/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 16:13:37,279 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 16:13:37,318 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf [2023-11-17 16:13:37,338 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 16:13:37,338 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 16:13:37,339 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 16:13:37,339 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 16:13:37,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 16:13:37,339 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 16:13:37,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 16:13:37,340 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 16:13:37,340 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 16:13:37,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 16:13:37,341 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 16:13:37,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 16:13:37,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 16:13:37,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 16:13:37,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 16:13:37,342 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 16:13:37,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 16:13:37,342 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 16:13:37,346 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 16:13:37,346 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 16:13:37,347 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 16:13:37,348 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 16:13:37,348 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:13:37,349 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 16:13:37,349 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 16:13:37,349 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 16:13:37,349 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 16:13:37,349 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 16:13:37,349 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 16:13:37,350 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 16:13:37,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 16:13:37,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 16:13:37,564 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 16:13:37,565 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 16:13:37,566 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 16:13:37,567 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-11-17 16:13:38,656 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 16:13:38,825 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 16:13:38,826 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c [2023-11-17 16:13:38,833 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36324ec4/cb16ba763f3941ffab7ca34e9251e1dc/FLAG9d8849a62 [2023-11-17 16:13:38,850 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b36324ec4/cb16ba763f3941ffab7ca34e9251e1dc [2023-11-17 16:13:38,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 16:13:38,854 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 16:13:38,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 16:13:38,858 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 16:13:38,862 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 16:13:38,863 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:13:38" (1/1) ... [2023-11-17 16:13:38,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4762e610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:38, skipping insertion in model container [2023-11-17 16:13:38,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 04:13:38" (1/1) ... [2023-11-17 16:13:38,886 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 16:13:39,039 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-17 16:13:39,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:13:39,050 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 16:13:39,063 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-figure1-alt.wvr.c[2113,2126] [2023-11-17 16:13:39,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 16:13:39,069 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:13:39,069 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-17 16:13:39,074 INFO L206 MainTranslator]: Completed translation [2023-11-17 16:13:39,075 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39 WrapperNode [2023-11-17 16:13:39,075 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 16:13:39,076 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 16:13:39,076 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 16:13:39,076 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 16:13:39,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,087 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,104 INFO L138 Inliner]: procedures = 21, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 79 [2023-11-17 16:13:39,104 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 16:13:39,105 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 16:13:39,105 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 16:13:39,105 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 16:13:39,112 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,112 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,113 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,113 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,116 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,118 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,123 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,125 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 16:13:39,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 16:13:39,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 16:13:39,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 16:13:39,126 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (1/1) ... [2023-11-17 16:13:39,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 16:13:39,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:39,158 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-17 16:13:39,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-17 16:13:39,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 16:13:39,182 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-17 16:13:39,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-17 16:13:39,183 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-17 16:13:39,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 16:13:39,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 16:13:39,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 16:13:39,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 16:13:39,186 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 16:13:39,261 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 16:13:39,263 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 16:13:39,393 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 16:13:39,436 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 16:13:39,437 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 16:13:39,438 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:13:39 BoogieIcfgContainer [2023-11-17 16:13:39,438 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 16:13:39,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 16:13:39,440 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 16:13:39,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 16:13:39,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 04:13:38" (1/3) ... [2023-11-17 16:13:39,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63767608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:13:39, skipping insertion in model container [2023-11-17 16:13:39,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 04:13:39" (2/3) ... [2023-11-17 16:13:39,442 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63767608 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 04:13:39, skipping insertion in model container [2023-11-17 16:13:39,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 04:13:39" (3/3) ... [2023-11-17 16:13:39,443 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1-alt.wvr.c [2023-11-17 16:13:39,463 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 16:13:39,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 16:13:39,464 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 16:13:39,500 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 16:13:39,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 196 flow [2023-11-17 16:13:39,563 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-17 16:13:39,563 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:13:39,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 89 events. 6/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 56 event pairs, 0 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-17 16:13:39,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 196 flow [2023-11-17 16:13:39,570 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 80 transitions, 172 flow [2023-11-17 16:13:39,573 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 16:13:39,584 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 80 transitions, 172 flow [2023-11-17 16:13:39,586 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 80 transitions, 172 flow [2023-11-17 16:13:39,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 80 transitions, 172 flow [2023-11-17 16:13:39,621 INFO L124 PetriNetUnfolderBase]: 6/80 cut-off events. [2023-11-17 16:13:39,622 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:13:39,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 6/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 55 event pairs, 0 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-11-17 16:13:39,623 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-17 16:13:41,296 INFO L134 LiptonReduction]: Checked pairs total: 667 [2023-11-17 16:13:41,296 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-11-17 16:13:41,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 16:13:41,311 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;@8de2634, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 16:13:41,311 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-17 16:13:41,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 16:13:41,315 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 16:13:41,315 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-17 16:13:41,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:41,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:41,315 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 16:13:41,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1955877256, now seen corresponding path program 1 times [2023-11-17 16:13:41,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:41,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935298423] [2023-11-17 16:13:41,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:41,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:41,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:41,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935298423] [2023-11-17 16:13:41,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935298423] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:41,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:41,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217955961] [2023-11-17 16:13:41,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:41,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:41,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:41,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:41,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:41,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:41,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:41,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:41,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:41,990 INFO L124 PetriNetUnfolderBase]: 98/184 cut-off events. [2023-11-17 16:13:41,990 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-11-17 16:13:41,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 184 events. 98/184 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 576 event pairs, 32 based on Foata normal form. 1/139 useless extension candidates. Maximal degree in co-relation 292. Up to 85 conditions per place. [2023-11-17 16:13:41,992 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 36 selfloop transitions, 10 changer transitions 5/51 dead transitions. [2023-11-17 16:13:41,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 51 transitions, 240 flow [2023-11-17 16:13:41,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:41,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 479 transitions. [2023-11-17 16:13:42,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407312925170068 [2023-11-17 16:13:42,003 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 479 transitions. [2023-11-17 16:13:42,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 479 transitions. [2023-11-17 16:13:42,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:42,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 479 transitions. [2023-11-17 16:13:42,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.42857142857143) internal successors, (479), 7 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,015 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,016 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 479 transitions. [2023-11-17 16:13:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 51 transitions, 240 flow [2023-11-17 16:13:42,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 51 transitions, 216 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-17 16:13:42,019 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 100 flow [2023-11-17 16:13:42,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=100, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-11-17 16:13:42,023 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-11-17 16:13:42,023 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 100 flow [2023-11-17 16:13:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:42,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:42,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 16:13:42,024 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 16:13:42,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:42,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1577096610, now seen corresponding path program 2 times [2023-11-17 16:13:42,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:42,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712712735] [2023-11-17 16:13:42,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:42,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:42,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:42,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712712735] [2023-11-17 16:13:42,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712712735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:42,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:42,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:42,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529925581] [2023-11-17 16:13:42,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:42,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:42,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:42,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:42,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:42,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:42,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 100 flow. Second operand has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:42,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:42,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:42,329 INFO L124 PetriNetUnfolderBase]: 109/209 cut-off events. [2023-11-17 16:13:42,329 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-11-17 16:13:42,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 209 events. 109/209 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 713 event pairs, 12 based on Foata normal form. 1/210 useless extension candidates. Maximal degree in co-relation 613. Up to 125 conditions per place. [2023-11-17 16:13:42,331 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 42 selfloop transitions, 14 changer transitions 5/61 dead transitions. [2023-11-17 16:13:42,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 61 transitions, 354 flow [2023-11-17 16:13:42,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:42,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:42,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2023-11-17 16:13:42,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40901360544217685 [2023-11-17 16:13:42,334 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2023-11-17 16:13:42,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2023-11-17 16:13:42,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:42,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2023-11-17 16:13:42,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,338 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,338 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 100 flow. Second operand 7 states and 481 transitions. [2023-11-17 16:13:42,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 61 transitions, 354 flow [2023-11-17 16:13:42,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 61 transitions, 338 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-11-17 16:13:42,341 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 191 flow [2023-11-17 16:13:42,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=191, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-11-17 16:13:42,342 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-11-17 16:13:42,342 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 191 flow [2023-11-17 16:13:42,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,342 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:42,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:42,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 16:13:42,343 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 16:13:42,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:42,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1874789880, now seen corresponding path program 3 times [2023-11-17 16:13:42,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:42,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837256853] [2023-11-17 16:13:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:42,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:42,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:42,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:42,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837256853] [2023-11-17 16:13:42,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837256853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:42,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:42,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:42,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481015599] [2023-11-17 16:13:42,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:42,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:42,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:42,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:42,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:42,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 191 flow. Second operand has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:42,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:42,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:42,636 INFO L124 PetriNetUnfolderBase]: 115/219 cut-off events. [2023-11-17 16:13:42,637 INFO L125 PetriNetUnfolderBase]: For 312/312 co-relation queries the response was YES. [2023-11-17 16:13:42,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 813 conditions, 219 events. 115/219 cut-off events. For 312/312 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 743 event pairs, 32 based on Foata normal form. 1/220 useless extension candidates. Maximal degree in co-relation 788. Up to 95 conditions per place. [2023-11-17 16:13:42,641 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 33 selfloop transitions, 21 changer transitions 5/59 dead transitions. [2023-11-17 16:13:42,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 59 transitions, 428 flow [2023-11-17 16:13:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:42,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2023-11-17 16:13:42,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2023-11-17 16:13:42,643 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2023-11-17 16:13:42,643 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2023-11-17 16:13:42,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:42,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2023-11-17 16:13:42,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,647 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,647 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 191 flow. Second operand 7 states and 476 transitions. [2023-11-17 16:13:42,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 59 transitions, 428 flow [2023-11-17 16:13:42,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 59 transitions, 398 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:42,652 INFO L231 Difference]: Finished difference. Result has 43 places, 38 transitions, 279 flow [2023-11-17 16:13:42,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=279, PETRI_PLACES=43, PETRI_TRANSITIONS=38} [2023-11-17 16:13:42,653 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-11-17 16:13:42,653 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 38 transitions, 279 flow [2023-11-17 16:13:42,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:42,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:42,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 16:13:42,654 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 16:13:42,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 750816584, now seen corresponding path program 4 times [2023-11-17 16:13:42,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:42,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850781588] [2023-11-17 16:13:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:42,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:42,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:42,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850781588] [2023-11-17 16:13:42,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850781588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:42,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:42,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:42,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425974701] [2023-11-17 16:13:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:42,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:42,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:42,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:42,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 38 transitions, 279 flow. Second operand has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:42,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:42,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:42,912 INFO L124 PetriNetUnfolderBase]: 129/247 cut-off events. [2023-11-17 16:13:42,913 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-11-17 16:13:42,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 986 conditions, 247 events. 129/247 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 893 event pairs, 22 based on Foata normal form. 1/248 useless extension candidates. Maximal degree in co-relation 955. Up to 155 conditions per place. [2023-11-17 16:13:42,915 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 35 selfloop transitions, 24 changer transitions 5/64 dead transitions. [2023-11-17 16:13:42,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 532 flow [2023-11-17 16:13:42,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:42,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 474 transitions. [2023-11-17 16:13:42,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4030612244897959 [2023-11-17 16:13:42,917 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 474 transitions. [2023-11-17 16:13:42,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 474 transitions. [2023-11-17 16:13:42,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:42,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 474 transitions. [2023-11-17 16:13:42,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.71428571428571) internal successors, (474), 7 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,920 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:42,920 INFO L175 Difference]: Start difference. First operand has 43 places, 38 transitions, 279 flow. Second operand 7 states and 474 transitions. [2023-11-17 16:13:42,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 532 flow [2023-11-17 16:13:42,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 64 transitions, 496 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-17 16:13:42,923 INFO L231 Difference]: Finished difference. Result has 48 places, 45 transitions, 390 flow [2023-11-17 16:13:42,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=48, PETRI_TRANSITIONS=45} [2023-11-17 16:13:42,924 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-11-17 16:13:42,924 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 45 transitions, 390 flow [2023-11-17 16:13:42,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:42,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:42,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:42,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 16:13:42,924 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 16:13:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash -936886930, now seen corresponding path program 5 times [2023-11-17 16:13:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:42,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28459495] [2023-11-17 16:13:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:42,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:43,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:43,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:43,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28459495] [2023-11-17 16:13:43,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28459495] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:43,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:43,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508084286] [2023-11-17 16:13:43,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:43,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:43,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:43,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:43,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 45 transitions, 390 flow. Second operand has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:43,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:43,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:43,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:43,145 INFO L124 PetriNetUnfolderBase]: 140/272 cut-off events. [2023-11-17 16:13:43,145 INFO L125 PetriNetUnfolderBase]: For 696/696 co-relation queries the response was YES. [2023-11-17 16:13:43,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 272 events. 140/272 cut-off events. For 696/696 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1031 event pairs, 30 based on Foata normal form. 1/273 useless extension candidates. Maximal degree in co-relation 1136. Up to 159 conditions per place. [2023-11-17 16:13:43,147 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 37 selfloop transitions, 26 changer transitions 5/68 dead transitions. [2023-11-17 16:13:43,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 68 transitions, 611 flow [2023-11-17 16:13:43,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:43,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 476 transitions. [2023-11-17 16:13:43,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2023-11-17 16:13:43,149 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 476 transitions. [2023-11-17 16:13:43,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 476 transitions. [2023-11-17 16:13:43,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:43,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 476 transitions. [2023-11-17 16:13:43,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.0) internal successors, (476), 7 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,152 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,152 INFO L175 Difference]: Start difference. First operand has 48 places, 45 transitions, 390 flow. Second operand 7 states and 476 transitions. [2023-11-17 16:13:43,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 68 transitions, 611 flow [2023-11-17 16:13:43,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 68 transitions, 570 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-11-17 16:13:43,155 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 445 flow [2023-11-17 16:13:43,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=445, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2023-11-17 16:13:43,156 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 34 predicate places. [2023-11-17 16:13:43,156 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 445 flow [2023-11-17 16:13:43,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:43,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:43,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:43,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 16:13:43,157 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 16:13:43,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:43,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1408396894, now seen corresponding path program 6 times [2023-11-17 16:13:43,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:43,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035920571] [2023-11-17 16:13:43,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:43,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:43,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:43,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:43,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:43,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035920571] [2023-11-17 16:13:43,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035920571] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:43,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:43,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-17 16:13:43,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445572211] [2023-11-17 16:13:43,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:43,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 16:13:43,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:43,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 16:13:43,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-17 16:13:43,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:43,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 445 flow. Second operand has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:43,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:43,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:43,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:43,405 INFO L124 PetriNetUnfolderBase]: 137/263 cut-off events. [2023-11-17 16:13:43,405 INFO L125 PetriNetUnfolderBase]: For 841/841 co-relation queries the response was YES. [2023-11-17 16:13:43,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1204 conditions, 263 events. 