11:59:12,371 INFO L420 AbstractCegarLoop]: === Iteration 38 === 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 11:59:12,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1531092333, now seen corresponding path program 25 times [2023-11-17 11:59:12,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:12,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998655906] [2023-11-17 11:59:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:12,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:59:13,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:13,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998655906] [2023-11-17 11:59:13,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998655906] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:13,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73581212] [2023-11-17 11:59:13,037 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 11:59:13,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:13,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:13,038 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:13,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-17 11:59:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:13,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 11:59:13,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:13,512 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:13,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:59:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:59:13,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:13,881 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-17 11:59:13,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 236 [2023-11-17 11:59:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:59:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73581212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 11:59:22,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 11:59:22,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 27 [2023-11-17 11:59:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306021231] [2023-11-17 11:59:22,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 11:59:22,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 11:59:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 11:59:22,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 11:59:22,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2023-11-17 11:59:22,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 11:59:22,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 973 transitions, 22938 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:22,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 11:59:22,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 11:59:22,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 11:59:31,235 INFO L124 PetriNetUnfolderBase]: 12951/19583 cut-off events. [2023-11-17 11:59:31,235 INFO L125 PetriNetUnfolderBase]: For 1851309/1851309 co-relation queries the response was YES. [2023-11-17 11:59:31,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257040 conditions, 19583 events. 12951/19583 cut-off events. For 1851309/1851309 co-relation queries the response was YES. Maximal size of possible extension queue 1080. Compared 129305 event pairs, 4114 based on Foata normal form. 2/19585 useless extension candidates. Maximal degree in co-relation 256798. Up to 16188 conditions per place. [2023-11-17 11:59:31,739 INFO L140 encePairwiseOnDemand]: 22/34 looper letters, 647 selfloop transitions, 446 changer transitions 1/1094 dead transitions. [2023-11-17 11:59:31,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1094 transitions, 26747 flow [2023-11-17 11:59:31,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 11:59:31,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 11:59:31,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 254 transitions. [2023-11-17 11:59:31,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.339572192513369 [2023-11-17 11:59:31,740 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 254 transitions. [2023-11-17 11:59:31,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 254 transitions. [2023-11-17 11:59:31,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 11:59:31,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 254 transitions. [2023-11-17 11:59:31,741 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 11.545454545454545) internal successors, (254), 22 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:31,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 34.0) internal successors, (782), 23 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:31,742 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 34.0) internal successors, (782), 23 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:31,742 INFO L175 Difference]: Start difference. First operand has 468 places, 973 transitions, 22938 flow. Second operand 22 states and 254 transitions. [2023-11-17 11:59:31,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1094 transitions, 26747 flow [2023-11-17 11:59:49,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 1094 transitions, 26233 flow, removed 18 selfloop flow, removed 17 redundant places. [2023-11-17 11:59:49,539 INFO L231 Difference]: Finished difference. Result has 477 places, 1012 transitions, 24275 flow [2023-11-17 11:59:49,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=22427, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=973, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=24275, PETRI_PLACES=477, PETRI_TRANSITIONS=1012} [2023-11-17 11:59:49,540 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 445 predicate places. [2023-11-17 11:59:49,540 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1012 transitions, 24275 flow [2023-11-17 11:59:49,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 11:59:49,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 11:59:49,540 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 11:59:49,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-11-17 11:59:49,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 11:59:49,746 INFO L420 AbstractCegarLoop]: === Iteration 39 === 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 11:59:49,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 11:59:49,746 INFO L85 PathProgramCache]: Analyzing trace with hash -202394913, now seen corresponding path program 26 times [2023-11-17 11:59:49,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 11:59:49,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418988803] [2023-11-17 11:59:49,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 11:59:49,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 11:59:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 11:59:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:59:50,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 11:59:50,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418988803] [2023-11-17 