/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/fibonacci.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 12:01:07,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 12:01:07,786 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 12:01:07,840 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 12:01:07,841 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 12:01:07,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 12:01:07,842 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 12:01:07,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 12:01:07,843 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 12:01:07,846 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 12:01:07,847 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 12:01:07,847 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 12:01:07,847 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 12:01:07,848 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 12:01:07,849 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 12:01:07,849 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 12:01:07,849 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 12:01:07,849 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 12:01:07,849 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 12:01:07,850 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 12:01:07,850 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 12:01:07,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 12:01:07,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 12:01:07,858 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 12:01:07,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 12:01:07,858 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:01:07,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 12:01:07,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 12:01:07,860 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 12:01:07,860 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 12:01:07,861 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 12:01:07,861 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 12:01:07,861 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Only consider context switches at boundaries of atomic blocks -> true [2023-11-17 12:01:08,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 12:01:08,302 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 12:01:08,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 12:01:08,306 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 12:01:08,306 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 12:01:08,307 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-11-17 12:01:09,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 12:01:09,884 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 12:01:09,885 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/fibonacci.wvr.c [2023-11-17 12:01:09,894 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c118d38/82a7e2a29af74b488e8d1842fad3b005/FLAG090bea210 [2023-11-17 12:01:09,915 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c118d38/82a7e2a29af74b488e8d1842fad3b005 [2023-11-17 12:01:09,918 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 12:01:09,919 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 12:01:09,923 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 12:01:09,923 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 12:01:09,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 12:01:09,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:01:09" (1/1) ... [2023-11-17 12:01:09,932 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51ed83d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:09, skipping insertion in model container [2023-11-17 12:01:09,932 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 12:01:09" (1/1) ... [2023-11-17 12:01:09,962 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 12:01:10,118 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/fibonacci.wvr.c[2356,2369] [2023-11-17 12:01:10,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:01:10,144 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 12:01:10,168 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/fibonacci.wvr.c[2356,2369] [2023-11-17 12:01:10,171 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 12:01:10,188 INFO L206 MainTranslator]: Completed translation [2023-11-17 12:01:10,188 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10 WrapperNode [2023-11-17 12:01:10,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 12:01:10,190 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 12:01:10,190 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 12:01:10,190 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 12:01:10,196 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,205 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,229 INFO L138 Inliner]: procedures = 23, calls = 28, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 172 [2023-11-17 12:01:10,230 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 12:01:10,231 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 12:01:10,231 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 12:01:10,231 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 12:01:10,242 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,242 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,245 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,245 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,258 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,259 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,262 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 12:01:10,263 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 12:01:10,263 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 12:01:10,263 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 12:01:10,264 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (1/1) ... [2023-11-17 12:01:10,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 12:01:10,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:10,322 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 12:01:10,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 12:01:10,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 12:01:10,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 12:01:10,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 12:01:10,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 12:01:10,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 12:01:10,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 12:01:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 12:01:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 12:01:10,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 12:01:10,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 12:01:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 12:01:10,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 12:01:10,425 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 12:01:10,531 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 12:01:10,533 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 12:01:10,875 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 12:01:11,237 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 12:01:11,237 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 12:01:11,238 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:01:11 BoogieIcfgContainer [2023-11-17 12:01:11,239 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 12:01:11,242 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 12:01:11,242 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 12:01:11,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 12:01:11,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 12:01:09" (1/3) ... [2023-11-17 12:01:11,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c771399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:01:11, skipping insertion in model container [2023-11-17 12:01:11,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 12:01:10" (2/3) ... [2023-11-17 12:01:11,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c771399 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 12:01:11, skipping insertion in model container [2023-11-17 12:01:11,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 12:01:11" (3/3) ... [2023-11-17 12:01:11,250 INFO L112 eAbstractionObserver]: Analyzing ICFG fibonacci.wvr.c [2023-11-17 12:01:11,268 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 12:01:11,269 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 12:01:11,269 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 12:01:11,321 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 12:01:11,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 24 places, 19 transitions, 52 flow [2023-11-17 12:01:11,411 INFO L124 PetriNetUnfolderBase]: 2/17 cut-off events. [2023-11-17 12:01:11,411 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:01:11,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26 conditions, 17 events. 2/17 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-17 12:01:11,416 INFO L82 GeneralOperation]: Start removeDead. Operand has 24 places, 19 transitions, 52 flow [2023-11-17 12:01:11,420 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:11,426 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 12:01:11,452 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:11,460 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:11,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 21 places, 16 transitions, 44 flow [2023-11-17 12:01:11,468 INFO L124 PetriNetUnfolderBase]: 2/16 cut-off events. [2023-11-17 12:01:11,468 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:01:11,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25 conditions, 16 events. 2/16 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 10 event pairs, 0 based on Foata normal form. 0/14 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2023-11-17 12:01:11,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 54 [2023-11-17 12:01:11,549 INFO L134 LiptonReduction]: Checked pairs total: 48 [2023-11-17 12:01:11,549 INFO L136 LiptonReduction]: Total number of compositions: 1 [2023-11-17 12:01:11,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 12:01:11,578 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;@eae5773, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 12:01:11,578 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 12:01:11,588 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 12:01:11,589 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 12:01:11,589 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 12:01:11,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:11,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:11,590 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:11,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1473778588, now seen corresponding path program 1 times [2023-11-17 12:01:11,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:11,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277635302] [2023-11-17 12:01:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:11,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:12,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:12,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:12,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277635302] [2023-11-17 12:01:12,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277635302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:12,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:12,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:01:12,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397030470] [2023-11-17 12:01:12,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:12,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:12,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:12,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:12,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:12,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:12,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:12,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:12,565 INFO L124 PetriNetUnfolderBase]: 73/139 cut-off events. [2023-11-17 12:01:12,565 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 12:01:12,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 139 events. 73/139 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 390 event pairs, 15 based on Foata normal form. 1/108 useless extension candidates. Maximal degree in co-relation 222. Up to 79 conditions per place. [2023-11-17 12:01:12,571 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 28 selfloop transitions, 5 changer transitions 5/38 dead transitions. [2023-11-17 12:01:12,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 38 transitions, 182 flow [2023-11-17 12:01:12,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:12,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:12,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 54 transitions. [2023-11-17 12:01:12,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54 [2023-11-17 12:01:12,583 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 54 transitions. [2023-11-17 12:01:12,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 54 transitions. [2023-11-17 12:01:12,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:12,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 54 transitions. [2023-11-17 12:01:12,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,593 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,595 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 5 states and 54 transitions. [2023-11-17 12:01:12,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 38 transitions, 182 flow [2023-11-17 12:01:12,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 38 transitions, 162 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:12,604 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 68 flow [2023-11-17 12:01:12,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=68, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2023-11-17 12:01:12,610 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 3 predicate places. [2023-11-17 12:01:12,610 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 68 flow [2023-11-17 12:01:12,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:12,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:12,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 12:01:12,612 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:12,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash -852239612, now seen corresponding path program 2 times [2023-11-17 12:01:12,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:12,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680793074] [2023-11-17 12:01:12,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:12,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:12,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680793074] [2023-11-17 12:01:12,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680793074] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:12,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:12,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 12:01:12,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637227001] [2023-11-17 12:01:12,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:12,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:12,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:12,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:12,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:12,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:12,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:12,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:12,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:12,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:13,030 INFO L124 PetriNetUnfolderBase]: 72/132 cut-off events. [2023-11-17 12:01:13,030 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2023-11-17 12:01:13,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 132 events. 72/132 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 368 event pairs, 11 based on Foata normal form. 1/125 useless extension candidates. Maximal degree in co-relation 355. Up to 79 conditions per place. [2023-11-17 12:01:13,033 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 26 selfloop transitions, 6 changer transitions 5/37 dead transitions. [2023-11-17 12:01:13,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 37 transitions, 192 flow [2023-11-17 12:01:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:13,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:13,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:01:13,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-11-17 12:01:13,036 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:01:13,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:01:13,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:13,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:01:13,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,040 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,040 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 68 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:01:13,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 37 transitions, 192 flow [2023-11-17 12:01:13,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 37 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 12:01:13,044 INFO L231 Difference]: Finished difference. Result has 28 places, 21 transitions, 100 flow [2023-11-17 12:01:13,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=100, PETRI_PLACES=28, PETRI_TRANSITIONS=21} [2023-11-17 12:01:13,045 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 8 predicate places. [2023-11-17 12:01:13,046 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 21 transitions, 100 flow [2023-11-17 12:01:13,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:13,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:13,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 12:01:13,047 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:13,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:13,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1097076913, now seen corresponding path program 1 times [2023-11-17 12:01:13,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:13,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227801196] [2023-11-17 12:01:13,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:13,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:13,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:13,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227801196] [2023-11-17 12:01:13,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227801196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:13,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:13,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:13,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016856016] [2023-11-17 12:01:13,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:13,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:13,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:13,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:13,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:13,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:13,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 21 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:13,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:13,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:13,250 INFO L124 PetriNetUnfolderBase]: 85/150 cut-off events. [2023-11-17 12:01:13,250 INFO L125 PetriNetUnfolderBase]: For 140/140 co-relation queries the response was YES. [2023-11-17 12:01:13,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 150 events. 85/150 cut-off events. For 140/140 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 425 event pairs, 28 based on Foata normal form. 4/144 useless extension candidates. Maximal degree in co-relation 484. Up to 112 conditions per place. [2023-11-17 12:01:13,254 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 25 selfloop transitions, 10 changer transitions 4/39 dead transitions. [2023-11-17 12:01:13,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 39 transitions, 262 flow [2023-11-17 12:01:13,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:13,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 47 transitions. [2023-11-17 12:01:13,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-17 12:01:13,256 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 47 transitions. [2023-11-17 12:01:13,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 47 transitions. [2023-11-17 12:01:13,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:13,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 47 transitions. [2023-11-17 12:01:13,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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 12:01:13,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,259 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,259 INFO L175 Difference]: Start difference. First operand has 28 places, 21 transitions, 100 flow. Second operand 5 states and 47 transitions. [2023-11-17 12:01:13,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 39 transitions, 262 flow [2023-11-17 12:01:13,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 39 transitions, 248 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-11-17 12:01:13,262 INFO L231 Difference]: Finished difference. Result has 32 places, 27 transitions, 168 flow [2023-11-17 12:01:13,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=32, PETRI_TRANSITIONS=27} [2023-11-17 12:01:13,264 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 12 predicate places. [2023-11-17 12:01:13,264 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 27 transitions, 168 flow [2023-11-17 12:01:13,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:13,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:13,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 12:01:13,265 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:13,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:13,266 INFO L85 PathProgramCache]: Analyzing trace with hash -105924419, now seen corresponding path program 2 times [2023-11-17 12:01:13,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243658638] [2023-11-17 12:01:13,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:13,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243658638] [2023-11-17 12:01:13,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243658638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:13,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:13,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:13,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946801226] [2023-11-17 12:01:13,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:13,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:13,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:13,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:13,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:13,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:13,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 27 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:13,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:13,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:13,469 INFO L124 PetriNetUnfolderBase]: 89/164 cut-off events. [2023-11-17 12:01:13,469 INFO L125 PetriNetUnfolderBase]: For 218/218 co-relation queries the response was YES. [2023-11-17 12:01:13,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 164 events. 89/164 cut-off events. For 218/218 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 497 event pairs, 28 based on Foata normal form. 4/154 useless extension candidates. Maximal degree in co-relation 532. Up to 86 conditions per place. [2023-11-17 12:01:13,472 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 34 selfloop transitions, 7 changer transitions 6/47 dead transitions. [2023-11-17 12:01:13,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 47 transitions, 332 flow [2023-11-17 12:01:13,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:13,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 52 transitions. [2023-11-17 12:01:13,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.52 [2023-11-17 12:01:13,474 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 52 transitions. [2023-11-17 12:01:13,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 52 transitions. [2023-11-17 12:01:13,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:13,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 52 transitions. [2023-11-17 12:01:13,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.4) internal successors, (52), 5 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,503 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,503 INFO L175 Difference]: Start difference. First operand has 32 places, 27 transitions, 168 flow. Second operand 5 states and 52 transitions. [2023-11-17 12:01:13,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 47 transitions, 332 flow [2023-11-17 12:01:13,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 47 transitions, 311 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-11-17 12:01:13,511 INFO L231 Difference]: Finished difference. Result has 35 places, 27 transitions, 167 flow [2023-11-17 12:01:13,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=167, PETRI_PLACES=35, PETRI_TRANSITIONS=27} [2023-11-17 12:01:13,513 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 15 predicate places. [2023-11-17 12:01:13,513 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 27 transitions, 167 flow [2023-11-17 12:01:13,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:13,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:13,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:13,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 12:01:13,514 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:13,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:13,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1424646844, now seen corresponding path program 1 times [2023-11-17 12:01:13,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:13,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872773364] [2023-11-17 12:01:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:13,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:13,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:13,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872773364] [2023-11-17 12:01:13,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872773364] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:13,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823442575] [2023-11-17 12:01:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:13,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:13,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:13,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:13,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 12:01:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:13,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:01:13,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:13,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:13,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823442575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:13,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:13,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:01:13,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051840371] [2023-11-17 12:01:13,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:13,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:01:13,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:01:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:01:13,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:13,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 27 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 12:01:13,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:13,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:13,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:14,030 INFO L124 PetriNetUnfolderBase]: 94/171 cut-off events. [2023-11-17 12:01:14,030 INFO L125 PetriNetUnfolderBase]: For 211/211 co-relation queries the response was YES. [2023-11-17 12:01:14,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 171 events. 94/171 cut-off events. For 211/211 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 522 event pairs, 14 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 558. Up to 59 conditions per place. [2023-11-17 12:01:14,032 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 45 selfloop transitions, 13 changer transitions 0/58 dead transitions. [2023-11-17 12:01:14,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 58 transitions, 398 flow [2023-11-17 12:01:14,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:14,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 70 transitions. [2023-11-17 12:01:14,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:01:14,034 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 70 transitions. [2023-11-17 12:01:14,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 70 transitions. [2023-11-17 12:01:14,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:14,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 70 transitions. [2023-11-17 12:01:14,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,035 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,035 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,035 INFO L175 Difference]: Start difference. First operand has 35 places, 27 transitions, 167 flow. Second operand 7 states and 70 transitions. [2023-11-17 12:01:14,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 58 transitions, 398 flow [2023-11-17 12:01:14,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 58 transitions, 384 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:14,039 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 221 flow [2023-11-17 12:01:14,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=221, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2023-11-17 12:01:14,039 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 19 predicate places. [2023-11-17 12:01:14,040 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 221 flow [2023-11-17 12:01:14,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 12:01:14,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:14,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:14,048 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 12:01:14,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:14,248 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:14,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:14,249 INFO L85 PathProgramCache]: Analyzing trace with hash -742224932, now seen corresponding path program 2 times [2023-11-17 12:01:14,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:14,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764642844] [2023-11-17 12:01:14,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:14,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:14,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:14,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764642844] [2023-11-17 12:01:14,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764642844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:14,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:14,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:14,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523529537] [2023-11-17 12:01:14,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:14,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:14,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:14,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:14,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:14,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:14,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:14,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:14,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:14,391 INFO L124 PetriNetUnfolderBase]: 116/205 cut-off events. [2023-11-17 12:01:14,391 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2023-11-17 12:01:14,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 871 conditions, 205 events. 116/205 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 616 event pairs, 30 based on Foata normal form. 0/185 useless extension candidates. Maximal degree in co-relation 695. Up to 158 conditions per place. [2023-11-17 12:01:14,394 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 31 selfloop transitions, 19 changer transitions 1/51 dead transitions. [2023-11-17 12:01:14,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 51 transitions, 439 flow [2023-11-17 12:01:14,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:14,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:14,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 50 transitions. [2023-11-17 12:01:14,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:01:14,395 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 50 transitions. [2023-11-17 12:01:14,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 50 transitions. [2023-11-17 12:01:14,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:14,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 50 transitions. [2023-11-17 12:01:14,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 10.0) internal successors, (50), 5 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,396 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,397 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 221 flow. Second operand 5 states and 50 transitions. [2023-11-17 12:01:14,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 51 transitions, 439 flow [2023-11-17 12:01:14,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 51 transitions, 405 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-11-17 12:01:14,400 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 320 flow [2023-11-17 12:01:14,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-11-17 12:01:14,401 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-17 12:01:14,401 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 320 flow [2023-11-17 12:01:14,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:14,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:14,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 12:01:14,402 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:14,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:14,403 INFO L85 PathProgramCache]: Analyzing trace with hash 634387474, now seen corresponding path program 3 times [2023-11-17 12:01:14,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:14,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142275215] [2023-11-17 12:01:14,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:14,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:14,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:14,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:14,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142275215] [2023-11-17 12:01:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142275215] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:14,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:14,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072898776] [2023-11-17 12:01:14,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:14,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:14,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:14,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:14,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 320 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:14,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:14,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:14,543 INFO L124 PetriNetUnfolderBase]: 114/207 cut-off events. [2023-11-17 12:01:14,543 INFO L125 PetriNetUnfolderBase]: For 671/671 co-relation queries the response was YES. [2023-11-17 12:01:14,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 970 conditions, 207 events. 114/207 cut-off events. For 671/671 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 29 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 855. Up to 131 conditions per place. [2023-11-17 12:01:14,546 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 35 selfloop transitions, 15 changer transitions 3/53 dead transitions. [2023-11-17 12:01:14,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 53 transitions, 478 flow [2023-11-17 12:01:14,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 48 transitions. [2023-11-17 12:01:14,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-17 12:01:14,547 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 48 transitions. [2023-11-17 12:01:14,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 48 transitions. [2023-11-17 12:01:14,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:14,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 48 transitions. [2023-11-17 12:01:14,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,549 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 320 flow. Second operand 5 states and 48 transitions. [2023-11-17 12:01:14,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 53 transitions, 478 flow [2023-11-17 12:01:14,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 53 transitions, 446 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-17 12:01:14,554 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 313 flow [2023-11-17 12:01:14,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2023-11-17 12:01:14,555 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 29 predicate places. [2023-11-17 12:01:14,555 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 313 flow [2023-11-17 12:01:14,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:14,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:14,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 12:01:14,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:14,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:14,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1860511185, now seen corresponding path program 3 times [2023-11-17 12:01:14,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:14,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8639489] [2023-11-17 12:01:14,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:14,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:14,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:14,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8639489] [2023-11-17 12:01:14,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8639489] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:14,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410359299] [2023-11-17 12:01:14,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:14,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:14,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:14,643 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:14,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 12:01:14,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:14,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:14,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:01:14,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:14,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410359299] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:14,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:14,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-17 12:01:14,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101720436] [2023-11-17 12:01:14,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:14,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-17 12:01:14,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:14,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-17 12:01:14,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-17 12:01:14,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:14,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 313 flow. Second operand has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 12:01:14,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:14,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:14,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:14,959 INFO L124 PetriNetUnfolderBase]: 118/211 cut-off events. [2023-11-17 12:01:14,959 INFO L125 PetriNetUnfolderBase]: For 725/725 co-relation queries the response was YES. [2023-11-17 12:01:14,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 211 events. 118/211 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 632 event pairs, 12 based on Foata normal form. 4/215 useless extension candidates. Maximal degree in co-relation 939. Up to 67 conditions per place. [2023-11-17 12:01:14,961 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 44 selfloop transitions, 21 changer transitions 0/65 dead transitions. [2023-11-17 12:01:14,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 65 transitions, 572 flow [2023-11-17 12:01:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:14,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:14,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 66 transitions. [2023-11-17 12:01:14,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2023-11-17 12:01:14,963 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 66 transitions. [2023-11-17 12:01:14,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 66 transitions. [2023-11-17 12:01:14,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:14,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 66 transitions. [2023-11-17 12:01:14,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,964 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,964 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:14,964 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 313 flow. Second operand 7 states and 66 transitions. [2023-11-17 12:01:14,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 65 transitions, 572 flow [2023-11-17 12:01:14,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 65 transitions, 532 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-11-17 12:01:14,968 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 371 flow [2023-11-17 12:01:14,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2023-11-17 12:01:14,969 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 31 predicate places. [2023-11-17 12:01:14,969 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 371 flow [2023-11-17 12:01:14,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.75) internal successors, (46), 8 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 12:01:14,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:14,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:14,982 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 12:01:15,183 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,SelfDestructingSolverStorable7 [2023-11-17 12:01:15,183 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:15,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1840703398, now seen corresponding path program 4 times [2023-11-17 12:01:15,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:15,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122070507] [2023-11-17 12:01:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:15,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:15,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:15,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122070507] [2023-11-17 12:01:15,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122070507] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:15,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:15,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:15,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114956724] [2023-11-17 12:01:15,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:15,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:15,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:15,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:15,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:15,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:15,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 371 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:15,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:15,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:15,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:15,412 INFO L124 PetriNetUnfolderBase]: 117/212 cut-off events. [2023-11-17 12:01:15,412 INFO L125 PetriNetUnfolderBase]: For 844/844 co-relation queries the response was YES. [2023-11-17 12:01:15,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 212 events. 117/212 cut-off events. For 844/844 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 664 event pairs, 36 based on Foata normal form. 2/214 useless extension candidates. Maximal degree in co-relation 857. Up to 174 conditions per place. [2023-11-17 12:01:15,415 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 33 selfloop transitions, 15 changer transitions 2/50 dead transitions. [2023-11-17 12:01:15,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 50 transitions, 506 flow [2023-11-17 12:01:15,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:15,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:15,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2023-11-17 12:01:15,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-17 12:01:15,416 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 44 transitions. [2023-11-17 12:01:15,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 44 transitions. [2023-11-17 12:01:15,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:15,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 44 transitions. [2023-11-17 12:01:15,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:15,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:15,417 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:15,418 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 371 flow. Second operand 5 states and 44 transitions. [2023-11-17 12:01:15,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 50 transitions, 506 flow [2023-11-17 12:01:15,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 453 flow, removed 11 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:15,421 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 339 flow [2023-11-17 12:01:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=339, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2023-11-17 12:01:15,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 32 predicate places. [2023-11-17 12:01:15,422 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 339 flow [2023-11-17 12:01:15,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:15,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:15,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:15,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-17 12:01:15,423 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:15,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash 25323482, now seen corresponding path program 5 times [2023-11-17 12:01:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424688449] [2023-11-17 12:01:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:15,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:15,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:15,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:15,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:15,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424688449] [2023-11-17 12:01:15,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424688449] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:15,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074651958] [2023-11-17 12:01:15,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:15,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:15,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:15,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:15,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 12:01:15,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:15,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:15,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:01:15,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:15,593 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:15,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:15,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074651958] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:15,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:15,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:01:15,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110296746] [2023-11-17 12:01:15,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:15,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:01:15,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:15,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:01:15,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:01:15,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:15,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 339 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 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 12:01:15,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:15,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:15,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:15,755 INFO L124 PetriNetUnfolderBase]: 118/217 cut-off events. [2023-11-17 12:01:15,756 INFO L125 PetriNetUnfolderBase]: For 620/620 co-relation queries the response was YES. [2023-11-17 12:01:15,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 217 events. 118/217 cut-off events. For 620/620 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 690 event pairs, 20 based on Foata normal form. 6/223 useless extension candidates. Maximal degree in co-relation 797. Up to 112 conditions per place. [2023-11-17 12:01:15,758 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 44 selfloop transitions, 26 changer transitions 0/70 dead transitions. [2023-11-17 12:01:15,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 599 flow [2023-11-17 12:01:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:15,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:15,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 84 transitions. [2023-11-17 12:01:15,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42 [2023-11-17 12:01:15,760 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 84 transitions. [2023-11-17 12:01:15,760 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 84 transitions. [2023-11-17 12:01:15,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:15,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 84 transitions. [2023-11-17 12:01:15,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.4) internal successors, (84), 10 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 12:01:15,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:15,761 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:15,761 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 339 flow. Second operand 10 states and 84 transitions. [2023-11-17 12:01:15,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 599 flow [2023-11-17 12:01:15,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 569 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:15,765 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 400 flow [2023-11-17 12:01:15,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-11-17 12:01:15,766 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-11-17 12:01:15,766 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 400 flow [2023-11-17 12:01:15,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 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 12:01:15,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:15,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:15,790 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 12:01:15,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:15,974 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:15,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:15,975 INFO L85 PathProgramCache]: Analyzing trace with hash 958787191, now seen corresponding path program 4 times [2023-11-17 12:01:15,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:15,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830579595] [2023-11-17 12:01:15,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:15,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830579595] [2023-11-17 12:01:16,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830579595] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:16,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:16,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828589025] [2023-11-17 12:01:16,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:16,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:16,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:16,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:16,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:16,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 400 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:16,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:16,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:16,107 INFO L124 PetriNetUnfolderBase]: 124/227 cut-off events. [2023-11-17 12:01:16,107 INFO L125 PetriNetUnfolderBase]: For 791/791 co-relation queries the response was YES. [2023-11-17 12:01:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1103 conditions, 227 events. 124/227 cut-off events. For 791/791 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 736 event pairs, 34 based on Foata normal form. 4/231 useless extension candidates. Maximal degree in co-relation 1015. Up to 186 conditions per place. [2023-11-17 12:01:16,109 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 41 selfloop transitions, 16 changer transitions 0/57 dead transitions. [2023-11-17 12:01:16,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 576 flow [2023-11-17 12:01:16,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:16,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 46 transitions. [2023-11-17 12:01:16,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46 [2023-11-17 12:01:16,110 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 46 transitions. [2023-11-17 12:01:16,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 46 transitions. [2023-11-17 12:01:16,110 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:16,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 46 transitions. [2023-11-17 12:01:16,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 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 12:01:16,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,111 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,111 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 400 flow. Second operand 5 states and 46 transitions. [2023-11-17 12:01:16,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 57 transitions, 576 flow [2023-11-17 12:01:16,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 510 flow, removed 10 selfloop flow, removed 5 redundant places. [2023-11-17 12:01:16,115 INFO L231 Difference]: Finished difference. Result has 58 places, 48 transitions, 377 flow [2023-11-17 12:01:16,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=377, PETRI_PLACES=58, PETRI_TRANSITIONS=48} [2023-11-17 12:01:16,115 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 38 predicate places. [2023-11-17 12:01:16,116 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 48 transitions, 377 flow [2023-11-17 12:01:16,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:16,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:16,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-17 12:01:16,116 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:16,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:16,117 INFO L85 PathProgramCache]: Analyzing trace with hash 975524128, now seen corresponding path program 6 times [2023-11-17 12:01:16,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:16,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511094393] [2023-11-17 12:01:16,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:16,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:16,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:16,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511094393] [2023-11-17 12:01:16,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511094393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:16,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:16,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:16,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831763807] [2023-11-17 12:01:16,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:16,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:16,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:16,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:16,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:16,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:16,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 48 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:16,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:16,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:16,275 INFO L124 PetriNetUnfolderBase]: 120/215 cut-off events. [2023-11-17 12:01:16,275 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2023-11-17 12:01:16,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1007 conditions, 215 events. 