137/263 cut-off events. For 841/841 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 966 event pairs, 46 based on Foata normal form. 1/264 useless extension candidates. Maximal degree in co-relation 1168. Up to 123 conditions per place. [2023-11-17 16:13:43,407 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 36 selfloop transitions, 28 changer transitions 5/69 dead transitions. [2023-11-17 16:13:43,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 69 transitions, 657 flow [2023-11-17 16:13:43,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-17 16:13:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-17 16:13:43,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 478 transitions. [2023-11-17 16:13:43,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4064625850340136 [2023-11-17 16:13:43,409 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 478 transitions. [2023-11-17 16:13:43,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 478 transitions. [2023-11-17 16:13:43,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:43,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 478 transitions. [2023-11-17 16:13:43,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.28571428571429) internal successors, (478), 7 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,413 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 168.0) internal successors, (1344), 8 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,413 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 445 flow. Second operand 7 states and 478 transitions. [2023-11-17 16:13:43,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 69 transitions, 657 flow [2023-11-17 16:13:43,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 616 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-11-17 16:13:43,417 INFO L231 Difference]: Finished difference. Result has 56 places, 47 transitions, 464 flow [2023-11-17 16:13:43,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=464, PETRI_PLACES=56, PETRI_TRANSITIONS=47} [2023-11-17 16:13:43,418 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 36 predicate places. [2023-11-17 16:13:43,418 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 47 transitions, 464 flow [2023-11-17 16:13:43,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 62.857142857142854) internal successors, (440), 7 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 16:13:43,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:43,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:43,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-17 16:13:43,419 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 16:13:43,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:43,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1336044782, now seen corresponding path program 1 times [2023-11-17 16:13:43,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:43,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622558223] [2023-11-17 16:13:43,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:43,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:43,440 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 16:13:43,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:43,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622558223] [2023-11-17 16:13:43,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622558223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 16:13:43,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 16:13:43,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-17 16:13:43,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640299809] [2023-11-17 16:13:43,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 16:13:43,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 16:13:43,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:43,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 16:13:43,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 16:13:43,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 168 [2023-11-17 16:13:43,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 47 transitions, 464 flow. Second operand has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:43,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 168 [2023-11-17 16:13:43,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:43,473 INFO L124 PetriNetUnfolderBase]: 60/125 cut-off events. [2023-11-17 16:13:43,473 INFO L125 PetriNetUnfolderBase]: For 681/681 co-relation queries the response was YES. [2023-11-17 16:13:43,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 583 conditions, 125 events. 60/125 cut-off events. For 681/681 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 376 event pairs, 26 based on Foata normal form. 18/143 useless extension candidates. Maximal degree in co-relation 559. Up to 67 conditions per place. [2023-11-17 16:13:43,474 INFO L140 encePairwiseOnDemand]: 165/168 looper letters, 24 selfloop transitions, 7 changer transitions 6/37 dead transitions. [2023-11-17 16:13:43,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 37 transitions, 375 flow [2023-11-17 16:13:43,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 16:13:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 16:13:43,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 259 transitions. [2023-11-17 16:13:43,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2023-11-17 16:13:43,475 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 259 transitions. [2023-11-17 16:13:43,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 259 transitions. [2023-11-17 16:13:43,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:43,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 259 transitions. [2023-11-17 16:13:43,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.33333333333333) internal successors, (259), 3 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,477 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 168.0) internal successors, (672), 4 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,477 INFO L175 Difference]: Start difference. First operand has 56 places, 47 transitions, 464 flow. Second operand 3 states and 259 transitions. [2023-11-17 16:13:43,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 37 transitions, 375 flow [2023-11-17 16:13:43,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 37 transitions, 297 flow, removed 1 selfloop flow, removed 12 redundant places. [2023-11-17 16:13:43,479 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 181 flow [2023-11-17 16:13:43,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2023-11-17 16:13:43,480 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-17 16:13:43,480 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 181 flow [2023-11-17 16:13:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.66666666666667) internal successors, (248), 3 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:43,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:43,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 16:13:43,481 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 16:13:43,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:43,481 INFO L85 PathProgramCache]: Analyzing trace with hash 424857833, now seen corresponding path program 1 times [2023-11-17 16:13:43,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:43,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75930962] [2023-11-17 16:13:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:43,592 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 16:13:43,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75930962] [2023-11-17 16:13:43,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75930962] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:43,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408285103] [2023-11-17 16:13:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:43,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:43,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:43,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:43,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 16:13:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:43,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:43,663 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:43,788 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 16:13:43,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:43,875 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 16:13:43,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408285103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:43,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:43,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:43,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496606648] [2023-11-17 16:13:43,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:43,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:43,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:43,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:43,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:43,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:43,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 181 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:43,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:43,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:43,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:44,256 INFO L124 PetriNetUnfolderBase]: 140/296 cut-off events. [2023-11-17 16:13:44,256 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-17 16:13:44,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 926 conditions, 296 events. 140/296 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1257 event pairs, 10 based on Foata normal form. 17/313 useless extension candidates. Maximal degree in co-relation 885. Up to 73 conditions per place. [2023-11-17 16:13:44,258 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 67 selfloop transitions, 24 changer transitions 25/116 dead transitions. [2023-11-17 16:13:44,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 116 transitions, 674 flow [2023-11-17 16:13:44,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:13:44,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:13:44,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1211 transitions. [2023-11-17 16:13:44,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40046296296296297 [2023-11-17 16:13:44,261 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1211 transitions. [2023-11-17 16:13:44,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1211 transitions. [2023-11-17 16:13:44,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:44,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1211 transitions. [2023-11-17 16:13:44,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 67.27777777777777) internal successors, (1211), 18 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,267 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,267 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 181 flow. Second operand 18 states and 1211 transitions. [2023-11-17 16:13:44,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 116 transitions, 674 flow [2023-11-17 16:13:44,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 116 transitions, 647 flow, removed 3 selfloop flow, removed 8 redundant places. [2023-11-17 16:13:44,269 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 308 flow [2023-11-17 16:13:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=308, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-11-17 16:13:44,270 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-17 16:13:44,270 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 308 flow [2023-11-17 16:13:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:44,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:44,278 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 16:13:44,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:44,475 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 16:13:44,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:44,476 INFO L85 PathProgramCache]: Analyzing trace with hash -261664481, now seen corresponding path program 2 times [2023-11-17 16:13:44,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:44,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101532667] [2023-11-17 16:13:44,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:44,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:44,599 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 16:13:44,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:44,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101532667] [2023-11-17 16:13:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101532667] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:44,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880387989] [2023-11-17 16:13:44,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:13:44,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:44,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:44,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-17 16:13:44,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:44,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:44,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:44,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:44,796 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 16:13:44,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:44,901 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 16:13:44,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880387989] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:44,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:44,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:44,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278992928] [2023-11-17 16:13:44,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:44,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:44,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:44,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:44,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:44,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:44,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 308 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:44,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:44,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:44,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:45,398 INFO L124 PetriNetUnfolderBase]: 182/396 cut-off events. [2023-11-17 16:13:45,398 INFO L125 PetriNetUnfolderBase]: For 1148/1148 co-relation queries the response was YES. [2023-11-17 16:13:45,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 396 events. 182/396 cut-off events. For 1148/1148 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1860 event pairs, 22 based on Foata normal form. 3/399 useless extension candidates. Maximal degree in co-relation 1607. Up to 127 conditions per place. [2023-11-17 16:13:45,401 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 84 selfloop transitions, 46 changer transitions 17/147 dead transitions. [2023-11-17 16:13:45,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 147 transitions, 1100 flow [2023-11-17 16:13:45,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:13:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:13:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1660 transitions. [2023-11-17 16:13:45,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2023-11-17 16:13:45,405 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1660 transitions. [2023-11-17 16:13:45,405 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1660 transitions. [2023-11-17 16:13:45,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:45,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1660 transitions. [2023-11-17 16:13:45,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 66.4) internal successors, (1660), 25 states have internal predecessors, (1660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,413 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,413 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 308 flow. Second operand 25 states and 1660 transitions. [2023-11-17 16:13:45,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 147 transitions, 1100 flow [2023-11-17 16:13:45,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 147 transitions, 937 flow, removed 77 selfloop flow, removed 6 redundant places. [2023-11-17 16:13:45,417 INFO L231 Difference]: Finished difference. Result has 84 places, 65 transitions, 541 flow [2023-11-17 16:13:45,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=541, PETRI_PLACES=84, PETRI_TRANSITIONS=65} [2023-11-17 16:13:45,418 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-17 16:13:45,418 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 65 transitions, 541 flow [2023-11-17 16:13:45,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:45,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:45,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:45,426 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 16:13:45,623 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,SelfDestructingSolverStorable8 [2023-11-17 16:13:45,624 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 16:13:45,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash -284555501, now seen corresponding path program 3 times [2023-11-17 16:13:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:45,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702347851] [2023-11-17 16:13:45,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:45,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:45,741 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 16:13:45,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:45,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702347851] [2023-11-17 16:13:45,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702347851] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:45,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698930295] [2023-11-17 16:13:45,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:13:45,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:45,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:45,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:45,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-17 16:13:45,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:13:45,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:45,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:45,794 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:45,923 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 16:13:45,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:46,033 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 16:13:46,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698930295] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:46,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:46,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:46,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948811556] [2023-11-17 16:13:46,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:46,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:46,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:46,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:46,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:46,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:46,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 65 transitions, 541 flow. Second operand has 19 states, 19 states have (on average 63.10526315789474) internal successors, (1199), 19 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:46,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:46,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:46,538 INFO L124 PetriNetUnfolderBase]: 180/377 cut-off events. [2023-11-17 16:13:46,538 INFO L125 PetriNetUnfolderBase]: For 1783/1783 co-relation queries the response was YES. [2023-11-17 16:13:46,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 377 events. 180/377 cut-off events. For 1783/1783 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1688 event pairs, 18 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 1783. Up to 129 conditions per place. [2023-11-17 16:13:46,540 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 62 selfloop transitions, 39 changer transitions 34/135 dead transitions. [2023-11-17 16:13:46,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 135 transitions, 1090 flow [2023-11-17 16:13:46,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:13:46,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:13:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1464 transitions. [2023-11-17 16:13:46,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3961038961038961 [2023-11-17 16:13:46,560 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1464 transitions. [2023-11-17 16:13:46,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1464 transitions. [2023-11-17 16:13:46,561 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:46,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1464 transitions. [2023-11-17 16:13:46,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.54545454545455) internal successors, (1464), 22 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,567 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,567 INFO L175 Difference]: Start difference. First operand has 84 places, 65 transitions, 541 flow. Second operand 22 states and 1464 transitions. [2023-11-17 16:13:46,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 135 transitions, 1090 flow [2023-11-17 16:13:46,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 135 transitions, 984 flow, removed 31 selfloop flow, removed 9 redundant places. [2023-11-17 16:13:46,572 INFO L231 Difference]: Finished difference. Result has 97 places, 60 transitions, 506 flow [2023-11-17 16:13:46,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=506, PETRI_PLACES=97, PETRI_TRANSITIONS=60} [2023-11-17 16:13:46,573 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-11-17 16:13:46,573 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 60 transitions, 506 flow [2023-11-17 16:13:46,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.10526315789474) internal successors, (1199), 19 states have internal predecessors, (1199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:46,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:46,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:46,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:46,778 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 16:13:46,778 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 16:13:46,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:46,779 INFO L85 PathProgramCache]: Analyzing trace with hash 779171725, now seen corresponding path program 4 times [2023-11-17 16:13:46,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:46,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786074830] [2023-11-17 16:13:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:46,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:46,911 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 16:13:46,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786074830] [2023-11-17 16:13:46,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786074830] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:46,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379306429] [2023-11-17 16:13:46,911 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:13:46,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:46,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:46,925 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:46,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-17 16:13:46,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:13:46,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:46,972 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:46,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:47,080 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 16:13:47,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:47,188 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 16:13:47,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379306429] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:47,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:47,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:47,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753117823] [2023-11-17 16:13:47,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:47,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:47,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:47,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:47,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:47,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:47,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 60 transitions, 506 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:47,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:47,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:47,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:47,354 INFO L124 PetriNetUnfolderBase]: 167/346 cut-off events. [2023-11-17 16:13:47,355 INFO L125 PetriNetUnfolderBase]: For 1929/1929 co-relation queries the response was YES. [2023-11-17 16:13:47,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 346 events. 167/346 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1457 event pairs, 24 based on Foata normal form. 2/346 useless extension candidates. Maximal degree in co-relation 1730. Up to 268 conditions per place. [2023-11-17 16:13:47,357 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 55 selfloop transitions, 23 changer transitions 10/88 dead transitions. [2023-11-17 16:13:47,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 88 transitions, 787 flow [2023-11-17 16:13:47,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-17 16:13:47,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-17 16:13:47,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 854 transitions. [2023-11-17 16:13:47,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391025641025641 [2023-11-17 16:13:47,374 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 854 transitions. [2023-11-17 16:13:47,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 854 transitions. [2023-11-17 16:13:47,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:47,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 854 transitions. [2023-11-17 16:13:47,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 65.6923076923077) internal successors, (854), 13 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:47,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:47,378 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 168.0) internal successors, (2352), 14 states have internal predecessors, (2352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:47,378 INFO L175 Difference]: Start difference. First operand has 97 places, 60 transitions, 506 flow. Second operand 13 states and 854 transitions. [2023-11-17 16:13:47,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 88 transitions, 787 flow [2023-11-17 16:13:47,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 706 flow, removed 11 selfloop flow, removed 16 redundant places. [2023-11-17 16:13:47,383 INFO L231 Difference]: Finished difference. Result has 84 places, 62 transitions, 509 flow [2023-11-17 16:13:47,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=62} [2023-11-17 16:13:47,383 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-17 16:13:47,384 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 62 transitions, 509 flow [2023-11-17 16:13:47,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:47,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:47,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:47,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-17 16:13:47,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:47,589 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 16:13:47,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:47,589 INFO L85 PathProgramCache]: Analyzing trace with hash 535939039, now seen corresponding path program 5 times [2023-11-17 16:13:47,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:47,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487362336] [2023-11-17 16:13:47,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:47,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:47,682 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 16:13:47,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:47,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487362336] [2023-11-17 16:13:47,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487362336] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:47,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143195541] [2023-11-17 16:13:47,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:13:47,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:47,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:47,684 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:47,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-17 16:13:47,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:47,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:47,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:47,841 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 16:13:47,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:47,930 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 16:13:47,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143195541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:47,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:47,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:47,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792087320] [2023-11-17 16:13:47,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:47,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:47,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:47,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:47,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:47,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:47,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 62 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:47,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:47,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:47,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:48,109 INFO L124 PetriNetUnfolderBase]: 169/352 cut-off events. [2023-11-17 16:13:48,109 INFO L125 PetriNetUnfolderBase]: For 1166/1166 co-relation queries the response was YES. [2023-11-17 16:13:48,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 352 events. 