11:59:50,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418988803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 11:59:50,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510672654] [2023-11-17 11:59:50,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 11:59:50,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 11:59:50,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 11:59:50,393 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 11:59:50,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-17 11:59:50,703 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 11:59:50,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 11:59:50,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-17 11:59:50,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 11:59:50,906 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 11:59:50,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 11:59:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 11:59:50,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 11:59:51,350 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-17 11:59:51,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 236 [2023-11-17 12:00:04,610 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 12:00:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510672654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:04,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:04,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 27 [2023-11-17 12:00:04,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287242421] [2023-11-17 12:00:04,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:04,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:00:04,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:00:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:00:04,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 12:00:04,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1012 transitions, 24275 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:04,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:04,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 12:00:04,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:00:15,019 INFO L124 PetriNetUnfolderBase]: 12981/19645 cut-off events. [2023-11-17 12:00:15,020 INFO L125 PetriNetUnfolderBase]: For 1876883/1876883 co-relation queries the response was YES. [2023-11-17 12:00:15,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262021 conditions, 19645 events. 12981/19645 cut-off events. For 1876883/1876883 co-relation queries the response was YES. Maximal size of possible extension queue 1086. Compared 129999 event pairs, 4130 based on Foata normal form. 2/19647 useless extension candidates. Maximal degree in co-relation 261774. Up to 16198 conditions per place. [2023-11-17 12:00:15,692 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 648 selfloop transitions, 449 changer transitions 1/1098 dead transitions. [2023-11-17 12:00:15,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 1098 transitions, 27596 flow [2023-11-17 12:00:15,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:00:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:00:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 250 transitions. [2023-11-17 12:00:15,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35014005602240894 [2023-11-17 12:00:15,693 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 250 transitions. [2023-11-17 12:00:15,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 250 transitions. [2023-11-17 12:00:15,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:00:15,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 250 transitions. [2023-11-17 12:00:15,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 11.904761904761905) internal successors, (250), 21 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:15,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:15,700 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 34.0) internal successors, (748), 22 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:15,700 INFO L175 Difference]: Start difference. First operand has 477 places, 1012 transitions, 24275 flow. Second operand 21 states and 250 transitions. [2023-11-17 12:00:15,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 1098 transitions, 27596 flow [2023-11-17 12:00:41,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1098 transitions, 27352 flow, removed 86 selfloop flow, removed 11 redundant places. [2023-11-17 12:00:41,374 INFO L231 Difference]: Finished difference. Result has 488 places, 1017 transitions, 25112 flow [2023-11-17 12:00:41,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=24031, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1012, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=444, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=25112, PETRI_PLACES=488, PETRI_TRANSITIONS=1017} [2023-11-17 12:00:41,377 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 456 predicate places. [2023-11-17 12:00:41,377 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 1017 transitions, 25112 flow [2023-11-17 12:00:41,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:41,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:00:41,377 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:00:41,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 12:00:41,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:00:41,586 INFO L420 AbstractCegarLoop]: === Iteration 40 === 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 12:00:41,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:00:41,587 INFO L85 PathProgramCache]: Analyzing trace with hash 552328423, now seen corresponding path program 27 times [2023-11-17 12:00:41,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:00:41,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439206707] [2023-11-17 12:00:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:00:41,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:00:41,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:00:42,446 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 12:00:42,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:00:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439206707] [2023-11-17 12:00:42,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439206707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:00:42,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710487020] [2023-11-17 12:00:42,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:00:42,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:00:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:00:42,448 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:00:42,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-17 12:00:42,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:00:42,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:00:42,819 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-17 12:00:42,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:00:43,070 