120/215 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 664 event pairs, 29 based on Foata normal form. 2/217 useless extension candidates. Maximal degree in co-relation 923. Up to 157 conditions per place. [2023-11-17 12:01:16,277 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 34 selfloop transitions, 18 changer transitions 2/54 dead transitions. [2023-11-17 12:01:16,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 501 flow [2023-11-17 12:01:16,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:16,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:16,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 44 transitions. [2023-11-17 12:01:16,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2023-11-17 12:01:16,278 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 44 transitions. [2023-11-17 12:01:16,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 44 transitions. [2023-11-17 12:01:16,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:16,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 44 transitions. [2023-11-17 12:01:16,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,279 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,279 INFO L175 Difference]: Start difference. First operand has 58 places, 48 transitions, 377 flow. Second operand 5 states and 44 transitions. [2023-11-17 12:01:16,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 501 flow [2023-11-17 12:01:16,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 465 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:16,283 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 358 flow [2023-11-17 12:01:16,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2023-11-17 12:01:16,284 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-11-17 12:01:16,284 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 358 flow [2023-11-17 12:01:16,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:16,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:16,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-17 12:01:16,285 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:16,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:16,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1924583847, now seen corresponding path program 5 times [2023-11-17 12:01:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:16,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23342563] [2023-11-17 12:01:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:16,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:16,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:16,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23342563] [2023-11-17 12:01:16,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23342563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 12:01:16,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 12:01:16,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 12:01:16,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901304069] [2023-11-17 12:01:16,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 12:01:16,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-17 12:01:16,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:16,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-17 12:01:16,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-17 12:01:16,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:16,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 358 flow. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:16,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:16,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:16,407 INFO L124 PetriNetUnfolderBase]: 115/208 cut-off events. [2023-11-17 12:01:16,407 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-11-17 12:01:16,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 208 events. 115/208 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 649 event pairs, 31 based on Foata normal form. 4/212 useless extension candidates. Maximal degree in co-relation 871. Up to 153 conditions per place. [2023-11-17 12:01:16,409 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 34 selfloop transitions, 16 changer transitions 4/54 dead transitions. [2023-11-17 12:01:16,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 487 flow [2023-11-17 12:01:16,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-17 12:01:16,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-17 12:01:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 45 transitions. [2023-11-17 12:01:16,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-17 12:01:16,410 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 45 transitions. [2023-11-17 12:01:16,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 45 transitions. [2023-11-17 12:01:16,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:16,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 45 transitions. [2023-11-17 12:01:16,410 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 9.0) internal successors, (45), 5 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,411 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,411 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 358 flow. Second operand 5 states and 45 transitions. [2023-11-17 12:01:16,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 487 flow [2023-11-17 12:01:16,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 446 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:16,414 INFO L231 Difference]: Finished difference. Result has 56 places, 44 transitions, 328 flow [2023-11-17 12:01:16,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=56, PETRI_TRANSITIONS=44} [2023-11-17 12:01:16,415 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-17 12:01:16,415 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 44 transitions, 328 flow [2023-11-17 12:01:16,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:16,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:16,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-17 12:01:16,416 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:16,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:16,416 INFO L85 PathProgramCache]: Analyzing trace with hash 722074421, now seen corresponding path program 6 times [2023-11-17 12:01:16,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:16,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284792824] [2023-11-17 12:01:16,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:16,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:16,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:16,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:16,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284792824] [2023-11-17 12:01:16,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284792824] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:16,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300920521] [2023-11-17 12:01:16,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:16,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:16,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:16,485 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:16,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 12:01:16,591 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:16,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 12:01:16,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:16,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300920521] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:16,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:01:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927537013] [2023-11-17 12:01:16,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:16,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-17 12:01:16,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:16,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-17 12:01:16,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-17 12:01:16,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:16,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 328 flow. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 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 12:01:16,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:16,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:16,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:16,784 INFO L124 PetriNetUnfolderBase]: 110/193 cut-off events. [2023-11-17 12:01:16,784 INFO L125 PetriNetUnfolderBase]: For 482/482 co-relation queries the response was YES. [2023-11-17 12:01:16,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 193 events. 110/193 cut-off events. For 482/482 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 560 event pairs, 14 based on Foata normal form. 4/197 useless extension candidates. Maximal degree in co-relation 788. Up to 68 conditions per place. [2023-11-17 12:01:16,786 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 41 selfloop transitions, 27 changer transitions 0/68 dead transitions. [2023-11-17 12:01:16,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 582 flow [2023-11-17 12:01:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:16,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:16,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 79 transitions. [2023-11-17 12:01:16,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395 [2023-11-17 12:01:16,787 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 79 transitions. [2023-11-17 12:01:16,787 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 79 transitions. [2023-11-17 12:01:16,787 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:16,787 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 79 transitions. [2023-11-17 12:01:16,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.9) internal successors, (79), 10 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:16,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:16,788 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:16,788 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 328 flow. Second operand 10 states and 79 transitions. [2023-11-17 12:01:16,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 582 flow [2023-11-17 12:01:16,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 68 transitions, 543 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:16,792 INFO L231 Difference]: Finished difference. Result has 60 places, 49 transitions, 394 flow [2023-11-17 12:01:16,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=394, PETRI_PLACES=60, PETRI_TRANSITIONS=49} [2023-11-17 12:01:16,793 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 12:01:16,793 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 49 transitions, 394 flow [2023-11-17 12:01:16,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 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 12:01:16,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:16,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:16,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:17,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:17,001 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:17,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:17,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1153069577, now seen corresponding path program 1 times [2023-11-17 12:01:17,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:17,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011034714] [2023-11-17 12:01:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:17,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:17,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011034714] [2023-11-17 12:01:17,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011034714] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757827726] [2023-11-17 12:01:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:17,225 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:17,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 12:01:17,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:17,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:01:17,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:17,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:17,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757827726] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:17,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:17,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-11-17 12:01:17,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215184378] [2023-11-17 12:01:17,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:17,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:17,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:17,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:17,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:17,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:17,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 49 transitions, 394 flow. Second operand has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:17,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:17,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:17,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:17,752 INFO L124 PetriNetUnfolderBase]: 161/291 cut-off events. [2023-11-17 12:01:17,752 INFO L125 PetriNetUnfolderBase]: For 780/780 co-relation queries the response was YES. [2023-11-17 12:01:17,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 291 events. 161/291 cut-off events. For 780/780 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1020 event pairs, 16 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1272. Up to 185 conditions per place. [2023-11-17 12:01:17,755 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 64 selfloop transitions, 18 changer transitions 5/87 dead transitions. [2023-11-17 12:01:17,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 87 transitions, 759 flow [2023-11-17 12:01:17,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:17,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 71 transitions. [2023-11-17 12:01:17,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5071428571428571 [2023-11-17 12:01:17,757 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 71 transitions. [2023-11-17 12:01:17,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 71 transitions. [2023-11-17 12:01:17,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:17,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 71 transitions. [2023-11-17 12:01:17,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:17,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:17,758 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:17,758 INFO L175 Difference]: Start difference. First operand has 60 places, 49 transitions, 394 flow. Second operand 7 states and 71 transitions. [2023-11-17 12:01:17,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 87 transitions, 759 flow [2023-11-17 12:01:17,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 87 transitions, 659 flow, removed 14 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:17,763 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 464 flow [2023-11-17 12:01:17,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2023-11-17 12:01:17,763 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-11-17 12:01:17,764 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 464 flow [2023-11-17 12:01:17,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.846153846153846) internal successors, (76), 13 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:17,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:17,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:17,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:17,971 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,SelfDestructingSolverStorable14 [2023-11-17 12:01:17,972 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:17,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:17,972 INFO L85 PathProgramCache]: Analyzing trace with hash 769427867, now seen corresponding path program 2 times [2023-11-17 12:01:17,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:17,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139092245] [2023-11-17 12:01:17,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:17,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:18,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:18,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:18,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139092245] [2023-11-17 12:01:18,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139092245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:18,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343426257] [2023-11-17 12:01:18,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:18,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:18,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:18,289 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:18,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 12:01:18,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:18,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:18,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:01:18,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:18,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:18,662 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:18,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343426257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:18,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:18,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:01:18,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276619946] [2023-11-17 12:01:18,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:18,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:18,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:18,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:18,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:18,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 464 flow. Second operand has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:18,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:18,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:18,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:19,082 INFO L124 PetriNetUnfolderBase]: 166/300 cut-off events. [2023-11-17 12:01:19,083 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2023-11-17 12:01:19,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448 conditions, 300 events. 166/300 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1062 event pairs, 18 based on Foata normal form. 1/301 useless extension candidates. Maximal degree in co-relation 1421. Up to 213 conditions per place. [2023-11-17 12:01:19,086 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 19 changer transitions 5/86 dead transitions. [2023-11-17 12:01:19,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 86 transitions, 756 flow [2023-11-17 12:01:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:19,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:19,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 67 transitions. [2023-11-17 12:01:19,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4785714285714286 [2023-11-17 12:01:19,087 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 67 transitions. [2023-11-17 12:01:19,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 67 transitions. [2023-11-17 12:01:19,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:19,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 67 transitions. [2023-11-17 12:01:19,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:19,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:19,090 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:19,090 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 464 flow. Second operand 7 states and 67 transitions. [2023-11-17 12:01:19,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 86 transitions, 756 flow [2023-11-17 12:01:19,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 86 transitions, 688 flow, removed 27 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:19,098 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 511 flow [2023-11-17 12:01:19,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=511, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2023-11-17 12:01:19,099 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 48 predicate places. [2023-11-17 12:01:19,099 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 511 flow [2023-11-17 12:01:19,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.833333333333333) internal successors, (70), 12 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:19,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:19,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:19,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:19,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 12:01:19,306 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:19,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:19,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1495103839, now seen corresponding path program 3 times [2023-11-17 12:01:19,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:19,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523262934] [2023-11-17 12:01:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:19,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:19,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523262934] [2023-11-17 12:01:19,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523262934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:19,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292061444] [2023-11-17 12:01:19,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:19,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:19,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:19,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:19,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 12:01:19,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:19,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:01:19,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:19,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:19,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292061444] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:19,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:19,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 12:01:19,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128828918] [2023-11-17 12:01:19,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:19,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:01:19,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:19,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:01:19,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:01:19,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:19,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 511 flow. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:19,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:19,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:19,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:20,107 INFO L124 PetriNetUnfolderBase]: 163/291 cut-off events. [2023-11-17 12:01:20,108 INFO L125 PetriNetUnfolderBase]: For 921/921 co-relation queries the response was YES. [2023-11-17 12:01:20,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1393 conditions, 291 events. 163/291 cut-off events. For 921/921 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1025 event pairs, 16 based on Foata normal form. 1/292 useless extension candidates. Maximal degree in co-relation 1367. Up to 189 conditions per place. [2023-11-17 12:01:20,111 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 62 selfloop transitions, 21 changer transitions 5/88 dead transitions. [2023-11-17 12:01:20,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 88 transitions, 774 flow [2023-11-17 12:01:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2023-11-17 12:01:20,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2023-11-17 12:01:20,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 69 transitions. [2023-11-17 12:01:20,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 69 transitions. [2023-11-17 12:01:20,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:20,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 69 transitions. [2023-11-17 12:01:20,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 12:01:20,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:20,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:20,115 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 511 flow. Second operand 7 states and 69 transitions. [2023-11-17 12:01:20,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 88 transitions, 774 flow [2023-11-17 12:01:20,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 740 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:20,123 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 553 flow [2023-11-17 12:01:20,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=553, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2023-11-17 12:01:20,124 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 52 predicate places. [2023-11-17 12:01:20,124 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 553 flow [2023-11-17 12:01:20,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:20,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:20,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:20,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:20,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:20,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:20,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:20,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1983342343, now seen corresponding path program 4 times [2023-11-17 12:01:20,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:20,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541617813] [2023-11-17 12:01:20,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:20,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:20,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:20,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541617813] [2023-11-17 12:01:20,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541617813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:20,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828155543] [2023-11-17 12:01:20,701 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:20,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:20,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:20,702 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:20,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 12:01:20,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:20,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:20,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:01:20,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:20,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:21,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828155543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:21,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:21,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:01:21,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871302028] [2023-11-17 12:01:21,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:21,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:21,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:21,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 553 flow. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 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 12:01:21,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:21,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:21,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:21,298 INFO L124 PetriNetUnfolderBase]: 186/332 cut-off events. [2023-11-17 12:01:21,299 INFO L125 PetriNetUnfolderBase]: For 1072/1072 co-relation queries the response was YES. [2023-11-17 12:01:21,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1617 conditions, 332 events. 186/332 cut-off events. For 1072/1072 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1228 event pairs, 16 based on Foata normal form. 1/333 useless extension candidates. Maximal degree in co-relation 1589. Up to 273 conditions per place. [2023-11-17 12:01:21,302 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 68 selfloop transitions, 19 changer transitions 5/92 dead transitions. [2023-11-17 12:01:21,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 868 flow [2023-11-17 12:01:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 59 transitions. [2023-11-17 12:01:21,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2023-11-17 12:01:21,303 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 59 transitions. [2023-11-17 12:01:21,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 59 transitions. [2023-11-17 12:01:21,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:21,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 59 transitions. [2023-11-17 12:01:21,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 8.428571428571429) internal successors, (59), 7 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:21,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:21,306 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:21,306 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 553 flow. Second operand 7 states and 59 transitions. [2023-11-17 12:01:21,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 868 flow [2023-11-17 12:01:21,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 92 transitions, 823 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:21,316 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 676 flow [2023-11-17 12:01:21,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=510, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=676, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2023-11-17 12:01:21,318 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 57 predicate places. [2023-11-17 12:01:21,318 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 676 flow [2023-11-17 12:01:21,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 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 12:01:21,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:21,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:21,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:21,525 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,SelfDestructingSolverStorable17 [2023-11-17 12:01:21,526 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:21,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 510759003, now seen corresponding path program 5 times [2023-11-17 12:01:21,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:21,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87631196] [2023-11-17 12:01:21,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:21,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:21,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:21,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87631196] [2023-11-17 12:01:21,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87631196] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:21,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122501628] [2023-11-17 12:01:21,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:21,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:21,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:21,729 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:21,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 12:01:21,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:01:21,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:21,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:01:21,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:21,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:22,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122501628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:22,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:22,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-17 12:01:22,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968869156] [2023-11-17 12:01:22,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:22,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:22,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:22,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:22,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:22,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:22,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 676 flow. Second operand has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 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 12:01:22,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:22,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:22,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:22,263 INFO L124 PetriNetUnfolderBase]: 200/360 cut-off events. [2023-11-17 12:01:22,264 INFO L125 PetriNetUnfolderBase]: For 1442/1442 co-relation queries the response was YES. [2023-11-17 12:01:22,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1861 conditions, 360 events. 200/360 cut-off events. For 1442/1442 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1363 event pairs, 16 based on Foata normal form. 1/361 useless extension candidates. Maximal degree in co-relation 1827. Up to 277 conditions per place. [2023-11-17 12:01:22,268 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 76 selfloop transitions, 20 changer transitions 5/101 dead transitions. [2023-11-17 12:01:22,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 101 transitions, 1010 flow [2023-11-17 12:01:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:22,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 65 transitions. [2023-11-17 12:01:22,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2023-11-17 12:01:22,270 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 65 transitions. [2023-11-17 12:01:22,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 65 transitions. [2023-11-17 12:01:22,270 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:22,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 65 transitions. [2023-11-17 12:01:22,271 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.285714285714286) internal successors, (65), 7 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 12:01:22,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:22,271 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:22,271 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 676 flow. Second operand 7 states and 65 transitions. [2023-11-17 12:01:22,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 101 transitions, 1010 flow [2023-11-17 12:01:22,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 963 flow, removed 20 selfloop flow, removed 2 redundant places. [2023-11-17 12:01:22,283 INFO L231 Difference]: Finished difference. Result has 83 places, 83 transitions, 747 flow [2023-11-17 12:01:22,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=747, PETRI_PLACES=83, PETRI_TRANSITIONS=83} [2023-11-17 12:01:22,285 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 63 predicate places. [2023-11-17 12:01:22,285 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 83 transitions, 747 flow [2023-11-17 12:01:22,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 6.166666666666667) internal successors, (74), 12 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 12:01:22,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:22,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:22,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:22,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:22,494 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:22,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:22,495 INFO L85 PathProgramCache]: Analyzing trace with hash 593875893, now seen corresponding path program 6 times [2023-11-17 12:01:22,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:22,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721113703] [2023-11-17 12:01:22,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:22,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:22,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:22,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721113703] [2023-11-17 12:01:22,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721113703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:22,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801607105] [2023-11-17 12:01:22,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:22,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:22,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:22,795 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:22,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 12:01:22,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:22,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:22,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-17 12:01:22,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:22,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:23,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:23,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801607105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:23,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:23,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-11-17 12:01:23,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815098372] [2023-11-17 12:01:23,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:23,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:01:23,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:23,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:01:23,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:01:23,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:23,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 83 transitions, 747 flow. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:23,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:23,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:23,282 INFO L124 PetriNetUnfolderBase]: 197/351 cut-off events. [2023-11-17 12:01:23,283 INFO L125 PetriNetUnfolderBase]: For 1701/1701 co-relation queries the response was YES. [2023-11-17 12:01:23,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1869 conditions, 351 events. 197/351 cut-off events. For 1701/1701 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1322 event pairs, 16 based on Foata normal form. 1/352 useless extension candidates. Maximal degree in co-relation 1835. Up to 277 conditions per place. [2023-11-17 12:01:23,287 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 74 selfloop transitions, 21 changer transitions 5/100 dead transitions. [2023-11-17 12:01:23,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 100 transitions, 1035 flow [2023-11-17 12:01:23,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:23,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:23,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2023-11-17 12:01:23,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-17 12:01:23,288 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 63 transitions. [2023-11-17 12:01:23,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 63 transitions. [2023-11-17 12:01:23,288 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:23,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 63 transitions. [2023-11-17 12:01:23,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,289 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,289 INFO L175 Difference]: Start difference. First operand has 83 places, 83 transitions, 747 flow. Second operand 7 states and 63 transitions. [2023-11-17 12:01:23,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 100 transitions, 1035 flow [2023-11-17 12:01:23,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 100 transitions, 965 flow, removed 26 selfloop flow, removed 3 redundant places. [2023-11-17 12:01:23,299 INFO L231 Difference]: Finished difference. Result has 88 places, 85 transitions, 773 flow [2023-11-17 12:01:23,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=691, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=773, PETRI_PLACES=88, PETRI_TRANSITIONS=85} [2023-11-17 12:01:23,300 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 68 predicate places. [2023-11-17 12:01:23,300 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 85 transitions, 773 flow [2023-11-17 12:01:23,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 14 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:23,300 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:23,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:23,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:23,506 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:23,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash 884718975, now seen corresponding path program 7 times [2023-11-17 12:01:23,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:23,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282473957] [2023-11-17 12:01:23,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:23,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:23,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:23,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282473957] [2023-11-17 12:01:23,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282473957] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:23,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880008634] [2023-11-17 12:01:23,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:23,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:23,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:23,578 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:23,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 12:01:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:23,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:23,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:23,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:23,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:23,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880008634] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:23,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:23,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:01:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113571465] [2023-11-17 12:01:23,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:23,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:23,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:23,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:23,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:23,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 85 transitions, 773 flow. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:23,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:23,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:23,979 INFO L124 PetriNetUnfolderBase]: 228/403 cut-off events. [2023-11-17 12:01:23,980 INFO L125 PetriNetUnfolderBase]: For 2220/2220 co-relation queries the response was YES. [2023-11-17 12:01:23,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2189 conditions, 403 events. 228/403 cut-off events. For 2220/2220 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1580 event pairs, 24 based on Foata normal form. 6/409 useless extension candidates. Maximal degree in co-relation 2149. Up to 108 conditions per place. [2023-11-17 12:01:23,983 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 84 selfloop transitions, 48 changer transitions 0/132 dead transitions. [2023-11-17 12:01:23,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1393 flow [2023-11-17 12:01:23,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 94 transitions. [2023-11-17 12:01:23,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47 [2023-11-17 12:01:23,985 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 94 transitions. [2023-11-17 12:01:23,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 94 transitions. [2023-11-17 12:01:23,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:23,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 94 transitions. [2023-11-17 12:01:23,985 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:23,986 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:23,986 INFO L175 Difference]: Start difference. First operand has 88 places, 85 transitions, 773 flow. Second operand 10 states and 94 transitions. [2023-11-17 12:01:23,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1393 flow [2023-11-17 12:01:23,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1324 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:23,994 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 1009 flow [2023-11-17 12:01:23,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1009, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2023-11-17 12:01:23,994 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 79 predicate places. [2023-11-17 12:01:23,994 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 1009 flow [2023-11-17 12:01:23,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:23,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:23,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:24,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:24,200 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,SelfDestructingSolverStorable20 [2023-11-17 12:01:24,200 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:24,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:24,201 INFO L85 PathProgramCache]: Analyzing trace with hash -932077050, now seen corresponding path program 8 times [2023-11-17 12:01:24,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:24,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810150436] [2023-11-17 12:01:24,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:24,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:24,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810150436] [2023-11-17 12:01:24,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810150436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:24,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503240741] [2023-11-17 12:01:24,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:24,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:24,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:24,279 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:24,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 12:01:24,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:24,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:24,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:24,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:24,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:24,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:24,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503240741] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:24,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:24,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:01:24,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94179033] [2023-11-17 12:01:24,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:24,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:24,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:24,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:24,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 1009 flow. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:24,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:24,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:24,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:24,534 INFO L124 PetriNetUnfolderBase]: 230/413 cut-off events. [2023-11-17 12:01:24,534 INFO L125 PetriNetUnfolderBase]: For 3393/3393 co-relation queries the response was YES. [2023-11-17 12:01:24,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2488 conditions, 413 events. 230/413 cut-off events. For 3393/3393 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1672 event pairs, 37 based on Foata normal form. 4/417 useless extension candidates. Maximal degree in co-relation 2406. Up to 183 conditions per place. [2023-11-17 12:01:24,538 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 79 selfloop transitions, 34 changer transitions 10/123 dead transitions. [2023-11-17 12:01:24,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 123 transitions, 1454 flow [2023-11-17 12:01:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 69 transitions. [2023-11-17 12:01:24,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4928571428571429 [2023-11-17 12:01:24,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 69 transitions. [2023-11-17 12:01:24,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 69 transitions. [2023-11-17 12:01:24,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:24,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 69 transitions. [2023-11-17 12:01:24,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 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 12:01:24,540 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:24,540 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:24,540 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 1009 flow. Second operand 7 states and 69 transitions. [2023-11-17 12:01:24,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 123 transitions, 1454 flow [2023-11-17 12:01:24,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 123 transitions, 1370 flow, removed 27 selfloop flow, removed 2 redundant places. [2023-11-17 12:01:24,551 INFO L231 Difference]: Finished difference. Result has 105 places, 94 transitions, 987 flow [2023-11-17 12:01:24,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=925, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=987, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2023-11-17 12:01:24,551 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 85 predicate places. [2023-11-17 12:01:24,551 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 987 flow [2023-11-17 12:01:24,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:24,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:24,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:24,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:24,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-17 12:01:24,758 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1185200517, now seen corresponding path program 9 times [2023-11-17 12:01:24,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:24,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837116447] [2023-11-17 12:01:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:24,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:24,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837116447] [2023-11-17 12:01:24,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837116447] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:24,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83965794] [2023-11-17 12:01:24,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:24,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:24,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:24,847 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:24,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 12:01:24,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:24,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:24,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:24,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:24,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:24,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83965794] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:24,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:24,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:24,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287730435] [2023-11-17 12:01:24,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:24,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:24,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:24,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:24,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:24,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:24,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 987 flow. Second operand has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:24,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:24,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:24,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:25,334 INFO L124 PetriNetUnfolderBase]: 272/473 cut-off events. [2023-11-17 12:01:25,334 INFO L125 PetriNetUnfolderBase]: For 4387/4387 co-relation queries the response was YES. [2023-11-17 12:01:25,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2890 conditions, 473 events. 272/473 cut-off events. For 4387/4387 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1906 event pairs, 31 based on Foata normal form. 14/487 useless extension candidates. Maximal degree in co-relation 2824. Up to 187 conditions per place. [2023-11-17 12:01:25,338 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 78 selfloop transitions, 73 changer transitions 0/151 dead transitions. [2023-11-17 12:01:25,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 151 transitions, 1818 flow [2023-11-17 12:01:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:01:25,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:01:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 130 transitions. [2023-11-17 12:01:25,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40625 [2023-11-17 12:01:25,339 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 130 transitions. [2023-11-17 12:01:25,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 130 transitions. [2023-11-17 12:01:25,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:25,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 130 transitions. [2023-11-17 12:01:25,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.125) internal successors, (130), 16 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,340 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,340 INFO L175 Difference]: Start difference. First operand has 105 places, 94 transitions, 987 flow. Second operand 16 states and 130 transitions. [2023-11-17 12:01:25,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 151 transitions, 1818 flow [2023-11-17 12:01:25,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 151 transitions, 1737 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-11-17 12:01:25,350 INFO L231 Difference]: Finished difference. Result has 120 places, 120 transitions, 1515 flow [2023-11-17 12:01:25,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1515, PETRI_PLACES=120, PETRI_TRANSITIONS=120} [2023-11-17 12:01:25,351 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 100 predicate places. [2023-11-17 12:01:25,351 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 120 transitions, 1515 flow [2023-11-17 12:01:25,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.166666666666667) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:25,352 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:25,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:25,557 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,SelfDestructingSolverStorable22 [2023-11-17 12:01:25,557 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:25,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1871933119, now seen corresponding path program 10 times [2023-11-17 12:01:25,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:25,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151465284] [2023-11-17 12:01:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:25,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:25,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:25,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151465284] [2023-11-17 12:01:25,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151465284] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741363670] [2023-11-17 12:01:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:25,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:25,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:25,626 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:25,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 12:01:25,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:25,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:25,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:25,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:25,741 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:25,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:25,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:25,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741363670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:25,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:25,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:25,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954603701] [2023-11-17 12:01:25,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:25,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:25,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:25,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:25,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:25,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 120 transitions, 1515 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:25,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:25,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:25,991 INFO L124 PetriNetUnfolderBase]: 272/477 cut-off events. [2023-11-17 12:01:25,992 INFO L125 PetriNetUnfolderBase]: For 5261/5261 co-relation queries the response was YES. [2023-11-17 12:01:25,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3291 conditions, 477 events. 272/477 cut-off events. For 5261/5261 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 1941 event pairs, 44 based on Foata normal form. 4/481 useless extension candidates. Maximal degree in co-relation 3198. Up to 228 conditions per place. [2023-11-17 12:01:25,997 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 80 selfloop transitions, 63 changer transitions 2/145 dead transitions. [2023-11-17 12:01:25,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 145 transitions, 2005 flow [2023-11-17 12:01:25,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:01:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:01:25,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 101 transitions. [2023-11-17 12:01:25,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38846153846153847 [2023-11-17 12:01:25,998 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 101 transitions. [2023-11-17 12:01:25,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 101 transitions. [2023-11-17 12:01:25,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:25,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 101 transitions. [2023-11-17 12:01:25,998 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 7.769230769230769) internal successors, (101), 13 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,999 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:25,999 INFO L175 Difference]: Start difference. First operand has 120 places, 120 transitions, 1515 flow. Second operand 13 states and 101 transitions. [2023-11-17 12:01:25,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 145 transitions, 2005 flow [2023-11-17 12:01:26,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 145 transitions, 1742 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-11-17 12:01:26,020 INFO L231 Difference]: Finished difference. Result has 129 places, 120 transitions, 1386 flow [2023-11-17 12:01:26,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1386, PETRI_PLACES=129, PETRI_TRANSITIONS=120} [2023-11-17 12:01:26,021 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 109 predicate places. [2023-11-17 12:01:26,021 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 120 transitions, 1386 flow [2023-11-17 12:01:26,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:26,021 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:26,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:26,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:26,227 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:26,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -317625054, now seen corresponding path program 11 times [2023-11-17 12:01:26,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:26,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756305627] [2023-11-17 12:01:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:26,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:26,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:26,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756305627] [2023-11-17 12:01:26,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756305627] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:26,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374809128] [2023-11-17 12:01:26,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:26,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:26,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:26,291 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:26,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 12:01:26,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:26,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:26,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:26,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:26,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:26,421 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:26,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:26,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374809128] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:26,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:26,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:26,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247766764] [2023-11-17 12:01:26,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:26,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:26,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:26,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:26,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:26,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:26,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 120 transitions, 1386 flow. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:26,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:26,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:26,697 INFO L124 PetriNetUnfolderBase]: 320/553 cut-off events. [2023-11-17 12:01:26,697 INFO L125 PetriNetUnfolderBase]: For 7307/7307 co-relation queries the response was YES. [2023-11-17 12:01:26,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3810 conditions, 553 events. 320/553 cut-off events. For 7307/7307 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2305 event pairs, 62 based on Foata normal form. 16/569 useless extension candidates. Maximal degree in co-relation 3746. Up to 358 conditions per place. [2023-11-17 12:01:26,702 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 105 selfloop transitions, 65 changer transitions 2/172 dead transitions. [2023-11-17 12:01:26,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 172 transitions, 2358 flow [2023-11-17 12:01:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:01:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:01:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 102 transitions. [2023-11-17 12:01:26,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-11-17 12:01:26,703 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 102 transitions. [2023-11-17 12:01:26,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 102 transitions. [2023-11-17 12:01:26,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:26,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 102 transitions. [2023-11-17 12:01:26,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,704 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,704 INFO L175 Difference]: Start difference. First operand has 129 places, 120 transitions, 1386 flow. Second operand 12 states and 102 transitions. [2023-11-17 12:01:26,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 172 transitions, 2358 flow [2023-11-17 12:01:26,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 172 transitions, 2236 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-17 12:01:26,723 INFO L231 Difference]: Finished difference. Result has 135 places, 144 transitions, 1917 flow [2023-11-17 12:01:26,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1283, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1917, PETRI_PLACES=135, PETRI_TRANSITIONS=144} [2023-11-17 12:01:26,724 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 115 predicate places. [2023-11-17 12:01:26,724 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 144 transitions, 1917 flow [2023-11-17 12:01:26,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:26,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:26,724 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:26,731 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 12:01:26,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:26,929 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:26,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:26,930 INFO L85 PathProgramCache]: Analyzing trace with hash -8667563, now seen corresponding path program 12 times [2023-11-17 12:01:26,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:26,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261640563] [2023-11-17 12:01:26,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:26,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:26,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:26,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261640563] [2023-11-17 12:01:26,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261640563] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:26,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031491975] [2023-11-17 12:01:26,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:26,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:26,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:26,988 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 12:01:27,013 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 12:01:27,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:27,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:27,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:27,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:27,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031491975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:27,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:27,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:01:27,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161919138] [2023-11-17 12:01:27,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:27,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:27,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:27,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:27,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:27,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:27,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 144 transitions, 1917 flow. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:27,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:27,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:27,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:27,460 INFO L124 PetriNetUnfolderBase]: 377/648 cut-off events. [2023-11-17 12:01:27,460 INFO L125 PetriNetUnfolderBase]: For 9490/9490 co-relation queries the response was YES. [2023-11-17 12:01:27,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4579 conditions, 648 events. 377/648 cut-off events. For 9490/9490 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 2733 event pairs, 38 based on Foata normal form. 10/658 useless extension candidates. Maximal degree in co-relation 4474. Up to 256 conditions per place. [2023-11-17 12:01:27,469 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 118 selfloop transitions, 81 changer transitions 0/199 dead transitions. [2023-11-17 12:01:27,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 199 transitions, 2755 flow [2023-11-17 12:01:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:01:27,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:01:27,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 113 transitions. [2023-11-17 12:01:27,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035714285714286 [2023-11-17 12:01:27,470 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 113 transitions. [2023-11-17 12:01:27,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 113 transitions. [2023-11-17 12:01:27,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:27,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 113 transitions. [2023-11-17 12:01:27,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.071428571428571) internal successors, (113), 14 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:27,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:27,472 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:27,472 INFO L175 Difference]: Start difference. First operand has 135 places, 144 transitions, 1917 flow. Second operand 14 states and 113 transitions. [2023-11-17 12:01:27,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 199 transitions, 2755 flow [2023-11-17 12:01:27,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 199 transitions, 2436 flow, removed 120 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:27,508 INFO L231 Difference]: Finished difference. Result has 149 places, 168 transitions, 2094 flow [2023-11-17 12:01:27,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2094, PETRI_PLACES=149, PETRI_TRANSITIONS=168} [2023-11-17 12:01:27,509 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 129 predicate places. [2023-11-17 12:01:27,509 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 168 transitions, 2094 flow [2023-11-17 12:01:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 13 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:27,509 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:27,535 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 12:01:27,714 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,SelfDestructingSolverStorable25 [2023-11-17 12:01:27,715 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:27,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:27,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1645884578, now seen corresponding path program 13 times [2023-11-17 12:01:27,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:27,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54443764] [2023-11-17 12:01:27,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:27,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:27,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:27,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54443764] [2023-11-17 12:01:27,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54443764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:27,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267154620] [2023-11-17 12:01:27,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:27,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:27,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:27,790 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 12:01:27,793 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 12:01:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:27,871 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:27,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:27,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:27,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267154620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:27,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:27,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:27,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029324725] [2023-11-17 12:01:27,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:27,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:27,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:27,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:27,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:27,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 168 transitions, 2094 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:27,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:27,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:27,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:28,219 INFO L124 PetriNetUnfolderBase]: 379/652 cut-off events. [2023-11-17 12:01:28,219 INFO L125 PetriNetUnfolderBase]: For 8547/8547 co-relation queries the response was YES. [2023-11-17 12:01:28,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4545 conditions, 652 events. 379/652 cut-off events. For 8547/8547 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2740 event pairs, 80 based on Foata normal form. 8/660 useless extension candidates. Maximal degree in co-relation 4436. Up to 470 conditions per place. [2023-11-17 12:01:28,226 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 127 selfloop transitions, 71 changer transitions 0/198 dead transitions. [2023-11-17 12:01:28,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 198 transitions, 2711 flow [2023-11-17 12:01:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:28,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 130 transitions. [2023-11-17 12:01:28,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38235294117647056 [2023-11-17 12:01:28,227 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 130 transitions. [2023-11-17 12:01:28,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 130 transitions. [2023-11-17 12:01:28,228 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:28,228 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 130 transitions. [2023-11-17 12:01:28,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.647058823529412) internal successors, (130), 17 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:28,230 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:28,230 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:28,230 INFO L175 Difference]: Start difference. First operand has 149 places, 168 transitions, 2094 flow. Second operand 17 states and 130 transitions. [2023-11-17 12:01:28,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 198 transitions, 2711 flow [2023-11-17 12:01:28,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 198 transitions, 2568 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-11-17 12:01:28,282 INFO L231 Difference]: Finished difference. Result has 163 places, 174 transitions, 2209 flow [2023-11-17 12:01:28,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2209, PETRI_PLACES=163, PETRI_TRANSITIONS=174} [2023-11-17 12:01:28,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 143 predicate places. [2023-11-17 12:01:28,283 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 174 transitions, 2209 flow [2023-11-17 12:01:28,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:28,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:28,284 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:28,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:28,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 12:01:28,491 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:28,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1053239682, now seen corresponding path program 14 times [2023-11-17 12:01:28,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203646514] [2023-11-17 12:01:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:28,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203646514] [2023-11-17 12:01:28,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203646514] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:28,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225811519] [2023-11-17 12:01:28,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:28,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:28,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:28,567 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 12:01:28,604 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 12:01:28,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:28,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:28,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:28,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:28,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:28,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:28,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225811519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:28,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:28,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:01:28,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859056210] [2023-11-17 12:01:28,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:28,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:28,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:28,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 174 transitions, 2209 flow. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:01:28,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:28,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:28,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:29,018 INFO L124 PetriNetUnfolderBase]: 378/655 cut-off events. [2023-11-17 12:01:29,019 INFO L125 PetriNetUnfolderBase]: For 8297/8297 co-relation queries the response was YES. [2023-11-17 12:01:29,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4589 conditions, 655 events. 378/655 cut-off events. For 8297/8297 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2774 event pairs, 85 based on Foata normal form. 4/659 useless extension candidates. Maximal degree in co-relation 4472. Up to 485 conditions per place. [2023-11-17 12:01:29,028 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 137 selfloop transitions, 47 changer transitions 10/194 dead transitions. [2023-11-17 12:01:29,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 194 transitions, 2717 flow [2023-11-17 12:01:29,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:29,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:29,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 83 transitions. [2023-11-17 12:01:29,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.415 [2023-11-17 12:01:29,029 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 83 transitions. [2023-11-17 12:01:29,029 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 83 transitions. [2023-11-17 12:01:29,029 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:29,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 83 transitions. [2023-11-17 12:01:29,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.3) internal successors, (83), 10 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,030 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:29,030 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:29,030 INFO L175 Difference]: Start difference. First operand has 163 places, 174 transitions, 2209 flow. Second operand 10 states and 83 transitions. [2023-11-17 12:01:29,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 194 transitions, 2717 flow [2023-11-17 12:01:29,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 194 transitions, 2498 flow, removed 42 selfloop flow, removed 11 redundant places. [2023-11-17 12:01:29,065 INFO L231 Difference]: Finished difference. Result has 162 places, 170 transitions, 2026 flow [2023-11-17 12:01:29,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1991, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2026, PETRI_PLACES=162, PETRI_TRANSITIONS=170} [2023-11-17 12:01:29,065 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 142 predicate places. [2023-11-17 12:01:29,065 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 170 transitions, 2026 flow [2023-11-17 12:01:29,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 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 12:01:29,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:29,066 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:29,085 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 12:01:29,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 12:01:29,271 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:29,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:29,271 INFO L85 PathProgramCache]: Analyzing trace with hash 205735131, now seen corresponding path program 15 times [2023-11-17 12:01:29,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:29,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095280576] [2023-11-17 12:01:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:29,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:29,326 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:29,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095280576] [2023-11-17 12:01:29,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095280576] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:29,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510469826] [2023-11-17 12:01:29,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:29,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:29,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:29,343 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 12:01:29,359 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 12:01:29,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:01:29,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:29,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:29,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:29,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:29,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:29,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:29,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510469826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:29,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:29,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:01:29,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586156431] [2023-11-17 12:01:29,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:29,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:29,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:29,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:29,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:29,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:29,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 170 transitions, 2026 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 12:01:29,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:29,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:29,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:29,846 INFO L124 PetriNetUnfolderBase]: 490/829 cut-off events. [2023-11-17 12:01:29,846 INFO L125 PetriNetUnfolderBase]: For 12623/12623 co-relation queries the response was YES. [2023-11-17 12:01:29,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5801 conditions, 829 events. 490/829 cut-off events. For 12623/12623 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3624 event pairs, 42 based on Foata normal form. 14/843 useless extension candidates. Maximal degree in co-relation 5680. Up to 310 conditions per place. [2023-11-17 12:01:29,860 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 103 selfloop transitions, 153 changer transitions 0/256 dead transitions. [2023-11-17 12:01:29,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 256 transitions, 3575 flow [2023-11-17 12:01:29,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:29,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 137 transitions. [2023-11-17 12:01:29,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40294117647058825 [2023-11-17 12:01:29,862 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 137 transitions. [2023-11-17 12:01:29,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 137 transitions. [2023-11-17 12:01:29,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:29,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 137 transitions. [2023-11-17 12:01:29,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.058823529411764) internal successors, (137), 17 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,864 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:29,864 INFO L175 Difference]: Start difference. First operand has 162 places, 170 transitions, 2026 flow. Second operand 17 states and 137 transitions. [2023-11-17 12:01:29,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 256 transitions, 3575 flow [2023-11-17 12:01:29,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 256 transitions, 3458 flow, removed 3 selfloop flow, removed 9 redundant places. [2023-11-17 12:01:29,900 INFO L231 Difference]: Finished difference. Result has 175 places, 226 transitions, 3301 flow [2023-11-17 12:01:29,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=1921, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3301, PETRI_PLACES=175, PETRI_TRANSITIONS=226} [2023-11-17 12:01:29,902 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-11-17 12:01:29,902 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 226 transitions, 3301 flow [2023-11-17 12:01:29,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 12:01:29,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:29,902 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:29,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-17 12:01:30,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 12:01:30,107 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:30,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1360451901, now seen corresponding path program 16 times [2023-11-17 12:01:30,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:30,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522225759] [2023-11-17 12:01:30,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:30,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:30,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:30,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522225759] [2023-11-17 12:01:30,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522225759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:30,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635342893] [2023-11-17 12:01:30,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:30,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:30,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:30,179 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 12:01:30,191 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 12:01:30,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:30,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:30,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:30,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:30,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:30,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:30,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635342893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:30,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:30,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:01:30,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819079771] [2023-11-17 12:01:30,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:30,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:30,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:30,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:30,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:30,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 226 transitions, 3301 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 12:01:30,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:30,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:30,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:30,557 INFO L124 PetriNetUnfolderBase]: 490/833 cut-off events. [2023-11-17 12:01:30,557 INFO L125 PetriNetUnfolderBase]: For 14443/14443 co-relation queries the response was YES. [2023-11-17 12:01:30,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6582 conditions, 833 events. 490/833 cut-off events. For 14443/14443 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3704 event pairs, 63 based on Foata normal form. 4/837 useless extension candidates. Maximal degree in co-relation 6454. Up to 397 conditions per place. [2023-11-17 12:01:30,566 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 119 selfloop transitions, 129 changer transitions 2/250 dead transitions. [2023-11-17 12:01:30,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 250 transitions, 4026 flow [2023-11-17 12:01:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:01:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:01:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 109 transitions. [2023-11-17 12:01:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2023-11-17 12:01:30,567 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 109 transitions. [2023-11-17 12:01:30,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 109 transitions. [2023-11-17 12:01:30,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:30,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 109 transitions. [2023-11-17 12:01:30,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:30,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:30,568 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:30,568 INFO L175 Difference]: Start difference. First operand has 175 places, 226 transitions, 3301 flow. Second operand 14 states and 109 transitions. [2023-11-17 12:01:30,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 250 transitions, 4026 flow [2023-11-17 12:01:30,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 250 transitions, 3680 flow, removed 155 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:30,627 INFO L231 Difference]: Finished difference. Result has 186 places, 226 transitions, 3224 flow [2023-11-17 12:01:30,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2955, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3224, PETRI_PLACES=186, PETRI_TRANSITIONS=226} [2023-11-17 12:01:30,628 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 166 predicate places. [2023-11-17 12:01:30,628 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 226 transitions, 3224 flow [2023-11-17 12:01:30,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 12:01:30,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:30,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:30,636 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 12:01:30,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:30,833 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:30,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:30,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1445110399, now seen corresponding path program 17 times [2023-11-17 12:01:30,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:30,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136550952] [2023-11-17 12:01:30,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:30,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:30,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:30,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136550952] [2023-11-17 12:01:30,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136550952] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622837141] [2023-11-17 12:01:30,891 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:30,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:30,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:30,892 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 12:01:30,927 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 12:01:31,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:31,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:31,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:31,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:31,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:31,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622837141] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:31,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:31,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:01:31,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296348769] [2023-11-17 12:01:31,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:31,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:01:31,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:31,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:01:31,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:01:31,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:31,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 226 transitions, 3224 flow. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:31,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:31,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:31,357 INFO L124 PetriNetUnfolderBase]: 532/895 cut-off events. [2023-11-17 12:01:31,358 INFO L125 PetriNetUnfolderBase]: For 14318/14318 co-relation queries the response was YES. [2023-11-17 12:01:31,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6935 conditions, 895 events. 532/895 cut-off events. For 14318/14318 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4002 event pairs, 65 based on Foata normal form. 4/899 useless extension candidates. Maximal degree in co-relation 6846. Up to 413 conditions per place. [2023-11-17 12:01:31,368 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 132 selfloop transitions, 139 changer transitions 4/275 dead transitions. [2023-11-17 12:01:31,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 275 transitions, 4361 flow [2023-11-17 12:01:31,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:01:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:01:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 112 transitions. [2023-11-17 12:01:31,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2023-11-17 12:01:31,369 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 112 transitions. [2023-11-17 12:01:31,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 112 transitions. [2023-11-17 12:01:31,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:31,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 112 transitions. [2023-11-17 12:01:31,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.466666666666667) internal successors, (112), 15 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,370 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,370 INFO L175 Difference]: Start difference. First operand has 186 places, 226 transitions, 3224 flow. Second operand 15 states and 112 transitions. [2023-11-17 12:01:31,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 275 transitions, 4361 flow [2023-11-17 12:01:31,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 275 transitions, 4075 flow, removed 18 selfloop flow, removed 11 redundant places. [2023-11-17 12:01:31,429 INFO L231 Difference]: Finished difference. Result has 193 places, 247 transitions, 3666 flow [2023-11-17 12:01:31,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=2988, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3666, PETRI_PLACES=193, PETRI_TRANSITIONS=247} [2023-11-17 12:01:31,430 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 173 predicate places. [2023-11-17 12:01:31,430 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 247 transitions, 3666 flow [2023-11-17 12:01:31,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 15 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:31,430 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:31,437 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 12:01:31,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:31,635 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:31,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:31,636 INFO L85 PathProgramCache]: Analyzing trace with hash -790666815, now seen corresponding path program 18 times [2023-11-17 12:01:31,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:31,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631489165] [2023-11-17 12:01:31,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:31,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:31,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:31,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:31,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631489165] [2023-11-17 12:01:31,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631489165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:31,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640118341] [2023-11-17 12:01:31,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:31,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:31,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:31,709 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 12:01:31,725 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 12:01:31,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:31,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:31,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:31,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:31,843 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:31,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640118341] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:31,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:31,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:01:31,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558531539] [2023-11-17 12:01:31,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:31,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:01:31,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:01:31,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:01:31,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:31,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 247 transitions, 3666 flow. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:31,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:31,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:31,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:32,362 INFO L124 PetriNetUnfolderBase]: 641/1082 cut-off events. [2023-11-17 12:01:32,362 INFO L125 PetriNetUnfolderBase]: For 20231/20231 co-relation queries the response was YES. [2023-11-17 12:01:32,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8617 conditions, 1082 events. 641/1082 cut-off events. For 20231/20231 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 5067 event pairs, 47 based on Foata normal form. 10/1092 useless extension candidates. Maximal degree in co-relation 8522. Up to 361 conditions per place. [2023-11-17 12:01:32,370 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 171 selfloop transitions, 170 changer transitions 0/341 dead transitions. [2023-11-17 12:01:32,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 341 transitions, 5461 flow [2023-11-17 12:01:32,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:01:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:01:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 175 transitions. [2023-11-17 12:01:32,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804347826086957 [2023-11-17 12:01:32,372 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 175 transitions. [2023-11-17 12:01:32,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 175 transitions. [2023-11-17 12:01:32,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:32,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 175 transitions. [2023-11-17 12:01:32,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.608695652173913) internal successors, (175), 23 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 12:01:32,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,373 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,373 INFO L175 Difference]: Start difference. First operand has 193 places, 247 transitions, 3666 flow. Second operand 23 states and 175 transitions. [2023-11-17 12:01:32,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 341 transitions, 5461 flow [2023-11-17 12:01:32,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 341 transitions, 5256 flow, removed 32 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:32,443 INFO L231 Difference]: Finished difference. Result has 213 places, 297 transitions, 4811 flow [2023-11-17 12:01:32,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=3484, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=4811, PETRI_PLACES=213, PETRI_TRANSITIONS=297} [2023-11-17 12:01:32,444 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 193 predicate places. [2023-11-17 12:01:32,444 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 297 transitions, 4811 flow [2023-11-17 12:01:32,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:32,444 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:32,449 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 12:01:32,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:32,669 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:32,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1992769076, now seen corresponding path program 19 times [2023-11-17 12:01:32,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:32,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795914527] [2023-11-17 12:01:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:32,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:32,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:32,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:32,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795914527] [2023-11-17 12:01:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795914527] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:32,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946199704] [2023-11-17 12:01:32,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:32,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:32,754 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 12:01:32,773 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 12:01:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:32,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:32,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:32,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:32,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946199704] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:32,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:32,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:01:32,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247128743] [2023-11-17 12:01:32,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:32,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:01:32,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:32,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:01:32,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:01:32,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:32,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 297 transitions, 4811 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:32,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:32,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:32,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:33,434 INFO L124 PetriNetUnfolderBase]: 670/1133 cut-off events. [2023-11-17 12:01:33,435 INFO L125 PetriNetUnfolderBase]: For 28994/28994 co-relation queries the response was YES. [2023-11-17 12:01:33,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9982 conditions, 1133 events. 670/1133 cut-off events. For 28994/28994 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5401 event pairs, 40 based on Foata normal form. 20/1153 useless extension candidates. Maximal degree in co-relation 9834. Up to 712 conditions per place. [2023-11-17 12:01:33,458 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 261 selfloop transitions, 88 changer transitions 7/356 dead transitions. [2023-11-17 12:01:33,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 356 transitions, 6521 flow [2023-11-17 12:01:33,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 139 transitions. [2023-11-17 12:01:33,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088235294117647 [2023-11-17 12:01:33,459 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 139 transitions. [2023-11-17 12:01:33,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 139 transitions. [2023-11-17 12:01:33,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:33,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 139 transitions. [2023-11-17 12:01:33,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.176470588235293) internal successors, (139), 17 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:33,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:33,461 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:33,461 INFO L175 Difference]: Start difference. First operand has 213 places, 297 transitions, 4811 flow. Second operand 17 states and 139 transitions. [2023-11-17 12:01:33,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 356 transitions, 6521 flow [2023-11-17 12:01:33,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 356 transitions, 6315 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-11-17 12:01:33,658 INFO L231 Difference]: Finished difference. Result has 224 places, 313 transitions, 5465 flow [2023-11-17 12:01:33,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4593, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=5465, PETRI_PLACES=224, PETRI_TRANSITIONS=313} [2023-11-17 12:01:33,659 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2023-11-17 12:01:33,659 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 313 transitions, 5465 flow [2023-11-17 12:01:33,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:33,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:33,660 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:33,669 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 12:01:33,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:33,866 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:33,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:33,867 INFO L85 PathProgramCache]: Analyzing trace with hash 290356023, now seen corresponding path program 20 times [2023-11-17 12:01:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:33,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407359889] [2023-11-17 12:01:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:33,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:33,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407359889] [2023-11-17 12:01:33,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407359889] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:33,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552214932] [2023-11-17 12:01:33,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:33,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:33,961 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 12:01:33,979 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 12:01:34,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:34,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:34,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:34,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:34,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:34,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:01:34,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552214932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:34,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:34,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:01:34,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246127220] [2023-11-17 12:01:34,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:34,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:34,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:34,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:34,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:34,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:34,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 313 transitions, 5465 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 12:01:34,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:34,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:34,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:34,609 INFO L124 PetriNetUnfolderBase]: 713/1188 cut-off events. [2023-11-17 12:01:34,610 INFO L125 PetriNetUnfolderBase]: For 42631/42631 co-relation queries the response was YES. [2023-11-17 12:01:34,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11172 conditions, 1188 events. 713/1188 cut-off events. For 42631/42631 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5585 event pairs, 157 based on Foata normal form. 26/1214 useless extension candidates. Maximal degree in co-relation 11049. Up to 1041 conditions per place. [2023-11-17 12:01:34,631 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 309 selfloop transitions, 54 changer transitions 0/363 dead transitions. [2023-11-17 12:01:34,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 363 transitions, 7276 flow [2023-11-17 12:01:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:01:34,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:01:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 112 transitions. [2023-11-17 12:01:34,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 12:01:34,633 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 112 transitions. [2023-11-17 12:01:34,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 112 transitions. [2023-11-17 12:01:34,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:34,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 112 transitions. [2023-11-17 12:01:34,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 8.0) internal successors, (112), 14 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:34,634 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:34,634 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:34,634 INFO L175 Difference]: Start difference. First operand has 224 places, 313 transitions, 5465 flow. Second operand 14 states and 112 transitions. [2023-11-17 12:01:34,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 363 transitions, 7276 flow [2023-11-17 12:01:34,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 363 transitions, 6288 flow, removed 436 selfloop flow, removed 12 redundant places. [2023-11-17 12:01:34,836 INFO L231 Difference]: Finished difference. Result has 227 places, 337 transitions, 5531 flow [2023-11-17 12:01:34,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=4772, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5531, PETRI_PLACES=227, PETRI_TRANSITIONS=337} [2023-11-17 12:01:34,837 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 207 predicate places. [2023-11-17 12:01:34,837 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 337 transitions, 5531 flow [2023-11-17 12:01:34,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 12:01:34,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:34,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:34,845 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 12:01:35,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:35,042 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:35,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:35,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1197975499, now seen corresponding path program 21 times [2023-11-17 12:01:35,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:35,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797923698] [2023-11-17 12:01:35,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:35,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:35,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:35,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:35,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797923698] [2023-11-17 12:01:35,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797923698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:35,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186246670] [2023-11-17 12:01:35,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:35,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:35,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:35,133 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 12:01:35,150 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 12:01:35,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:35,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:35,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:35,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:35,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:35,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186246670] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:35,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:35,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:01:35,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92502233] [2023-11-17 12:01:35,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:35,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:01:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:35,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:01:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:01:35,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:35,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 337 transitions, 5531 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:35,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:35,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:35,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:35,841 INFO L124 PetriNetUnfolderBase]: 769/1272 cut-off events. [2023-11-17 12:01:35,842 INFO L125 PetriNetUnfolderBase]: For 35768/35768 co-relation queries the response was YES. [2023-11-17 12:01:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11293 conditions, 1272 events. 769/1272 cut-off events. For 35768/35768 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6051 event pairs, 166 based on Foata normal form. 10/1282 useless extension candidates. Maximal degree in co-relation 11133. Up to 1078 conditions per place. [2023-11-17 12:01:35,860 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 306 selfloop transitions, 80 changer transitions 4/390 dead transitions. [2023-11-17 12:01:35,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 390 transitions, 7371 flow [2023-11-17 12:01:35,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:01:35,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:01:35,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 117 transitions. [2023-11-17 12:01:35,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.365625 [2023-11-17 12:01:35,862 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 117 transitions. [2023-11-17 12:01:35,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 117 transitions. [2023-11-17 12:01:35,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:35,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 117 transitions. [2023-11-17 12:01:35,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:35,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:35,863 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:35,863 INFO L175 Difference]: Start difference. First operand has 227 places, 337 transitions, 5531 flow. Second operand 16 states and 117 transitions. [2023-11-17 12:01:35,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 390 transitions, 7371 flow [2023-11-17 12:01:36,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 390 transitions, 6908 flow, removed 182 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:36,047 INFO L231 Difference]: Finished difference. Result has 243 places, 364 transitions, 6137 flow [2023-11-17 12:01:36,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5074, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6137, PETRI_PLACES=243, PETRI_TRANSITIONS=364} [2023-11-17 12:01:36,048 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 223 predicate places. [2023-11-17 12:01:36,048 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 364 transitions, 6137 flow [2023-11-17 12:01:36,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:36,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:36,049 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:36,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:36,255 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,SelfDestructingSolverStorable34 [2023-11-17 12:01:36,255 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:36,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:36,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1243717465, now seen corresponding path program 22 times [2023-11-17 12:01:36,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:36,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771028647] [2023-11-17 12:01:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:36,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:36,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:36,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:36,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771028647] [2023-11-17 12:01:36,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771028647] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:36,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412663697] [2023-11-17 12:01:36,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:36,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:36,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:36,351 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 12:01:36,353 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 12:01:36,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:36,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:36,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:36,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:36,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:36,526 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:36,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412663697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:36,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:36,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:36,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342304565] [2023-11-17 12:01:36,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:36,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:36,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:36,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:36,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:36,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 364 transitions, 6137 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:36,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:36,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:36,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:36,989 INFO L124 PetriNetUnfolderBase]: 827/1352 cut-off events. [2023-11-17 12:01:36,989 INFO L125 PetriNetUnfolderBase]: For 54245/54245 co-relation queries the response was YES. [2023-11-17 12:01:36,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12552 conditions, 1352 events. 