169/352 cut-off events. For 1166/1166 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1487 event pairs, 39 based on Foata normal form. 2/352 useless extension candidates. Maximal degree in co-relation 1587. Up to 302 conditions per place. [2023-11-17 16:13:48,111 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 57 selfloop transitions, 15 changer transitions 10/82 dead transitions. [2023-11-17 16:13:48,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 82 transitions, 748 flow [2023-11-17 16:13:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-17 16:13:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-17 16:13:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 655 transitions. [2023-11-17 16:13:48,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2023-11-17 16:13:48,113 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 655 transitions. [2023-11-17 16:13:48,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 655 transitions. [2023-11-17 16:13:48,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:48,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 655 transitions. [2023-11-17 16:13:48,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 65.5) internal successors, (655), 10 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,121 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 168.0) internal successors, (1848), 11 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,121 INFO L175 Difference]: Start difference. First operand has 84 places, 62 transitions, 509 flow. Second operand 10 states and 655 transitions. [2023-11-17 16:13:48,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 82 transitions, 748 flow [2023-11-17 16:13:48,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 82 transitions, 682 flow, removed 2 selfloop flow, removed 11 redundant places. [2023-11-17 16:13:48,126 INFO L231 Difference]: Finished difference. Result has 84 places, 64 transitions, 509 flow [2023-11-17 16:13:48,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=509, PETRI_PLACES=84, PETRI_TRANSITIONS=64} [2023-11-17 16:13:48,129 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-11-17 16:13:48,129 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 64 transitions, 509 flow [2023-11-17 16:13:48,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:48,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:48,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:48,335 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,SelfDestructingSolverStorable11 [2023-11-17 16:13:48,335 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 16:13:48,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1948162507, now seen corresponding path program 6 times [2023-11-17 16:13:48,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:48,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020345481] [2023-11-17 16:13:48,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:48,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:48,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:48,486 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 16:13:48,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:48,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020345481] [2023-11-17 16:13:48,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020345481] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:48,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762833170] [2023-11-17 16:13:48,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:13:48,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:48,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:48,488 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:48,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-17 16:13:48,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:13:48,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:48,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:48,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:48,679 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 16:13:48,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:48,805 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 16:13:48,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762833170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:48,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:48,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468373124] [2023-11-17 16:13:48,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:48,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:48,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:48,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:48,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:48,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 64 transitions, 509 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:48,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:48,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:48,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:49,234 INFO L124 PetriNetUnfolderBase]: 169/366 cut-off events. [2023-11-17 16:13:49,234 INFO L125 PetriNetUnfolderBase]: For 1163/1163 co-relation queries the response was YES. [2023-11-17 16:13:49,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1659 conditions, 366 events. 169/366 cut-off events. For 1163/1163 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1643 event pairs, 17 based on Foata normal form. 4/368 useless extension candidates. Maximal degree in co-relation 1622. Up to 231 conditions per place. [2023-11-17 16:13:49,236 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 64 selfloop transitions, 31 changer transitions 21/116 dead transitions. [2023-11-17 16:13:49,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 982 flow [2023-11-17 16:13:49,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:13:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:13:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1304 transitions. [2023-11-17 16:13:49,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2023-11-17 16:13:49,238 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1304 transitions. [2023-11-17 16:13:49,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1304 transitions. [2023-11-17 16:13:49,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:49,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1304 transitions. [2023-11-17 16:13:49,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.2) internal successors, (1304), 20 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:49,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:49,244 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:49,244 INFO L175 Difference]: Start difference. First operand has 84 places, 64 transitions, 509 flow. Second operand 20 states and 1304 transitions. [2023-11-17 16:13:49,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 982 flow [2023-11-17 16:13:49,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 116 transitions, 948 flow, removed 4 selfloop flow, removed 7 redundant places. [2023-11-17 16:13:49,251 INFO L231 Difference]: Finished difference. Result has 102 places, 73 transitions, 673 flow [2023-11-17 16:13:49,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=477, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=673, PETRI_PLACES=102, PETRI_TRANSITIONS=73} [2023-11-17 16:13:49,252 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-17 16:13:49,252 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 73 transitions, 673 flow [2023-11-17 16:13:49,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:49,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:49,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:49,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:49,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:49,458 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 16:13:49,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:49,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1974678845, now seen corresponding path program 7 times [2023-11-17 16:13:49,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:49,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251993943] [2023-11-17 16:13:49,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:49,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:49,610 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 16:13:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251993943] [2023-11-17 16:13:49,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251993943] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450389829] [2023-11-17 16:13:49,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:13:49,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:49,626 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:49,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-17 16:13:49,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:49,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:49,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:13:49,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:49,918 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 16:13:49,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450389829] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:49,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:49,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:49,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580156181] [2023-11-17 16:13:49,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:49,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:49,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:49,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:49,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:49,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:49,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 73 transitions, 673 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:49,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:49,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:49,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:50,140 INFO L124 PetriNetUnfolderBase]: 151/325 cut-off events. [2023-11-17 16:13:50,140 INFO L125 PetriNetUnfolderBase]: For 1747/1747 co-relation queries the response was YES. [2023-11-17 16:13:50,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1705 conditions, 325 events. 151/325 cut-off events. For 1747/1747 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1375 event pairs, 17 based on Foata normal form. 3/326 useless extension candidates. Maximal degree in co-relation 1669. Up to 260 conditions per place. [2023-11-17 16:13:50,142 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 63 selfloop transitions, 22 changer transitions 11/96 dead transitions. [2023-11-17 16:13:50,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 96 transitions, 960 flow [2023-11-17 16:13:50,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:13:50,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:13:50,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 911 transitions. [2023-11-17 16:13:50,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38732993197278914 [2023-11-17 16:13:50,144 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 911 transitions. [2023-11-17 16:13:50,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 911 transitions. [2023-11-17 16:13:50,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:50,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 911 transitions. [2023-11-17 16:13:50,145 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.07142857142857) internal successors, (911), 14 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:50,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:50,147 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:50,147 INFO L175 Difference]: Start difference. First operand has 102 places, 73 transitions, 673 flow. Second operand 14 states and 911 transitions. [2023-11-17 16:13:50,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 96 transitions, 960 flow [2023-11-17 16:13:50,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 96 transitions, 856 flow, removed 34 selfloop flow, removed 10 redundant places. [2023-11-17 16:13:50,153 INFO L231 Difference]: Finished difference. Result has 103 places, 73 transitions, 641 flow [2023-11-17 16:13:50,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=641, PETRI_PLACES=103, PETRI_TRANSITIONS=73} [2023-11-17 16:13:50,154 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 83 predicate places. [2023-11-17 16:13:50,154 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 73 transitions, 641 flow [2023-11-17 16:13:50,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:50,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:50,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:50,168 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-17 16:13:50,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:50,366 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 16:13:50,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1975868137, now seen corresponding path program 8 times [2023-11-17 16:13:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:50,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627440301] [2023-11-17 16:13:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:50,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:50,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:50,465 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 16:13:50,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:50,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627440301] [2023-11-17 16:13:50,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627440301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:50,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075284152] [2023-11-17 16:13:50,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:13:50,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:50,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:50,481 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:50,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-17 16:13:50,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:50,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:50,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 16:13:50,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:50,663 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 16:13:50,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:50,762 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 16:13:50,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075284152] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:50,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:50,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-11-17 16:13:50,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737831112] [2023-11-17 16:13:50,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:50,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:50,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:50,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:50,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:50,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:50,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 73 transitions, 641 flow. Second operand has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:50,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:50,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:50,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:51,152 INFO L124 PetriNetUnfolderBase]: 148/304 cut-off events. [2023-11-17 16:13:51,153 INFO L125 PetriNetUnfolderBase]: For 1308/1308 co-relation queries the response was YES. [2023-11-17 16:13:51,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1534 conditions, 304 events. 148/304 cut-off events. For 1308/1308 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1211 event pairs, 17 based on Foata normal form. 3/305 useless extension candidates. Maximal degree in co-relation 1497. Up to 217 conditions per place. [2023-11-17 16:13:51,155 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 59 selfloop transitions, 29 changer transitions 18/106 dead transitions. [2023-11-17 16:13:51,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 106 transitions, 963 flow [2023-11-17 16:13:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:13:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:13:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1112 transitions. [2023-11-17 16:13:51,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38935574229691877 [2023-11-17 16:13:51,156 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1112 transitions. [2023-11-17 16:13:51,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1112 transitions. [2023-11-17 16:13:51,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:51,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1112 transitions. [2023-11-17 16:13:51,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 65.41176470588235) internal successors, (1112), 17 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:51,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:51,161 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:51,161 INFO L175 Difference]: Start difference. First operand has 103 places, 73 transitions, 641 flow. Second operand 17 states and 1112 transitions. [2023-11-17 16:13:51,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 106 transitions, 963 flow [2023-11-17 16:13:51,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 106 transitions, 917 flow, removed 3 selfloop flow, removed 10 redundant places. [2023-11-17 16:13:51,166 INFO L231 Difference]: Finished difference. Result has 102 places, 72 transitions, 663 flow [2023-11-17 16:13:51,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=663, PETRI_PLACES=102, PETRI_TRANSITIONS=72} [2023-11-17 16:13:51,167 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 82 predicate places. [2023-11-17 16:13:51,167 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 72 transitions, 663 flow [2023-11-17 16:13:51,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 63.0) internal successors, (1197), 19 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:51,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:51,167 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:51,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-17 16:13:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-17 16:13:51,372 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 16:13:51,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1973489354, now seen corresponding path program 1 times [2023-11-17 16:13:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786547688] [2023-11-17 16:13:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:51,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:51,489 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 16:13:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:51,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786547688] [2023-11-17 16:13:51,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786547688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:51,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16662258] [2023-11-17 16:13:51,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:51,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:51,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:51,491 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:51,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-17 16:13:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:51,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:13:51,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:51,654 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 16:13:51,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:51,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:51,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16662258] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:51,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:51,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 17 [2023-11-17 16:13:51,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881250593] [2023-11-17 16:13:51,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:51,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 16:13:51,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:51,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 16:13:51,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2023-11-17 16:13:51,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:51,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 72 transitions, 663 flow. Second operand has 19 states, 19 states have (on average 62.94736842105263) internal successors, (1196), 19 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:51,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:51,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:51,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:52,029 INFO L124 PetriNetUnfolderBase]: 181/363 cut-off events. [2023-11-17 16:13:52,029 INFO L125 PetriNetUnfolderBase]: For 2145/2145 co-relation queries the response was YES. [2023-11-17 16:13:52,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 363 events. 181/363 cut-off events. For 2145/2145 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1503 event pairs, 10 based on Foata normal form. 7/368 useless extension candidates. Maximal degree in co-relation 1868. Up to 103 conditions per place. [2023-11-17 16:13:52,033 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 58 selfloop transitions, 45 changer transitions 35/138 dead transitions. [2023-11-17 16:13:52,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 138 transitions, 1233 flow [2023-11-17 16:13:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-17 16:13:52,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-11-17 16:13:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1140 transitions. [2023-11-17 16:13:52,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39915966386554624 [2023-11-17 16:13:52,035 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1140 transitions. [2023-11-17 16:13:52,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1140 transitions. [2023-11-17 16:13:52,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:52,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1140 transitions. [2023-11-17 16:13:52,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 67.05882352941177) internal successors, (1140), 17 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:52,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:52,040 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 168.0) internal successors, (3024), 18 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:52,040 INFO L175 Difference]: Start difference. First operand has 102 places, 72 transitions, 663 flow. Second operand 17 states and 1140 transitions. [2023-11-17 16:13:52,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 138 transitions, 1233 flow [2023-11-17 16:13:52,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 138 transitions, 1094 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-11-17 16:13:52,050 INFO L231 Difference]: Finished difference. Result has 109 places, 74 transitions, 714 flow [2023-11-17 16:13:52,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=714, PETRI_PLACES=109, PETRI_TRANSITIONS=74} [2023-11-17 16:13:52,050 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 89 predicate places. [2023-11-17 16:13:52,050 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 74 transitions, 714 flow [2023-11-17 16:13:52,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 62.94736842105263) internal successors, (1196), 19 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:52,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:52,051 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:52,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-17 16:13:52,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-17 16:13:52,257 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 16:13:52,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash 7024895, now seen corresponding path program 9 times [2023-11-17 16:13:52,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:52,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538280788] [2023-11-17 16:13:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:52,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:52,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:52,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:52,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538280788] [2023-11-17 16:13:52,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538280788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:52,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137606539] [2023-11-17 16:13:52,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:13:52,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:52,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:52,401 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:52,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-17 16:13:52,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:13:52,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:52,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:13:52,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:52,651 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 16:13:52,651 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:52,785 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 16:13:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137606539] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:52,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:13:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757978710] [2023-11-17 16:13:52,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:13:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:52,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:13:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:13:52,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:52,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 74 transitions, 714 flow. Second operand has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:52,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:52,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:52,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:53,837 INFO L124 PetriNetUnfolderBase]: 353/684 cut-off events. [2023-11-17 16:13:53,837 INFO L125 PetriNetUnfolderBase]: For 5915/5915 co-relation queries the response was YES. [2023-11-17 16:13:53,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3833 conditions, 684 events. 353/684 cut-off events. For 5915/5915 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3290 event pairs, 12 based on Foata normal form. 4/688 useless extension candidates. Maximal degree in co-relation 3790. Up to 193 conditions per place. [2023-11-17 16:13:53,843 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 125 selfloop transitions, 114 changer transitions 16/255 dead transitions. [2023-11-17 16:13:53,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 255 transitions, 2456 flow [2023-11-17 16:13:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-17 16:13:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-11-17 16:13:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3094 transitions. [2023-11-17 16:13:53,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39184397163120566 [2023-11-17 16:13:53,850 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3094 transitions. [2023-11-17 16:13:53,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3094 transitions. [2023-11-17 16:13:53,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:53,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3094 transitions. [2023-11-17 16:13:53,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 65.82978723404256) internal successors, (3094), 47 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 168.0) internal successors, (8064), 48 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,861 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 168.0) internal successors, (8064), 48 states have internal predecessors, (8064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,861 INFO L175 Difference]: Start difference. First operand has 109 places, 74 transitions, 714 flow. Second operand 47 states and 3094 transitions. [2023-11-17 16:13:53,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 255 transitions, 2456 flow [2023-11-17 16:13:53,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 255 transitions, 2045 flow, removed 168 selfloop flow, removed 15 redundant places. [2023-11-17 16:13:53,898 INFO L231 Difference]: Finished difference. Result has 148 places, 138 transitions, 1466 flow [2023-11-17 16:13:53,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1466, PETRI_PLACES=148, PETRI_TRANSITIONS=138} [2023-11-17 16:13:53,899 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 128 predicate places. [2023-11-17 16:13:53,899 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 138 transitions, 1466 flow [2023-11-17 16:13:53,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:53,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:53,899 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:53,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:54,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-17 16:13:54,100 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 16:13:54,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:54,100 INFO L85 PathProgramCache]: Analyzing trace with hash -473744403, now seen corresponding path program 10 times [2023-11-17 16:13:54,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:54,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455153370] [2023-11-17 16:13:54,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:54,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:54,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455153370] [2023-11-17 16:13:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455153370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389153748] [2023-11-17 16:13:54,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:13:54,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:54,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:54,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-17 16:13:54,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:13:54,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:54,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:13:54,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:54,403 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 16:13:54,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:54,527 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 16:13:54,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389153748] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:54,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:54,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:13:54,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611005150] [2023-11-17 16:13:54,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:54,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:13:54,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:54,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:13:54,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:13:54,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:54,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 138 transitions, 1466 flow. Second operand has 24 states, 24 states have (on average 62.916666666666664) internal successors, (1510), 24 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:54,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:54,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:54,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:55,145 INFO L124 PetriNetUnfolderBase]: 414/828 cut-off events. [2023-11-17 16:13:55,146 INFO L125 PetriNetUnfolderBase]: For 9752/9752 co-relation queries the response was YES. [2023-11-17 16:13:55,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5100 conditions, 828 events. 414/828 cut-off events. For 9752/9752 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4288 event pairs, 50 based on Foata normal form. 3/831 useless extension candidates. Maximal degree in co-relation 5049. Up to 301 conditions per place. [2023-11-17 16:13:55,152 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 126 selfloop transitions, 81 changer transitions 33/240 dead transitions. [2023-11-17 16:13:55,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 240 transitions, 2611 flow [2023-11-17 16:13:55,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-17 16:13:55,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-17 16:13:55,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1546 transitions. [2023-11-17 16:13:55,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4001035196687371 [2023-11-17 16:13:55,154 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1546 transitions. [2023-11-17 16:13:55,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1546 transitions. [2023-11-17 16:13:55,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:55,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1546 transitions. [2023-11-17 16:13:55,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 67.21739130434783) internal successors, (1546), 23 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,160 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 168.0) internal successors, (4032), 24 states have internal predecessors, (4032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,160 INFO L175 Difference]: Start difference. First operand has 148 places, 138 transitions, 1466 flow. Second operand 23 states and 1546 transitions. [2023-11-17 16:13:55,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 240 transitions, 2611 flow [2023-11-17 16:13:55,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 240 transitions, 1988 flow, removed 234 selfloop flow, removed 23 redundant places. [2023-11-17 16:13:55,184 INFO L231 Difference]: Finished difference. Result has 145 places, 148 transitions, 1168 flow [2023-11-17 16:13:55,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=941, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1168, PETRI_PLACES=145, PETRI_TRANSITIONS=148} [2023-11-17 16:13:55,184 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-11-17 16:13:55,184 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 148 transitions, 1168 flow [2023-11-17 16:13:55,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.916666666666664) internal successors, (1510), 24 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:55,185 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:55,200 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-17 16:13:55,390 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 16:13:55,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash -14424625, now seen corresponding path program 11 times [2023-11-17 16:13:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705291416] [2023-11-17 16:13:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:55,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:55,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:55,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705291416] [2023-11-17 16:13:55,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705291416] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:55,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738541665] [2023-11-17 16:13:55,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:13:55,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:55,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:55,541 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:55,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-17 16:13:55,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:13:55,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:55,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:13:55,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:55,753 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 16:13:55,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:55,883 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 16:13:55,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738541665] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:55,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:55,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:13:55,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523383591] [2023-11-17 16:13:55,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:55,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:13:55,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:55,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:13:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:13:55,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:55,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 148 transitions, 1168 flow. Second operand has 24 states, 24 states have (on average 62.875) internal successors, (1509), 24 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:55,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:55,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:55,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:57,056 INFO L124 PetriNetUnfolderBase]: 403/797 cut-off events. [2023-11-17 16:13:57,056 INFO L125 PetriNetUnfolderBase]: For 7876/7876 co-relation queries the response was YES. [2023-11-17 16:13:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4284 conditions, 797 events. 403/797 cut-off events. For 7876/7876 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4046 event pairs, 18 based on Foata normal form. 5/800 useless extension candidates. Maximal degree in co-relation 4242. Up to 183 conditions per place. [2023-11-17 16:13:57,062 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 116 selfloop transitions, 115 changer transitions 25/256 dead transitions. [2023-11-17 16:13:57,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 2254 flow [2023-11-17 16:13:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-17 16:13:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-11-17 16:13:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2716 transitions. [2023-11-17 16:13:57,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2023-11-17 16:13:57,065 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2716 transitions. [2023-11-17 16:13:57,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2716 transitions. [2023-11-17 16:13:57,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:57,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2716 transitions. [2023-11-17 16:13:57,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 66.2439024390244) internal successors, (2716), 41 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:57,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 168.0) internal successors, (7056), 42 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:57,078 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 168.0) internal successors, (7056), 42 states have internal predecessors, (7056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:57,078 INFO L175 Difference]: Start difference. First operand has 145 places, 148 transitions, 1168 flow. Second operand 41 states and 2716 transitions. [2023-11-17 16:13:57,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 2254 flow [2023-11-17 16:13:57,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 256 transitions, 2096 flow, removed 21 selfloop flow, removed 9 redundant places. [2023-11-17 16:13:57,095 INFO L231 Difference]: Finished difference. Result has 168 places, 143 transitions, 1239 flow [2023-11-17 16:13:57,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=1239, PETRI_PLACES=168, PETRI_TRANSITIONS=143} [2023-11-17 16:13:57,096 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 148 predicate places. [2023-11-17 16:13:57,096 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 143 transitions, 1239 flow [2023-11-17 16:13:57,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.875) internal successors, (1509), 24 states have internal predecessors, (1509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:57,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:57,097 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:57,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-17 16:13:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:57,302 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 16:13:57,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1047861101, now seen corresponding path program 12 times [2023-11-17 16:13:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:57,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326483383] [2023-11-17 16:13:57,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:57,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:57,423 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 16:13:57,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:57,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326483383] [2023-11-17 16:13:57,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326483383] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:57,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243815860] [2023-11-17 16:13:57,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:13:57,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:57,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:57,426 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:57,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-17 16:13:57,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:13:57,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:57,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:13:57,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:57,698 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 16:13:57,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:57,857 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 16:13:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243815860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:57,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:57,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:13:57,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445394269] [2023-11-17 16:13:57,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:57,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:13:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:57,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:13:57,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:13:57,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:57,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 143 transitions, 1239 flow. Second operand has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:57,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:57,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:57,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:58,566 INFO L124 PetriNetUnfolderBase]: 452/886 cut-off events. [2023-11-17 16:13:58,567 INFO L125 PetriNetUnfolderBase]: For 8830/8830 co-relation queries the response was YES. [2023-11-17 16:13:58,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4987 conditions, 886 events. 452/886 cut-off events. For 8830/8830 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4597 event pairs, 44 based on Foata normal form. 5/887 useless extension candidates. Maximal degree in co-relation 4943. Up to 476 conditions per place. [2023-11-17 16:13:58,572 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 92 selfloop transitions, 89 changer transitions 46/227 dead transitions. [2023-11-17 16:13:58,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 227 transitions, 2175 flow [2023-11-17 16:13:58,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-17 16:13:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-11-17 16:13:58,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2093 transitions. [2023-11-17 16:13:58,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893229166666667 [2023-11-17 16:13:58,575 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2093 transitions. [2023-11-17 16:13:58,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2093 transitions. [2023-11-17 16:13:58,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:58,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2093 transitions. [2023-11-17 16:13:58,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 65.40625) internal successors, (2093), 32 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:58,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 168.0) internal successors, (5544), 33 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:58,582 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 168.0) internal successors, (5544), 33 states have internal predecessors, (5544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:58,582 INFO L175 Difference]: Start difference. First operand has 168 places, 143 transitions, 1239 flow. Second operand 32 states and 2093 transitions. [2023-11-17 16:13:58,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 227 transitions, 2175 flow [2023-11-17 16:13:58,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 227 transitions, 1917 flow, removed 9 selfloop flow, removed 34 redundant places. [2023-11-17 16:13:58,596 INFO L231 Difference]: Finished difference. Result has 166 places, 145 transitions, 1288 flow [2023-11-17 16:13:58,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1288, PETRI_PLACES=166, PETRI_TRANSITIONS=145} [2023-11-17 16:13:58,596 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 146 predicate places. [2023-11-17 16:13:58,596 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 145 transitions, 1288 flow [2023-11-17 16:13:58,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:58,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:58,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:58,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:58,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-17 16:13:58,802 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 16:13:58,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:58,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1848553808, now seen corresponding path program 2 times [2023-11-17 16:13:58,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:58,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094198078] [2023-11-17 16:13:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:58,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:58,908 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 16:13:58,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:58,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094198078] [2023-11-17 16:13:58,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094198078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:58,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440209960] [2023-11-17 16:13:58,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:13:58,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:58,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:58,909 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:13:58,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-17 16:13:58,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:13:58,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:13:58,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:13:58,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:13:59,099 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 16:13:59,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:13:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:13:59,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440209960] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:13:59,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:13:59,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 16:13:59,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139264745] [2023-11-17 16:13:59,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:13:59,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:13:59,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:13:59,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:13:59,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:13:59,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:13:59,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 145 transitions, 1288 flow. Second operand has 20 states, 20 states have (on average 62.65) internal successors, (1253), 20 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:13:59,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:13:59,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:13:59,595 INFO L124 PetriNetUnfolderBase]: 576/1074 cut-off events. [2023-11-17 16:13:59,595 INFO L125 PetriNetUnfolderBase]: For 12139/12139 co-relation queries the response was YES. [2023-11-17 16:13:59,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6280 conditions, 1074 events. 576/1074 cut-off events. For 12139/12139 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 5608 event pairs, 34 based on Foata normal form. 9/1079 useless extension candidates. Maximal degree in co-relation 6232. Up to 587 conditions per place. [2023-11-17 16:13:59,602 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 126 selfloop transitions, 80 changer transitions 53/259 dead transitions. [2023-11-17 16:13:59,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 259 transitions, 2559 flow [2023-11-17 16:13:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:13:59,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:13:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1460 transitions. [2023-11-17 16:13:59,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.395021645021645 [2023-11-17 16:13:59,604 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1460 transitions. [2023-11-17 16:13:59,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1460 transitions. [2023-11-17 16:13:59,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:13:59,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1460 transitions. [2023-11-17 16:13:59,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 66.36363636363636) internal successors, (1460), 22 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,608 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,608 INFO L175 Difference]: Start difference. First operand has 166 places, 145 transitions, 1288 flow. Second operand 22 states and 1460 transitions. [2023-11-17 16:13:59,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 259 transitions, 2559 flow [2023-11-17 16:13:59,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 259 transitions, 2383 flow, removed 35 selfloop flow, removed 18 redundant places. [2023-11-17 16:13:59,628 INFO L231 Difference]: Finished difference. Result has 157 places, 168 transitions, 1594 flow [2023-11-17 16:13:59,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1594, PETRI_PLACES=157, PETRI_TRANSITIONS=168} [2023-11-17 16:13:59,628 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 137 predicate places. [2023-11-17 16:13:59,628 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 168 transitions, 1594 flow [2023-11-17 16:13:59,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.65) internal successors, (1253), 20 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:13:59,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:13:59,629 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:13:59,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-17 16:13:59,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:59,835 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 16:13:59,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:13:59,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1989770304, now seen corresponding path program 3 times [2023-11-17 16:13:59,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:13:59,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707189602] [2023-11-17 16:13:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:13:59,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:13:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:13:59,973 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 16:13:59,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:13:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707189602] [2023-11-17 16:13:59,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707189602] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:13:59,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537175620] [2023-11-17 16:13:59,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:13:59,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:13:59,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:13:59,975 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:00,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-17 16:14:00,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:14:00,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:00,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:14:00,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:00,184 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 16:14:00,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:00,290 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 16:14:00,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537175620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:00,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:00,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-11-17 16:14:00,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382046027] [2023-11-17 16:14:00,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:00,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:14:00,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:00,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:14:00,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:14:00,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:00,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 168 transitions, 1594 flow. Second operand has 22 states, 22 states have (on average 62.5) internal successors, (1375), 22 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:00,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:00,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:00,705 INFO L124 PetriNetUnfolderBase]: 526/1001 cut-off events. [2023-11-17 16:14:00,706 INFO L125 PetriNetUnfolderBase]: For 20697/20697 co-relation queries the response was YES. [2023-11-17 16:14:00,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6719 conditions, 1001 events. 526/1001 cut-off events. For 20697/20697 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5192 event pairs, 80 based on Foata normal form. 8/1009 useless extension candidates. Maximal degree in co-relation 6667. Up to 829 conditions per place. [2023-11-17 16:14:00,714 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 174 selfloop transitions, 44 changer transitions 10/228 dead transitions. [2023-11-17 16:14:00,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 228 transitions, 2472 flow [2023-11-17 16:14:00,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-17 16:14:00,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-17 16:14:00,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1377 transitions. [2023-11-17 16:14:00,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3903061224489796 [2023-11-17 16:14:00,715 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1377 transitions. [2023-11-17 16:14:00,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1377 transitions. [2023-11-17 16:14:00,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:00,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1377 transitions. [2023-11-17 16:14:00,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 65.57142857142857) internal successors, (1377), 21 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 168.0) internal successors, (3696), 22 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,719 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 168.0) internal successors, (3696), 22 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,719 INFO L175 Difference]: Start difference. First operand has 157 places, 168 transitions, 1594 flow. Second operand 21 states and 1377 transitions. [2023-11-17 16:14:00,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 228 transitions, 2472 flow [2023-11-17 16:14:00,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 228 transitions, 2280 flow, removed 57 selfloop flow, removed 10 redundant places. [2023-11-17 16:14:00,751 INFO L231 Difference]: Finished difference. Result has 165 places, 181 transitions, 1744 flow [2023-11-17 16:14:00,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1439, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1744, PETRI_PLACES=165, PETRI_TRANSITIONS=181} [2023-11-17 16:14:00,751 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 145 predicate places. [2023-11-17 16:14:00,751 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 181 transitions, 1744 flow [2023-11-17 16:14:00,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.5) internal successors, (1375), 22 states have internal predecessors, (1375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:00,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:00,752 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:00,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-17 16:14:00,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:00,957 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 16:14:00,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2017475934, now seen corresponding path program 4 times [2023-11-17 16:14:00,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:00,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090316328] [2023-11-17 16:14:00,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:00,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:00,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:01,064 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 16:14:01,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:01,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090316328] [2023-11-17 16:14:01,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090316328] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:01,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562731400] [2023-11-17 16:14:01,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:01,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:01,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:01,082 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:01,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-17 16:14:01,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:01,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:01,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:01,273 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 16:14:01,273 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:01,345 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 16:14:01,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562731400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:01,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:01,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 19 [2023-11-17 16:14:01,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474721317] [2023-11-17 16:14:01,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:01,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:14:01,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:01,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:14:01,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:14:01,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:01,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 181 transitions, 1744 flow. Second operand has 21 states, 21 states have (on average 62.57142857142857) internal successors, (1314), 21 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:01,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:01,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:01,923 INFO L124 PetriNetUnfolderBase]: 582/1165 cut-off events. [2023-11-17 16:14:01,923 INFO L125 PetriNetUnfolderBase]: For 20972/20972 co-relation queries the response was YES. [2023-11-17 16:14:01,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7068 conditions, 1165 events. 