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:00:43,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 40 [2023-11-17 12:00:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 12:00:43,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:00:43,568 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2023-11-17 12:00:43,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 64 treesize of output 236 [2023-11-17 12:00:55,946 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 12:00:55,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710487020] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:00:55,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:00:55,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 27 [2023-11-17 12:00:55,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162049467] [2023-11-17 12:00:55,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:00:55,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-17 12:00:55,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:00:55,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-17 12:00:55,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2023-11-17 12:00:55,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 34 [2023-11-17 12:00:55,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 1017 transitions, 25112 flow. Second operand has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:00:55,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:00:55,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 34 [2023-11-17 12:00:55,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:08,572 INFO L124 PetriNetUnfolderBase]: 13003/19693 cut-off events. [2023-11-17 12:01:08,572 INFO L125 PetriNetUnfolderBase]: For 1899926/1899926 co-relation queries the response was YES. [2023-11-17 12:01:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265377 conditions, 19693 events. 13003/19693 cut-off events. For 1899926/1899926 co-relation queries the response was YES. Maximal size of possible extension queue 1090. Compared 130573 event pairs, 4147 based on Foata normal form. 2/19695 useless extension candidates. Maximal degree in co-relation 265129. Up to 16188 conditions per place. [2023-11-17 12:01:09,709 INFO L140 encePairwiseOnDemand]: 21/34 looper letters, 646 selfloop transitions, 458 changer transitions 2/1106 dead transitions. [2023-11-17 12:01:09,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 1106 transitions, 28449 flow [2023-11-17 12:01:09,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:01:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:01:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 266 transitions. [2023-11-17 12:01:09,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340153452685422 [2023-11-17 12:01:09,711 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 266 transitions. [2023-11-17 12:01:09,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 266 transitions. [2023-11-17 12:01:09,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:09,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 266 transitions. [2023-11-17 12:01:09,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 11.565217391304348) internal successors, (266), 23 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:09,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:09,726 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 34.0) internal successors, (816), 24 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:09,726 INFO L175 Difference]: Start difference. First operand has 488 places, 1017 transitions, 25112 flow. Second operand 23 states and 266 transitions. [2023-11-17 12:01:09,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 1106 transitions, 28449 flow [2023-11-17 12:01:32,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1106 transitions, 27723 flow, removed 25 selfloop flow, removed 19 redundant places. [2023-11-17 12:01:32,162 INFO L231 Difference]: Finished difference. Result has 494 places, 1024 transitions, 25615 flow [2023-11-17 12:01:32,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=24387, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=451, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=25615, PETRI_PLACES=494, PETRI_TRANSITIONS=1024} [2023-11-17 12:01:32,164 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 462 predicate places. [2023-11-17 12:01:32,164 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 1024 transitions, 25615 flow [2023-11-17 12:01:32,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.464285714285714) internal successors, (181), 28 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:32,165 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:32,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:32,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 12:01:32,370 INFO L420 AbstractCegarLoop]: === Iteration 41 === 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 12:01:32,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:32,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1325208493, now seen corresponding path program 28 times [2023-11-17 12:01:32,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:32,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964049760] [2023-11-17 12:01:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:32,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 12:01:33,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964049760] [2023-11-17 12:01:33,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964049760] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:33,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464495038] [2023-11-17 12:01:33,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:33,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:33,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:33,071 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:33,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-17 12:01:33,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:33,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:33,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:33,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:33,747 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-17 12:01:33,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 48 [2023-11-17 12:01:33,777 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-17 12:01:33,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:34,362 INFO L349 Elim1Store]: treesize reduction 4, result has 98.8 percent of original size [2023-11-17 12:01:34,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 89 treesize of output 347 Received shutdown request... [2023-11-17 12:01:43,070 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 4 remaining) [2023-11-17 12:01:43,096 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:01:43,096 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:01:43,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:43,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:43,289 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 