827/1352 cut-off events. For 54245/54245 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6446 event pairs, 98 based on Foata normal form. 16/1368 useless extension candidates. Maximal degree in co-relation 12387. Up to 850 conditions per place. [2023-11-17 12:01:37,004 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 257 selfloop transitions, 166 changer transitions 0/423 dead transitions. [2023-11-17 12:01:37,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 423 transitions, 8108 flow [2023-11-17 12:01:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:01:37,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:01:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 131 transitions. [2023-11-17 12:01:37,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.409375 [2023-11-17 12:01:37,006 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 131 transitions. [2023-11-17 12:01:37,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 131 transitions. [2023-11-17 12:01:37,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:37,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 131 transitions. [2023-11-17 12:01:37,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 8.1875) internal successors, (131), 16 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:37,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:37,008 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:37,008 INFO L175 Difference]: Start difference. First operand has 243 places, 364 transitions, 6137 flow. Second operand 16 states and 131 transitions. [2023-11-17 12:01:37,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 423 transitions, 8108 flow [2023-11-17 12:01:37,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 423 transitions, 7645 flow, removed 211 selfloop flow, removed 6 redundant places. [2023-11-17 12:01:37,208 INFO L231 Difference]: Finished difference. Result has 254 places, 392 transitions, 6982 flow [2023-11-17 12:01:37,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=5616, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6982, PETRI_PLACES=254, PETRI_TRANSITIONS=392} [2023-11-17 12:01:37,209 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 234 predicate places. [2023-11-17 12:01:37,209 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 392 transitions, 6982 flow [2023-11-17 12:01:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:37,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:37,209 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:37,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:37,415 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,SelfDestructingSolverStorable35 [2023-11-17 12:01:37,415 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:37,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:37,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1410010463, now seen corresponding path program 23 times [2023-11-17 12:01:37,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:37,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118484702] [2023-11-17 12:01:37,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:37,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:37,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:37,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118484702] [2023-11-17 12:01:37,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118484702] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:37,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087917805] [2023-11-17 12:01:37,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:37,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:37,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:37,510 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 12:01:37,525 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 12:01:37,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:37,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:37,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:37,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:37,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:37,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:37,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087917805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:37,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:37,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:37,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588287219] [2023-11-17 12:01:37,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:37,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:37,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:37,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:37,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 392 transitions, 6982 flow. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:37,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:37,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:37,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:38,130 INFO L124 PetriNetUnfolderBase]: 824/1351 cut-off events. [2023-11-17 12:01:38,130 INFO L125 PetriNetUnfolderBase]: For 46134/46134 co-relation queries the response was YES. [2023-11-17 12:01:38,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12892 conditions, 1351 events. 824/1351 cut-off events. For 46134/46134 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6465 event pairs, 95 based on Foata normal form. 6/1357 useless extension candidates. Maximal degree in co-relation 12665. Up to 845 conditions per place. [2023-11-17 12:01:38,142 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 250 selfloop transitions, 159 changer transitions 3/412 dead transitions. [2023-11-17 12:01:38,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 412 transitions, 8157 flow [2023-11-17 12:01:38,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:01:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:01:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 97 transitions. [2023-11-17 12:01:38,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2023-11-17 12:01:38,143 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 97 transitions. [2023-11-17 12:01:38,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 97 transitions. [2023-11-17 12:01:38,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:38,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 97 transitions. [2023-11-17 12:01:38,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 8.083333333333334) internal successors, (97), 12 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,145 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,145 INFO L175 Difference]: Start difference. First operand has 254 places, 392 transitions, 6982 flow. Second operand 12 states and 97 transitions. [2023-11-17 12:01:38,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 412 transitions, 8157 flow [2023-11-17 12:01:38,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 412 transitions, 7596 flow, removed 264 selfloop flow, removed 6 redundant places. [2023-11-17 12:01:38,330 INFO L231 Difference]: Finished difference. Result has 259 places, 389 transitions, 6753 flow [2023-11-17 12:01:38,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6395, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6753, PETRI_PLACES=259, PETRI_TRANSITIONS=389} [2023-11-17 12:01:38,330 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 239 predicate places. [2023-11-17 12:01:38,330 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 389 transitions, 6753 flow [2023-11-17 12:01:38,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:38,330 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:38,335 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 12:01:38,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 12:01:38,535 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:38,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash 222409055, now seen corresponding path program 24 times [2023-11-17 12:01:38,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:38,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654537985] [2023-11-17 12:01:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:38,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:38,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:38,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654537985] [2023-11-17 12:01:38,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654537985] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:38,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498251180] [2023-11-17 12:01:38,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:38,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:38,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:38,590 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 12:01:38,608 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 12:01:38,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:38,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:38,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:38,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:38,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:38,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:38,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498251180] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:38,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:38,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:01:38,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663920793] [2023-11-17 12:01:38,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:38,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:38,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:38,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:38,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:38,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 389 transitions, 6753 flow. Second operand has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:38,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:38,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:38,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:39,098 INFO L124 PetriNetUnfolderBase]: 824/1359 cut-off events. [2023-11-17 12:01:39,099 INFO L125 PetriNetUnfolderBase]: For 41155/41155 co-relation queries the response was YES. [2023-11-17 12:01:39,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12598 conditions, 1359 events. 824/1359 cut-off events. For 41155/41155 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6553 event pairs, 117 based on Foata normal form. 2/1361 useless extension candidates. Maximal degree in co-relation 12429. Up to 927 conditions per place. [2023-11-17 12:01:39,114 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 311 selfloop transitions, 94 changer transitions 5/410 dead transitions. [2023-11-17 12:01:39,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 410 transitions, 7861 flow [2023-11-17 12:01:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 12:01:39,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 12:01:39,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 63 transitions. [2023-11-17 12:01:39,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2023-11-17 12:01:39,115 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 63 transitions. [2023-11-17 12:01:39,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 63 transitions. [2023-11-17 12:01:39,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:39,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 63 transitions. [2023-11-17 12:01:39,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:39,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:39,116 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 20.0) internal successors, (160), 8 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:39,116 INFO L175 Difference]: Start difference. First operand has 259 places, 389 transitions, 6753 flow. Second operand 7 states and 63 transitions. [2023-11-17 12:01:39,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 410 transitions, 7861 flow [2023-11-17 12:01:39,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 410 transitions, 7497 flow, removed 20 selfloop flow, removed 10 redundant places. [2023-11-17 12:01:39,313 INFO L231 Difference]: Finished difference. Result has 255 places, 388 transitions, 6577 flow [2023-11-17 12:01:39,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6577, PETRI_PLACES=255, PETRI_TRANSITIONS=388} [2023-11-17 12:01:39,314 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 235 predicate places. [2023-11-17 12:01:39,314 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 388 transitions, 6577 flow [2023-11-17 12:01:39,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.090909090909091) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:39,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:39,314 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:39,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:39,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:39,517 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:39,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:39,519 INFO L85 PathProgramCache]: Analyzing trace with hash -602828238, now seen corresponding path program 25 times [2023-11-17 12:01:39,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:39,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889648219] [2023-11-17 12:01:39,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:39,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:39,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889648219] [2023-11-17 12:01:39,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889648219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:39,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057703650] [2023-11-17 12:01:39,628 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:39,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:39,643 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 12:01:39,690 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 12:01:39,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:39,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:39,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:39,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057703650] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:39,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:39,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:01:39,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138866866] [2023-11-17 12:01:39,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:39,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:39,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:39,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:39,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:39,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:39,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 388 transitions, 6577 flow. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:39,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:39,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:39,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:40,275 INFO L124 PetriNetUnfolderBase]: 849/1394 cut-off events. [2023-11-17 12:01:40,276 INFO L125 PetriNetUnfolderBase]: For 40554/40554 co-relation queries the response was YES. [2023-11-17 12:01:40,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12721 conditions, 1394 events. 849/1394 cut-off events. For 40554/40554 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 6686 event pairs, 43 based on Foata normal form. 16/1410 useless extension candidates. Maximal degree in co-relation 12549. Up to 1012 conditions per place. [2023-11-17 12:01:40,292 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 332 selfloop transitions, 94 changer transitions 0/426 dead transitions. [2023-11-17 12:01:40,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 426 transitions, 7976 flow [2023-11-17 12:01:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 12:01:40,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 12:01:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 109 transitions. [2023-11-17 12:01:40,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892857142857143 [2023-11-17 12:01:40,300 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 109 transitions. [2023-11-17 12:01:40,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 109 transitions. [2023-11-17 12:01:40,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:40,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 109 transitions. [2023-11-17 12:01:40,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 7.785714285714286) internal successors, (109), 14 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,303 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 20.0) internal successors, (300), 15 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,303 INFO L175 Difference]: Start difference. First operand has 255 places, 388 transitions, 6577 flow. Second operand 14 states and 109 transitions. [2023-11-17 12:01:40,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 426 transitions, 7976 flow [2023-11-17 12:01:40,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 426 transitions, 7778 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-11-17 12:01:40,490 INFO L231 Difference]: Finished difference. Result has 266 places, 403 transitions, 6880 flow [2023-11-17 12:01:40,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6880, PETRI_PLACES=266, PETRI_TRANSITIONS=403} [2023-11-17 12:01:40,491 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 246 predicate places. [2023-11-17 12:01:40,492 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 403 transitions, 6880 flow [2023-11-17 12:01:40,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 13 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:40,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:40,492 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:40,497 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 12:01:40,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 12:01:40,698 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:40,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash -571645777, now seen corresponding path program 26 times [2023-11-17 12:01:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880090653] [2023-11-17 12:01:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:40,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:40,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:40,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880090653] [2023-11-17 12:01:40,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880090653] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:40,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179867855] [2023-11-17 12:01:40,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:40,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:40,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:40,785 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 12:01:40,817 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 12:01:40,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:40,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:40,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:40,920 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:40,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:40,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179867855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:40,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:40,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:01:40,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975000108] [2023-11-17 12:01:40,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:40,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:40,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:40,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:40,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:40,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 403 transitions, 6880 flow. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 12:01:40,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:40,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:40,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:41,342 INFO L124 PetriNetUnfolderBase]: 845/1382 cut-off events. [2023-11-17 12:01:41,342 INFO L125 PetriNetUnfolderBase]: For 41493/41493 co-relation queries the response was YES. [2023-11-17 12:01:41,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12690 conditions, 1382 events. 845/1382 cut-off events. For 41493/41493 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 6618 event pairs, 125 based on Foata normal form. 2/1384 useless extension candidates. Maximal degree in co-relation 12511. Up to 971 conditions per place. [2023-11-17 12:01:41,358 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 310 selfloop transitions, 106 changer transitions 4/420 dead transitions. [2023-11-17 12:01:41,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 420 transitions, 7985 flow [2023-11-17 12:01:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:41,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 78 transitions. [2023-11-17 12:01:41,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39 [2023-11-17 12:01:41,359 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 78 transitions. [2023-11-17 12:01:41,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 78 transitions. [2023-11-17 12:01:41,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:41,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 78 transitions. [2023-11-17 12:01:41,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 7.8) internal successors, (78), 10 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:41,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:41,359 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:41,360 INFO L175 Difference]: Start difference. First operand has 266 places, 403 transitions, 6880 flow. Second operand 10 states and 78 transitions. [2023-11-17 12:01:41,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 420 transitions, 7985 flow [2023-11-17 12:01:41,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 420 transitions, 7792 flow, removed 77 selfloop flow, removed 4 redundant places. [2023-11-17 12:01:41,567 INFO L231 Difference]: Finished difference. Result has 271 places, 400 transitions, 6856 flow [2023-11-17 12:01:41,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6678, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6856, PETRI_PLACES=271, PETRI_TRANSITIONS=400} [2023-11-17 12:01:41,568 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 251 predicate places. [2023-11-17 12:01:41,568 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 400 transitions, 6856 flow [2023-11-17 12:01:41,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 13 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 12:01:41,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:41,568 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:41,573 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 12:01:41,773 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,SelfDestructingSolverStorable39 [2023-11-17 12:01:41,774 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:41,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:41,774 INFO L85 PathProgramCache]: Analyzing trace with hash 2006175920, now seen corresponding path program 27 times [2023-11-17 12:01:41,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:41,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852721127] [2023-11-17 12:01:41,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:41,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:41,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:41,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:41,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852721127] [2023-11-17 12:01:41,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852721127] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:41,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680569891] [2023-11-17 12:01:41,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:41,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:41,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:41,834 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 12:01:41,836 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 12:01:41,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:01:41,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:41,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:41,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:41,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:41,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680569891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:42,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:42,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-17 12:01:42,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754225683] [2023-11-17 12:01:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-17 12:01:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-17 12:01:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-17 12:01:42,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:42,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 400 transitions, 6856 flow. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 12:01:42,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:42,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:42,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:42,461 INFO L124 PetriNetUnfolderBase]: 917/1486 cut-off events. [2023-11-17 12:01:42,461 INFO L125 PetriNetUnfolderBase]: For 49685/49685 co-relation queries the response was YES. [2023-11-17 12:01:42,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14135 conditions, 1486 events. 917/1486 cut-off events. For 49685/49685 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 7130 event pairs, 41 based on Foata normal form. 18/1504 useless extension candidates. Maximal degree in co-relation 14001. Up to 936 conditions per place. [2023-11-17 12:01:42,486 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 294 selfloop transitions, 178 changer transitions 0/472 dead transitions. [2023-11-17 12:01:42,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 472 transitions, 9179 flow [2023-11-17 12:01:42,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:01:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:01:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 133 transitions. [2023-11-17 12:01:42,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911764705882353 [2023-11-17 12:01:42,487 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 133 transitions. [2023-11-17 12:01:42,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 133 transitions. [2023-11-17 12:01:42,487 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:42,487 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 133 transitions. [2023-11-17 12:01:42,487 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.823529411764706) internal successors, (133), 17 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,488 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:42,488 INFO L175 Difference]: Start difference. First operand has 271 places, 400 transitions, 6856 flow. Second operand 17 states and 133 transitions. [2023-11-17 12:01:42,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 472 transitions, 9179 flow [2023-11-17 12:01:42,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 472 transitions, 8961 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-11-17 12:01:42,695 INFO L231 Difference]: Finished difference. Result has 282 places, 447 transitions, 8383 flow [2023-11-17 12:01:42,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=6595, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8383, PETRI_PLACES=282, PETRI_TRANSITIONS=447} [2023-11-17 12:01:42,696 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-11-17 12:01:42,696 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 447 transitions, 8383 flow [2023-11-17 12:01:42,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 13 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 12:01:42,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:42,696 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:42,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-17 12:01:42,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:42,901 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:42,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:42,902 INFO L85 PathProgramCache]: Analyzing trace with hash 951299652, now seen corresponding path program 28 times [2023-11-17 12:01:42,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:42,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973579912] [2023-11-17 12:01:42,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:42,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:42,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973579912] [2023-11-17 12:01:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973579912] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273641991] [2023-11-17 12:01:42,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:42,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:42,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:42,973 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 12:01:42,974 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 12:01:43,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:43,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:43,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:43,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:43,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:43,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273641991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:43,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:43,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:43,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747142148] [2023-11-17 12:01:43,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:43,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:43,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:43,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:43,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 447 transitions, 8383 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:43,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:43,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:43,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:43,646 INFO L124 PetriNetUnfolderBase]: 950/1535 cut-off events. [2023-11-17 12:01:43,647 INFO L125 PetriNetUnfolderBase]: For 52789/52789 co-relation queries the response was YES. [2023-11-17 12:01:43,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15242 conditions, 1535 events. 950/1535 cut-off events. For 52789/52789 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 7352 event pairs, 48 based on Foata normal form. 12/1547 useless extension candidates. Maximal degree in co-relation 15027. Up to 987 conditions per place. [2023-11-17 12:01:43,663 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 347 selfloop transitions, 143 changer transitions 2/492 dead transitions. [2023-11-17 12:01:43,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 492 transitions, 10044 flow [2023-11-17 12:01:43,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:01:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:01:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 108 transitions. [2023-11-17 12:01:43,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4153846153846154 [2023-11-17 12:01:43,665 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 108 transitions. [2023-11-17 12:01:43,665 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 108 transitions. [2023-11-17 12:01:43,665 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:43,665 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 108 transitions. [2023-11-17 12:01:43,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.307692307692308) internal successors, (108), 13 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:43,666 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:43,666 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:43,666 INFO L175 Difference]: Start difference. First operand has 282 places, 447 transitions, 8383 flow. Second operand 13 states and 108 transitions. [2023-11-17 12:01:43,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 492 transitions, 10044 flow [2023-11-17 12:01:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 492 transitions, 9283 flow, removed 365 selfloop flow, removed 6 redundant places. [2023-11-17 12:01:43,970 INFO L231 Difference]: Finished difference. Result has 291 places, 462 transitions, 8345 flow [2023-11-17 12:01:43,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8345, PETRI_PLACES=291, PETRI_TRANSITIONS=462} [2023-11-17 12:01:43,971 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 271 predicate places. [2023-11-17 12:01:43,971 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 462 transitions, 8345 flow [2023-11-17 12:01:43,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:43,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:43,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:43,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-17 12:01:44,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:44,176 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:44,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash -813565574, now seen corresponding path program 29 times [2023-11-17 12:01:44,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:44,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103765660] [2023-11-17 12:01:44,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:44,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:44,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:44,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:44,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103765660] [2023-11-17 12:01:44,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103765660] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:44,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381032248] [2023-11-17 12:01:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:44,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:44,242 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 12:01:44,244 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 12:01:44,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:44,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:44,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:44,385 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:44,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:44,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:44,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381032248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:44,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:44,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:01:44,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92887133] [2023-11-17 12:01:44,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:44,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:01:44,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:44,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:01:44,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:01:44,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:44,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 462 transitions, 8345 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:44,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:44,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:44,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:45,028 INFO L124 PetriNetUnfolderBase]: 1002/1621 cut-off events. [2023-11-17 12:01:45,028 INFO L125 PetriNetUnfolderBase]: For 41225/41225 co-relation queries the response was YES. [2023-11-17 12:01:45,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15228 conditions, 1621 events. 1002/1621 cut-off events. For 41225/41225 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 7931 event pairs, 40 based on Foata normal form. 12/1633 useless extension candidates. Maximal degree in co-relation 14971. Up to 1067 conditions per place. [2023-11-17 12:01:45,046 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 357 selfloop transitions, 171 changer transitions 0/528 dead transitions. [2023-11-17 12:01:45,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 528 transitions, 10267 flow [2023-11-17 12:01:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:01:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:01:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 164 transitions. [2023-11-17 12:01:45,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3565217391304348 [2023-11-17 12:01:45,047 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 164 transitions. [2023-11-17 12:01:45,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 164 transitions. [2023-11-17 12:01:45,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:45,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 164 transitions. [2023-11-17 12:01:45,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:45,048 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:45,048 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:45,048 INFO L175 Difference]: Start difference. First operand has 291 places, 462 transitions, 8345 flow. Second operand 23 states and 164 transitions. [2023-11-17 12:01:45,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 528 transitions, 10267 flow [2023-11-17 12:01:45,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 528 transitions, 10041 flow, removed 32 selfloop flow, removed 8 redundant places. [2023-11-17 12:01:45,312 INFO L231 Difference]: Finished difference. Result has 312 places, 498 transitions, 9239 flow [2023-11-17 12:01:45,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8112, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=9239, PETRI_PLACES=312, PETRI_TRANSITIONS=498} [2023-11-17 12:01:45,313 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-11-17 12:01:45,313 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 498 transitions, 9239 flow [2023-11-17 12:01:45,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:45,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:45,313 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:45,318 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 12:01:45,514 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,SelfDestructingSolverStorable42 [2023-11-17 12:01:45,514 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:45,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:45,515 INFO L85 PathProgramCache]: Analyzing trace with hash -246668972, now seen corresponding path program 30 times [2023-11-17 12:01:45,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:45,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296932089] [2023-11-17 12:01:45,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:45,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:45,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:45,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296932089] [2023-11-17 12:01:45,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296932089] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:45,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519971064] [2023-11-17 12:01:45,607 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:45,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:45,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:45,608 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 12:01:45,609 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 12:01:45,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:01:45,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:45,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:45,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:45,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:45,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:45,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519971064] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:45,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:45,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-17 12:01:45,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267293410] [2023-11-17 12:01:45,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-17 12:01:45,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-17 12:01:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-17 12:01:45,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:45,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 498 transitions, 9239 flow. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:45,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:45,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:45,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:46,222 INFO L124 PetriNetUnfolderBase]: 1050/1703 cut-off events. [2023-11-17 12:01:46,222 INFO L125 PetriNetUnfolderBase]: For 44426/44426 co-relation queries the response was YES. [2023-11-17 12:01:46,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16357 conditions, 1703 events. 1050/1703 cut-off events. For 44426/44426 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 8454 event pairs, 12 based on Foata normal form. 6/1709 useless extension candidates. Maximal degree in co-relation 16057. Up to 864 conditions per place. [2023-11-17 12:01:46,246 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 349 selfloop transitions, 204 changer transitions 0/553 dead transitions. [2023-11-17 12:01:46,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 553 transitions, 11174 flow [2023-11-17 12:01:46,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:01:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:01:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 85 transitions. [2023-11-17 12:01:46,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2023-11-17 12:01:46,248 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 85 transitions. [2023-11-17 12:01:46,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 85 transitions. [2023-11-17 12:01:46,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:46,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 85 transitions. [2023-11-17 12:01:46,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:46,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:46,249 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:01:46,249 INFO L175 Difference]: Start difference. First operand has 312 places, 498 transitions, 9239 flow. Second operand 10 states and 85 transitions. [2023-11-17 12:01:46,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 553 transitions, 11174 flow [2023-11-17 12:01:46,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 553 transitions, 10940 flow, removed 76 selfloop flow, removed 10 redundant places. [2023-11-17 12:01:46,606 INFO L231 Difference]: Finished difference. Result has 314 places, 523 transitions, 9977 flow [2023-11-17 12:01:46,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=8957, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9977, PETRI_PLACES=314, PETRI_TRANSITIONS=523} [2023-11-17 12:01:46,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 294 predicate places. [2023-11-17 12:01:46,607 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 523 transitions, 9977 flow [2023-11-17 12:01:46,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:46,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:46,607 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:46,621 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 12:01:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:46,813 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:46,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1415799382, now seen corresponding path program 31 times [2023-11-17 12:01:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:46,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594374456] [2023-11-17 12:01:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:46,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594374456] [2023-11-17 12:01:46,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594374456] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:46,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286037245] [2023-11-17 12:01:46,877 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:46,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:46,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:46,893 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:46,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-17 12:01:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:47,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 12:01:47,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:47,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:47,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286037245] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:47,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:47,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-17 12:01:47,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075650727] [2023-11-17 12:01:47,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:47,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-17 12:01:47,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:47,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-17 12:01:47,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-17 12:01:47,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:47,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 523 transitions, 9977 flow. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:47,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:47,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:47,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:47,816 INFO L124 PetriNetUnfolderBase]: 1045/1700 cut-off events. [2023-11-17 12:01:47,817 INFO L125 PetriNetUnfolderBase]: For 47031/47031 co-relation queries the response was YES. [2023-11-17 12:01:47,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16709 conditions, 1700 events. 1045/1700 cut-off events. For 47031/47031 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 8522 event pairs, 43 based on Foata normal form. 10/1710 useless extension candidates. Maximal degree in co-relation 16405. Up to 1006 conditions per place. [2023-11-17 12:01:47,840 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 343 selfloop transitions, 207 changer transitions 0/550 dead transitions. [2023-11-17 12:01:47,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 550 transitions, 11314 flow [2023-11-17 12:01:47,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 12:01:47,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 12:01:47,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 123 transitions. [2023-11-17 12:01:47,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384375 [2023-11-17 12:01:47,841 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 123 transitions. [2023-11-17 12:01:47,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 123 transitions. [2023-11-17 12:01:47,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:47,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 123 transitions. [2023-11-17 12:01:47,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 7.6875) internal successors, (123), 16 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:47,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:47,843 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 20.0) internal successors, (340), 17 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:47,843 INFO L175 Difference]: Start difference. First operand has 314 places, 523 transitions, 9977 flow. Second operand 16 states and 123 transitions. [2023-11-17 12:01:47,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 550 transitions, 11314 flow [2023-11-17 12:01:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 550 transitions, 10836 flow, removed 26 selfloop flow, removed 13 redundant places. [2023-11-17 12:01:48,180 INFO L231 Difference]: Finished difference. Result has 316 places, 525 transitions, 9975 flow [2023-11-17 12:01:48,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9356, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=9975, PETRI_PLACES=316, PETRI_TRANSITIONS=525} [2023-11-17 12:01:48,182 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 296 predicate places. [2023-11-17 12:01:48,182 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 525 transitions, 9975 flow [2023-11-17 12:01:48,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:48,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:48,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:48,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-17 12:01:48,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-17 12:01:48,385 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:48,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:48,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1666410802, now seen corresponding path program 32 times [2023-11-17 12:01:48,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:48,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156783918] [2023-11-17 12:01:48,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:48,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:48,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:48,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:48,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:48,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156783918] [2023-11-17 12:01:48,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156783918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:48,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220063971] [2023-11-17 12:01:48,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:01:48,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:48,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:48,578 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:48,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-17 12:01:48,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:48,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:48,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:48,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:48,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:48,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220063971] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:48,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:48,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-17 12:01:48,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419490797] [2023-11-17 12:01:48,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:48,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:01:48,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:01:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:01:48,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:48,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 525 transitions, 9975 flow. Second operand has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:48,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:48,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:48,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:49,721 INFO L124 PetriNetUnfolderBase]: 1238/2069 cut-off events. [2023-11-17 12:01:49,722 INFO L125 PetriNetUnfolderBase]: For 59954/59954 co-relation queries the response was YES. [2023-11-17 12:01:49,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20030 conditions, 2069 events. 1238/2069 cut-off events. For 59954/59954 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 11194 event pairs, 33 based on Foata normal form. 2/2071 useless extension candidates. Maximal degree in co-relation 19695. Up to 1575 conditions per place. [2023-11-17 12:01:49,748 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 540 selfloop transitions, 109 changer transitions 13/662 dead transitions. [2023-11-17 12:01:49,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 662 transitions, 13396 flow [2023-11-17 12:01:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:01:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:01:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2023-11-17 12:01:49,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5409090909090909 [2023-11-17 12:01:49,749 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 119 transitions. [2023-11-17 12:01:49,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 119 transitions. [2023-11-17 12:01:49,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:49,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 119 transitions. [2023-11-17 12:01:49,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 10.818181818181818) internal successors, (119), 11 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:49,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:49,749 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:49,750 INFO L175 Difference]: Start difference. First operand has 316 places, 525 transitions, 9975 flow. Second operand 11 states and 119 transitions. [2023-11-17 12:01:49,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 662 transitions, 13396 flow [2023-11-17 12:01:50,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 662 transitions, 12946 flow, removed 24 selfloop flow, removed 13 redundant places. [2023-11-17 12:01:50,083 INFO L231 Difference]: Finished difference. Result has 322 places, 587 transitions, 11182 flow [2023-11-17 12:01:50,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=9559, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11182, PETRI_PLACES=322, PETRI_TRANSITIONS=587} [2023-11-17 12:01:50,083 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 302 predicate places. [2023-11-17 12:01:50,083 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 587 transitions, 11182 flow [2023-11-17 12:01:50,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.3) internal successors, (106), 20 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:50,084 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:50,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-17 12:01:50,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:50,289 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:50,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:50,289 INFO L85 PathProgramCache]: Analyzing trace with hash 635389356, now seen corresponding path program 33 times [2023-11-17 12:01:50,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:50,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410869224] [2023-11-17 12:01:50,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:50,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:50,526 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:50,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410869224] [2023-11-17 12:01:50,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410869224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:50,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281245581] [2023-11-17 12:01:50,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:01:50,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:50,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:50,541 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:50,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-17 12:01:50,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:01:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:50,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:50,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:50,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:50,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:50,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:50,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281245581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:50,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:50,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-17 12:01:50,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519027858] [2023-11-17 12:01:50,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:01:50,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:01:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:01:50,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:50,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 587 transitions, 11182 flow. Second operand has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:50,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:50,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:50,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:51,813 INFO L124 PetriNetUnfolderBase]: 1252/2101 cut-off events. [2023-11-17 12:01:51,813 INFO L125 PetriNetUnfolderBase]: For 65765/65765 co-relation queries the response was YES. [2023-11-17 12:01:51,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20822 conditions, 2101 events. 1252/2101 cut-off events. For 65765/65765 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 11507 event pairs, 33 based on Foata normal form. 2/2103 useless extension candidates. Maximal degree in co-relation 20672. Up to 1723 conditions per place. [2023-11-17 12:01:51,848 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 534 selfloop transitions, 92 changer transitions 19/645 dead transitions. [2023-11-17 12:01:51,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 645 transitions, 13161 flow [2023-11-17 12:01:51,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:01:51,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:01:51,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 114 transitions. [2023-11-17 12:01:51,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-17 12:01:51,849 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 114 transitions. [2023-11-17 12:01:51,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 114 transitions. [2023-11-17 12:01:51,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:51,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 114 transitions. [2023-11-17 12:01:51,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 9.5) internal successors, (114), 12 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,853 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:51,853 INFO L175 Difference]: Start difference. First operand has 322 places, 587 transitions, 11182 flow. Second operand 12 states and 114 transitions. [2023-11-17 12:01:51,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 645 transitions, 13161 flow [2023-11-17 12:01:52,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 645 transitions, 12755 flow, removed 203 selfloop flow, removed 2 redundant places. [2023-11-17 12:01:52,328 INFO L231 Difference]: Finished difference. Result has 335 places, 593 transitions, 11333 flow [2023-11-17 12:01:52,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=10854, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11333, PETRI_PLACES=335, PETRI_TRANSITIONS=593} [2023-11-17 12:01:52,328 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 315 predicate places. [2023-11-17 12:01:52,328 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 593 transitions, 11333 flow [2023-11-17 12:01:52,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.466666666666667) internal successors, (82), 15 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:52,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:52,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:52,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-17 12:01:52,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-17 12:01:52,535 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:52,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:52,535 INFO L85 PathProgramCache]: Analyzing trace with hash 826185962, now seen corresponding path program 34 times [2023-11-17 12:01:52,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:52,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938285167] [2023-11-17 12:01:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:52,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:52,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:52,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938285167] [2023-11-17 12:01:52,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938285167] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:52,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579657449] [2023-11-17 12:01:52,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:01:52,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:52,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:52,785 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-17 12:01:52,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:01:52,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:52,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:52,878 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:53,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:53,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:53,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:53,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579657449] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:53,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:53,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-11-17 12:01:53,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005622707] [2023-11-17 12:01:53,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:53,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:01:53,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:53,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:01:53,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:01:53,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:53,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 593 transitions, 11333 flow. Second operand has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:53,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:53,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:53,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:53,999 INFO L124 PetriNetUnfolderBase]: 1230/2062 cut-off events. [2023-11-17 12:01:53,999 INFO L125 PetriNetUnfolderBase]: For 57069/57069 co-relation queries the response was YES. [2023-11-17 12:01:54,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20154 conditions, 2062 events. 1230/2062 cut-off events. For 57069/57069 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 11226 event pairs, 34 based on Foata normal form. 1/2063 useless extension candidates. Maximal degree in co-relation 19999. Up to 1583 conditions per place. [2023-11-17 12:01:54,027 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 531 selfloop transitions, 109 changer transitions 5/645 dead transitions. [2023-11-17 12:01:54,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 645 transitions, 13186 flow [2023-11-17 12:01:54,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:01:54,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:01:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 100 transitions. [2023-11-17 12:01:54,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2023-11-17 12:01:54,028 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 100 transitions. [2023-11-17 12:01:54,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 100 transitions. [2023-11-17 12:01:54,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:54,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 100 transitions. [2023-11-17 12:01:54,029 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,029 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,029 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,029 INFO L175 Difference]: Start difference. First operand has 335 places, 593 transitions, 11333 flow. Second operand 9 states and 100 transitions. [2023-11-17 12:01:54,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 645 transitions, 13186 flow [2023-11-17 12:01:54,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 645 transitions, 12873 flow, removed 109 selfloop flow, removed 5 redundant places. [2023-11-17 12:01:54,472 INFO L231 Difference]: Finished difference. Result has 339 places, 597 transitions, 11411 flow [2023-11-17 12:01:54,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11032, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11411, PETRI_PLACES=339, PETRI_TRANSITIONS=597} [2023-11-17 12:01:54,473 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 319 predicate places. [2023-11-17 12:01:54,473 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 597 transitions, 11411 flow [2023-11-17 12:01:54,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.25) internal successors, (105), 20 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:54,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:54,473 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:54,479 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:54,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-17 12:01:54,679 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:54,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:54,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1805760918, now seen corresponding path program 35 times [2023-11-17 12:01:54,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:54,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924985826] [2023-11-17 12:01:54,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:54,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:54,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:54,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:54,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924985826] [2023-11-17 12:01:54,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924985826] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:54,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958452435] [2023-11-17 12:01:54,983 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:01:54,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:54,984 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:55,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-17 12:01:55,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:01:55,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:55,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:55,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:55,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:55,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958452435] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:55,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:55,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-11-17 12:01:55,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845459279] [2023-11-17 12:01:55,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:55,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:01:55,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:55,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:01:55,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:01:55,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:55,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 597 transitions, 11411 flow. Second operand has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:55,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:55,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:55,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:56,351 INFO L124 PetriNetUnfolderBase]: 1227/2053 cut-off events. [2023-11-17 12:01:56,352 INFO L125 PetriNetUnfolderBase]: For 57540/57540 co-relation queries the response was YES. [2023-11-17 12:01:56,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19894 conditions, 2053 events. 1227/2053 cut-off events. For 57540/57540 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 11106 event pairs, 33 based on Foata normal form. 1/2054 useless extension candidates. Maximal degree in co-relation 19746. Up to 1643 conditions per place. [2023-11-17 12:01:56,380 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 532 selfloop transitions, 111 changer transitions 5/648 dead transitions. [2023-11-17 12:01:56,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 648 transitions, 13217 flow [2023-11-17 12:01:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:01:56,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:01:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2023-11-17 12:01:56,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-17 12:01:56,381 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 108 transitions. [2023-11-17 12:01:56,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 108 transitions. [2023-11-17 12:01:56,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:56,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 108 transitions. [2023-11-17 12:01:56,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,382 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,382 INFO L175 Difference]: Start difference. First operand has 339 places, 597 transitions, 11411 flow. Second operand 11 states and 108 transitions. [2023-11-17 12:01:56,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 648 transitions, 13217 flow [2023-11-17 12:01:56,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 648 transitions, 12946 flow, removed 44 selfloop flow, removed 6 redundant places. [2023-11-17 12:01:56,851 INFO L231 Difference]: Finished difference. Result has 345 places, 605 transitions, 11607 flow [2023-11-17 12:01:56,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11146, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11607, PETRI_PLACES=345, PETRI_TRANSITIONS=605} [2023-11-17 12:01:56,852 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 325 predicate places. [2023-11-17 12:01:56,852 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 605 transitions, 11607 flow [2023-11-17 12:01:56,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.368421052631579) internal successors, (102), 19 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:56,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:56,852 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:56,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:57,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-17 12:01:57,058 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:57,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:57,058 INFO L85 PathProgramCache]: Analyzing trace with hash -573998278, now seen corresponding path program 36 times [2023-11-17 12:01:57,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:57,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85723675] [2023-11-17 12:01:57,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:57,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:57,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:57,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85723675] [2023-11-17 12:01:57,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85723675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:57,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560627280] [2023-11-17 12:01:57,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:01:57,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:57,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:57,236 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:57,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-17 12:01:57,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:01:57,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:01:57,336 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:57,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:01:57,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:57,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560627280] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:01:57,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:01:57,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 17 [2023-11-17 12:01:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713042790] [2023-11-17 12:01:57,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:01:57,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 12:01:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:01:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 12:01:57,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2023-11-17 12:01:57,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:01:57,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 605 transitions, 11607 flow. Second operand has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:57,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:01:57,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:01:57,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:01:58,325 INFO L124 PetriNetUnfolderBase]: 1296/2182 cut-off events. [2023-11-17 12:01:58,326 INFO L125 PetriNetUnfolderBase]: For 66329/66329 co-relation queries the response was YES. [2023-11-17 12:01:58,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21335 conditions, 2182 events. 1296/2182 cut-off events. For 66329/66329 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 12087 event pairs, 51 based on Foata normal form. 1/2183 useless extension candidates. Maximal degree in co-relation 21176. Up to 1906 conditions per place. [2023-11-17 12:01:58,356 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 582 selfloop transitions, 87 changer transitions 9/678 dead transitions. [2023-11-17 12:01:58,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 678 transitions, 14015 flow [2023-11-17 12:01:58,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:01:58,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:01:58,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2023-11-17 12:01:58,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277777777777778 [2023-11-17 12:01:58,357 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 95 transitions. [2023-11-17 12:01:58,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 95 transitions. [2023-11-17 12:01:58,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:01:58,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 95 transitions. [2023-11-17 12:01:58,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,358 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:58,358 INFO L175 Difference]: Start difference. First operand has 345 places, 605 transitions, 11607 flow. Second operand 9 states and 95 transitions. [2023-11-17 12:01:58,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 678 transitions, 14015 flow [2023-11-17 12:01:59,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 678 transitions, 13794 flow, removed 21 selfloop flow, removed 8 redundant places. [2023-11-17 12:01:59,086 INFO L231 Difference]: Finished difference. Result has 348 places, 632 transitions, 12214 flow [2023-11-17 12:01:59,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11394, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12214, PETRI_PLACES=348, PETRI_TRANSITIONS=632} [2023-11-17 12:01:59,087 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 328 predicate places. [2023-11-17 12:01:59,087 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 632 transitions, 12214 flow [2023-11-17 12:01:59,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.421052631578948) internal successors, (103), 19 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:01:59,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:01:59,087 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:01:59,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-11-17 12:01:59,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-17 12:01:59,294 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:01:59,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:01:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash -652300558, now seen corresponding path program 37 times [2023-11-17 12:01:59,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:01:59,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434525960] [2023-11-17 12:01:59,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:01:59,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:01:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:59,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:01:59,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434525960] [2023-11-17 12:01:59,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434525960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:01:59,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354068664] [2023-11-17 12:01:59,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:01:59,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:01:59,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:01:59,544 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:01:59,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-17 12:01:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:01:59,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:01:59,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:01:59,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:01:59,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:00,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354068664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:00,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:00,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-11-17 12:02:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530603897] [2023-11-17 12:02:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:00,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:02:00,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:02:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:02:00,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:00,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 632 transitions, 12214 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:00,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:00,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:00,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:01,247 INFO L124 PetriNetUnfolderBase]: 1289/2165 cut-off events. [2023-11-17 12:02:01,247 INFO L125 PetriNetUnfolderBase]: For 66842/66842 co-relation queries the response was YES. [2023-11-17 12:02:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21300 conditions, 2165 events. 1289/2165 cut-off events. For 66842/66842 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 11932 event pairs, 52 based on Foata normal form. 1/2166 useless extension candidates. Maximal degree in co-relation 21142. Up to 1906 conditions per place. [2023-11-17 12:02:01,287 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 575 selfloop transitions, 87 changer transitions 6/668 dead transitions. [2023-11-17 12:02:01,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 668 transitions, 13936 flow [2023-11-17 12:02:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:02:01,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:02:01,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2023-11-17 12:02:01,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2023-11-17 12:02:01,289 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 86 transitions. [2023-11-17 12:02:01,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 86 transitions. [2023-11-17 12:02:01,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:01,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 86 transitions. [2023-11-17 12:02:01,289 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,290 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,290 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,290 INFO L175 Difference]: Start difference. First operand has 348 places, 632 transitions, 12214 flow. Second operand 8 states and 86 transitions. [2023-11-17 12:02:01,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 668 transitions, 13936 flow [2023-11-17 12:02:01,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 668 transitions, 13667 flow, removed 100 selfloop flow, removed 4 redundant places. [2023-11-17 12:02:01,907 INFO L231 Difference]: Finished difference. Result has 352 places, 635 transitions, 12285 flow [2023-11-17 12:02:01,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=11951, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12285, PETRI_PLACES=352, PETRI_TRANSITIONS=635} [2023-11-17 12:02:01,908 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 332 predicate places. [2023-11-17 12:02:01,908 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 635 transitions, 12285 flow [2023-11-17 12:02:01,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:01,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:01,909 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:01,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:02,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:02,114 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:02,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:02,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1143750782, now seen corresponding path program 38 times [2023-11-17 12:02:02,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:02,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12925859] [2023-11-17 12:02:02,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:02,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:02,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:02,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12925859] [2023-11-17 12:02:02,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12925859] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:02,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317128838] [2023-11-17 12:02:02,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:02,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:02,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:02,388 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:02,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-17 12:02:02,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:02,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:02,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:02,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:02,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:02,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317128838] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:02,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:02,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2023-11-17 12:02:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303390763] [2023-11-17 12:02:02,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:02,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:02,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:02,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:02,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 635 transitions, 12285 flow. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:02,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:02,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:02,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:03,598 INFO L124 PetriNetUnfolderBase]: 1282/2152 cut-off events. [2023-11-17 12:02:03,599 INFO L125 PetriNetUnfolderBase]: For 63067/63067 co-relation queries the response was YES. [2023-11-17 12:02:03,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21091 conditions, 2152 events. 1282/2152 cut-off events. For 63067/63067 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 11838 event pairs, 51 based on Foata normal form. 1/2153 useless extension candidates. Maximal degree in co-relation 20934. Up to 1948 conditions per place. [2023-11-17 12:02:03,630 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 588 selfloop transitions, 72 changer transitions 5/665 dead transitions. [2023-11-17 12:02:03,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 665 transitions, 13839 flow [2023-11-17 12:02:03,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:02:03,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:02:03,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-17 12:02:03,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-17 12:02:03,632 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-17 12:02:03,633 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-17 12:02:03,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:03,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-17 12:02:03,633 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:03,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:03,633 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:03,633 INFO L175 Difference]: Start difference. First operand has 352 places, 635 transitions, 12285 flow. Second operand 9 states and 86 transitions. [2023-11-17 12:02:03,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 665 transitions, 13839 flow [2023-11-17 12:02:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 665 transitions, 13611 flow, removed 47 selfloop flow, removed 5 redundant places. [2023-11-17 12:02:04,161 INFO L231 Difference]: Finished difference. Result has 356 places, 638 transitions, 12372 flow [2023-11-17 12:02:04,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12061, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12372, PETRI_PLACES=356, PETRI_TRANSITIONS=638} [2023-11-17 12:02:04,162 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 336 predicate places. [2023-11-17 12:02:04,162 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 638 transitions, 12372 flow [2023-11-17 12:02:04,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:04,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:04,162 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:04,167 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-17 12:02:04,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:04,366 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:04,366 INFO L85 PathProgramCache]: Analyzing trace with hash -970105416, now seen corresponding path program 39 times [2023-11-17 12:02:04,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:04,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677918484] [2023-11-17 12:02:04,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:04,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:04,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:04,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677918484] [2023-11-17 12:02:04,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677918484] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:04,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186209178] [2023-11-17 12:02:04,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:04,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:04,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:04,565 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:04,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-17 12:02:04,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 12:02:04,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:04,663 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:04,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:04,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:04,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:04,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186209178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:04,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:04,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-11-17 12:02:04,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141205876] [2023-11-17 12:02:04,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:04,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:02:04,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:04,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:02:04,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:02:04,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:04,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 638 transitions, 12372 flow. Second operand has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:04,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:04,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:04,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:05,865 INFO L124 PetriNetUnfolderBase]: 1398/2389 cut-off events. [2023-11-17 12:02:05,865 INFO L125 PetriNetUnfolderBase]: For 75187/75187 co-relation queries the response was YES. [2023-11-17 12:02:05,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23756 conditions, 2389 events. 1398/2389 cut-off events. For 75187/75187 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 13792 event pairs, 60 based on Foata normal form. 2/2391 useless extension candidates. Maximal degree in co-relation 23586. Up to 2069 conditions per place. [2023-11-17 12:02:05,905 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 629 selfloop transitions, 93 changer transitions 25/747 dead transitions. [2023-11-17 12:02:05,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 747 transitions, 15625 flow [2023-11-17 12:02:05,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-17 12:02:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-17 12:02:05,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 118 transitions. [2023-11-17 12:02:05,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49166666666666664 [2023-11-17 12:02:05,906 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 118 transitions. [2023-11-17 12:02:05,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 118 transitions. [2023-11-17 12:02:05,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:05,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 118 transitions. [2023-11-17 12:02:05,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 9.833333333333334) internal successors, (118), 12 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,907 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:05,907 INFO L175 Difference]: Start difference. First operand has 356 places, 638 transitions, 12372 flow. Second operand 12 states and 118 transitions. [2023-11-17 12:02:05,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 747 transitions, 15625 flow [2023-11-17 12:02:06,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 747 transitions, 15345 flow, removed 75 selfloop flow, removed 7 redundant places. [2023-11-17 12:02:06,701 INFO L231 Difference]: Finished difference. Result has 369 places, 684 transitions, 13657 flow [2023-11-17 12:02:06,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=12100, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=13657, PETRI_PLACES=369, PETRI_TRANSITIONS=684} [2023-11-17 12:02:06,707 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 349 predicate places. [2023-11-17 12:02:06,707 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 684 transitions, 13657 flow [2023-11-17 12:02:06,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.625) internal successors, (90), 16 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:06,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:06,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:06,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-17 12:02:06,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-17 12:02:06,914 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:06,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:06,914 INFO L85 PathProgramCache]: Analyzing trace with hash -103500488, now seen corresponding path program 40 times [2023-11-17 12:02:06,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:06,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671177626] [2023-11-17 12:02:06,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:06,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:07,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:07,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671177626] [2023-11-17 12:02:07,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671177626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:07,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329991924] [2023-11-17 12:02:07,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:07,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:07,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:07,105 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:07,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-17 12:02:07,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:07,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:07,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:07,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:07,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:07,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329991924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:07,474 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:07,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:02:07,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729000554] [2023-11-17 12:02:07,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:02:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:02:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:02:07,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:07,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 684 transitions, 13657 flow. Second operand has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:07,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:07,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:07,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:08,617 INFO L124 PetriNetUnfolderBase]: 1455/2487 cut-off events. [2023-11-17 12:02:08,617 INFO L125 PetriNetUnfolderBase]: For 87582/87582 co-relation queries the response was YES. [2023-11-17 12:02:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25351 conditions, 2487 events. 1455/2487 cut-off events. For 87582/87582 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 14489 event pairs, 65 based on Foata normal form. 1/2488 useless extension candidates. Maximal degree in co-relation 25152. Up to 2077 conditions per place. [2023-11-17 12:02:08,658 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 659 selfloop transitions, 110 changer transitions 5/774 dead transitions. [2023-11-17 12:02:08,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 774 transitions, 16657 flow [2023-11-17 12:02:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:02:08,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:02:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2023-11-17 12:02:08,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-11-17 12:02:08,659 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 110 transitions. [2023-11-17 12:02:08,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 110 transitions. [2023-11-17 12:02:08,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:08,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 110 transitions. [2023-11-17 12:02:08,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:08,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:02:08,663 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:02:08,663 INFO L175 Difference]: Start difference. First operand has 369 places, 684 transitions, 13657 flow. Second operand 10 states and 110 transitions. [2023-11-17 12:02:08,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 774 transitions, 16657 flow [2023-11-17 12:02:09,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 774 transitions, 16017 flow, removed 320 selfloop flow, removed 2 redundant places. [2023-11-17 12:02:09,549 INFO L231 Difference]: Finished difference. Result has 378 places, 715 transitions, 14140 flow [2023-11-17 12:02:09,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13047, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=684, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14140, PETRI_PLACES=378, PETRI_TRANSITIONS=715} [2023-11-17 12:02:09,550 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 358 predicate places. [2023-11-17 12:02:09,550 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 715 transitions, 14140 flow [2023-11-17 12:02:09,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.529411764705882) internal successors, (94), 17 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:09,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:09,550 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:09,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:09,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:09,757 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:09,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:09,757 INFO L85 PathProgramCache]: Analyzing trace with hash 293259798, now seen corresponding path program 41 times [2023-11-17 12:02:09,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:09,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924031012] [2023-11-17 12:02:09,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:09,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:09,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:09,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:09,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924031012] [2023-11-17 12:02:09,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924031012] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:09,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269263782] [2023-11-17 12:02:09,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:09,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:09,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:09,956 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:09,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-17 12:02:10,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:02:10,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:10,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:10,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:10,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:10,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269263782] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:10,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:10,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-11-17 12:02:10,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652495493] [2023-11-17 12:02:10,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:10,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:02:10,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:02:10,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:02:10,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:10,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 715 transitions, 14140 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:10,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:10,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:10,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:11,426 INFO L124 PetriNetUnfolderBase]: 1494/2561 cut-off events. [2023-11-17 12:02:11,427 INFO L125 PetriNetUnfolderBase]: For 88595/88595 co-relation queries the response was YES. [2023-11-17 12:02:11,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25515 conditions, 2561 events. 1494/2561 cut-off events. For 88595/88595 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 15074 event pairs, 63 based on Foata normal form. 2/2563 useless extension candidates. Maximal degree in co-relation 25325. Up to 2327 conditions per place. [2023-11-17 12:02:11,467 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 681 selfloop transitions, 73 changer transitions 13/767 dead transitions. [2023-11-17 12:02:11,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 767 transitions, 16308 flow [2023-11-17 12:02:11,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:02:11,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:02:11,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 96 transitions. [2023-11-17 12:02:11,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48 [2023-11-17 12:02:11,468 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 96 transitions. [2023-11-17 12:02:11,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 96 transitions. [2023-11-17 12:02:11,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:11,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 96 transitions. [2023-11-17 12:02:11,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:11,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:02:11,469 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:02:11,469 INFO L175 Difference]: Start difference. First operand has 378 places, 715 transitions, 14140 flow. Second operand 10 states and 96 transitions. [2023-11-17 12:02:11,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 767 transitions, 16308 flow [2023-11-17 12:02:12,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 767 transitions, 15972 flow, removed 134 selfloop flow, removed 3 redundant places. [2023-11-17 12:02:12,288 INFO L231 Difference]: Finished difference. Result has 389 places, 730 transitions, 14409 flow [2023-11-17 12:02:12,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=13808, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=715, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14409, PETRI_PLACES=389, PETRI_TRANSITIONS=730} [2023-11-17 12:02:12,289 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 369 predicate places. [2023-11-17 12:02:12,290 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 730 transitions, 14409 flow [2023-11-17 12:02:12,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:12,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:12,290 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:12,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-17 12:02:12,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-17 12:02:12,493 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:12,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:12,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1614248572, now seen corresponding path program 42 times [2023-11-17 12:02:12,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:12,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023803077] [2023-11-17 12:02:12,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:12,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:12,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:12,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:12,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023803077] [2023-11-17 12:02:12,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023803077] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:12,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633490890] [2023-11-17 12:02:12,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:12,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:12,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:12,688 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:12,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-17 12:02:12,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 12:02:12,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:12,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:12,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:12,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:13,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:13,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633490890] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:13,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:13,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-17 12:02:13,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698628742] [2023-11-17 12:02:13,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:13,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:13,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:13,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:13,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:13,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:13,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 730 transitions, 14409 flow. Second operand has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:13,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:13,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:13,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:14,305 INFO L124 PetriNetUnfolderBase]: 1481/2533 cut-off events. [2023-11-17 12:02:14,305 INFO L125 PetriNetUnfolderBase]: For 82808/82808 co-relation queries the response was YES. [2023-11-17 12:02:14,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25154 conditions, 2533 events. 1481/2533 cut-off events. For 82808/82808 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 14817 event pairs, 63 based on Foata normal form. 1/2534 useless extension candidates. Maximal degree in co-relation 24950. Up to 2205 conditions per place. [2023-11-17 12:02:14,357 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 666 selfloop transitions, 110 changer transitions 5/781 dead transitions. [2023-11-17 12:02:14,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 781 transitions, 16609 flow [2023-11-17 12:02:14,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-17 12:02:14,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-17 12:02:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2023-11-17 12:02:14,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2023-11-17 12:02:14,358 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 108 transitions. [2023-11-17 12:02:14,358 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 108 transitions. [2023-11-17 12:02:14,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:14,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 108 transitions. [2023-11-17 12:02:14,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 9.818181818181818) internal successors, (108), 11 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,359 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 20.0) internal successors, (240), 12 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:14,359 INFO L175 Difference]: Start difference. First operand has 389 places, 730 transitions, 14409 flow. Second operand 11 states and 108 transitions. [2023-11-17 12:02:14,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 781 transitions, 16609 flow [2023-11-17 12:02:15,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 781 transitions, 16229 flow, removed 143 selfloop flow, removed 5 redundant places. [2023-11-17 12:02:15,198 INFO L231 Difference]: Finished difference. Result has 394 places, 738 transitions, 14559 flow [2023-11-17 12:02:15,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14047, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14559, PETRI_PLACES=394, PETRI_TRANSITIONS=738} [2023-11-17 12:02:15,199 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 374 predicate places. [2023-11-17 12:02:15,200 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 738 transitions, 14559 flow [2023-11-17 12:02:15,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.444444444444445) internal successors, (98), 18 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:15,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:15,200 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:15,204 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-17 12:02:15,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:15,402 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:15,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:15,402 INFO L85 PathProgramCache]: Analyzing trace with hash -608560648, now seen corresponding path program 43 times [2023-11-17 12:02:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25578478] [2023-11-17 12:02:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:15,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:15,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25578478] [2023-11-17 12:02:15,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25578478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:15,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382948821] [2023-11-17 12:02:15,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:15,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:15,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:15,602 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:15,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-17 12:02:15,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:15,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:15,725 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:15,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:15,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:16,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382948821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:16,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:16,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 16 [2023-11-17 12:02:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647752835] [2023-11-17 12:02:16,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:16,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:02:16,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:02:16,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:02:16,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:16,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 738 transitions, 14559 flow. Second operand has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:16,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:16,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:16,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:17,035 INFO L124 PetriNetUnfolderBase]: 1532/2614 cut-off events. [2023-11-17 12:02:17,035 INFO L125 PetriNetUnfolderBase]: For 86440/86440 co-relation queries the response was YES. [2023-11-17 12:02:17,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25819 conditions, 2614 events. 1532/2614 cut-off events. For 86440/86440 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 15389 event pairs, 68 based on Foata normal form. 1/2615 useless extension candidates. Maximal degree in co-relation 25622. Up to 2329 conditions per place. [2023-11-17 12:02:17,078 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 699 selfloop transitions, 92 changer transitions 7/798 dead transitions. [2023-11-17 12:02:17,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 798 transitions, 16980 flow [2023-11-17 12:02:17,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-17 12:02:17,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-11-17 12:02:17,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 89 transitions. [2023-11-17 12:02:17,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2023-11-17 12:02:17,079 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 89 transitions. [2023-11-17 12:02:17,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 89 transitions. [2023-11-17 12:02:17,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:17,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 89 transitions. [2023-11-17 12:02:17,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 11.125) internal successors, (89), 8 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 12:02:17,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,079 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,079 INFO L175 Difference]: Start difference. First operand has 394 places, 738 transitions, 14559 flow. Second operand 8 states and 89 transitions. [2023-11-17 12:02:17,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 798 transitions, 16980 flow [2023-11-17 12:02:17,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 798 transitions, 16685 flow, removed 82 selfloop flow, removed 6 redundant places. [2023-11-17 12:02:17,855 INFO L231 Difference]: Finished difference. Result has 397 places, 759 transitions, 15027 flow [2023-11-17 12:02:17,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14270, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=646, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=15027, PETRI_PLACES=397, PETRI_TRANSITIONS=759} [2023-11-17 12:02:17,856 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 377 predicate places. [2023-11-17 12:02:17,856 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 759 transitions, 15027 flow [2023-11-17 12:02:17,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.555555555555555) internal successors, (100), 18 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:17,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:17,856 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:17,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:18,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:18,062 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:18,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:18,062 INFO L85 PathProgramCache]: Analyzing trace with hash -181802768, now seen corresponding path program 44 times [2023-11-17 12:02:18,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:18,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350447825] [2023-11-17 12:02:18,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:18,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:18,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350447825] [2023-11-17 12:02:18,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350447825] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:18,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657944589] [2023-11-17 12:02:18,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:18,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:18,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:18,221 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:18,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-17 12:02:18,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:18,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:18,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:18,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:18,432 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657944589] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:18,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-17 12:02:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602122209] [2023-11-17 12:02:18,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:18,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:02:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:02:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:02:18,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:18,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 759 transitions, 15027 flow. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:18,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:18,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:18,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:19,690 INFO L124 PetriNetUnfolderBase]: 1527/2603 cut-off events. [2023-11-17 12:02:19,691 INFO L125 PetriNetUnfolderBase]: For 83821/83821 co-relation queries the response was YES. [2023-11-17 12:02:19,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25667 conditions, 2603 events. 1527/2603 cut-off events. For 83821/83821 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 15267 event pairs, 69 based on Foata normal form. 1/2604 useless extension candidates. Maximal degree in co-relation 25471. Up to 2227 conditions per place. [2023-11-17 12:02:19,739 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 685 selfloop transitions, 109 changer transitions 5/799 dead transitions. [2023-11-17 12:02:19,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 799 transitions, 17043 flow [2023-11-17 12:02:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 12:02:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 12:02:19,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 100 transitions. [2023-11-17 12:02:19,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-11-17 12:02:19,740 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 100 transitions. [2023-11-17 12:02:19,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 100 transitions. [2023-11-17 12:02:19,740 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:19,740 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 100 transitions. [2023-11-17 12:02:19,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 10.0) internal successors, (100), 10 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:19,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:02:19,741 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 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 12:02:19,741 INFO L175 Difference]: Start difference. First operand has 397 places, 759 transitions, 15027 flow. Second operand 10 states and 100 transitions. [2023-11-17 12:02:19,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 799 transitions, 17043 flow [2023-11-17 12:02:20,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 799 transitions, 16735 flow, removed 86 selfloop flow, removed 5 redundant places. [2023-11-17 12:02:20,802 INFO L231 Difference]: Finished difference. Result has 403 places, 762 transitions, 15104 flow [2023-11-17 12:02:20,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14725, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=759, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15104, PETRI_PLACES=403, PETRI_TRANSITIONS=762} [2023-11-17 12:02:20,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-11-17 12:02:20,803 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 762 transitions, 15104 flow [2023-11-17 12:02:20,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:20,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:20,804 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:20,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:21,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-17 12:02:21,010 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:21,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -686862928, now seen corresponding path program 45 times [2023-11-17 12:02:21,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:21,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232706276] [2023-11-17 12:02:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:21,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:21,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:21,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232706276] [2023-11-17 12:02:21,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232706276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:21,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741058664] [2023-11-17 12:02:21,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:21,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:21,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:21,227 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:21,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-17 12:02:21,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:02:21,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:21,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-17 12:02:21,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:21,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:21,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741058664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:21,702 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:21,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 15 [2023-11-17 12:02:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269435619] [2023-11-17 12:02:21,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:21,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:02:21,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:21,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:02:21,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:02:21,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:21,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 762 transitions, 15104 flow. Second operand has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:21,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:21,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:21,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:23,103 INFO L124 PetriNetUnfolderBase]: 1524/2594 cut-off events. [2023-11-17 12:02:23,103 INFO L125 PetriNetUnfolderBase]: For 80142/80142 co-relation queries the response was YES. [2023-11-17 12:02:23,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25482 conditions, 2594 events. 1524/2594 cut-off events. For 80142/80142 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 15187 event pairs, 65 based on Foata normal form. 1/2595 useless extension candidates. Maximal degree in co-relation 25287. Up to 2320 conditions per place. [2023-11-17 12:02:23,158 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 700 selfloop transitions, 90 changer transitions 7/797 dead transitions. [2023-11-17 12:02:23,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 797 transitions, 16939 flow [2023-11-17 12:02:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:02:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:02:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 92 transitions. [2023-11-17 12:02:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111111111111111 [2023-11-17 12:02:23,160 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 92 transitions. [2023-11-17 12:02:23,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 92 transitions. [2023-11-17 12:02:23,160 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:23,160 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 92 transitions. [2023-11-17 12:02:23,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,161 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:23,161 INFO L175 Difference]: Start difference. First operand has 403 places, 762 transitions, 15104 flow. Second operand 9 states and 92 transitions. [2023-11-17 12:02:23,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 797 transitions, 16939 flow [2023-11-17 12:02:24,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 797 transitions, 16644 flow, removed 56 selfloop flow, removed 7 redundant places. [2023-11-17 12:02:24,229 INFO L231 Difference]: Finished difference. Result has 405 places, 764 transitions, 15098 flow [2023-11-17 12:02:24,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14813, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=762, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15098, PETRI_PLACES=405, PETRI_TRANSITIONS=764} [2023-11-17 12:02:24,230 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 385 predicate places. [2023-11-17 12:02:24,231 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 764 transitions, 15098 flow [2023-11-17 12:02:24,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.470588235294118) internal successors, (93), 17 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:24,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:24,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:24,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-17 12:02:24,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-17 12:02:24,438 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:24,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1780121469, now seen corresponding path program 46 times [2023-11-17 12:02:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:24,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47058126] [2023-11-17 12:02:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:24,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:24,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:24,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47058126] [2023-11-17 12:02:24,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47058126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:24,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317135706] [2023-11-17 12:02:24,530 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:24,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:24,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:24,532 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:24,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-17 12:02:24,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:24,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:24,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:24,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:24,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:24,755 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317135706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:24,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:02:24,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940629155] [2023-11-17 12:02:24,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:02:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:24,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:02:24,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:02:24,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:24,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 764 transitions, 15098 flow. Second operand has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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 12:02:24,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:24,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:24,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:26,328 INFO L124 PetriNetUnfolderBase]: 1864/3197 cut-off events. [2023-11-17 12:02:26,328 INFO L125 PetriNetUnfolderBase]: For 100613/100613 co-relation queries the response was YES. [2023-11-17 12:02:26,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30993 conditions, 3197 events. 1864/3197 cut-off events. For 100613/100613 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 19462 event pairs, 342 based on Foata normal form. 4/3201 useless extension candidates. Maximal degree in co-relation 30779. Up to 1904 conditions per place. [2023-11-17 12:02:26,404 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 714 selfloop transitions, 246 changer transitions 15/975 dead transitions. [2023-11-17 12:02:26,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 975 transitions, 20906 flow [2023-11-17 12:02:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:02:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:02:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 86 transitions. [2023-11-17 12:02:26,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4777777777777778 [2023-11-17 12:02:26,406 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 86 transitions. [2023-11-17 12:02:26,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 86 transitions. [2023-11-17 12:02:26,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:26,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 86 transitions. [2023-11-17 12:02:26,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,406 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,406 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:26,406 INFO L175 Difference]: Start difference. First operand has 405 places, 764 transitions, 15098 flow. Second operand 9 states and 86 transitions. [2023-11-17 12:02:26,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 975 transitions, 20906 flow [2023-11-17 12:02:27,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 975 transitions, 20639 flow, removed 40 selfloop flow, removed 7 redundant places. [2023-11-17 12:02:27,813 INFO L231 Difference]: Finished difference. Result has 410 places, 851 transitions, 17460 flow [2023-11-17 12:02:27,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=14911, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=764, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17460, PETRI_PLACES=410, PETRI_TRANSITIONS=851} [2023-11-17 12:02:27,816 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 390 predicate places. [2023-11-17 12:02:27,816 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 851 transitions, 17460 flow [2023-11-17 12:02:27,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.285714285714286) internal successors, (74), 14 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 12:02:27,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:27,817 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:27,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-17 12:02:28,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-17 12:02:28,026 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:28,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:28,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1445516508, now seen corresponding path program 47 times [2023-11-17 12:02:28,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:28,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235484063] [2023-11-17 12:02:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:28,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:28,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:28,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:28,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235484063] [2023-11-17 12:02:28,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235484063] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:28,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101089961] [2023-11-17 12:02:28,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:28,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:28,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:28,135 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:28,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-17 12:02:28,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:02:28,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:28,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:28,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:28,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:28,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:28,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101089961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:28,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:28,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:02:28,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080893208] [2023-11-17 12:02:28,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:28,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:02:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:02:28,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:02:28,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:28,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 851 transitions, 17460 flow. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 12:02:28,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:28,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:28,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:30,236 INFO L124 PetriNetUnfolderBase]: 2027/3468 cut-off events. [2023-11-17 12:02:30,236 INFO L125 PetriNetUnfolderBase]: For 115710/115710 co-relation queries the response was YES. [2023-11-17 12:02:30,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34366 conditions, 3468 events. 2027/3468 cut-off events. For 115710/115710 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 21356 event pairs, 119 based on Foata normal form. 14/3482 useless extension candidates. Maximal degree in co-relation 34033. Up to 1037 conditions per place. [2023-11-17 12:02:30,338 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 634 selfloop transitions, 425 changer transitions 0/1059 dead transitions. [2023-11-17 12:02:30,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 1059 transitions, 23360 flow [2023-11-17 12:02:30,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:02:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:02:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 118 transitions. [2023-11-17 12:02:30,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45384615384615384 [2023-11-17 12:02:30,340 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 118 transitions. [2023-11-17 12:02:30,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 118 transitions. [2023-11-17 12:02:30,340 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:30,340 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 118 transitions. [2023-11-17 12:02:30,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 9.076923076923077) internal successors, (118), 13 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,341 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:30,341 INFO L175 Difference]: Start difference. First operand has 410 places, 851 transitions, 17460 flow. Second operand 13 states and 118 transitions. [2023-11-17 12:02:30,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 1059 transitions, 23360 flow [2023-11-17 12:02:31,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1059 transitions, 22949 flow, removed 67 selfloop flow, removed 7 redundant places. [2023-11-17 12:02:31,966 INFO L231 Difference]: Finished difference. Result has 419 places, 918 transitions, 19716 flow [2023-11-17 12:02:31,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=17057, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=19716, PETRI_PLACES=419, PETRI_TRANSITIONS=918} [2023-11-17 12:02:31,967 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 399 predicate places. [2023-11-17 12:02:31,967 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 918 transitions, 19716 flow [2023-11-17 12:02:31,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 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 12:02:31,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:31,968 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:31,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:32,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:32,175 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:32,175 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:32,175 INFO L85 PathProgramCache]: Analyzing trace with hash -245923308, now seen corresponding path program 48 times [2023-11-17 12:02:32,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:32,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196406929] [2023-11-17 12:02:32,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:32,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:32,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:32,269 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:32,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196406929] [2023-11-17 12:02:32,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196406929] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:32,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309199559] [2023-11-17 12:02:32,270 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:02:32,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:32,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:32,283 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:32,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-17 12:02:32,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:02:32,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:32,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:32,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:32,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:32,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309199559] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:32,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:32,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:02:32,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607105814] [2023-11-17 12:02:32,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:32,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:02:32,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:32,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:02:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:02:32,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:32,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 918 transitions, 19716 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:32,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:32,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:32,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:34,517 INFO L124 PetriNetUnfolderBase]: 2182/3689 cut-off events. [2023-11-17 12:02:34,518 INFO L125 PetriNetUnfolderBase]: For 142736/142736 co-relation queries the response was YES. [2023-11-17 12:02:34,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39033 conditions, 3689 events. 2182/3689 cut-off events. For 142736/142736 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 22810 event pairs, 240 based on Foata normal form. 10/3699 useless extension candidates. Maximal degree in co-relation 38689. Up to 1526 conditions per place. [2023-11-17 12:02:34,629 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 568 selfloop transitions, 471 changer transitions 3/1042 dead transitions. [2023-11-17 12:02:34,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1042 transitions, 25145 flow [2023-11-17 12:02:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:02:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:02:34,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2023-11-17 12:02:34,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2023-11-17 12:02:34,630 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 149 transitions. [2023-11-17 12:02:34,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 149 transitions. [2023-11-17 12:02:34,630 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:34,630 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 149 transitions. [2023-11-17 12:02:34,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:34,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:34,631 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:34,631 INFO L175 Difference]: Start difference. First operand has 419 places, 918 transitions, 19716 flow. Second operand 19 states and 149 transitions. [2023-11-17 12:02:34,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1042 transitions, 25145 flow [2023-11-17 12:02:36,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1042 transitions, 24425 flow, removed 162 selfloop flow, removed 4 redundant places. [2023-11-17 12:02:36,440 INFO L231 Difference]: Finished difference. Result has 439 places, 1002 transitions, 23141 flow [2023-11-17 12:02:36,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=19153, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=918, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=23141, PETRI_PLACES=439, PETRI_TRANSITIONS=1002} [2023-11-17 12:02:36,442 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 419 predicate places. [2023-11-17 12:02:36,442 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 1002 transitions, 23141 flow [2023-11-17 12:02:36,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:36,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:36,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:36,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-17 12:02:36,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-17 12:02:36,649 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:36,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:36,649 INFO L85 PathProgramCache]: Analyzing trace with hash -119792127, now seen corresponding path program 49 times [2023-11-17 12:02:36,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:36,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018077004] [2023-11-17 12:02:36,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:36,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:36,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:36,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018077004] [2023-11-17 12:02:36,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018077004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:36,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483153870] [2023-11-17 12:02:36,739 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:02:36,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:36,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:36,745 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:36,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-17 12:02:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:36,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:36,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:36,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:36,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483153870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:36,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:36,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:02:36,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832814598] [2023-11-17 12:02:36,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:36,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:02:36,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:36,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:02:36,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:02:36,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:36,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 1002 transitions, 23141 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:36,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:36,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:36,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:39,067 INFO L124 PetriNetUnfolderBase]: 2362/3947 cut-off events. [2023-11-17 12:02:39,068 INFO L125 PetriNetUnfolderBase]: For 187848/187848 co-relation queries the response was YES. [2023-11-17 12:02:39,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 3947 events. 2362/3947 cut-off events. For 187848/187848 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 24392 event pairs, 403 based on Foata normal form. 28/3975 useless extension candidates. Maximal degree in co-relation 44019. Up to 2631 conditions per place. [2023-11-17 12:02:39,137 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 778 selfloop transitions, 423 changer transitions 15/1216 dead transitions. [2023-11-17 12:02:39,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 1216 transitions, 30851 flow [2023-11-17 12:02:39,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:02:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:02:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 141 transitions. [2023-11-17 12:02:39,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147058823529412 [2023-11-17 12:02:39,138 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 141 transitions. [2023-11-17 12:02:39,138 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 141 transitions. [2023-11-17 12:02:39,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:39,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 141 transitions. [2023-11-17 12:02:39,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 8.294117647058824) internal successors, (141), 17 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,139 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:39,139 INFO L175 Difference]: Start difference. First operand has 439 places, 1002 transitions, 23141 flow. Second operand 17 states and 141 transitions. [2023-11-17 12:02:39,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 1216 transitions, 30851 flow [2023-11-17 12:02:40,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1216 transitions, 28177 flow, removed 995 selfloop flow, removed 11 redundant places. [2023-11-17 12:02:40,898 INFO L231 Difference]: Finished difference. Result has 450 places, 1101 transitions, 25116 flow [2023-11-17 12:02:40,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=21205, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1002, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=319, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=25116, PETRI_PLACES=450, PETRI_TRANSITIONS=1101} [2023-11-17 12:02:40,899 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 430 predicate places. [2023-11-17 12:02:40,899 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 1101 transitions, 25116 flow [2023-11-17 12:02:40,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:40,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:40,900 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:40,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:41,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:41,106 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:41,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash 867955502, now seen corresponding path program 50 times [2023-11-17 12:02:41,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:41,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390019551] [2023-11-17 12:02:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:41,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:41,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:41,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390019551] [2023-11-17 12:02:41,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390019551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536284933] [2023-11-17 12:02:41,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:02:41,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:41,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:41,183 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:41,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-17 12:02:41,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:02:41,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:41,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:41,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:41,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:41,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536284933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:41,403 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:41,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:02:41,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454591899] [2023-11-17 12:02:41,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:41,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:02:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:02:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:02:41,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:41,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 1101 transitions, 25116 flow. Second operand has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:41,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:41,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:41,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:43,252 INFO L124 PetriNetUnfolderBase]: 2391/3992 cut-off events. [2023-11-17 12:02:43,252 INFO L125 PetriNetUnfolderBase]: For 153217/153217 co-relation queries the response was YES. [2023-11-17 12:02:43,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43718 conditions, 3992 events. 2391/3992 cut-off events. For 153217/153217 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 24412 event pairs, 204 based on Foata normal form. 22/4014 useless extension candidates. Maximal degree in co-relation 43383. Up to 1786 conditions per place. [2023-11-17 12:02:43,342 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 752 selfloop transitions, 421 changer transitions 0/1173 dead transitions. [2023-11-17 12:02:43,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1173 transitions, 28429 flow [2023-11-17 12:02:43,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:02:43,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:02:43,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 152 transitions. [2023-11-17 12:02:43,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2023-11-17 12:02:43,343 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 152 transitions. [2023-11-17 12:02:43,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 152 transitions. [2023-11-17 12:02:43,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:43,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 152 transitions. [2023-11-17 12:02:43,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 8.0) internal successors, (152), 19 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:43,344 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:43,344 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:43,344 INFO L175 Difference]: Start difference. First operand has 450 places, 1101 transitions, 25116 flow. Second operand 19 states and 152 transitions. [2023-11-17 12:02:43,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1173 transitions, 28429 flow [2023-11-17 12:02:45,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 1173 transitions, 26800 flow, removed 434 selfloop flow, removed 10 redundant places. [2023-11-17 12:02:45,169 INFO L231 Difference]: Finished difference. Result has 463 places, 1124 transitions, 24959 flow [2023-11-17 12:02:45,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=23399, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1097, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=397, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=24959, PETRI_PLACES=463, PETRI_TRANSITIONS=1124} [2023-11-17 12:02:45,170 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 443 predicate places. [2023-11-17 12:02:45,170 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 1124 transitions, 24959 flow [2023-11-17 12:02:45,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.1875) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:45,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:45,171 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:45,185 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:45,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:45,376 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:45,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:45,377 INFO L85 PathProgramCache]: Analyzing trace with hash -363260770, now seen corresponding path program 51 times [2023-11-17 12:02:45,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:45,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018074595] [2023-11-17 12:02:45,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:45,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:45,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:45,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:45,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018074595] [2023-11-17 12:02:45,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018074595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:45,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714267293] [2023-11-17 12:02:45,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:02:45,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:45,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:45,448 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:45,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-17 12:02:45,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:02:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:45,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:45,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:45,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:45,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:45,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714267293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:45,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:45,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:02:45,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654437088] [2023-11-17 12:02:45,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:45,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:02:45,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:45,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:02:45,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:02:45,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:45,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 1124 transitions, 24959 flow. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:45,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:45,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:45,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:47,762 INFO L124 PetriNetUnfolderBase]: 2510/4209 cut-off events. [2023-11-17 12:02:47,762 INFO L125 PetriNetUnfolderBase]: For 152033/152033 co-relation queries the response was YES. [2023-11-17 12:02:47,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44903 conditions, 4209 events. 2510/4209 cut-off events. For 152033/152033 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 26137 event pairs, 184 based on Foata normal form. 36/4245 useless extension candidates. Maximal degree in co-relation 44565. Up to 1675 conditions per place. [2023-11-17 12:02:47,833 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 705 selfloop transitions, 515 changer transitions 0/1220 dead transitions. [2023-11-17 12:02:47,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 1220 transitions, 28906 flow [2023-11-17 12:02:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:02:47,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:02:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 167 transitions. [2023-11-17 12:02:47,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2023-11-17 12:02:47,834 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 167 transitions. [2023-11-17 12:02:47,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 167 transitions. [2023-11-17 12:02:47,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:47,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 167 transitions. [2023-11-17 12:02:47,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.9523809523809526) internal successors, (167), 21 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,835 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:47,836 INFO L175 Difference]: Start difference. First operand has 463 places, 1124 transitions, 24959 flow. Second operand 21 states and 167 transitions. [2023-11-17 12:02:47,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 1220 transitions, 28906 flow [2023-11-17 12:02:49,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 1220 transitions, 28455 flow, removed 145 selfloop flow, removed 4 redundant places. [2023-11-17 12:02:49,469 INFO L231 Difference]: Finished difference. Result has 484 places, 1171 transitions, 26930 flow [2023-11-17 12:02:49,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=24491, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=469, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=26930, PETRI_PLACES=484, PETRI_TRANSITIONS=1171} [2023-11-17 12:02:49,471 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 464 predicate places. [2023-11-17 12:02:49,471 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 1171 transitions, 26930 flow [2023-11-17 12:02:49,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:49,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:49,472 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:49,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-17 12:02:49,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:49,676 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:49,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:49,677 INFO L85 PathProgramCache]: Analyzing trace with hash 869853946, now seen corresponding path program 52 times [2023-11-17 12:02:49,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:49,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008094018] [2023-11-17 12:02:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:49,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:49,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008094018] [2023-11-17 12:02:49,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008094018] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:49,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323805581] [2023-11-17 12:02:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:02:49,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:49,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:49,743 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:49,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-17 12:02:49,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:02:49,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:49,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:49,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:49,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:49,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323805581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:49,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:49,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:02:49,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970545528] [2023-11-17 12:02:49,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:49,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:02:49,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:49,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:02:49,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:02:49,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:49,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 1171 transitions, 26930 flow. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 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 12:02:49,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:49,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:49,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:52,116 INFO L124 PetriNetUnfolderBase]: 2535/4280 cut-off events. [2023-11-17 12:02:52,116 INFO L125 PetriNetUnfolderBase]: For 159727/159727 co-relation queries the response was YES. [2023-11-17 12:02:52,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46550 conditions, 4280 events. 2535/4280 cut-off events. For 159727/159727 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27006 event pairs, 178 based on Foata normal form. 24/4304 useless extension candidates. Maximal degree in co-relation 46205. Up to 1460 conditions per place. [2023-11-17 12:02:52,190 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 597 selfloop transitions, 625 changer transitions 0/1222 dead transitions. [2023-11-17 12:02:52,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1222 transitions, 29878 flow [2023-11-17 12:02:52,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:02:52,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:02:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 187 transitions. [2023-11-17 12:02:52,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38958333333333334 [2023-11-17 12:02:52,191 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 187 transitions. [2023-11-17 12:02:52,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 187 transitions. [2023-11-17 12:02:52,191 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:52,191 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 187 transitions. [2023-11-17 12:02:52,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.791666666666667) internal successors, (187), 24 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,192 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:52,192 INFO L175 Difference]: Start difference. First operand has 484 places, 1171 transitions, 26930 flow. Second operand 24 states and 187 transitions. [2023-11-17 12:02:52,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1222 transitions, 29878 flow [2023-11-17 12:02:53,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 1222 transitions, 29369 flow, removed 135 selfloop flow, removed 11 redundant places. [2023-11-17 12:02:53,813 INFO L231 Difference]: Finished difference. Result has 497 places, 1177 transitions, 27974 flow [2023-11-17 12:02:53,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26212, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=611, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=27974, PETRI_PLACES=497, PETRI_TRANSITIONS=1177} [2023-11-17 12:02:53,814 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 477 predicate places. [2023-11-17 12:02:53,814 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1177 transitions, 27974 flow [2023-11-17 12:02:53,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 15 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 12:02:53,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:53,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:53,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-17 12:02:54,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:54,019 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:54,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash -554224245, now seen corresponding path program 53 times [2023-11-17 12:02:54,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:54,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648460087] [2023-11-17 12:02:54,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:54,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:02:54,091 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:54,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:02:54,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648460087] [2023-11-17 12:02:54,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648460087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:02:54,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52074393] [2023-11-17 12:02:54,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:02:54,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:02:54,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:02:54,093 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:02:54,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-17 12:02:54,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:02:54,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:02:54,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:02:54,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:02:54,250 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:54,250 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:02:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:02:54,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52074393] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:02:54,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:02:54,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:02:54,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900457437] [2023-11-17 12:02:54,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:02:54,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:02:54,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:02:54,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:02:54,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:02:54,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:02:54,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1177 transitions, 27974 flow. Second operand has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:54,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:02:54,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:02:54,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:02:56,946 INFO L124 PetriNetUnfolderBase]: 2534/4283 cut-off events. [2023-11-17 12:02:56,946 INFO L125 PetriNetUnfolderBase]: For 158215/158215 co-relation queries the response was YES. [2023-11-17 12:02:57,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47738 conditions, 4283 events. 2534/4283 cut-off events. For 158215/158215 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 26969 event pairs, 529 based on Foata normal form. 4/4287 useless extension candidates. Maximal degree in co-relation 47391. Up to 3289 conditions per place. [2023-11-17 12:02:57,064 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 966 selfloop transitions, 280 changer transitions 15/1261 dead transitions. [2023-11-17 12:02:57,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 1261 transitions, 31812 flow [2023-11-17 12:02:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:02:57,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:02:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 123 transitions. [2023-11-17 12:02:57,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41 [2023-11-17 12:02:57,065 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 123 transitions. [2023-11-17 12:02:57,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 123 transitions. [2023-11-17 12:02:57,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:02:57,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 123 transitions. [2023-11-17 12:02:57,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 8.2) internal successors, (123), 15 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:57,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:57,066 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:57,067 INFO L175 Difference]: Start difference. First operand has 497 places, 1177 transitions, 27974 flow. Second operand 15 states and 123 transitions. [2023-11-17 12:02:57,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 1261 transitions, 31812 flow [2023-11-17 12:02:59,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1261 transitions, 30830 flow, removed 62 selfloop flow, removed 19 redundant places. [2023-11-17 12:02:59,685 INFO L231 Difference]: Finished difference. Result has 493 places, 1168 transitions, 27326 flow [2023-11-17 12:02:59,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26996, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=897, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=27326, PETRI_PLACES=493, PETRI_TRANSITIONS=1168} [2023-11-17 12:02:59,686 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 473 predicate places. [2023-11-17 12:02:59,687 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1168 transitions, 27326 flow [2023-11-17 12:02:59,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.0) internal successors, (80), 16 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:02:59,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:02:59,687 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:02:59,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-17 12:02:59,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-17 12:02:59,893 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:02:59,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:02:59,894 INFO L85 PathProgramCache]: Analyzing trace with hash 472852769, now seen corresponding path program 54 times [2023-11-17 12:02:59,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:02:59,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714803481] [2023-11-17 12:02:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:02:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:02:59,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:00,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714803481] [2023-11-17 12:03:00,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714803481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:00,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852383052] [2023-11-17 12:03:00,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:03:00,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:00,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:00,022 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:00,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-17 12:03:00,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-17 12:03:00,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:00,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:00,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:00,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852383052] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:00,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:00,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:03:00,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042942137] [2023-11-17 12:03:00,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:00,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:03:00,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:00,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:03:00,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:03:00,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:00,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1168 transitions, 27326 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:00,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:00,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:00,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:03,475 INFO L124 PetriNetUnfolderBase]: 2641/4406 cut-off events. [2023-11-17 12:03:03,476 INFO L125 PetriNetUnfolderBase]: For 173420/173420 co-relation queries the response was YES. [2023-11-17 12:03:03,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49772 conditions, 4406 events. 2641/4406 cut-off events. For 173420/173420 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 27422 event pairs, 484 based on Foata normal form. 26/4432 useless extension candidates. Maximal degree in co-relation 49531. Up to 3110 conditions per place. [2023-11-17 12:03:03,583 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 797 selfloop transitions, 546 changer transitions 1/1344 dead transitions. [2023-11-17 12:03:03,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 1344 transitions, 33910 flow [2023-11-17 12:03:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-17 12:03:03,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-11-17 12:03:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 203 transitions. [2023-11-17 12:03:03,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625 [2023-11-17 12:03:03,584 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 203 transitions. [2023-11-17 12:03:03,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 203 transitions. [2023-11-17 12:03:03,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:03,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 203 transitions. [2023-11-17 12:03:03,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 7.25) internal successors, (203), 28 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:03,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 20.0) internal successors, (580), 29 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:03,586 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 20.0) internal successors, (580), 29 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:03,586 INFO L175 Difference]: Start difference. First operand has 493 places, 1168 transitions, 27326 flow. Second operand 28 states and 203 transitions. [2023-11-17 12:03:03,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 1344 transitions, 33910 flow [2023-11-17 12:03:05,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1344 transitions, 33317 flow, removed 15 selfloop flow, removed 15 redundant places. [2023-11-17 12:03:05,813 INFO L231 Difference]: Finished difference. Result has 509 places, 1258 transitions, 30964 flow [2023-11-17 12:03:05,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=26393, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=30964, PETRI_PLACES=509, PETRI_TRANSITIONS=1258} [2023-11-17 12:03:05,815 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 489 predicate places. [2023-11-17 12:03:05,815 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 1258 transitions, 30964 flow [2023-11-17 12:03:05,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:05,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:05,815 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:05,822 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:06,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-17 12:03:06,022 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:06,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:06,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1490656863, now seen corresponding path program 55 times [2023-11-17 12:03:06,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:06,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41328845] [2023-11-17 12:03:06,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:06,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:06,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:06,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41328845] [2023-11-17 12:03:06,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41328845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:06,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521216082] [2023-11-17 12:03:06,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:03:06,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:06,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:06,135 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:06,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-17 12:03:06,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:06,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:06,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:06,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521216082] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:06,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:06,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:03:06,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826842488] [2023-11-17 12:03:06,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:03:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:03:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:03:06,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:06,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 1258 transitions, 30964 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:06,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:06,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:06,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:09,684 INFO L124 PetriNetUnfolderBase]: 2616/4377 cut-off events. [2023-11-17 12:03:09,684 INFO L125 PetriNetUnfolderBase]: For 179013/179013 co-relation queries the response was YES. [2023-11-17 12:03:09,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51209 conditions, 4377 events. 2616/4377 cut-off events. For 179013/179013 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27324 event pairs, 469 based on Foata normal form. 36/4413 useless extension candidates. Maximal degree in co-relation 50853. Up to 3025 conditions per place. [2023-11-17 12:03:09,801 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 810 selfloop transitions, 510 changer transitions 12/1332 dead transitions. [2023-11-17 12:03:09,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 1332 transitions, 34949 flow [2023-11-17 12:03:09,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:03:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:03:09,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2023-11-17 12:03:09,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2023-11-17 12:03:09,803 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 149 transitions. [2023-11-17 12:03:09,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 149 transitions. [2023-11-17 12:03:09,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:09,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 149 transitions. [2023-11-17 12:03:09,804 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,804 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:09,804 INFO L175 Difference]: Start difference. First operand has 509 places, 1258 transitions, 30964 flow. Second operand 19 states and 149 transitions. [2023-11-17 12:03:09,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 1332 transitions, 34949 flow [2023-11-17 12:03:12,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 515 places, 1332 transitions, 33667 flow, removed 574 selfloop flow, removed 11 redundant places. [2023-11-17 12:03:12,176 INFO L231 Difference]: Finished difference. Result has 516 places, 1243 transitions, 30435 flow [2023-11-17 12:03:12,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29592, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=508, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=30435, PETRI_PLACES=516, PETRI_TRANSITIONS=1243} [2023-11-17 12:03:12,178 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 496 predicate places. [2023-11-17 12:03:12,178 INFO L495 AbstractCegarLoop]: Abstraction has has 516 places, 1243 transitions, 30435 flow [2023-11-17 12:03:12,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:12,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:12,178 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:12,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:12,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-11-17 12:03:12,384 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:12,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:12,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1392183468, now seen corresponding path program 56 times [2023-11-17 12:03:12,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:12,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527359224] [2023-11-17 12:03:12,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:12,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:03:12,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:12,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527359224] [2023-11-17 12:03:12,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527359224] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:12,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796311614] [2023-11-17 12:03:12,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:03:12,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:12,460 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:12,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-17 12:03:12,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:12,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:12,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:12,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:12,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:03:12,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796311614] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:12,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-11-17 12:03:12,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005675817] [2023-11-17 12:03:12,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:12,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:03:12,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:12,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:03:12,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:03:12,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:12,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 516 places, 1243 transitions, 30435 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:12,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:12,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:12,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:15,349 INFO L124 PetriNetUnfolderBase]: 2916/4771 cut-off events. [2023-11-17 12:03:15,349 INFO L125 PetriNetUnfolderBase]: For 197569/197569 co-relation queries the response was YES. [2023-11-17 12:03:15,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57412 conditions, 4771 events. 2916/4771 cut-off events. For 197569/197569 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 29360 event pairs, 271 based on Foata normal form. 16/4787 useless extension candidates. Maximal degree in co-relation 57049. Up to 1875 conditions per place. [2023-11-17 12:03:15,443 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 687 selfloop transitions, 751 changer transitions 5/1443 dead transitions. [2023-11-17 12:03:15,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 533 places, 1443 transitions, 39187 flow [2023-11-17 12:03:15,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 12:03:15,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 12:03:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 153 transitions. [2023-11-17 12:03:15,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3825 [2023-11-17 12:03:15,444 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 153 transitions. [2023-11-17 12:03:15,444 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 153 transitions. [2023-11-17 12:03:15,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:15,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 153 transitions. [2023-11-17 12:03:15,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 7.65) internal successors, (153), 20 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:15,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 20.0) internal successors, (420), 21 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:15,445 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 20.0) internal successors, (420), 21 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:15,445 INFO L175 Difference]: Start difference. First operand has 516 places, 1243 transitions, 30435 flow. Second operand 20 states and 153 transitions. [2023-11-17 12:03:15,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 533 places, 1443 transitions, 39187 flow [2023-11-17 12:03:17,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 1443 transitions, 38129 flow, removed 48 selfloop flow, removed 17 redundant places. [2023-11-17 12:03:17,779 INFO L231 Difference]: Finished difference. Result has 520 places, 1397 transitions, 36607 flow [2023-11-17 12:03:17,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=29444, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=596, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=36607, PETRI_PLACES=520, PETRI_TRANSITIONS=1397} [2023-11-17 12:03:17,780 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 500 predicate places. [2023-11-17 12:03:17,780 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 1397 transitions, 36607 flow [2023-11-17 12:03:17,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:17,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:17,780 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:17,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:17,987 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:17,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:17,987 INFO L85 PathProgramCache]: Analyzing trace with hash 401983458, now seen corresponding path program 57 times [2023-11-17 12:03:17,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:17,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808584179] [2023-11-17 12:03:17,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:17,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:18,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:18,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:18,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808584179] [2023-11-17 12:03:18,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808584179] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:18,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581243909] [2023-11-17 12:03:18,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:03:18,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:18,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:18,060 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:18,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-17 12:03:18,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 12:03:18,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:18,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:18,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:18,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:18,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:18,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581243909] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:18,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:18,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:03:18,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836073279] [2023-11-17 12:03:18,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:18,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:03:18,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:18,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:03:18,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:03:18,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:18,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 1397 transitions, 36607 flow. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:18,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:18,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:18,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:21,011 INFO L124 PetriNetUnfolderBase]: 2979/4864 cut-off events. [2023-11-17 12:03:21,012 INFO L125 PetriNetUnfolderBase]: For 219244/219244 co-relation queries the response was YES. [2023-11-17 12:03:21,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60329 conditions, 4864 events. 2979/4864 cut-off events. For 219244/219244 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 29967 event pairs, 267 based on Foata normal form. 6/4870 useless extension candidates. Maximal degree in co-relation 59973. Up to 1899 conditions per place. [2023-11-17 12:03:21,129 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 702 selfloop transitions, 769 changer transitions 8/1479 dead transitions. [2023-11-17 12:03:21,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 1479 transitions, 41890 flow [2023-11-17 12:03:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 12:03:21,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 12:03:21,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 156 transitions. [2023-11-17 12:03:21,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37142857142857144 [2023-11-17 12:03:21,130 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 156 transitions. [2023-11-17 12:03:21,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 156 transitions. [2023-11-17 12:03:21,130 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:21,130 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 156 transitions. [2023-11-17 12:03:21,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 7.428571428571429) internal successors, (156), 21 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:21,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:21,131 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 20.0) internal successors, (440), 22 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:21,131 INFO L175 Difference]: Start difference. First operand has 520 places, 1397 transitions, 36607 flow. Second operand 21 states and 156 transitions. [2023-11-17 12:03:21,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 1479 transitions, 41890 flow [2023-11-17 12:03:23,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 1479 transitions, 39705 flow, removed 825 selfloop flow, removed 11 redundant places. [2023-11-17 12:03:23,713 INFO L231 Difference]: Finished difference. Result has 535 places, 1432 transitions, 38297 flow [2023-11-17 12:03:23,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=35018, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=727, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=38297, PETRI_PLACES=535, PETRI_TRANSITIONS=1432} [2023-11-17 12:03:23,714 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 515 predicate places. [2023-11-17 12:03:23,714 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1432 transitions, 38297 flow [2023-11-17 12:03:23,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:23,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:23,714 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:23,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:23,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:23,920 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1024917730, now seen corresponding path program 58 times [2023-11-17 12:03:23,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:23,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770591979] [2023-11-17 12:03:23,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:23,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:24,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:24,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770591979] [2023-11-17 12:03:24,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770591979] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:24,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784193542] [2023-11-17 12:03:24,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:03:24,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:24,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:24,060 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:24,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-17 12:03:24,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:03:24,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:24,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:24,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:24,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:24,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:24,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784193542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:24,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:24,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-17 12:03:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702868170] [2023-11-17 12:03:24,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:24,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:03:24,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:03:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:03:24,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:24,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1432 transitions, 38297 flow. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:24,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:24,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:24,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:27,204 INFO L124 PetriNetUnfolderBase]: 3221/5300 cut-off events. [2023-11-17 12:03:27,205 INFO L125 PetriNetUnfolderBase]: For 226583/226583 co-relation queries the response was YES. [2023-11-17 12:03:27,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64914 conditions, 5300 events. 3221/5300 cut-off events. For 226583/226583 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 33403 event pairs, 192 based on Foata normal form. 12/5312 useless extension candidates. Maximal degree in co-relation 64691. Up to 2605 conditions per place. [2023-11-17 12:03:27,299 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1019 selfloop transitions, 573 changer transitions 0/1592 dead transitions. [2023-11-17 12:03:27,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1592 transitions, 44716 flow [2023-11-17 12:03:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-17 12:03:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-17 12:03:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 219 transitions. [2023-11-17 12:03:27,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3775862068965517 [2023-11-17 12:03:27,300 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 219 transitions. [2023-11-17 12:03:27,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 219 transitions. [2023-11-17 12:03:27,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:27,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 219 transitions. [2023-11-17 12:03:27,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 7.551724137931035) internal successors, (219), 29 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:27,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 20.0) internal successors, (600), 30 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:27,301 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 20.0) internal successors, (600), 30 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:27,301 INFO L175 Difference]: Start difference. First operand has 535 places, 1432 transitions, 38297 flow. Second operand 29 states and 219 transitions. [2023-11-17 12:03:27,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1592 transitions, 44716 flow [2023-11-17 12:03:29,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 1592 transitions, 44058 flow, removed 96 selfloop flow, removed 9 redundant places. [2023-11-17 12:03:29,903 INFO L231 Difference]: Finished difference. Result has 557 places, 1531 transitions, 41687 flow [2023-11-17 12:03:29,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=37677, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=482, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41687, PETRI_PLACES=557, PETRI_TRANSITIONS=1531} [2023-11-17 12:03:29,904 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 537 predicate places. [2023-11-17 12:03:29,905 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1531 transitions, 41687 flow [2023-11-17 12:03:29,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:29,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:29,905 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:29,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:30,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:30,107 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:30,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:30,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1056427042, now seen corresponding path program 59 times [2023-11-17 12:03:30,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:30,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435609510] [2023-11-17 12:03:30,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:30,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435609510] [2023-11-17 12:03:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435609510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560077111] [2023-11-17 12:03:30,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:03:30,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:30,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:30,208 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:30,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-17 12:03:30,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:03:30,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:30,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:30,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:30,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:30,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560077111] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:30,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:30,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-17 12:03:30,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694899511] [2023-11-17 12:03:30,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:30,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:03:30,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:30,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:03:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:03:30,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:30,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1531 transitions, 41687 flow. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:30,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:30,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:30,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:34,290 INFO L124 PetriNetUnfolderBase]: 3351/5566 cut-off events. [2023-11-17 12:03:34,290 INFO L125 PetriNetUnfolderBase]: For 260722/260722 co-relation queries the response was YES. [2023-11-17 12:03:34,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68488 conditions, 5566 events. 3351/5566 cut-off events. For 260722/260722 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35848 event pairs, 155 based on Foata normal form. 46/5612 useless extension candidates. Maximal degree in co-relation 68123. Up to 2178 conditions per place. [2023-11-17 12:03:34,433 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 820 selfloop transitions, 816 changer transitions 1/1637 dead transitions. [2023-11-17 12:03:34,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 581 places, 1637 transitions, 46791 flow [2023-11-17 12:03:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:03:34,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:03:34,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 196 transitions. [2023-11-17 12:03:34,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2023-11-17 12:03:34,434 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 196 transitions. [2023-11-17 12:03:34,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 196 transitions. [2023-11-17 12:03:34,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:34,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 196 transitions. [2023-11-17 12:03:34,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.538461538461538) internal successors, (196), 26 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:34,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 20.0) internal successors, (540), 27 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:34,435 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 20.0) internal successors, (540), 27 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:34,435 INFO L175 Difference]: Start difference. First operand has 557 places, 1531 transitions, 41687 flow. Second operand 26 states and 196 transitions. [2023-11-17 12:03:34,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 581 places, 1637 transitions, 46791 flow [2023-11-17 12:03:38,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 1637 transitions, 46333 flow, removed 185 selfloop flow, removed 6 redundant places. [2023-11-17 12:03:38,641 INFO L231 Difference]: Finished difference. Result has 578 places, 1592 transitions, 44663 flow [2023-11-17 12:03:38,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=40944, PETRI_DIFFERENCE_MINUEND_PLACES=550, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=750, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=760, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=44663, PETRI_PLACES=578, PETRI_TRANSITIONS=1592} [2023-11-17 12:03:38,643 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 558 predicate places. [2023-11-17 12:03:38,643 INFO L495 AbstractCegarLoop]: Abstraction has has 578 places, 1592 transitions, 44663 flow [2023-11-17 12:03:38,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:38,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:38,643 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:38,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:38,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:38,851 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:38,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1467569960, now seen corresponding path program 60 times [2023-11-17 12:03:38,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:38,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111500812] [2023-11-17 12:03:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:38,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:38,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:38,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111500812] [2023-11-17 12:03:38,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111500812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:38,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794261216] [2023-11-17 12:03:38,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:03:38,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:38,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:38,948 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:38,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-17 12:03:39,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:03:39,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:39,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:39,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:39,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:39,156 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:39,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:39,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794261216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:39,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:39,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-11-17 12:03:39,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629443406] [2023-11-17 12:03:39,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:39,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:03:39,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:39,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:03:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:03:39,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:39,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 578 places, 1592 transitions, 44663 flow. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:39,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:39,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:39,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:44,772 INFO L124 PetriNetUnfolderBase]: 3376/5675 cut-off events. [2023-11-17 12:03:44,773 INFO L125 PetriNetUnfolderBase]: For 268603/268603 co-relation queries the response was YES. [2023-11-17 12:03:44,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70869 conditions, 5675 events. 3376/5675 cut-off events. For 268603/268603 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 37384 event pairs, 198 based on Foata normal form. 54/5729 useless extension candidates. Maximal degree in co-relation 70499. Up to 1826 conditions per place. [2023-11-17 12:03:44,923 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 658 selfloop transitions, 981 changer transitions 0/1639 dead transitions. [2023-11-17 12:03:44,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 1639 transitions, 48194 flow [2023-11-17 12:03:44,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:03:44,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:03:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 190 transitions. [2023-11-17 12:03:44,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2023-11-17 12:03:44,924 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 190 transitions. [2023-11-17 12:03:44,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 190 transitions. [2023-11-17 12:03:44,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:44,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 190 transitions. [2023-11-17 12:03:44,925 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.6) internal successors, (190), 25 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:44,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:44,926 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:44,926 INFO L175 Difference]: Start difference. First operand has 578 places, 1592 transitions, 44663 flow. Second operand 25 states and 190 transitions. [2023-11-17 12:03:44,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 1639 transitions, 48194 flow [2023-11-17 12:03:49,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 1639 transitions, 47411 flow, removed 245 selfloop flow, removed 13 redundant places. [2023-11-17 12:03:49,309 INFO L231 Difference]: Finished difference. Result has 589 places, 1591 transitions, 45881 flow [2023-11-17 12:03:49,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=43035, PETRI_DIFFERENCE_MINUEND_PLACES=563, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=958, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=45881, PETRI_PLACES=589, PETRI_TRANSITIONS=1591} [2023-11-17 12:03:49,312 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 569 predicate places. [2023-11-17 12:03:49,312 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1591 transitions, 45881 flow [2023-11-17 12:03:49,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 15 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:49,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:49,312 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:49,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-11-17 12:03:49,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:49,518 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:49,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:49,519 INFO L85 PathProgramCache]: Analyzing trace with hash 956286404, now seen corresponding path program 61 times [2023-11-17 12:03:49,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:49,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043645764] [2023-11-17 12:03:49,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:49,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:49,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:49,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043645764] [2023-11-17 12:03:49,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043645764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:49,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618802349] [2023-11-17 12:03:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:03:49,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:49,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:49,634 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:49,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-11-17 12:03:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:49,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:49,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:49,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:49,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 12:03:49,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618802349] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:49,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:49,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2023-11-17 12:03:49,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885430249] [2023-11-17 12:03:49,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:49,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-17 12:03:49,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:49,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-17 12:03:49,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2023-11-17 12:03:49,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:49,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1591 transitions, 45881 flow. Second operand has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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 12:03:49,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:49,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:49,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:03:54,405 INFO L124 PetriNetUnfolderBase]: 3540/5911 cut-off events. [2023-11-17 12:03:54,405 INFO L125 PetriNetUnfolderBase]: For 298884/298884 co-relation queries the response was YES. [2023-11-17 12:03:54,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76741 conditions, 5911 events. 3540/5911 cut-off events. For 298884/298884 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 39033 event pairs, 411 based on Foata normal form. 12/5923 useless extension candidates. Maximal degree in co-relation 76371. Up to 2637 conditions per place. [2023-11-17 12:03:54,565 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 775 selfloop transitions, 936 changer transitions 10/1721 dead transitions. [2023-11-17 12:03:54,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 1721 transitions, 53183 flow [2023-11-17 12:03:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 12:03:54,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 12:03:54,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 162 transitions. [2023-11-17 12:03:54,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36818181818181817 [2023-11-17 12:03:54,566 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 162 transitions. [2023-11-17 12:03:54,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 162 transitions. [2023-11-17 12:03:54,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:03:54,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 162 transitions. [2023-11-17 12:03:54,567 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 7.363636363636363) internal successors, (162), 22 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:54,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 20.0) internal successors, (460), 23 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:54,567 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 20.0) internal successors, (460), 23 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:54,567 INFO L175 Difference]: Start difference. First operand has 589 places, 1591 transitions, 45881 flow. Second operand 22 states and 162 transitions. [2023-11-17 12:03:54,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 1721 transitions, 53183 flow [2023-11-17 12:03:58,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 1721 transitions, 51971 flow, removed 48 selfloop flow, removed 15 redundant places. [2023-11-17 12:03:58,102 INFO L231 Difference]: Finished difference. Result has 601 places, 1672 transitions, 50440 flow [2023-11-17 12:03:58,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=44691, PETRI_DIFFERENCE_MINUEND_PLACES=574, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=865, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=50440, PETRI_PLACES=601, PETRI_TRANSITIONS=1672} [2023-11-17 12:03:58,103 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 581 predicate places. [2023-11-17 12:03:58,103 INFO L495 AbstractCegarLoop]: Abstraction has has 601 places, 1672 transitions, 50440 flow [2023-11-17 12:03:58,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.666666666666667) internal successors, (84), 18 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 12:03:58,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:03:58,104 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:03:58,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2023-11-17 12:03:58,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-11-17 12:03:58,309 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:03:58,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:03:58,343 INFO L85 PathProgramCache]: Analyzing trace with hash -116798976, now seen corresponding path program 62 times [2023-11-17 12:03:58,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:03:58,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070168118] [2023-11-17 12:03:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:03:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:03:58,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:03:58,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:58,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:03:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070168118] [2023-11-17 12:03:58,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070168118] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:03:58,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65784469] [2023-11-17 12:03:58,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:03:58,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:03:58,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:03:58,429 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:03:58,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-11-17 12:03:58,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:03:58,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:03:58,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:03:58,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:03:58,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:58,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:03:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:03:58,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65784469] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:03:58,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:03:58,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:03:58,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787628250] [2023-11-17 12:03:58,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:03:58,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:03:58,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:03:58,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:03:58,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:03:58,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:03:58,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 601 places, 1672 transitions, 50440 flow. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:03:58,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:03:58,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:03:58,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:02,298 INFO L124 PetriNetUnfolderBase]: 3663/6088 cut-off events. [2023-11-17 12:04:02,298 INFO L125 PetriNetUnfolderBase]: For 337735/337735 co-relation queries the response was YES. [2023-11-17 12:04:02,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82400 conditions, 6088 events. 3663/6088 cut-off events. For 337735/337735 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 40141 event pairs, 409 based on Foata normal form. 6/6094 useless extension candidates. Maximal degree in co-relation 82163. Up to 2673 conditions per place. [2023-11-17 12:04:02,415 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 825 selfloop transitions, 954 changer transitions 10/1789 dead transitions. [2023-11-17 12:04:02,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 1789 transitions, 57668 flow [2023-11-17 12:04:02,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 12:04:02,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 12:04:02,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 164 transitions. [2023-11-17 12:04:02,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3565217391304348 [2023-11-17 12:04:02,416 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 164 transitions. [2023-11-17 12:04:02,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 164 transitions. [2023-11-17 12:04:02,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:02,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 164 transitions. [2023-11-17 12:04:02,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 7.130434782608695) internal successors, (164), 23 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:02,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:02,417 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 20.0) internal successors, (480), 24 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:02,417 INFO L175 Difference]: Start difference. First operand has 601 places, 1672 transitions, 50440 flow. Second operand 23 states and 164 transitions. [2023-11-17 12:04:02,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 1789 transitions, 57668 flow [2023-11-17 12:04:06,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 1789 transitions, 55114 flow, removed 967 selfloop flow, removed 11 redundant places. [2023-11-17 12:04:06,523 INFO L231 Difference]: Finished difference. Result has 617 places, 1740 transitions, 53688 flow [2023-11-17 12:04:06,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=48707, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=882, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=737, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=53688, PETRI_PLACES=617, PETRI_TRANSITIONS=1740} [2023-11-17 12:04:06,525 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 597 predicate places. [2023-11-17 12:04:06,525 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1740 transitions, 53688 flow [2023-11-17 12:04:06,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:06,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:06,525 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:06,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:06,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-11-17 12:04:06,731 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:04:06,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash 2117076254, now seen corresponding path program 63 times [2023-11-17 12:04:06,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:06,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546851375] [2023-11-17 12:04:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:06,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:06,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:06,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546851375] [2023-11-17 12:04:06,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546851375] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:06,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809649352] [2023-11-17 12:04:06,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:04:06,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:06,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:06,817 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:04:06,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-11-17 12:04:06,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:04:06,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:06,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:04:06,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:07,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:07,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:07,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:07,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809649352] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:07,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:07,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-11-17 12:04:07,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19236191] [2023-11-17 12:04:07,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:07,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:04:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:04:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:04:07,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:04:07,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1740 transitions, 53688 flow. Second operand has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 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 12:04:07,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:07,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:04:07,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:14,184 INFO L124 PetriNetUnfolderBase]: 4325/7154 cut-off events. [2023-11-17 12:04:14,184 INFO L125 PetriNetUnfolderBase]: For 376012/376012 co-relation queries the response was YES. [2023-11-17 12:04:14,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98148 conditions, 7154 events. 4325/7154 cut-off events. For 376012/376012 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 47882 event pairs, 209 based on Foata normal form. 22/7176 useless extension candidates. Maximal degree in co-relation 97763. Up to 2153 conditions per place. [2023-11-17 12:04:14,522 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 840 selfloop transitions, 1263 changer transitions 0/2103 dead transitions. [2023-11-17 12:04:14,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 2103 transitions, 69024 flow [2023-11-17 12:04:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:04:14,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:04:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 204 transitions. [2023-11-17 12:04:14,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2023-11-17 12:04:14,523 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 204 transitions. [2023-11-17 12:04:14,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 204 transitions. [2023-11-17 12:04:14,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:14,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 204 transitions. [2023-11-17 12:04:14,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.555555555555555) internal successors, (204), 27 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 12:04:14,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:14,525 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:14,525 INFO L175 Difference]: Start difference. First operand has 617 places, 1740 transitions, 53688 flow. Second operand 27 states and 204 transitions. [2023-11-17 12:04:14,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 2103 transitions, 69024 flow [2023-11-17 12:04:21,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 2103 transitions, 67681 flow, removed 152 selfloop flow, removed 16 redundant places. [2023-11-17 12:04:21,315 INFO L231 Difference]: Finished difference. Result has 631 places, 2059 transitions, 67148 flow [2023-11-17 12:04:21,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=52552, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=959, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=67148, PETRI_PLACES=631, PETRI_TRANSITIONS=2059} [2023-11-17 12:04:21,317 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 611 predicate places. [2023-11-17 12:04:21,317 INFO L495 AbstractCegarLoop]: Abstraction has has 631 places, 2059 transitions, 67148 flow [2023-11-17 12:04:21,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.9411764705882355) internal successors, (84), 17 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 12:04:21,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:21,318 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:21,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:21,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-11-17 12:04:21,524 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:04:21,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:21,524 INFO L85 PathProgramCache]: Analyzing trace with hash -913267014, now seen corresponding path program 64 times [2023-11-17 12:04:21,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:21,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673807155] [2023-11-17 12:04:21,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:21,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:21,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:21,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:21,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673807155] [2023-11-17 12:04:21,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673807155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:21,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767758396] [2023-11-17 12:04:21,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:04:21,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:21,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:21,630 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:04:21,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-11-17 12:04:21,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:04:21,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:21,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:04:21,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:21,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:21,849 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:21,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767758396] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:21,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:21,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-17 12:04:21,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582909141] [2023-11-17 12:04:21,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:21,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:04:21,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:04:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:04:21,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:04:21,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 631 places, 2059 transitions, 67148 flow. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:21,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:21,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:04:21,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:29,303 INFO L124 PetriNetUnfolderBase]: 4632/7595 cut-off events. [2023-11-17 12:04:29,304 INFO L125 PetriNetUnfolderBase]: For 451452/451452 co-relation queries the response was YES. [2023-11-17 12:04:29,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110379 conditions, 7595 events. 4632/7595 cut-off events. For 451452/451452 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 50828 event pairs, 266 based on Foata normal form. 24/7619 useless extension candidates. Maximal degree in co-relation 109989. Up to 2580 conditions per place. [2023-11-17 12:04:29,574 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 694 selfloop transitions, 1570 changer transitions 0/2264 dead transitions. [2023-11-17 12:04:29,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 655 places, 2264 transitions, 78734 flow [2023-11-17 12:04:29,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 12:04:29,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 12:04:29,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 198 transitions. [2023-11-17 12:04:29,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38076923076923075 [2023-11-17 12:04:29,581 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 198 transitions. [2023-11-17 12:04:29,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 198 transitions. [2023-11-17 12:04:29,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:29,581 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 198 transitions. [2023-11-17 12:04:29,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 7.615384615384615) internal successors, (198), 26 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:29,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 20.0) internal successors, (540), 27 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:29,582 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 20.0) internal successors, (540), 27 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:29,582 INFO L175 Difference]: Start difference. First operand has 631 places, 2059 transitions, 67148 flow. Second operand 26 states and 198 transitions. [2023-11-17 12:04:29,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 655 places, 2264 transitions, 78734 flow [2023-11-17 12:04:35,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 644 places, 2264 transitions, 77484 flow, removed 386 selfloop flow, removed 11 redundant places. [2023-11-17 12:04:35,389 INFO L231 Difference]: Finished difference. Result has 650 places, 2222 transitions, 77506 flow [2023-11-17 12:04:35,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=65945, PETRI_DIFFERENCE_MINUEND_PLACES=619, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=77506, PETRI_PLACES=650, PETRI_TRANSITIONS=2222} [2023-11-17 12:04:35,394 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 630 predicate places. [2023-11-17 12:04:35,394 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 2222 transitions, 77506 flow [2023-11-17 12:04:35,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:35,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:35,394 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:35,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:35,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2023-11-17 12:04:35,599 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:04:35,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:35,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1918589308, now seen corresponding path program 65 times [2023-11-17 12:04:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:35,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370564] [2023-11-17 12:04:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:35,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:35,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370564] [2023-11-17 12:04:35,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:35,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335654986] [2023-11-17 12:04:35,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:04:35,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:35,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:35,732 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:04:35,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-11-17 12:04:35,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:04:35,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:35,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:04:35,855 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:35,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:35,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:35,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335654986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:35,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:35,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:04:35,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885205351] [2023-11-17 12:04:35,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:35,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:04:35,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:35,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:04:35,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:04:35,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:04:35,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 2222 transitions, 77506 flow. Second operand has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:35,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:35,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:04:35,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:04:45,645 INFO L124 PetriNetUnfolderBase]: 5331/8820 cut-off events. [2023-11-17 12:04:45,646 INFO L125 PetriNetUnfolderBase]: For 560759/560759 co-relation queries the response was YES. [2023-11-17 12:04:45,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134709 conditions, 8820 events. 5331/8820 cut-off events. For 560759/560759 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 61308 event pairs, 307 based on Foata normal form. 30/8850 useless extension candidates. Maximal degree in co-relation 134311. Up to 3395 conditions per place. [2023-11-17 12:04:46,005 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 1382 selfloop transitions, 1211 changer transitions 0/2593 dead transitions. [2023-11-17 12:04:46,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 685 places, 2593 transitions, 95055 flow [2023-11-17 12:04:46,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-17 12:04:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-17 12:04:46,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 266 transitions. [2023-11-17 12:04:46,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36944444444444446 [2023-11-17 12:04:46,007 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 266 transitions. [2023-11-17 12:04:46,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 266 transitions. [2023-11-17 12:04:46,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:04:46,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 266 transitions. [2023-11-17 12:04:46,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 7.388888888888889) internal successors, (266), 36 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 12:04:46,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 20.0) internal successors, (740), 37 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:46,009 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 20.0) internal successors, (740), 37 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:46,009 INFO L175 Difference]: Start difference. First operand has 650 places, 2222 transitions, 77506 flow. Second operand 36 states and 266 transitions. [2023-11-17 12:04:46,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 685 places, 2593 transitions, 95055 flow [2023-11-17 12:04:59,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 672 places, 2593 transitions, 93643 flow, removed 631 selfloop flow, removed 13 redundant places. [2023-11-17 12:04:59,184 INFO L231 Difference]: Finished difference. Result has 683 places, 2530 transitions, 91869 flow [2023-11-17 12:04:59,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=75927, PETRI_DIFFERENCE_MINUEND_PLACES=637, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=916, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=91869, PETRI_PLACES=683, PETRI_TRANSITIONS=2530} [2023-11-17 12:04:59,187 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 663 predicate places. [2023-11-17 12:04:59,187 INFO L495 AbstractCegarLoop]: Abstraction has has 683 places, 2530 transitions, 91869 flow [2023-11-17 12:04:59,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.8) internal successors, (96), 20 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:59,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:04:59,187 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:04:59,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-11-17 12:04:59,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:59,394 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:04:59,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:04:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2057683392, now seen corresponding path program 66 times [2023-11-17 12:04:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:04:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100124959] [2023-11-17 12:04:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:04:59,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:04:59,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:04:59,487 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:59,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:04:59,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100124959] [2023-11-17 12:04:59,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100124959] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:04:59,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479826131] [2023-11-17 12:04:59,488 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:04:59,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:04:59,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:04:59,491 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:04:59,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-11-17 12:04:59,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:04:59,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:04:59,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:04:59,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:04:59,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:59,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:04:59,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:04:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479826131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:04:59,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:04:59,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-17 12:04:59,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716482550] [2023-11-17 12:04:59,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:04:59,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 12:04:59,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:04:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 12:04:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-17 12:04:59,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:04:59,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 683 places, 2530 transitions, 91869 flow. Second operand has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:04:59,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:04:59,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:04:59,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:13,440 INFO L124 PetriNetUnfolderBase]: 5608/9231 cut-off events. [2023-11-17 12:05:13,441 INFO L125 PetriNetUnfolderBase]: For 629324/629324 co-relation queries the response was YES. [2023-11-17 12:05:13,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145079 conditions, 9231 events. 5608/9231 cut-off events. For 629324/629324 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 63836 event pairs, 1385 based on Foata normal form. 18/9249 useless extension candidates. Maximal degree in co-relation 144633. Up to 8451 conditions per place. [2023-11-17 12:05:13,960 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2380 selfloop transitions, 321 changer transitions 18/2719 dead transitions. [2023-11-17 12:05:13,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 707 places, 2719 transitions, 103300 flow [2023-11-17 12:05:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 12:05:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 12:05:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 178 transitions. [2023-11-17 12:05:13,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.356 [2023-11-17 12:05:13,962 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 178 transitions. [2023-11-17 12:05:13,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 178 transitions. [2023-11-17 12:05:13,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:13,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 178 transitions. [2023-11-17 12:05:13,963 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 7.12) internal successors, (178), 25 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:13,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:13,963 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 20.0) internal successors, (520), 26 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:13,963 INFO L175 Difference]: Start difference. First operand has 683 places, 2530 transitions, 91869 flow. Second operand 25 states and 178 transitions. [2023-11-17 12:05:13,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 707 places, 2719 transitions, 103300 flow [2023-11-17 12:05:30,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 694 places, 2719 transitions, 102508 flow, removed 324 selfloop flow, removed 13 redundant places. [2023-11-17 12:05:30,327 INFO L231 Difference]: Finished difference. Result has 704 places, 2662 transitions, 97339 flow [2023-11-17 12:05:30,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=91077, PETRI_DIFFERENCE_MINUEND_PLACES=670, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=97339, PETRI_PLACES=704, PETRI_TRANSITIONS=2662} [2023-11-17 12:05:30,330 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 684 predicate places. [2023-11-17 12:05:30,331 INFO L495 AbstractCegarLoop]: Abstraction has has 704 places, 2662 transitions, 97339 flow [2023-11-17 12:05:30,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.6) internal successors, (92), 20 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:30,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:30,331 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:30,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:30,538 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:05:30,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 349683638, now seen corresponding path program 67 times [2023-11-17 12:05:30,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:30,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175431008] [2023-11-17 12:05:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:30,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:30,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175431008] [2023-11-17 12:05:30,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175431008] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:30,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850421353] [2023-11-17 12:05:30,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:05:30,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:30,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:30,647 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:05:30,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-11-17 12:05:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:30,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:05:30,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:30,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:30,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:30,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850421353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:30,916 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:30,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 16 [2023-11-17 12:05:30,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133553846] [2023-11-17 12:05:30,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:30,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:05:30,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:05:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:05:30,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:05:30,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 704 places, 2662 transitions, 97339 flow. Second operand has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:30,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:30,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:05:30,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:05:42,568 INFO L124 PetriNetUnfolderBase]: 5845/9544 cut-off events. [2023-11-17 12:05:42,568 INFO L125 PetriNetUnfolderBase]: For 719618/719618 co-relation queries the response was YES. [2023-11-17 12:05:42,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151034 conditions, 9544 events. 5845/9544 cut-off events. For 719618/719618 co-relation queries the response was YES. Maximal size of possible extension queue 720. Compared 65505 event pairs, 1156 based on Foata normal form. 42/9586 useless extension candidates. Maximal degree in co-relation 150759. Up to 8046 conditions per place. [2023-11-17 12:05:42,800 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2249 selfloop transitions, 589 changer transitions 0/2838 dead transitions. [2023-11-17 12:05:42,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 728 places, 2838 transitions, 108450 flow [2023-11-17 12:05:42,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:05:42,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:05:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 206 transitions. [2023-11-17 12:05:42,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814814814814815 [2023-11-17 12:05:42,801 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 206 transitions. [2023-11-17 12:05:42,801 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 206 transitions. [2023-11-17 12:05:42,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:05:42,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 206 transitions. [2023-11-17 12:05:42,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.62962962962963) internal successors, (206), 27 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:42,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:42,802 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:42,802 INFO L175 Difference]: Start difference. First operand has 704 places, 2662 transitions, 97339 flow. Second operand 27 states and 206 transitions. [2023-11-17 12:05:42,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 728 places, 2838 transitions, 108450 flow [2023-11-17 12:05:54,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 712 places, 2838 transitions, 106368 flow, removed 974 selfloop flow, removed 16 redundant places. [2023-11-17 12:05:54,959 INFO L231 Difference]: Finished difference. Result has 717 places, 2788 transitions, 101970 flow [2023-11-17 12:05:54,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=95131, PETRI_DIFFERENCE_MINUEND_PLACES=686, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=462, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=101970, PETRI_PLACES=717, PETRI_TRANSITIONS=2788} [2023-11-17 12:05:54,961 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 697 predicate places. [2023-11-17 12:05:54,961 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 2788 transitions, 101970 flow [2023-11-17 12:05:54,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.875) internal successors, (78), 16 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:54,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:05:54,961 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:05:54,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2023-11-17 12:05:55,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:55,166 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:05:55,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:05:55,167 INFO L85 PathProgramCache]: Analyzing trace with hash -116039152, now seen corresponding path program 68 times [2023-11-17 12:05:55,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:05:55,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441088590] [2023-11-17 12:05:55,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:05:55,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:05:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:05:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:55,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:05:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441088590] [2023-11-17 12:05:55,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441088590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:05:55,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45594357] [2023-11-17 12:05:55,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:05:55,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:05:55,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:05:55,230 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:05:55,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-11-17 12:05:55,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:05:55,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:05:55,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:05:55,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:05:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:55,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:05:55,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:05:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45594357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:05:55,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:05:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2023-11-17 12:05:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622805302] [2023-11-17 12:05:55,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:05:55,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:05:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:05:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:05:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:05:55,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:05:55,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 2788 transitions, 101970 flow. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:05:55,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:05:55,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:05:55,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:04,606 INFO L124 PetriNetUnfolderBase]: 5923/9646 cut-off events. [2023-11-17 12:06:04,607 INFO L125 PetriNetUnfolderBase]: For 742351/742351 co-relation queries the response was YES. [2023-11-17 12:06:04,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155363 conditions, 9646 events. 5923/9646 cut-off events. For 742351/742351 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 66157 event pairs, 1218 based on Foata normal form. 26/9672 useless extension candidates. Maximal degree in co-relation 154975. Up to 8394 conditions per place. [2023-11-17 12:06:05,182 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2386 selfloop transitions, 458 changer transitions 10/2854 dead transitions. [2023-11-17 12:06:05,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 732 places, 2854 transitions, 110983 flow [2023-11-17 12:06:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:06:05,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:06:05,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 129 transitions. [2023-11-17 12:06:05,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37941176470588234 [2023-11-17 12:06:05,184 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 129 transitions. [2023-11-17 12:06:05,184 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 129 transitions. [2023-11-17 12:06:05,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:05,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 129 transitions. [2023-11-17 12:06:05,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.588235294117647) internal successors, (129), 17 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:05,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:05,185 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:05,185 INFO L175 Difference]: Start difference. First operand has 717 places, 2788 transitions, 101970 flow. Second operand 17 states and 129 transitions. [2023-11-17 12:06:05,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 732 places, 2854 transitions, 110983 flow [2023-11-17 12:06:23,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 720 places, 2854 transitions, 108018 flow, removed 1403 selfloop flow, removed 12 redundant places. [2023-11-17 12:06:23,447 INFO L231 Difference]: Finished difference. Result has 724 places, 2817 transitions, 102924 flow [2023-11-17 12:06:23,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=99803, PETRI_DIFFERENCE_MINUEND_PLACES=704, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=411, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=102924, PETRI_PLACES=724, PETRI_TRANSITIONS=2817} [2023-11-17 12:06:23,450 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 704 predicate places. [2023-11-17 12:06:23,463 INFO L495 AbstractCegarLoop]: Abstraction has has 724 places, 2817 transitions, 102924 flow [2023-11-17 12:06:23,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:23,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:23,463 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:23,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:23,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2023-11-17 12:06:23,664 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:06:23,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:23,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1777324777, now seen corresponding path program 69 times [2023-11-17 12:06:23,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:23,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515366164] [2023-11-17 12:06:23,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:23,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:23,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:23,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515366164] [2023-11-17 12:06:23,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515366164] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651421903] [2023-11-17 12:06:23,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:06:23,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:23,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:23,763 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:06:23,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-11-17 12:06:23,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:06:23,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:23,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:06:23,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:23,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:24,030 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:24,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651421903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:24,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:24,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-11-17 12:06:24,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221335336] [2023-11-17 12:06:24,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:24,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:06:24,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:24,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:06:24,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:06:24,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:06:24,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 724 places, 2817 transitions, 102924 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 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 12:06:24,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:24,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:06:24,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:06:41,423 INFO L124 PetriNetUnfolderBase]: 6217/10090 cut-off events. [2023-11-17 12:06:41,423 INFO L125 PetriNetUnfolderBase]: For 773915/773915 co-relation queries the response was YES. [2023-11-17 12:06:41,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160206 conditions, 10090 events. 6217/10090 cut-off events. For 773915/773915 co-relation queries the response was YES. Maximal size of possible extension queue 773. Compared 69579 event pairs, 265 based on Foata normal form. 88/10178 useless extension candidates. Maximal degree in co-relation 159897. Up to 7496 conditions per place. [2023-11-17 12:06:41,834 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2178 selfloop transitions, 860 changer transitions 0/3038 dead transitions. [2023-11-17 12:06:41,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 745 places, 3038 transitions, 114907 flow [2023-11-17 12:06:41,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-17 12:06:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-17 12:06:41,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 199 transitions. [2023-11-17 12:06:41,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3685185185185185 [2023-11-17 12:06:41,836 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 199 transitions. [2023-11-17 12:06:41,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 199 transitions. [2023-11-17 12:06:41,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:06:41,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 199 transitions. [2023-11-17 12:06:41,837 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 7.37037037037037) internal successors, (199), 27 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:41,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:41,838 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 20.0) internal successors, (560), 28 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:06:41,838 INFO L175 Difference]: Start difference. First operand has 724 places, 2817 transitions, 102924 flow. Second operand 27 states and 199 transitions. [2023-11-17 12:06:41,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 745 places, 3038 transitions, 114907 flow [2023-11-17 12:06:59,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 732 places, 3038 transitions, 114252 flow, removed 146 selfloop flow, removed 13 redundant places. [2023-11-17 12:06:59,280 INFO L231 Difference]: Finished difference. Result has 742 places, 3002 transitions, 110489 flow [2023-11-17 12:06:59,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=101251, PETRI_DIFFERENCE_MINUEND_PLACES=706, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2798, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=663, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2083, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=110489, PETRI_PLACES=742, PETRI_TRANSITIONS=3002} [2023-11-17 12:06:59,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 722 predicate places. [2023-11-17 12:06:59,283 INFO L495 AbstractCegarLoop]: Abstraction has has 742 places, 3002 transitions, 110489 flow [2023-11-17 12:06:59,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 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 12:06:59,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:06:59,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:06:59,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-11-17 12:06:59,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:59,491 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:06:59,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:06:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1616676476, now seen corresponding path program 70 times [2023-11-17 12:06:59,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:06:59,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011867694] [2023-11-17 12:06:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:06:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:06:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:06:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:59,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:06:59,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011867694] [2023-11-17 12:06:59,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011867694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:06:59,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273242382] [2023-11-17 12:06:59,579 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 12:06:59,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:06:59,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:06:59,594 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:06:59,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-11-17 12:06:59,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 12:06:59,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:06:59,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:06:59,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:06:59,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:59,829 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:06:59,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:06:59,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273242382] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:06:59,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:06:59,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 17 [2023-11-17 12:06:59,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047848292] [2023-11-17 12:06:59,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:06:59,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 12:06:59,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:06:59,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 12:06:59,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-11-17 12:06:59,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:06:59,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 742 places, 3002 transitions, 110489 flow. Second operand has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 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 12:06:59,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:06:59,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:06:59,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:15,075 INFO L124 PetriNetUnfolderBase]: 6217/10094 cut-off events. [2023-11-17 12:07:15,075 INFO L125 PetriNetUnfolderBase]: For 755059/755059 co-relation queries the response was YES. [2023-11-17 12:07:15,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163236 conditions, 10094 events. 6217/10094 cut-off events. For 755059/755059 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 69400 event pairs, 1538 based on Foata normal form. 6/10100 useless extension candidates. Maximal degree in co-relation 162754. Up to 9428 conditions per place. [2023-11-17 12:07:15,362 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2725 selfloop transitions, 300 changer transitions 8/3033 dead transitions. [2023-11-17 12:07:15,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 3033 transitions, 117305 flow [2023-11-17 12:07:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 12:07:15,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 12:07:15,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 126 transitions. [2023-11-17 12:07:15,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37058823529411766 [2023-11-17 12:07:15,364 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 126 transitions. [2023-11-17 12:07:15,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 126 transitions. [2023-11-17 12:07:15,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:15,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 126 transitions. [2023-11-17 12:07:15,364 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 7.411764705882353) internal successors, (126), 17 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:15,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:15,365 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 20.0) internal successors, (360), 18 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:15,365 INFO L175 Difference]: Start difference. First operand has 742 places, 3002 transitions, 110489 flow. Second operand 17 states and 126 transitions. [2023-11-17 12:07:15,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 3033 transitions, 117305 flow [2023-11-17 12:07:29,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 747 places, 3033 transitions, 114935 flow, removed 1074 selfloop flow, removed 10 redundant places. [2023-11-17 12:07:29,614 INFO L231 Difference]: Finished difference. Result has 749 places, 2997 transitions, 108877 flow [2023-11-17 12:07:29,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108215, PETRI_DIFFERENCE_MINUEND_PLACES=731, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2999, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2699, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=108877, PETRI_PLACES=749, PETRI_TRANSITIONS=2997} [2023-11-17 12:07:29,616 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 729 predicate places. [2023-11-17 12:07:29,617 INFO L495 AbstractCegarLoop]: Abstraction has has 749 places, 2997 transitions, 108877 flow [2023-11-17 12:07:29,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.764705882352941) internal successors, (81), 17 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 12:07:29,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:07:29,617 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:07:29,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-11-17 12:07:29,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:29,822 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:07:29,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:07:29,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2549490, now seen corresponding path program 71 times [2023-11-17 12:07:29,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:07:29,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339922816] [2023-11-17 12:07:29,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:07:29,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:07:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:07:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:29,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:07:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339922816] [2023-11-17 12:07:29,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339922816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:07:29,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756596544] [2023-11-17 12:07:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 12:07:29,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:07:29,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:07:29,888 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:07:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-11-17 12:07:30,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 12:07:30,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:07:30,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:07:30,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:07:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:30,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:07:30,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:07:30,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [756596544] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:07:30,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:07:30,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:07:30,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840802621] [2023-11-17 12:07:30,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:07:30,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:07:30,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:07:30,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:07:30,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:07:30,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:07:30,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 749 places, 2997 transitions, 108877 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:30,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:07:30,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:07:30,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:07:44,912 INFO L124 PetriNetUnfolderBase]: 6229/10124 cut-off events. [2023-11-17 12:07:44,912 INFO L125 PetriNetUnfolderBase]: For 734386/734386 co-relation queries the response was YES. [2023-11-17 12:07:45,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161268 conditions, 10124 events. 6229/10124 cut-off events. For 734386/734386 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 69747 event pairs, 903 based on Foata normal form. 2/10126 useless extension candidates. Maximal degree in co-relation 160785. Up to 7185 conditions per place. [2023-11-17 12:07:45,290 INFO L140 encePairwiseOnDemand]: 15/20 looper letters, 2416 selfloop transitions, 628 changer transitions 7/3051 dead transitions. [2023-11-17 12:07:45,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 752 places, 3051 transitions, 116295 flow [2023-11-17 12:07:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-17 12:07:45,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-17 12:07:45,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 78 transitions. [2023-11-17 12:07:45,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2023-11-17 12:07:45,292 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 78 transitions. [2023-11-17 12:07:45,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 78 transitions. [2023-11-17 12:07:45,292 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:07:45,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 78 transitions. [2023-11-17 12:07:45,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:45,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:45,292 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:07:45,293 INFO L175 Difference]: Start difference. First operand has 749 places, 2997 transitions, 108877 flow. Second operand 9 states and 78 transitions. [2023-11-17 12:07:45,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 752 places, 3051 transitions, 116295 flow [2023-11-17 12:08:01,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 3051 transitions, 115997 flow, removed 52 selfloop flow, removed 6 redundant places. [2023-11-17 12:08:01,077 INFO L231 Difference]: Finished difference. Result has 751 places, 3009 transitions, 110843 flow [2023-11-17 12:08:01,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=108581, PETRI_DIFFERENCE_MINUEND_PLACES=738, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2997, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=616, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=110843, PETRI_PLACES=751, PETRI_TRANSITIONS=3009} [2023-11-17 12:08:01,079 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 731 predicate places. [2023-11-17 12:08:01,079 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 3009 transitions, 110843 flow [2023-11-17 12:08:01,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:01,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:01,080 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:01,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-11-17 12:08:01,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2023-11-17 12:08:01,282 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:08:01,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:01,282 INFO L85 PathProgramCache]: Analyzing trace with hash -2146247046, now seen corresponding path program 72 times [2023-11-17 12:08:01,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:01,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209027536] [2023-11-17 12:08:01,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:01,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:01,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209027536] [2023-11-17 12:08:01,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209027536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:01,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106008385] [2023-11-17 12:08:01,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 12:08:01,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:01,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:01,358 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:08:01,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-11-17 12:08:01,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 12:08:01,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:08:01,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:08:01,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:01,550 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:01,586 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:01,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106008385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:01,587 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:01,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-17 12:08:01,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854920890] [2023-11-17 12:08:01,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:01,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-17 12:08:01,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:01,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-17 12:08:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-11-17 12:08:01,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:08:01,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 3009 transitions, 110843 flow. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:01,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:01,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:08:01,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:14,942 INFO L124 PetriNetUnfolderBase]: 6225/10116 cut-off events. [2023-11-17 12:08:14,942 INFO L125 PetriNetUnfolderBase]: For 767306/767306 co-relation queries the response was YES. [2023-11-17 12:08:15,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164261 conditions, 10116 events. 6225/10116 cut-off events. For 767306/767306 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 69958 event pairs, 905 based on Foata normal form. 6/10122 useless extension candidates. Maximal degree in co-relation 163991. Up to 7207 conditions per place. [2023-11-17 12:08:15,348 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2357 selfloop transitions, 689 changer transitions 7/3053 dead transitions. [2023-11-17 12:08:15,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 762 places, 3053 transitions, 118254 flow [2023-11-17 12:08:15,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 12:08:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 12:08:15,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 116 transitions. [2023-11-17 12:08:15,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2023-11-17 12:08:15,349 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 116 transitions. [2023-11-17 12:08:15,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 116 transitions. [2023-11-17 12:08:15,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:15,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 116 transitions. [2023-11-17 12:08:15,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 7.733333333333333) internal successors, (116), 15 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:15,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:15,350 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 20.0) internal successors, (320), 16 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:15,350 INFO L175 Difference]: Start difference. First operand has 751 places, 3009 transitions, 110843 flow. Second operand 15 states and 116 transitions. [2023-11-17 12:08:15,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 762 places, 3053 transitions, 118254 flow [2023-11-17 12:08:33,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 755 places, 3053 transitions, 117316 flow, removed 96 selfloop flow, removed 7 redundant places. [2023-11-17 12:08:33,103 INFO L231 Difference]: Finished difference. Result has 757 places, 3010 transitions, 112304 flow [2023-11-17 12:08:33,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=109889, PETRI_DIFFERENCE_MINUEND_PLACES=741, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3008, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=683, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=112304, PETRI_PLACES=757, PETRI_TRANSITIONS=3010} [2023-11-17 12:08:33,105 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 737 predicate places. [2023-11-17 12:08:33,105 INFO L495 AbstractCegarLoop]: Abstraction has has 757 places, 3010 transitions, 112304 flow [2023-11-17 12:08:33,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:33,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:08:33,105 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:08:33,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2023-11-17 12:08:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:33,311 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:08:33,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:08:33,317 INFO L85 PathProgramCache]: Analyzing trace with hash -136220871, now seen corresponding path program 73 times [2023-11-17 12:08:33,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:08:33,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848007178] [2023-11-17 12:08:33,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:08:33,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:08:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:33,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:33,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:08:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848007178] [2023-11-17 12:08:33,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848007178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:08:33,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207326827] [2023-11-17 12:08:33,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 12:08:33,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:08:33,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:08:33,425 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:08:33,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-11-17 12:08:33,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:08:33,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:08:33,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:08:33,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:33,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:08:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:08:33,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207326827] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:08:33,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:08:33,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-17 12:08:33,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459573040] [2023-11-17 12:08:33,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:08:33,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 12:08:33,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:08:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 12:08:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-17 12:08:33,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:08:33,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 3010 transitions, 112304 flow. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:33,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:08:33,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:08:33,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:08:47,341 INFO L124 PetriNetUnfolderBase]: 6457/10488 cut-off events. [2023-11-17 12:08:47,341 INFO L125 PetriNetUnfolderBase]: For 775188/775188 co-relation queries the response was YES. [2023-11-17 12:08:47,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169892 conditions, 10488 events. 6457/10488 cut-off events. For 775188/775188 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 73084 event pairs, 37 based on Foata normal form. 16/10504 useless extension candidates. Maximal degree in co-relation 169623. Up to 5842 conditions per place. [2023-11-17 12:08:47,909 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2111 selfloop transitions, 1086 changer transitions 0/3197 dead transitions. [2023-11-17 12:08:47,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 3197 transitions, 122958 flow [2023-11-17 12:08:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 12:08:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 12:08:47,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 110 transitions. [2023-11-17 12:08:47,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4230769230769231 [2023-11-17 12:08:47,911 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 110 transitions. [2023-11-17 12:08:47,911 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 110 transitions. [2023-11-17 12:08:47,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:08:47,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 110 transitions. [2023-11-17 12:08:47,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 8.461538461538462) internal successors, (110), 13 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:47,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:47,912 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:08:47,912 INFO L175 Difference]: Start difference. First operand has 757 places, 3010 transitions, 112304 flow. Second operand 13 states and 110 transitions. [2023-11-17 12:08:47,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 3197 transitions, 122958 flow [2023-11-17 12:09:04,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 757 places, 3197 transitions, 121749 flow, removed 183 selfloop flow, removed 11 redundant places. [2023-11-17 12:09:04,766 INFO L231 Difference]: Finished difference. Result has 763 places, 3126 transitions, 116477 flow [2023-11-17 12:09:04,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=111095, PETRI_DIFFERENCE_MINUEND_PLACES=745, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=970, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1965, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=116477, PETRI_PLACES=763, PETRI_TRANSITIONS=3126} [2023-11-17 12:09:04,769 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 743 predicate places. [2023-11-17 12:09:04,769 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 3126 transitions, 116477 flow [2023-11-17 12:09:04,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:04,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:09:04,769 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:09:04,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-11-17 12:09:04,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:09:04,975 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:09:04,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:09:04,975 INFO L85 PathProgramCache]: Analyzing trace with hash -184838351, now seen corresponding path program 74 times [2023-11-17 12:09:04,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:09:04,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032974406] [2023-11-17 12:09:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:09:04,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:09:05,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:09:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:05,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:09:05,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032974406] [2023-11-17 12:09:05,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032974406] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:09:05,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353068885] [2023-11-17 12:09:05,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 12:09:05,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:09:05,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:09:05,079 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:09:05,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-11-17 12:09:05,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 12:09:05,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:09:05,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:09:05,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:09:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:05,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:09:05,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:05,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353068885] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:09:05,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:09:05,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:09:05,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588024072] [2023-11-17 12:09:05,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:09:05,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:09:05,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:09:05,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:09:05,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:09:05,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:09:05,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 3126 transitions, 116477 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:05,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:09:05,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:09:05,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:09:21,857 INFO L124 PetriNetUnfolderBase]: 6736/10929 cut-off events. [2023-11-17 12:09:21,857 INFO L125 PetriNetUnfolderBase]: For 823434/823434 co-relation queries the response was YES. [2023-11-17 12:09:22,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178515 conditions, 10929 events. 6736/10929 cut-off events. For 823434/823434 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 76480 event pairs, 197 based on Foata normal form. 40/10969 useless extension candidates. Maximal degree in co-relation 178243. Up to 7339 conditions per place. [2023-11-17 12:09:22,500 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2299 selfloop transitions, 1061 changer transitions 0/3360 dead transitions. [2023-11-17 12:09:22,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 786 places, 3360 transitions, 129682 flow [2023-11-17 12:09:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 12:09:22,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 12:09:22,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 185 transitions. [2023-11-17 12:09:22,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854166666666667 [2023-11-17 12:09:22,501 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 185 transitions. [2023-11-17 12:09:22,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 185 transitions. [2023-11-17 12:09:22,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:09:22,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 185 transitions. [2023-11-17 12:09:22,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 7.708333333333333) internal successors, (185), 24 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:22,502 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:22,503 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 20.0) internal successors, (500), 25 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:22,503 INFO L175 Difference]: Start difference. First operand has 763 places, 3126 transitions, 116477 flow. Second operand 24 states and 185 transitions. [2023-11-17 12:09:22,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 786 places, 3360 transitions, 129682 flow [2023-11-17 12:09:41,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 3360 transitions, 128112 flow, removed 106 selfloop flow, removed 5 redundant places. [2023-11-17 12:09:42,089 INFO L231 Difference]: Finished difference. Result has 789 places, 3305 transitions, 123861 flow [2023-11-17 12:09:42,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=20, PETRI_DIFFERENCE_MINUEND_FLOW=114503, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=123861, PETRI_PLACES=789, PETRI_TRANSITIONS=3305} [2023-11-17 12:09:42,092 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 769 predicate places. [2023-11-17 12:09:42,092 INFO L495 AbstractCegarLoop]: Abstraction has has 789 places, 3305 transitions, 123861 flow [2023-11-17 12:09:42,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:42,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 12:09:42,092 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 12:09:42,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2023-11-17 12:09:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:09:42,299 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 12:09:42,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 12:09:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 669816215, now seen corresponding path program 75 times [2023-11-17 12:09:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 12:09:42,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072465148] [2023-11-17 12:09:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 12:09:42,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 12:09:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 12:09:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 12:09:42,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072465148] [2023-11-17 12:09:42,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072465148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 12:09:42,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331401940] [2023-11-17 12:09:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 12:09:42,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 12:09:42,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 12:09:42,398 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 12:09:42,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-11-17 12:09:42,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 12:09:42,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 12:09:42,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 12:09:42,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 12:09:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:42,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 12:09:42,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 12:09:42,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331401940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 12:09:42,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 12:09:42,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-17 12:09:42,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502429442] [2023-11-17 12:09:42,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 12:09:42,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-17 12:09:42,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 12:09:42,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-17 12:09:42,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-17 12:09:42,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 20 [2023-11-17 12:09:42,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 789 places, 3305 transitions, 123861 flow. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:09:42,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 12:09:42,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 20 [2023-11-17 12:09:42,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 12:10:05,369 INFO L124 PetriNetUnfolderBase]: 6736/10945 cut-off events. [2023-11-17 12:10:05,369 INFO L125 PetriNetUnfolderBase]: For 834719/834719 co-relation queries the response was YES. [2023-11-17 12:10:06,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180976 conditions, 10945 events. 6736/10945 cut-off events. For 834719/834719 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 77236 event pairs, 310 based on Foata normal form. 20/10965 useless extension candidates. Maximal degree in co-relation 180697. Up to 7260 conditions per place. [2023-11-17 12:10:06,439 INFO L140 encePairwiseOnDemand]: 14/20 looper letters, 2411 selfloop transitions, 940 changer transitions 8/3359 dead transitions. [2023-11-17 12:10:06,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 807 places, 3359 transitions, 131440 flow [2023-11-17 12:10:06,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 12:10:06,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 12:10:06,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 149 transitions. [2023-11-17 12:10:06,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39210526315789473 [2023-11-17 12:10:06,441 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 149 transitions. [2023-11-17 12:10:06,441 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 149 transitions. [2023-11-17 12:10:06,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 12:10:06,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 149 transitions. [2023-11-17 12:10:06,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 7.842105263157895) internal successors, (149), 19 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:06,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:06,442 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 12:10:06,442 INFO L175 Difference]: Start difference. First operand has 789 places, 3305 transitions, 123861 flow. Second operand 19 states and 149 transitions. [2023-11-17 12:10:06,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 807 places, 3359 transitions, 131440 flow Received shutdown request... [2023-11-17 12:10:14,861 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 12:10:14,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-11-17 12:10:14,871 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 12:10:14,871 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 12:10:15,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-11-17 12:10:15,067 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-11-17 12:10:15,069 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 12:10:15,070 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 12:10:15,070 INFO L445 BasicCegarLoop]: Path program histogram: [75, 6, 6, 2] [2023-11-17 12:10:15,085 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 12:10:15,086 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 12:10:15,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 12:10:15 BasicIcfg [2023-11-17 12:10:15,103 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 12:10:15,103 INFO L158 Benchmark]: Toolchain (without parser) took 545184.31ms. Allocated memory was 242.2MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 195.7MB in the beginning and 3.4GB in the end (delta: -3.2GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2023-11-17 12:10:15,103 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 188.7MB. Free memory is still 137.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 12:10:15,104 INFO L158 Benchmark]: CACSL2BoogieTranslator took 265.97ms. Allocated memory is still 242.2MB. Free memory was 195.7MB in the beginning and 184.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 12:10:15,104 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.53ms. Allocated memory is still 242.2MB. Free memory was 184.2MB in the beginning and 182.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:10:15,104 INFO L158 Benchmark]: Boogie Preprocessor took 31.53ms. Allocated memory is still 242.2MB. Free memory was 182.1MB in the beginning and 180.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 12:10:15,104 INFO L158 Benchmark]: RCFGBuilder took 975.85ms. Allocated memory is still 242.2MB. Free memory was 180.5MB in the beginning and 182.2MB in the end (delta: -1.7MB). Peak memory consumption was 43.9MB. Max. memory is 8.0GB. [2023-11-17 12:10:15,105 INFO L158 Benchmark]: TraceAbstraction took 543861.13ms. Allocated memory was 242.2MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 181.2MB in the beginning and 3.4GB in the end (delta: -3.3GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. [2023-11-17 12:10:15,106 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 188.7MB. Free memory is still 137.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 265.97ms. Allocated memory is still 242.2MB. Free memory was 195.7MB in the beginning and 184.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.53ms. Allocated memory is still 242.2MB. Free memory was 184.2MB in the beginning and 182.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.53ms. Allocated memory is still 242.2MB. Free memory was 182.1MB in the beginning and 180.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 975.85ms. Allocated memory is still 242.2MB. Free memory was 180.5MB in the beginning and 182.2MB in the end (delta: -1.7MB). Peak memory consumption was 43.9MB. Max. memory is 8.0GB. * TraceAbstraction took 543861.13ms. Allocated memory was 242.2MB in the beginning and 4.8GB in the end (delta: 4.6GB). Free memory was 181.2MB in the beginning and 3.4GB in the end (delta: -3.3GB). Peak memory consumption was 2.0GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 0.1s, 21 PlacesBefore, 20 PlacesAfterwards, 16 TransitionsBefore, 15 TransitionsAfterwards, 54 CoEnabledTransitionPairs, 1 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 48 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 48, independent: 48, independent conditional: 0, independent unconditional: 48, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 24, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 24, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, independent: 0, independent conditional: 0, independent unconditional: 0, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 48, independent: 24, independent conditional: 0, independent unconditional: 24, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 24, unknown conditional: 0, unknown unconditional: 24] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 84]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 79]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 26 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 543.7s, OverallIterations: 89, TraceHistogramMax: 3, PathProgramHistogramMax: 75, EmptinessCheckTime: 0.0s, AutomataDifference: 495.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3588 SdHoareTripleChecker+Valid, 13.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3588 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 10.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 648 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 26203 IncrementalHoareTripleChecker+Invalid, 26851 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 648 mSolverCounterUnsat, 0 mSDtfsCounter, 26203 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3693 GetRequests, 1920 SyntacticMatches, 257 SemanticMatches, 1516 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8951 ImplicationChecksByTransitivity, 11.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=123861occurred in iteration=88, InterpolantAutomatonStates: 1231, 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: 1.2s SsaConstructionTime, 2.7s SatisfiabilityAnalysisTime, 20.3s InterpolantComputationTime, 2786 NumberOfCodeBlocks, 2786 NumberOfCodeBlocksAsserted, 259 NumberOfCheckSat, 3863 ConstructedInterpolants, 0 QuantifiedInterpolants, 20595 SizeOfPredicates, 195 NumberOfNonLiveVariables, 15834 ConjunctsInSsa, 910 ConjunctsInUnsatCore, 247 InterpolantComputations, 10 PerfectInterpolantSequences, 462/1418 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