582/1165 cut-off events. For 20972/20972 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 6636 event pairs, 42 based on Foata normal form. 6/1171 useless extension candidates. Maximal degree in co-relation 7017. Up to 480 conditions per place. [2023-11-17 16:14:01,936 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 148 selfloop transitions, 148 changer transitions 25/321 dead transitions. [2023-11-17 16:14:01,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 321 transitions, 3385 flow [2023-11-17 16:14:01,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-17 16:14:01,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-17 16:14:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1965 transitions. [2023-11-17 16:14:01,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2023-11-17 16:14:01,938 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1965 transitions. [2023-11-17 16:14:01,938 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1965 transitions. [2023-11-17 16:14:01,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:01,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1965 transitions. [2023-11-17 16:14:01,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 65.5) internal successors, (1965), 30 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 168.0) internal successors, (5208), 31 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,961 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 168.0) internal successors, (5208), 31 states have internal predecessors, (5208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:01,961 INFO L175 Difference]: Start difference. First operand has 165 places, 181 transitions, 1744 flow. Second operand 30 states and 1965 transitions. [2023-11-17 16:14:01,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 321 transitions, 3385 flow [2023-11-17 16:14:02,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 321 transitions, 3226 flow, removed 58 selfloop flow, removed 8 redundant places. [2023-11-17 16:14:02,008 INFO L231 Difference]: Finished difference. Result has 188 places, 232 transitions, 2598 flow [2023-11-17 16:14:02,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2598, PETRI_PLACES=188, PETRI_TRANSITIONS=232} [2023-11-17 16:14:02,009 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 168 predicate places. [2023-11-17 16:14:02,009 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 232 transitions, 2598 flow [2023-11-17 16:14:02,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.57142857142857) internal successors, (1314), 21 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:02,009 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:02,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:02,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-17 16:14:02,214 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 16:14:02,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:02,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1908825840, now seen corresponding path program 5 times [2023-11-17 16:14:02,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:02,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130742177] [2023-11-17 16:14:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:02,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:02,340 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 16:14:02,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130742177] [2023-11-17 16:14:02,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130742177] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:02,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605573773] [2023-11-17 16:14:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:02,342 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-17 16:14:02,397 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:02,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:02,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:02,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:02,491 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 16:14:02,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:02,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:02,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605573773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:02,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:02,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 16:14:02,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778576293] [2023-11-17 16:14:02,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:02,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:14:02,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:02,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:14:02,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:14:02,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:02,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 232 transitions, 2598 flow. Second operand has 20 states, 20 states have (on average 62.6) internal successors, (1252), 20 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:02,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:02,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:02,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:03,032 INFO L124 PetriNetUnfolderBase]: 654/1269 cut-off events. [2023-11-17 16:14:03,032 INFO L125 PetriNetUnfolderBase]: For 24917/24917 co-relation queries the response was YES. [2023-11-17 16:14:03,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8319 conditions, 1269 events. 654/1269 cut-off events. For 24917/24917 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 7205 event pairs, 23 based on Foata normal form. 10/1279 useless extension candidates. Maximal degree in co-relation 8263. Up to 625 conditions per place. [2023-11-17 16:14:03,039 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 174 selfloop transitions, 92 changer transitions 60/326 dead transitions. [2023-11-17 16:14:03,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 326 transitions, 3956 flow [2023-11-17 16:14:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:14:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:14:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1448 transitions. [2023-11-17 16:14:03,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3917748917748918 [2023-11-17 16:14:03,054 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1448 transitions. [2023-11-17 16:14:03,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1448 transitions. [2023-11-17 16:14:03,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:03,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1448 transitions. [2023-11-17 16:14:03,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.81818181818181) internal successors, (1448), 22 states have internal predecessors, (1448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,058 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,058 INFO L175 Difference]: Start difference. First operand has 188 places, 232 transitions, 2598 flow. Second operand 22 states and 1448 transitions. [2023-11-17 16:14:03,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 326 transitions, 3956 flow [2023-11-17 16:14:03,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 326 transitions, 3257 flow, removed 274 selfloop flow, removed 20 redundant places. [2023-11-17 16:14:03,162 INFO L231 Difference]: Finished difference. Result has 196 places, 232 transitions, 2298 flow [2023-11-17 16:14:03,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2298, PETRI_PLACES=196, PETRI_TRANSITIONS=232} [2023-11-17 16:14:03,163 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 176 predicate places. [2023-11-17 16:14:03,163 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 232 transitions, 2298 flow [2023-11-17 16:14:03,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.6) internal successors, (1252), 20 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:03,164 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:03,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:03,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:03,368 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 16:14:03,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:03,369 INFO L85 PathProgramCache]: Analyzing trace with hash 329099079, now seen corresponding path program 13 times [2023-11-17 16:14:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:03,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077921339] [2023-11-17 16:14:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:03,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:03,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:03,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077921339] [2023-11-17 16:14:03,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077921339] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:03,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584211540] [2023-11-17 16:14:03,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:03,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:03,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:03,470 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:03,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-17 16:14:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:03,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:03,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:03,687 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 16:14:03,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:03,803 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 16:14:03,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584211540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:03,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:03,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:14:03,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926239457] [2023-11-17 16:14:03,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:03,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:14:03,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:03,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:14:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:14:03,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:03,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 232 transitions, 2298 flow. Second operand has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:03,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:03,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:03,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:04,126 INFO L124 PetriNetUnfolderBase]: 560/1110 cut-off events. [2023-11-17 16:14:04,127 INFO L125 PetriNetUnfolderBase]: For 6111/6111 co-relation queries the response was YES. [2023-11-17 16:14:04,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5935 conditions, 1110 events. 560/1110 cut-off events. For 6111/6111 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 6151 event pairs, 39 based on Foata normal form. 3/1113 useless extension candidates. Maximal degree in co-relation 5877. Up to 1046 conditions per place. [2023-11-17 16:14:04,134 INFO L140 encePairwiseOnDemand]: 161/168 looper letters, 224 selfloop transitions, 8 changer transitions 29/261 dead transitions. [2023-11-17 16:14:04,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 261 transitions, 2932 flow [2023-11-17 16:14:04,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-17 16:14:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-17 16:14:04,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 911 transitions. [2023-11-17 16:14:04,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38732993197278914 [2023-11-17 16:14:04,176 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 911 transitions. [2023-11-17 16:14:04,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 911 transitions. [2023-11-17 16:14:04,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:04,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 911 transitions. [2023-11-17 16:14:04,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.07142857142857) internal successors, (911), 14 states have internal predecessors, (911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,179 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,179 INFO L175 Difference]: Start difference. First operand has 196 places, 232 transitions, 2298 flow. Second operand 14 states and 911 transitions. [2023-11-17 16:14:04,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 261 transitions, 2932 flow [2023-11-17 16:14:04,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 261 transitions, 2716 flow, removed 27 selfloop flow, removed 25 redundant places. [2023-11-17 16:14:04,203 INFO L231 Difference]: Finished difference. Result has 174 places, 227 transitions, 2071 flow [2023-11-17 16:14:04,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2088, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2071, PETRI_PLACES=174, PETRI_TRANSITIONS=227} [2023-11-17 16:14:04,204 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 154 predicate places. [2023-11-17 16:14:04,204 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 227 transitions, 2071 flow [2023-11-17 16:14:04,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:04,205 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:04,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-17 16:14:04,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:04,409 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 16:14:04,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:04,409 INFO L85 PathProgramCache]: Analyzing trace with hash 833716023, now seen corresponding path program 14 times [2023-11-17 16:14:04,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:04,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098721611] [2023-11-17 16:14:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:04,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:04,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:04,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098721611] [2023-11-17 16:14:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098721611] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081323138] [2023-11-17 16:14:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:04,541 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-17 16:14:04,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-17 16:14:04,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:04,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:04,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:04,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:04,777 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 16:14:04,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:04,917 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 16:14:04,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081323138] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:04,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:04,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:14:04,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672307720] [2023-11-17 16:14:04,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:04,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:14:04,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:04,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:14:04,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:14:04,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:04,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 227 transitions, 2071 flow. Second operand has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:04,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:04,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:04,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:06,066 INFO L124 PetriNetUnfolderBase]: 647/1307 cut-off events. [2023-11-17 16:14:06,066 INFO L125 PetriNetUnfolderBase]: For 3606/3606 co-relation queries the response was YES. [2023-11-17 16:14:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6090 conditions, 1307 events. 647/1307 cut-off events. For 3606/3606 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7787 event pairs, 25 based on Foata normal form. 5/1308 useless extension candidates. Maximal degree in co-relation 6041. Up to 908 conditions per place. [2023-11-17 16:14:06,074 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 257 selfloop transitions, 90 changer transitions 24/371 dead transitions. [2023-11-17 16:14:06,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 371 transitions, 3698 flow [2023-11-17 16:14:06,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-17 16:14:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-11-17 16:14:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2422 transitions. [2023-11-17 16:14:06,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38963963963963966 [2023-11-17 16:14:06,077 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2422 transitions. [2023-11-17 16:14:06,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2422 transitions. [2023-11-17 16:14:06,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:06,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2422 transitions. [2023-11-17 16:14:06,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 65.45945945945945) internal successors, (2422), 37 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 168.0) internal successors, (6384), 38 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,084 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 168.0) internal successors, (6384), 38 states have internal predecessors, (6384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,084 INFO L175 Difference]: Start difference. First operand has 174 places, 227 transitions, 2071 flow. Second operand 37 states and 2422 transitions. [2023-11-17 16:14:06,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 371 transitions, 3698 flow [2023-11-17 16:14:06,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 371 transitions, 3598 flow, removed 40 selfloop flow, removed 13 redundant places. [2023-11-17 16:14:06,109 INFO L231 Difference]: Finished difference. Result has 197 places, 284 transitions, 2862 flow [2023-11-17 16:14:06,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2031, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2862, PETRI_PLACES=197, PETRI_TRANSITIONS=284} [2023-11-17 16:14:06,111 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 177 predicate places. [2023-11-17 16:14:06,111 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 284 transitions, 2862 flow [2023-11-17 16:14:06,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:06,111 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:06,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:06,316 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 16:14:06,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:06,316 INFO L85 PathProgramCache]: Analyzing trace with hash -122638706, now seen corresponding path program 6 times [2023-11-17 16:14:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:06,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047923310] [2023-11-17 16:14:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:06,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:06,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:06,422 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 16:14:06,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:06,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047923310] [2023-11-17 16:14:06,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047923310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:06,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824088038] [2023-11-17 16:14:06,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:06,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:06,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:06,438 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 16:14:06,451 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 16:14:06,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-17 16:14:06,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:06,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:14:06,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:06,594 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 16:14:06,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:06,707 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 16:14:06,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824088038] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:06,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:06,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-11-17 16:14:06,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095839591] [2023-11-17 16:14:06,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:06,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:14:06,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:06,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:14:06,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:14:06,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:06,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 284 transitions, 2862 flow. Second operand has 21 states, 21 states have (on average 62.61904761904762) internal successors, (1315), 21 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:06,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:06,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:06,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:07,301 INFO L124 PetriNetUnfolderBase]: 714/1443 cut-off events. [2023-11-17 16:14:07,302 INFO L125 PetriNetUnfolderBase]: For 5726/5726 co-relation queries the response was YES. [2023-11-17 16:14:07,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7425 conditions, 1443 events. 714/1443 cut-off events. For 5726/5726 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 8846 event pairs, 52 based on Foata normal form. 14/1453 useless extension candidates. Maximal degree in co-relation 7372. Up to 1240 conditions per place. [2023-11-17 16:14:07,309 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 312 selfloop transitions, 48 changer transitions 17/377 dead transitions. [2023-11-17 16:14:07,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 377 transitions, 4393 flow [2023-11-17 16:14:07,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-17 16:14:07,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-17 16:14:07,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1634 transitions. [2023-11-17 16:14:07,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38904761904761903 [2023-11-17 16:14:07,310 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1634 transitions. [2023-11-17 16:14:07,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1634 transitions. [2023-11-17 16:14:07,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:07,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1634 transitions. [2023-11-17 16:14:07,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 65.36) internal successors, (1634), 25 states have internal predecessors, (1634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,314 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 168.0) internal successors, (4368), 26 states have internal predecessors, (4368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,314 INFO L175 Difference]: Start difference. First operand has 197 places, 284 transitions, 2862 flow. Second operand 25 states and 1634 transitions. [2023-11-17 16:14:07,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 377 transitions, 4393 flow [2023-11-17 16:14:07,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 377 transitions, 3941 flow, removed 213 selfloop flow, removed 13 redundant places. [2023-11-17 16:14:07,348 INFO L231 Difference]: Finished difference. Result has 213 places, 321 transitions, 3164 flow [2023-11-17 16:14:07,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=3164, PETRI_PLACES=213, PETRI_TRANSITIONS=321} [2023-11-17 16:14:07,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 193 predicate places. [2023-11-17 16:14:07,349 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 321 transitions, 3164 flow [2023-11-17 16:14:07,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.61904761904762) internal successors, (1315), 21 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:07,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:07,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:07,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-17 16:14:07,554 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 16:14:07,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:07,554 INFO L85 PathProgramCache]: Analyzing trace with hash -98558394, now seen corresponding path program 7 times [2023-11-17 16:14:07,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:07,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423596513] [2023-11-17 16:14:07,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:07,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:07,648 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 16:14:07,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:07,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423596513] [2023-11-17 16:14:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423596513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:07,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044120056] [2023-11-17 16:14:07,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:07,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:07,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:07,649 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 16:14:07,700 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 16:14:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:07,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-17 16:14:07,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:07,850 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 16:14:07,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:07,938 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 16:14:07,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044120056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:07,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:07,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-11-17 16:14:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149714073] [2023-11-17 16:14:07,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:07,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 16:14:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:07,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 16:14:07,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-11-17 16:14:07,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:07,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 321 transitions, 3164 flow. Second operand has 23 states, 23 states have (on average 62.69565217391305) internal successors, (1442), 23 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:07,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:07,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:07,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:08,233 INFO L124 PetriNetUnfolderBase]: 719/1441 cut-off events. [2023-11-17 16:14:08,234 INFO L125 PetriNetUnfolderBase]: For 5354/5354 co-relation queries the response was YES. [2023-11-17 16:14:08,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7220 conditions, 1441 events. 719/1441 cut-off events. For 5354/5354 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 8730 event pairs, 54 based on Foata normal form. 3/1440 useless extension candidates. Maximal degree in co-relation 7163. Up to 1326 conditions per place. [2023-11-17 16:14:08,243 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 303 selfloop transitions, 28 changer transitions 28/359 dead transitions. [2023-11-17 16:14:08,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 359 transitions, 4209 flow [2023-11-17 16:14:08,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-17 16:14:08,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-17 16:14:08,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 979 transitions. [2023-11-17 16:14:08,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3884920634920635 [2023-11-17 16:14:08,244 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 979 transitions. [2023-11-17 16:14:08,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 979 transitions. [2023-11-17 16:14:08,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:08,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 979 transitions. [2023-11-17 16:14:08,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 65.26666666666667) internal successors, (979), 15 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 168.0) internal successors, (2688), 16 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,247 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 168.0) internal successors, (2688), 16 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,247 INFO L175 Difference]: Start difference. First operand has 213 places, 321 transitions, 3164 flow. Second operand 15 states and 979 transitions. [2023-11-17 16:14:08,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 359 transitions, 4209 flow [2023-11-17 16:14:08,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 359 transitions, 3879 flow, removed 156 selfloop flow, removed 6 redundant places. [2023-11-17 16:14:08,283 INFO L231 Difference]: Finished difference. Result has 224 places, 318 transitions, 3031 flow [2023-11-17 16:14:08,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2926, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3031, PETRI_PLACES=224, PETRI_TRANSITIONS=318} [2023-11-17 16:14:08,283 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 204 predicate places. [2023-11-17 16:14:08,284 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 318 transitions, 3031 flow [2023-11-17 16:14:08,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 62.69565217391305) internal successors, (1442), 23 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:08,284 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:08,288 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 16:14:08,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-17 16:14:08,489 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 16:14:08,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:08,489 INFO L85 PathProgramCache]: Analyzing trace with hash 871773367, now seen corresponding path program 15 times [2023-11-17 16:14:08,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:08,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119159229] [2023-11-17 16:14:08,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:08,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:08,594 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:08,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119159229] [2023-11-17 16:14:08,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119159229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:08,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940421775] [2023-11-17 16:14:08,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:08,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:08,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:08,609 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 16:14:08,610 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 16:14:08,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:14:08,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:08,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:08,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:08,815 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 16:14:08,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:08,954 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 16:14:08,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940421775] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:08,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:08,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:14:08,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124432440] [2023-11-17 16:14:08,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:08,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:14:08,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:08,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:14:08,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:14:08,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:08,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 318 transitions, 3031 flow. Second operand has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:08,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:08,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:08,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:09,424 INFO L124 PetriNetUnfolderBase]: 692/1388 cut-off events. [2023-11-17 16:14:09,424 INFO L125 PetriNetUnfolderBase]: For 4517/4517 co-relation queries the response was YES. [2023-11-17 16:14:09,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6691 conditions, 1388 events. 692/1388 cut-off events. For 4517/4517 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8337 event pairs, 53 based on Foata normal form. 7/1391 useless extension candidates. Maximal degree in co-relation 6628. Up to 1157 conditions per place. [2023-11-17 16:14:09,432 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 267 selfloop transitions, 29 changer transitions 58/354 dead transitions. [2023-11-17 16:14:09,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 354 transitions, 3866 flow [2023-11-17 16:14:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-17 16:14:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-11-17 16:14:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1302 transitions. [2023-11-17 16:14:09,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2023-11-17 16:14:09,434 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1302 transitions. [2023-11-17 16:14:09,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1302 transitions. [2023-11-17 16:14:09,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:09,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1302 transitions. [2023-11-17 16:14:09,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 65.1) internal successors, (1302), 20 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,437 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,437 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 168.0) internal successors, (3528), 21 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,437 INFO L175 Difference]: Start difference. First operand has 224 places, 318 transitions, 3031 flow. Second operand 20 states and 1302 transitions. [2023-11-17 16:14:09,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 354 transitions, 3866 flow [2023-11-17 16:14:09,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 354 transitions, 3734 flow, removed 35 selfloop flow, removed 15 redundant places. [2023-11-17 16:14:09,471 INFO L231 Difference]: Finished difference. Result has 222 places, 280 transitions, 2574 flow [2023-11-17 16:14:09,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2574, PETRI_PLACES=222, PETRI_TRANSITIONS=280} [2023-11-17 16:14:09,473 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-11-17 16:14:09,473 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 280 transitions, 2574 flow [2023-11-17 16:14:09,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.833333333333336) internal successors, (1508), 24 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:09,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:09,474 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:09,480 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 16:14:09,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-17 16:14:09,678 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 16:14:09,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:09,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1586442872, now seen corresponding path program 8 times [2023-11-17 16:14:09,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:09,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185765565] [2023-11-17 16:14:09,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:09,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:09,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:09,779 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 16:14:09,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185765565] [2023-11-17 16:14:09,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185765565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:09,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477634759] [2023-11-17 16:14:09,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:09,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:09,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:09,806 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 16:14:09,841 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 16:14:09,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:09,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:09,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:09,998 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 16:14:09,998 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:10,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477634759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:10,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:10,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 16:14:10,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567587460] [2023-11-17 16:14:10,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:10,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:14:10,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:10,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:14:10,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:14:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:10,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 280 transitions, 2574 flow. Second operand has 20 states, 20 states have (on average 62.65) internal successors, (1253), 20 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:10,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:10,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:10,462 INFO L124 PetriNetUnfolderBase]: 647/1270 cut-off events. [2023-11-17 16:14:10,463 INFO L125 PetriNetUnfolderBase]: For 4631/4631 co-relation queries the response was YES. [2023-11-17 16:14:10,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6099 conditions, 1270 events. 647/1270 cut-off events. For 4631/4631 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 7344 event pairs, 15 based on Foata normal form. 10/1276 useless extension candidates. Maximal degree in co-relation 6043. Up to 945 conditions per place. [2023-11-17 16:14:10,470 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 250 selfloop transitions, 40 changer transitions 52/342 dead transitions. [2023-11-17 16:14:10,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 342 transitions, 3649 flow [2023-11-17 16:14:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:14:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:14:10,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1246 transitions. [2023-11-17 16:14:10,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035087719298245 [2023-11-17 16:14:10,471 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1246 transitions. [2023-11-17 16:14:10,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1246 transitions. [2023-11-17 16:14:10,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:10,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1246 transitions. [2023-11-17 16:14:10,473 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.57894736842105) internal successors, (1246), 19 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,474 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 168.0) internal successors, (3360), 20 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,474 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 168.0) internal successors, (3360), 20 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,474 INFO L175 Difference]: Start difference. First operand has 222 places, 280 transitions, 2574 flow. Second operand 19 states and 1246 transitions. [2023-11-17 16:14:10,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 342 transitions, 3649 flow [2023-11-17 16:14:10,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 342 transitions, 3500 flow, removed 41 selfloop flow, removed 12 redundant places. [2023-11-17 16:14:10,501 INFO L231 Difference]: Finished difference. Result has 216 places, 267 transitions, 2485 flow [2023-11-17 16:14:10,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2451, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2485, PETRI_PLACES=216, PETRI_TRANSITIONS=267} [2023-11-17 16:14:10,502 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-11-17 16:14:10,502 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 267 transitions, 2485 flow [2023-11-17 16:14:10,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.65) internal successors, (1253), 20 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:10,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:10,502 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:10,520 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 16:14:10,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:10,708 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 16:14:10,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:10,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1851686040, now seen corresponding path program 9 times [2023-11-17 16:14:10,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:10,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207801960] [2023-11-17 16:14:10,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:10,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:10,807 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 16:14:10,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:10,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207801960] [2023-11-17 16:14:10,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207801960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300171627] [2023-11-17 16:14:10,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:10,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:10,810 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 16:14:10,812 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 16:14:10,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-17 16:14:10,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:10,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:10,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:10,946 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 16:14:10,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:11,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:11,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300171627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:11,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:11,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2023-11-17 16:14:11,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672032697] [2023-11-17 16:14:11,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:11,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:14:11,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:11,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:14:11,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:14:11,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:11,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 267 transitions, 2485 flow. Second operand has 20 states, 20 states have (on average 62.7) internal successors, (1254), 20 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:11,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:11,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:11,387 INFO L124 PetriNetUnfolderBase]: 576/1180 cut-off events. [2023-11-17 16:14:11,387 INFO L125 PetriNetUnfolderBase]: For 4812/4812 co-relation queries the response was YES. [2023-11-17 16:14:11,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5741 conditions, 1180 events. 576/1180 cut-off events. For 4812/4812 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6968 event pairs, 15 based on Foata normal form. 9/1185 useless extension candidates. Maximal degree in co-relation 5680. Up to 856 conditions per place. [2023-11-17 16:14:11,395 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 249 selfloop transitions, 51 changer transitions 34/334 dead transitions. [2023-11-17 16:14:11,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 334 transitions, 3550 flow [2023-11-17 16:14:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:14:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:14:11,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1439 transitions. [2023-11-17 16:14:11,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3893398268398268 [2023-11-17 16:14:11,396 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1439 transitions. [2023-11-17 16:14:11,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1439 transitions. [2023-11-17 16:14:11,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:11,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1439 transitions. [2023-11-17 16:14:11,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.4090909090909) internal successors, (1439), 22 states have internal predecessors, (1439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,418 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,419 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,419 INFO L175 Difference]: Start difference. First operand has 216 places, 267 transitions, 2485 flow. Second operand 22 states and 1439 transitions. [2023-11-17 16:14:11,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 334 transitions, 3550 flow [2023-11-17 16:14:11,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 334 transitions, 3333 flow, removed 58 selfloop flow, removed 20 redundant places. [2023-11-17 16:14:11,447 INFO L231 Difference]: Finished difference. Result has 211 places, 270 transitions, 2538 flow [2023-11-17 16:14:11,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2538, PETRI_PLACES=211, PETRI_TRANSITIONS=270} [2023-11-17 16:14:11,448 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 191 predicate places. [2023-11-17 16:14:11,448 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 270 transitions, 2538 flow [2023-11-17 16:14:11,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.7) internal successors, (1254), 20 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:11,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:11,449 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:11,457 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 16:14:11,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:11,654 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 16:14:11,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:11,654 INFO L85 PathProgramCache]: Analyzing trace with hash 810825003, now seen corresponding path program 16 times [2023-11-17 16:14:11,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:11,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850908311] [2023-11-17 16:14:11,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:11,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:11,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:11,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:11,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850908311] [2023-11-17 16:14:11,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850908311] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:11,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461564360] [2023-11-17 16:14:11,753 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:11,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:11,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:11,754 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 16:14:11,778 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 16:14:11,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:11,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:11,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-17 16:14:11,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:11,975 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 16:14:11,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:12,152 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 16:14:12,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461564360] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:12,153 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:12,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2023-11-17 16:14:12,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392555103] [2023-11-17 16:14:12,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:12,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:14:12,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:12,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:14:12,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:14:12,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:12,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 270 transitions, 2538 flow. Second operand has 24 states, 24 states have (on average 62.916666666666664) internal successors, (1510), 24 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:12,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:12,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:12,703 INFO L124 PetriNetUnfolderBase]: 544/1082 cut-off events. [2023-11-17 16:14:12,703 INFO L125 PetriNetUnfolderBase]: For 3354/3354 co-relation queries the response was YES. [2023-11-17 16:14:12,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5199 conditions, 1082 events. 544/1082 cut-off events. For 3354/3354 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6017 event pairs, 15 based on Foata normal form. 3/1081 useless extension candidates. Maximal degree in co-relation 5141. Up to 913 conditions per place. [2023-11-17 16:14:12,709 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 243 selfloop transitions, 46 changer transitions 27/316 dead transitions. [2023-11-17 16:14:12,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 316 transitions, 3327 flow [2023-11-17 16:14:12,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:14:12,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:14:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1569 transitions. [2023-11-17 16:14:12,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38913690476190477 [2023-11-17 16:14:12,712 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1569 transitions. [2023-11-17 16:14:12,712 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1569 transitions. [2023-11-17 16:14:12,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:12,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1569 transitions. [2023-11-17 16:14:12,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.375) internal successors, (1569), 24 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 168.0) internal successors, (4200), 25 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,716 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 168.0) internal successors, (4200), 25 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,716 INFO L175 Difference]: Start difference. First operand has 211 places, 270 transitions, 2538 flow. Second operand 24 states and 1569 transitions. [2023-11-17 16:14:12,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 316 transitions, 3327 flow [2023-11-17 16:14:12,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 316 transitions, 3174 flow, removed 58 selfloop flow, removed 12 redundant places. [2023-11-17 16:14:12,742 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 2468 flow [2023-11-17 16:14:12,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2468, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2023-11-17 16:14:12,744 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-17 16:14:12,744 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 2468 flow [2023-11-17 16:14:12,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.916666666666664) internal successors, (1510), 24 states have internal predecessors, (1510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:12,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:12,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:12,763 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 16:14:12,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-17 16:14:12,951 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 16:14:12,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:12,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1267857646, now seen corresponding path program 10 times [2023-11-17 16:14:12,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:12,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346806486] [2023-11-17 16:14:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:12,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:13,091 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 16:14:13,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346806486] [2023-11-17 16:14:13,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346806486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:13,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102279433] [2023-11-17 16:14:13,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:13,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:13,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:13,109 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 16:14:13,110 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 16:14:13,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:13,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:13,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:14:13,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:13,324 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 16:14:13,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:14:13,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102279433] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:13,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:13,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 23 [2023-11-17 16:14:13,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603707716] [2023-11-17 16:14:13,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:13,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-17 16:14:13,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:13,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-17 16:14:13,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2023-11-17 16:14:13,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:13,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 2468 flow. Second operand has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:13,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:13,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:13,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:13,931 INFO L124 PetriNetUnfolderBase]: 556/1148 cut-off events. [2023-11-17 16:14:13,931 INFO L125 PetriNetUnfolderBase]: For 3167/3167 co-relation queries the response was YES. [2023-11-17 16:14:13,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5380 conditions, 1148 events. 556/1148 cut-off events. For 3167/3167 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 6750 event pairs, 15 based on Foata normal form. 9/1153 useless extension candidates. Maximal degree in co-relation 5324. Up to 741 conditions per place. [2023-11-17 16:14:13,937 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 222 selfloop transitions, 105 changer transitions 25/352 dead transitions. [2023-11-17 16:14:13,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 352 transitions, 3640 flow [2023-11-17 16:14:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:14:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:14:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1697 transitions. [2023-11-17 16:14:13,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.388507326007326 [2023-11-17 16:14:13,939 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1697 transitions. [2023-11-17 16:14:13,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1697 transitions. [2023-11-17 16:14:13,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:13,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1697 transitions. [2023-11-17 16:14:13,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.26923076923077) internal successors, (1697), 26 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:13,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:13,943 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:13,943 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 2468 flow. Second operand 26 states and 1697 transitions. [2023-11-17 16:14:13,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 352 transitions, 3640 flow [2023-11-17 16:14:13,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 352 transitions, 3525 flow, removed 17 selfloop flow, removed 15 redundant places. [2023-11-17 16:14:13,968 INFO L231 Difference]: Finished difference. Result has 216 places, 283 transitions, 2816 flow [2023-11-17 16:14:13,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2359, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2816, PETRI_PLACES=216, PETRI_TRANSITIONS=283} [2023-11-17 16:14:13,969 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 196 predicate places. [2023-11-17 16:14:13,969 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 283 transitions, 2816 flow [2023-11-17 16:14:13,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 62.76) internal successors, (1569), 25 states have internal predecessors, (1569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:13,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:13,969 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:13,991 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 16:14:14,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-17 16:14:14,174 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 16:14:14,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:14,174 INFO L85 PathProgramCache]: Analyzing trace with hash -905876450, now seen corresponding path program 11 times [2023-11-17 16:14:14,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:14,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829283193] [2023-11-17 16:14:14,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:14,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:14,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:14,296 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 16:14:14,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:14,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829283193] [2023-11-17 16:14:14,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829283193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:14,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675914091] [2023-11-17 16:14:14,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:14,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:14,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:14,297 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 16:14:14,322 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 16:14:14,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-17 16:14:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:14,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:14:14,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:14,502 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 16:14:14,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:14,673 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 16:14:14,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675914091] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:14,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:14,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-11-17 16:14:14,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408803923] [2023-11-17 16:14:14,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:14,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-17 16:14:14,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:14,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-17 16:14:14,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2023-11-17 16:14:14,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:14,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 283 transitions, 2816 flow. Second operand has 27 states, 27 states have (on average 62.55555555555556) internal successors, (1689), 27 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:14,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:14,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:14,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:15,323 INFO L124 PetriNetUnfolderBase]: 554/1145 cut-off events. [2023-11-17 16:14:15,323 INFO L125 PetriNetUnfolderBase]: For 3717/3717 co-relation queries the response was YES. [2023-11-17 16:14:15,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5755 conditions, 1145 events. 554/1145 cut-off events. For 3717/3717 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6704 event pairs, 7 based on Foata normal form. 2/1141 useless extension candidates. Maximal degree in co-relation 5690. Up to 855 conditions per place. [2023-11-17 16:14:15,332 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 255 selfloop transitions, 95 changer transitions 10/360 dead transitions. [2023-11-17 16:14:15,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 360 transitions, 3943 flow [2023-11-17 16:14:15,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:14:15,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:14:15,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1709 transitions. [2023-11-17 16:14:15,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39125457875457875 [2023-11-17 16:14:15,334 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1709 transitions. [2023-11-17 16:14:15,334 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1709 transitions. [2023-11-17 16:14:15,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:15,334 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1709 transitions. [2023-11-17 16:14:15,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.73076923076923) internal successors, (1709), 26 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,338 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,338 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,338 INFO L175 Difference]: Start difference. First operand has 216 places, 283 transitions, 2816 flow. Second operand 26 states and 1709 transitions. [2023-11-17 16:14:15,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 360 transitions, 3943 flow [2023-11-17 16:14:15,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 360 transitions, 3852 flow, removed 24 selfloop flow, removed 12 redundant places. [2023-11-17 16:14:15,368 INFO L231 Difference]: Finished difference. Result has 230 places, 300 transitions, 3141 flow [2023-11-17 16:14:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2737, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3141, PETRI_PLACES=230, PETRI_TRANSITIONS=300} [2023-11-17 16:14:15,368 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 210 predicate places. [2023-11-17 16:14:15,368 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 300 transitions, 3141 flow [2023-11-17 16:14:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 62.55555555555556) internal successors, (1689), 27 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:15,369 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:15,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:15,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:15,574 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 16:14:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1784340223, now seen corresponding path program 12 times [2023-11-17 16:14:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:15,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972535934] [2023-11-17 16:14:15,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:15,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:15,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972535934] [2023-11-17 16:14:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972535934] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26126900] [2023-11-17 16:14:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:15,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:15,690 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 16:14:15,692 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 16:14:15,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:14:15,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:15,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:14:15,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:15,877 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:15,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26126900] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:15,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2023-11-17 16:14:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850211263] [2023-11-17 16:14:15,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:14:15,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:14:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:14:15,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:15,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 300 transitions, 3141 flow. Second operand has 21 states, 21 states have (on average 62.61904761904762) internal successors, (1315), 21 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:15,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:15,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:15,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:16,484 INFO L124 PetriNetUnfolderBase]: 549/1121 cut-off events. [2023-11-17 16:14:16,484 INFO L125 PetriNetUnfolderBase]: For 4281/4281 co-relation queries the response was YES. [2023-11-17 16:14:16,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5876 conditions, 1121 events. 549/1121 cut-off events. For 4281/4281 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6458 event pairs, 6 based on Foata normal form. 9/1128 useless extension candidates. Maximal degree in co-relation 5810. Up to 350 conditions per place. [2023-11-17 16:14:16,489 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 174 selfloop transitions, 153 changer transitions 30/357 dead transitions. [2023-11-17 16:14:16,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 357 transitions, 4087 flow [2023-11-17 16:14:16,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:14:16,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:14:16,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1700 transitions. [2023-11-17 16:14:16,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891941391941392 [2023-11-17 16:14:16,493 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1700 transitions. [2023-11-17 16:14:16,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1700 transitions. [2023-11-17 16:14:16,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:16,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1700 transitions. [2023-11-17 16:14:16,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 65.38461538461539) internal successors, (1700), 26 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:16,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:16,496 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:16,496 INFO L175 Difference]: Start difference. First operand has 230 places, 300 transitions, 3141 flow. Second operand 26 states and 1700 transitions. [2023-11-17 16:14:16,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 357 transitions, 4087 flow [2023-11-17 16:14:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 357 transitions, 3944 flow, removed 40 selfloop flow, removed 15 redundant places. [2023-11-17 16:14:16,527 INFO L231 Difference]: Finished difference. Result has 237 places, 283 transitions, 3144 flow [2023-11-17 16:14:16,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=3144, PETRI_PLACES=237, PETRI_TRANSITIONS=283} [2023-11-17 16:14:16,527 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 217 predicate places. [2023-11-17 16:14:16,527 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 283 transitions, 3144 flow [2023-11-17 16:14:16,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.61904761904762) internal successors, (1315), 21 states have internal predecessors, (1315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:16,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:16,528 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:16,534 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 16:14:16,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:16,732 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 16:14:16,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:16,732 INFO L85 PathProgramCache]: Analyzing trace with hash -2102979223, now seen corresponding path program 13 times [2023-11-17 16:14:16,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:16,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538279965] [2023-11-17 16:14:16,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:16,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:16,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538279965] [2023-11-17 16:14:16,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538279965] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:16,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683356046] [2023-11-17 16:14:16,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:16,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:16,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:16,828 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 16:14:16,830 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 16:14:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:16,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-17 16:14:16,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:16,995 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:16,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:17,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683356046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:17,054 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:17,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2023-11-17 16:14:17,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771490674] [2023-11-17 16:14:17,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:17,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:14:17,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:17,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:14:17,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:14:17,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:17,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 283 transitions, 3144 flow. Second operand has 22 states, 22 states have (on average 62.63636363636363) internal successors, (1378), 22 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:17,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:17,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:17,304 INFO L124 PetriNetUnfolderBase]: 508/1018 cut-off events. [2023-11-17 16:14:17,304 INFO L125 PetriNetUnfolderBase]: For 4197/4197 co-relation queries the response was YES. [2023-11-17 16:14:17,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5688 conditions, 1018 events. 508/1018 cut-off events. For 4197/4197 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5566 event pairs, 9 based on Foata normal form. 3/1019 useless extension candidates. Maximal degree in co-relation 5622. Up to 907 conditions per place. [2023-11-17 16:14:17,309 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 264 selfloop transitions, 23 changer transitions 28/315 dead transitions. [2023-11-17 16:14:17,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 315 transitions, 3888 flow [2023-11-17 16:14:17,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:14:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:14:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1170 transitions. [2023-11-17 16:14:17,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2023-11-17 16:14:17,312 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1170 transitions. [2023-11-17 16:14:17,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1170 transitions. [2023-11-17 16:14:17,312 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:17,312 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1170 transitions. [2023-11-17 16:14:17,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.0) internal successors, (1170), 18 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,329 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,329 INFO L175 Difference]: Start difference. First operand has 237 places, 283 transitions, 3144 flow. Second operand 18 states and 1170 transitions. [2023-11-17 16:14:17,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 315 transitions, 3888 flow [2023-11-17 16:14:17,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 315 transitions, 3644 flow, removed 35 selfloop flow, removed 16 redundant places. [2023-11-17 16:14:17,370 INFO L231 Difference]: Finished difference. Result has 231 places, 271 transitions, 2815 flow [2023-11-17 16:14:17,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2890, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2815, PETRI_PLACES=231, PETRI_TRANSITIONS=271} [2023-11-17 16:14:17,371 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 211 predicate places. [2023-11-17 16:14:17,371 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 271 transitions, 2815 flow [2023-11-17 16:14:17,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.63636363636363) internal successors, (1378), 22 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:17,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:17,371 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:17,375 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 16:14:17,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:17,576 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 16:14:17,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:17,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1392822916, now seen corresponding path program 14 times [2023-11-17 16:14:17,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:17,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89815500] [2023-11-17 16:14:17,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:17,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:17,707 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 16:14:17,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89815500] [2023-11-17 16:14:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89815500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986717773] [2023-11-17 16:14:17,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:17,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:17,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:17,709 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 16:14:17,712 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 16:14:17,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:17,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:17,774 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:14:17,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:17,895 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 16:14:17,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:18,050 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 16:14:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986717773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:18,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:18,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 16:14:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457361509] [2023-11-17 16:14:18,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:18,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:14:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:14:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:14:18,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:18,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 271 transitions, 2815 flow. Second operand has 24 states, 24 states have (on average 62.458333333333336) internal successors, (1499), 24 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:18,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:18,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:18,513 INFO L124 PetriNetUnfolderBase]: 531/1057 cut-off events. [2023-11-17 16:14:18,513 INFO L125 PetriNetUnfolderBase]: For 4309/4309 co-relation queries the response was YES. [2023-11-17 16:14:18,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5644 conditions, 1057 events. 531/1057 cut-off events. For 4309/4309 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5773 event pairs, 5 based on Foata normal form. 3/1058 useless extension candidates. Maximal degree in co-relation 5580. Up to 918 conditions per place. [2023-11-17 16:14:18,519 INFO L140 encePairwiseOnDemand]: 159/168 looper letters, 277 selfloop transitions, 51 changer transitions 9/337 dead transitions. [2023-11-17 16:14:18,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 337 transitions, 3958 flow [2023-11-17 16:14:18,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:14:18,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:14:18,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1246 transitions. [2023-11-17 16:14:18,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035087719298245 [2023-11-17 16:14:18,521 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1246 transitions. [2023-11-17 16:14:18,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1246 transitions. [2023-11-17 16:14:18,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:18,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1246 transitions. [2023-11-17 16:14:18,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.57894736842105) internal successors, (1246), 19 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,523 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 168.0) internal successors, (3360), 20 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,523 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 168.0) internal successors, (3360), 20 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,524 INFO L175 Difference]: Start difference. First operand has 231 places, 271 transitions, 2815 flow. Second operand 19 states and 1246 transitions. [2023-11-17 16:14:18,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 337 transitions, 3958 flow [2023-11-17 16:14:18,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 337 transitions, 3794 flow, removed 15 selfloop flow, removed 18 redundant places. [2023-11-17 16:14:18,551 INFO L231 Difference]: Finished difference. Result has 223 places, 298 transitions, 3175 flow [2023-11-17 16:14:18,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3175, PETRI_PLACES=223, PETRI_TRANSITIONS=298} [2023-11-17 16:14:18,552 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 203 predicate places. [2023-11-17 16:14:18,552 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 298 transitions, 3175 flow [2023-11-17 16:14:18,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.458333333333336) internal successors, (1499), 24 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:18,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:18,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:18,558 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 16:14:18,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-17 16:14:18,753 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 16:14:18,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1420528546, now seen corresponding path program 15 times [2023-11-17 16:14:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:18,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644798558] [2023-11-17 16:14:18,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:18,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:18,872 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 16:14:18,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644798558] [2023-11-17 16:14:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644798558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492805889] [2023-11-17 16:14:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:18,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:18,874 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 16:14:18,876 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 16:14:18,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:14:18,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:18,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-17 16:14:18,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:19,059 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 16:14:19,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:19,196 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 16:14:19,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492805889] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:19,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:19,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-11-17 16:14:19,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226782215] [2023-11-17 16:14:19,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:19,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-17 16:14:19,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:19,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-17 16:14:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2023-11-17 16:14:19,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:19,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 298 transitions, 3175 flow. Second operand has 24 states, 24 states have (on average 62.458333333333336) internal successors, (1499), 24 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:19,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:19,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:19,580 INFO L124 PetriNetUnfolderBase]: 527/1043 cut-off events. [2023-11-17 16:14:19,580 INFO L125 PetriNetUnfolderBase]: For 4420/4420 co-relation queries the response was YES. [2023-11-17 16:14:19,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5635 conditions, 1043 events. 527/1043 cut-off events. For 4420/4420 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5644 event pairs, 5 based on Foata normal form. 1/1044 useless extension candidates. Maximal degree in co-relation 5570. Up to 918 conditions per place. [2023-11-17 16:14:19,586 INFO L140 encePairwiseOnDemand]: 159/168 looper letters, 273 selfloop transitions, 50 changer transitions 5/328 dead transitions. [2023-11-17 16:14:19,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 328 transitions, 3919 flow [2023-11-17 16:14:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:14:19,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:14:19,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1176 transitions. [2023-11-17 16:14:19,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-11-17 16:14:19,587 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1176 transitions. [2023-11-17 16:14:19,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1176 transitions. [2023-11-17 16:14:19,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:19,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1176 transitions. [2023-11-17 16:14:19,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 65.33333333333333) internal successors, (1176), 18 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,590 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,590 INFO L175 Difference]: Start difference. First operand has 223 places, 298 transitions, 3175 flow. Second operand 18 states and 1176 transitions. [2023-11-17 16:14:19,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 328 transitions, 3919 flow [2023-11-17 16:14:19,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 328 transitions, 3647 flow, removed 75 selfloop flow, removed 11 redundant places. [2023-11-17 16:14:19,616 INFO L231 Difference]: Finished difference. Result has 228 places, 297 transitions, 2993 flow [2023-11-17 16:14:19,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2993, PETRI_PLACES=228, PETRI_TRANSITIONS=297} [2023-11-17 16:14:19,616 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 208 predicate places. [2023-11-17 16:14:19,616 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 297 transitions, 2993 flow [2023-11-17 16:14:19,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 62.458333333333336) internal successors, (1499), 24 states have internal predecessors, (1499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:19,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:19,616 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:19,621 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 16:14:19,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-17 16:14:19,821 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 16:14:19,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -887954272, now seen corresponding path program 16 times [2023-11-17 16:14:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:19,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919250735] [2023-11-17 16:14:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:19,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:19,947 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 16:14:19,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919250735] [2023-11-17 16:14:19,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919250735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:19,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863666242] [2023-11-17 16:14:19,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 16:14:19,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:19,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:19,949 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 16:14:19,986 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 16:14:20,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 16:14:20,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:20,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:14:20,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:20,135 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 16:14:20,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-17 16:14:20,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863666242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:20,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:20,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 20 [2023-11-17 16:14:20,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803673241] [2023-11-17 16:14:20,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:20,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:14:20,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:20,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:14:20,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:14:20,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:20,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 297 transitions, 2993 flow. Second operand has 22 states, 22 states have (on average 62.63636363636363) internal successors, (1378), 22 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:20,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:20,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:20,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:20,634 INFO L124 PetriNetUnfolderBase]: 546/1073 cut-off events. [2023-11-17 16:14:20,634 INFO L125 PetriNetUnfolderBase]: For 4140/4140 co-relation queries the response was YES. [2023-11-17 16:14:20,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5681 conditions, 1073 events. 546/1073 cut-off events. For 4140/4140 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 5804 event pairs, 7 based on Foata normal form. 12/1083 useless extension candidates. Maximal degree in co-relation 5615. Up to 826 conditions per place. [2023-11-17 16:14:20,640 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 264 selfloop transitions, 55 changer transitions 23/342 dead transitions. [2023-11-17 16:14:20,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 342 transitions, 3976 flow [2023-11-17 16:14:20,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-17 16:14:20,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-17 16:14:20,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1236 transitions. [2023-11-17 16:14:20,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38721804511278196 [2023-11-17 16:14:20,642 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1236 transitions. [2023-11-17 16:14:20,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1236 transitions. [2023-11-17 16:14:20,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:20,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1236 transitions. [2023-11-17 16:14:20,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 65.05263157894737) internal successors, (1236), 19 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:20,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 168.0) internal successors, (3360), 20 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:20,646 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 168.0) internal successors, (3360), 20 states have internal predecessors, (3360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:20,646 INFO L175 Difference]: Start difference. First operand has 228 places, 297 transitions, 2993 flow. Second operand 19 states and 1236 transitions. [2023-11-17 16:14:20,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 342 transitions, 3976 flow [2023-11-17 16:14:20,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 342 transitions, 3865 flow, removed 3 selfloop flow, removed 17 redundant places. [2023-11-17 16:14:20,675 INFO L231 Difference]: Finished difference. Result has 230 places, 299 transitions, 3086 flow [2023-11-17 16:14:20,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2874, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3086, PETRI_PLACES=230, PETRI_TRANSITIONS=299} [2023-11-17 16:14:20,676 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 210 predicate places. [2023-11-17 16:14:20,676 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 299 transitions, 3086 flow [2023-11-17 16:14:20,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.63636363636363) internal successors, (1378), 22 states have internal predecessors, (1378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:20,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:20,677 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:20,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:20,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-17 16:14:20,883 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 16:14:20,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -548838185, now seen corresponding path program 17 times [2023-11-17 16:14:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:20,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521277178] [2023-11-17 16:14:20,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:20,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:21,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:21,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521277178] [2023-11-17 16:14:21,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521277178] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:21,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773317540] [2023-11-17 16:14:21,003 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 16:14:21,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:21,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:21,004 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 16:14:21,029 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 16:14:21,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-17 16:14:21,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:21,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-17 16:14:21,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:21,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:21,272 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:21,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773317540] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:21,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:21,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 18 [2023-11-17 16:14:21,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219417880] [2023-11-17 16:14:21,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:21,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-17 16:14:21,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:21,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-17 16:14:21,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2023-11-17 16:14:21,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:21,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 299 transitions, 3086 flow. Second operand has 20 states, 20 states have (on average 62.7) internal successors, (1254), 20 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:21,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:21,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:21,585 INFO L124 PetriNetUnfolderBase]: 533/1026 cut-off events. [2023-11-17 16:14:21,585 INFO L125 PetriNetUnfolderBase]: For 4407/4407 co-relation queries the response was YES. [2023-11-17 16:14:21,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5549 conditions, 1026 events. 533/1026 cut-off events. For 4407/4407 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 5391 event pairs, 7 based on Foata normal form. 4/1026 useless extension candidates. Maximal degree in co-relation 5479. Up to 767 conditions per place. [2023-11-17 16:14:21,591 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 216 selfloop transitions, 4 changer transitions 107/327 dead transitions. [2023-11-17 16:14:21,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 327 transitions, 3852 flow [2023-11-17 16:14:21,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-17 16:14:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-17 16:14:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1165 transitions. [2023-11-17 16:14:21,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38525132275132273 [2023-11-17 16:14:21,592 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1165 transitions. [2023-11-17 16:14:21,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1165 transitions. [2023-11-17 16:14:21,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:21,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1165 transitions. [2023-11-17 16:14:21,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 64.72222222222223) internal successors, (1165), 18 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,595 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,596 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 168.0) internal successors, (3192), 19 states have internal predecessors, (3192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,596 INFO L175 Difference]: Start difference. First operand has 230 places, 299 transitions, 3086 flow. Second operand 18 states and 1165 transitions. [2023-11-17 16:14:21,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 327 transitions, 3852 flow [2023-11-17 16:14:21,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 327 transitions, 3639 flow, removed 49 selfloop flow, removed 22 redundant places. [2023-11-17 16:14:21,623 INFO L231 Difference]: Finished difference. Result has 215 places, 216 transitions, 2086 flow [2023-11-17 16:14:21,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2086, PETRI_PLACES=215, PETRI_TRANSITIONS=216} [2023-11-17 16:14:21,623 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 195 predicate places. [2023-11-17 16:14:21,623 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 216 transitions, 2086 flow [2023-11-17 16:14:21,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 62.7) internal successors, (1254), 20 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:21,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:21,624 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:21,628 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 16:14:21,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-17 16:14:21,828 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 16:14:21,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:21,828 INFO L85 PathProgramCache]: Analyzing trace with hash 170323770, now seen corresponding path program 18 times [2023-11-17 16:14:21,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:21,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538212599] [2023-11-17 16:14:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:21,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:21,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:21,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:14:21,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:21,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538212599] [2023-11-17 16:14:21,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538212599] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:21,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10597353] [2023-11-17 16:14:21,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 16:14:21,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:21,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:21,938 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 16:14:21,964 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 16:14:22,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-17 16:14:22,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:22,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:14:22,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:22,141 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:22,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:22,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:14:22,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10597353] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:22,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:22,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-17 16:14:22,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086977924] [2023-11-17 16:14:22,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:22,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:14:22,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:22,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:14:22,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:14:22,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:22,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 216 transitions, 2086 flow. Second operand has 22 states, 22 states have (on average 62.72727272727273) internal successors, (1380), 22 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:22,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:22,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:22,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:22,631 INFO L124 PetriNetUnfolderBase]: 405/819 cut-off events. [2023-11-17 16:14:22,631 INFO L125 PetriNetUnfolderBase]: For 2993/2993 co-relation queries the response was YES. [2023-11-17 16:14:22,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4151 conditions, 819 events. 405/819 cut-off events. For 2993/2993 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4240 event pairs, 1 based on Foata normal form. 7/822 useless extension candidates. Maximal degree in co-relation 4089. Up to 520 conditions per place. [2023-11-17 16:14:22,635 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 177 selfloop transitions, 88 changer transitions 15/280 dead transitions. [2023-11-17 16:14:22,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 280 transitions, 2981 flow [2023-11-17 16:14:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-17 16:14:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-17 16:14:22,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1572 transitions. [2023-11-17 16:14:22,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2023-11-17 16:14:22,636 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1572 transitions. [2023-11-17 16:14:22,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1572 transitions. [2023-11-17 16:14:22,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:22,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1572 transitions. [2023-11-17 16:14:22,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 65.5) internal successors, (1572), 24 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:22,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 168.0) internal successors, (4200), 25 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:22,639 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 168.0) internal successors, (4200), 25 states have internal predecessors, (4200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:22,640 INFO L175 Difference]: Start difference. First operand has 215 places, 216 transitions, 2086 flow. Second operand 24 states and 1572 transitions. [2023-11-17 16:14:22,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 280 transitions, 2981 flow [2023-11-17 16:14:22,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 280 transitions, 2837 flow, removed 42 selfloop flow, removed 21 redundant places. [2023-11-17 16:14:22,656 INFO L231 Difference]: Finished difference. Result has 175 places, 226 transitions, 2323 flow [2023-11-17 16:14:22,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=1969, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2323, PETRI_PLACES=175, PETRI_TRANSITIONS=226} [2023-11-17 16:14:22,657 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-11-17 16:14:22,657 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 226 transitions, 2323 flow [2023-11-17 16:14:22,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.72727272727273) internal successors, (1380), 22 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:22,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:22,657 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:22,661 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 16:14:22,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:22,861 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 16:14:22,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:22,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1503834066, now seen corresponding path program 19 times [2023-11-17 16:14:22,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:22,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576054677] [2023-11-17 16:14:22,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:22,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576054677] [2023-11-17 16:14:22,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576054677] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:22,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662237825] [2023-11-17 16:14:22,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 16:14:22,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:22,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:22,982 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 16:14:23,021 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 16:14:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:23,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:14:23,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:23,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:14:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662237825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:23,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 19 [2023-11-17 16:14:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616529199] [2023-11-17 16:14:23,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:23,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-17 16:14:23,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:23,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-17 16:14:23,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-11-17 16:14:23,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:23,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 226 transitions, 2323 flow. Second operand has 21 states, 21 states have (on average 62.666666666666664) internal successors, (1316), 21 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:23,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:23,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:23,583 INFO L124 PetriNetUnfolderBase]: 397/772 cut-off events. [2023-11-17 16:14:23,584 INFO L125 PetriNetUnfolderBase]: For 2429/2429 co-relation queries the response was YES. [2023-11-17 16:14:23,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4053 conditions, 772 events. 397/772 cut-off events. For 2429/2429 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3781 event pairs, 6 based on Foata normal form. 10/776 useless extension candidates. Maximal degree in co-relation 4000. Up to 232 conditions per place. [2023-11-17 16:14:23,587 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 48 selfloop transitions, 39 changer transitions 180/267 dead transitions. [2023-11-17 16:14:23,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 267 transitions, 2999 flow [2023-11-17 16:14:23,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 16:14:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 16:14:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1425 transitions. [2023-11-17 16:14:23,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38555194805194803 [2023-11-17 16:14:23,589 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1425 transitions. [2023-11-17 16:14:23,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1425 transitions. [2023-11-17 16:14:23,589 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:23,589 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1425 transitions. [2023-11-17 16:14:23,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 64.77272727272727) internal successors, (1425), 22 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,592 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 168.0) internal successors, (3864), 23 states have internal predecessors, (3864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,592 INFO L175 Difference]: Start difference. First operand has 175 places, 226 transitions, 2323 flow. Second operand 22 states and 1425 transitions. [2023-11-17 16:14:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 267 transitions, 2999 flow [2023-11-17 16:14:23,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 267 transitions, 2868 flow, removed 13 selfloop flow, removed 14 redundant places. [2023-11-17 16:14:23,608 INFO L231 Difference]: Finished difference. Result has 176 places, 64 transitions, 604 flow [2023-11-17 16:14:23,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=604, PETRI_PLACES=176, PETRI_TRANSITIONS=64} [2023-11-17 16:14:23,608 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 156 predicate places. [2023-11-17 16:14:23,608 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 64 transitions, 604 flow [2023-11-17 16:14:23,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 62.666666666666664) internal successors, (1316), 21 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:23,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:23,609 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:23,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:23,813 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,SelfDestructingSolverStorable41 [2023-11-17 16:14:23,813 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 16:14:23,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:23,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1088602234, now seen corresponding path program 20 times [2023-11-17 16:14:23,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:23,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548371220] [2023-11-17 16:14:23,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:23,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 16:14:23,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:23,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548371220] [2023-11-17 16:14:23,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548371220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:23,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723453542] [2023-11-17 16:14:23,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 16:14:23,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:23,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:23,951 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 16:14:23,953 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 16:14:24,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 16:14:24,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:24,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:14:24,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:24,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:14:24,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723453542] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:24,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:24,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-17 16:14:24,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934713935] [2023-11-17 16:14:24,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:24,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:14:24,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:24,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:14:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:14:24,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:24,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 64 transitions, 604 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:24,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:24,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:24,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:24,590 INFO L124 PetriNetUnfolderBase]: 106/278 cut-off events. [2023-11-17 16:14:24,590 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2023-11-17 16:14:24,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1272 conditions, 278 events. 106/278 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1213 event pairs, 0 based on Foata normal form. 7/285 useless extension candidates. Maximal degree in co-relation 1223. Up to 53 conditions per place. [2023-11-17 16:14:24,591 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 26 selfloop transitions, 17 changer transitions 66/109 dead transitions. [2023-11-17 16:14:24,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 109 transitions, 962 flow [2023-11-17 16:14:24,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-17 16:14:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-17 16:14:24,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1673 transitions. [2023-11-17 16:14:24,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38301282051282054 [2023-11-17 16:14:24,593 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1673 transitions. [2023-11-17 16:14:24,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1673 transitions. [2023-11-17 16:14:24,593 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:24,593 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1673 transitions. [2023-11-17 16:14:24,594 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 64.34615384615384) internal successors, (1673), 26 states have internal predecessors, (1673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:24,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:24,597 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 168.0) internal successors, (4536), 27 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:24,597 INFO L175 Difference]: Start difference. First operand has 176 places, 64 transitions, 604 flow. Second operand 26 states and 1673 transitions. [2023-11-17 16:14:24,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 109 transitions, 962 flow [2023-11-17 16:14:24,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 109 transitions, 739 flow, removed 21 selfloop flow, removed 41 redundant places. [2023-11-17 16:14:24,601 INFO L231 Difference]: Finished difference. Result has 107 places, 30 transitions, 176 flow [2023-11-17 16:14:24,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=176, PETRI_PLACES=107, PETRI_TRANSITIONS=30} [2023-11-17 16:14:24,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-11-17 16:14:24,607 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 30 transitions, 176 flow [2023-11-17 16:14:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:24,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 16:14:24,607 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 16:14:24,611 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 16:14:24,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:24,812 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 16:14:24,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 16:14:24,812 INFO L85 PathProgramCache]: Analyzing trace with hash 659855198, now seen corresponding path program 21 times [2023-11-17 16:14:24,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 16:14:24,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455965577] [2023-11-17 16:14:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 16:14:24,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 16:14:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 16:14:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-17 16:14:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 16:14:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455965577] [2023-11-17 16:14:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455965577] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 16:14:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973819944] [2023-11-17 16:14:24,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 16:14:24,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 16:14:24,937 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 16:14:24,939 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 16:14:25,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-17 16:14:25,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 16:14:25,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-17 16:14:25,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 16:14:25,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 16:14:25,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 16:14:25,209 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 16:14:25,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973819944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 16:14:25,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 16:14:25,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 7] total 20 [2023-11-17 16:14:25,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198019283] [2023-11-17 16:14:25,210 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 16:14:25,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-17 16:14:25,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 16:14:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-17 16:14:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-11-17 16:14:25,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 168 [2023-11-17 16:14:25,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 30 transitions, 176 flow. Second operand has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 16:14:25,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 168 [2023-11-17 16:14:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 16:14:25,380 INFO L124 PetriNetUnfolderBase]: 30/89 cut-off events. [2023-11-17 16:14:25,380 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2023-11-17 16:14:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337 conditions, 89 events. 30/89 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 209 event pairs, 0 based on Foata normal form. 4/93 useless extension candidates. Maximal degree in co-relation 306. Up to 21 conditions per place. [2023-11-17 16:14:25,383 INFO L140 encePairwiseOnDemand]: 160/168 looper letters, 0 selfloop transitions, 0 changer transitions 48/48 dead transitions. [2023-11-17 16:14:25,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 48 transitions, 311 flow [2023-11-17 16:14:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 16:14:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 16:14:25,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1021 transitions. [2023-11-17 16:14:25,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37983630952380953 [2023-11-17 16:14:25,397 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1021 transitions. [2023-11-17 16:14:25,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1021 transitions. [2023-11-17 16:14:25,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 16:14:25,397 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1021 transitions. [2023-11-17 16:14:25,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 63.8125) internal successors, (1021), 16 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 168.0) internal successors, (2856), 17 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,399 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 168.0) internal successors, (2856), 17 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,399 INFO L175 Difference]: Start difference. First operand has 107 places, 30 transitions, 176 flow. Second operand 16 states and 1021 transitions. [2023-11-17 16:14:25,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 48 transitions, 311 flow [2023-11-17 16:14:25,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 48 transitions, 236 flow, removed 14 selfloop flow, removed 24 redundant places. [2023-11-17 16:14:25,400 INFO L231 Difference]: Finished difference. Result has 65 places, 0 transitions, 0 flow [2023-11-17 16:14:25,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=168, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=0, PETRI_PLACES=65, PETRI_TRANSITIONS=0} [2023-11-17 16:14:25,401 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 45 predicate places. [2023-11-17 16:14:25,401 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 0 transitions, 0 flow [2023-11-17 16:14:25,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 62.59090909090909) internal successors, (1377), 22 states have internal predecessors, (1377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 16:14:25,403 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-11-17 16:14:25,403 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-11-17 16:14:25,403 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-11-17 16:14:25,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-11-17 16:14:25,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 16:14:25,621 INFO L445 BasicCegarLoop]: Path program histogram: [21, 16, 6, 1] [2023-11-17 16:14:25,623 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-11-17 16:14:25,623 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-17 16:14:25,625 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.11 04:14:25 BasicIcfg [2023-11-17 16:14:25,625 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-17 16:14:25,626 INFO L158 Benchmark]: Toolchain (without parser) took 46771.45ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 208.8MB in the beginning and 493.9MB in the end (delta: -285.1MB). Peak memory consumption was 99.5MB. Max. memory is 8.0GB. [2023-11-17 16:14:25,626 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 132.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-11-17 16:14:25,626 INFO L158 Benchmark]: CACSL2BoogieTranslator took 217.95ms. Allocated memory is still 255.9MB. Free memory was 208.6MB in the beginning and 197.3MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-11-17 16:14:25,626 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.45ms. Allocated memory is still 255.9MB. Free memory was 197.3MB in the beginning and 195.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-11-17 16:14:25,628 INFO L158 Benchmark]: Boogie Preprocessor took 20.18ms. Allocated memory is still 255.9MB. Free memory was 195.6MB in the beginning and 194.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-11-17 16:14:25,628 INFO L158 Benchmark]: RCFGBuilder took 312.43ms. Allocated memory is still 255.9MB. Free memory was 194.6MB in the beginning and 179.3MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-11-17 16:14:25,628 INFO L158 Benchmark]: TraceAbstraction took 46185.82ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 178.4MB in the beginning and 493.9MB in the end (delta: -315.5MB). Peak memory consumption was 69.1MB. Max. memory is 8.0GB. [2023-11-17 16:14:25,629 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 132.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 217.95ms. Allocated memory is still 255.9MB. Free memory was 208.6MB in the beginning and 197.3MB in the end (delta: 11.3MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.45ms. Allocated memory is still 255.9MB. Free memory was 197.3MB in the beginning and 195.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.18ms. Allocated memory is still 255.9MB. Free memory was 195.6MB in the beginning and 194.6MB in the end (delta: 1.1MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 312.43ms. Allocated memory is still 255.9MB. Free memory was 194.6MB in the beginning and 179.3MB in the end (delta: 15.3MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 46185.82ms. Allocated memory was 255.9MB in the beginning and 639.6MB in the end (delta: 383.8MB). Free memory was 178.4MB in the beginning and 493.9MB in the end (delta: -315.5MB). Peak memory consumption was 69.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.7s, 81 PlacesBefore, 20 PlacesAfterwards, 80 TransitionsBefore, 15 TransitionsAfterwards, 648 CoEnabledTransitionPairs, 7 FixpointIterations, 41 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 77 TotalNumberOfCompositions, 667 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 662, independent: 660, independent conditional: 0, independent unconditional: 660, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 459, independent: 457, independent conditional: 0, independent unconditional: 457, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 459, independent: 455, independent conditional: 0, independent unconditional: 455, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 4, independent: 2, independent conditional: 0, independent unconditional: 2, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 10, independent: 5, independent conditional: 0, independent unconditional: 5, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 662, independent: 203, independent conditional: 0, independent unconditional: 203, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 459, unknown conditional: 0, unknown unconditional: 459] , 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 - PositiveResult [Line: 76]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 110 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: 46.1s, OverallIterations: 44, TraceHistogramMax: 4, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 19.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3158 SdHoareTripleChecker+Valid, 8.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3158 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 7.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 833 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 20921 IncrementalHoareTripleChecker+Invalid, 21754 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 833 mSolverCounterUnsat, 0 mSDtfsCounter, 20921 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1879 GetRequests, 672 SyntacticMatches, 7 SemanticMatches, 1200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11438 ImplicationChecksByTransitivity, 12.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3175occurred in iteration=37, InterpolantAutomatonStates: 873, 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: 0.3s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 13.4s InterpolantComputationTime, 1276 NumberOfCodeBlocks, 1276 NumberOfCodeBlocksAsserted, 122 NumberOfCheckSat, 1750 ConstructedInterpolants, 0 QuantifiedInterpolants, 15946 SizeOfPredicates, 42 NumberOfNonLiveVariables, 4762 ConjunctsInSsa, 764 ConjunctsInUnsatCore, 118 InterpolantComputations, 7 PerfectInterpolantSequences, 48/562 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-17 16:14:25,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...