41 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-7-3-6-3-6-7-5-3-5-3-4-3-3-3-1 context. [2023-11-17 12:01:43,291 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-11-17 12:01:43,291 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-11-17 12:01:43,291 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-11-17 12:01:43,291 INFO L445 BasicCegarLoop]: Path program histogram: [28, 6, 5, 1, 1] [2023-11-17 12:01:43,294 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:01:43,294 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:01:43,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:01:43 BasicIcfg [2023-11-17 12:01:43,296 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:01:43,296 INFO L158 Benchmark]: Toolchain (without parser) took 530147.34ms. Allocated memory was 181.4MB in the beginning and 5.5GB in the end (delta: 5.4GB). Free memory was 134.1MB in the beginning and 3.4GB in the end (delta: -3.3GB). Peak memory consumption was 2.7GB. Max. memory is 8.0GB. [2023-11-17 12:01:43,296 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory was 136.1MB in the beginning and 135.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:01:43,296 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.82ms. Allocated memory is still 181.4MB. Free memory was 133.7MB in the beginning and 121.5MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:01:43,296 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.32ms. Allocated memory is still 181.4MB. Free memory was 121.5MB in the beginning and 118.6MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-11-17 12:01:43,296 INFO L158 Benchmark]: Boogie Preprocessor took 36.14ms. Allocated memory is still 181.4MB. Free memory was 118.6MB in the beginning and 116.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:01:43,297 INFO L158 Benchmark]: RCFGBuilder took 798.42ms. Allocated memory was 181.4MB in the beginning and 275.8MB in the end (delta: 94.4MB). Free memory was 116.6MB in the beginning and 182.8MB in the end (delta: -66.2MB). Peak memory consumption was 33.1MB. Max. memory is 8.0GB. [2023-11-17 12:01:43,297 INFO L158 Benchmark]: TraceAbstraction took 529033.78ms. Allocated memory was 275.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 181.7MB in the beginning and 3.4GB in the end (delta: -3.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. [2023-11-17 12:01:43,297 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 181.4MB. Free memory was 136.1MB in the beginning and 135.9MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 237.82ms. Allocated memory is still 181.4MB. Free memory was 133.7MB in the beginning and 121.5MB in the end (delta: 12.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.32ms. Allocated memory is still 181.4MB. Free memory was 121.5MB in the beginning and 118.6MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.14ms. Allocated memory is still 181.4MB. Free memory was 118.6MB in the beginning and 116.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 798.42ms. Allocated memory was 181.4MB in the beginning and 275.8MB in the end (delta: 94.4MB). Free memory was 116.6MB in the beginning and 182.8MB in the end (delta: -66.2MB). Peak memory consumption was 33.1MB. Max. memory is 8.0GB. * TraceAbstraction took 529033.78ms. Allocated memory was 275.8MB in the beginning and 5.5GB in the end (delta: 5.3GB). Free memory was 181.7MB in the beginning and 3.4GB in the end (delta: -3.2GB). Peak memory consumption was 2.6GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 33 PlacesBefore, 32 PlacesAfterwards, 29 TransitionsBefore, 28 TransitionsAfterwards, 144 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 138 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 128, independent: 124, independent conditional: 0, independent unconditional: 124, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 61, independent: 59, independent conditional: 0, independent unconditional: 59, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 61, independent: 59, independent conditional: 0, independent unconditional: 59, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 2, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 10, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 128, independent: 65, independent conditional: 0, independent unconditional: 65, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 61, unknown conditional: 0, unknown unconditional: 61] , Statistics on independence cache: Total cache size (in pairs): 61, Positive cache size: 59, Positive conditional cache size: 0, Positive unconditional cache size: 59, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 109]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while CegarLoopForPetriNet was analyzing trace of length 41 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-7-3-6-3-6-7-5-3-5-3-4-3-3-3-1 context. - TimeoutResultAtElement [Line: 102]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 41 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-7-3-6-3-6-7-5-3-5-3-4-3-3-3-1 context. - TimeoutResultAtElement [Line: 103]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 41 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-7-3-6-3-6-7-5-3-5-3-4-3-3-3-1 context. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while CegarLoopForPetriNet was analyzing trace of length 41 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-2-2-3-2-2-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-28-7-3-6-3-6-7-5-3-5-3-4-3-3-3-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 40 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 528.9s, OverallIterations: 41, TraceHistogramMax: 5, PathProgramHistogramMax: 28, EmptinessCheckTime: 0.0s, AutomataDifference: 319.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 7410 SdHoareTripleChecker+Valid, 27.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7410 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 23.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 1636 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45534 IncrementalHoareTripleChecker+Invalid, 47171 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1636 mSolverCounterUnsat, 0 mSDtfsCounter, 45534 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3424 GetRequests, 2010 SyntacticMatches, 6 SemanticMatches, 1408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19554 ImplicationChecksByTransitivity, 33.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25615occurred in iteration=40, InterpolantAutomatonStates: 715, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 4.6s SatisfiabilityAnalysisTime, 180.0s InterpolantComputationTime, 2822 NumberOfCodeBlocks, 2742 NumberOfCodeBlocksAsserted, 114 NumberOfCheckSat, 3939 ConstructedInterpolants, 172 QuantifiedInterpolants, 43896 SizeOfPredicates, 659 NumberOfNonLiveVariables, 14238 ConjunctsInSsa, 1052 ConjunctsInUnsatCore, 104 InterpolantComputations, 11 PerfectInterpolantSequences, 4338/4647 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown