/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/pthread-C-DAC/pthread-demo-datarace-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:31:10,004 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:31:10,089 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 15:31:10,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:31:10,121 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:31:10,122 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:31:10,122 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:31:10,122 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:31:10,123 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:31:10,126 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:31:10,127 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:31:10,127 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:31:10,128 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:31:10,129 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:31:10,129 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:31:10,129 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:31:10,129 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:31:10,130 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:31:10,130 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:31:10,130 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:31:10,130 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:31:10,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:31:10,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:31:10,131 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:31:10,131 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:31:10,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:31:10,133 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:31:10,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:31:10,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:31:10,133 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:31:10,134 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:31:10,135 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:31:10,135 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:31:10,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:31:10,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:31:10,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:31:10,407 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:31:10,407 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:31:10,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-17 15:31:11,600 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:31:11,898 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:31:11,899 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i [2023-11-17 15:31:11,923 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0faeb1f1c/6209b59e23d24e4bb299f5e76aa82881/FLAG55524fbc4 [2023-11-17 15:31:11,941 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0faeb1f1c/6209b59e23d24e4bb299f5e76aa82881 [2023-11-17 15:31:11,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:31:11,944 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:31:11,947 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:31:11,947 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:31:11,951 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:31:11,952 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:11" (1/1) ... [2023-11-17 15:31:11,953 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4006bf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:11, skipping insertion in model container [2023-11-17 15:31:11,953 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:31:11" (1/1) ... [2023-11-17 15:31:12,011 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:31:12,175 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-17 15:31:12,463 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:31:12,477 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:31:12,491 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-C-DAC/pthread-demo-datarace-1.i[820,833] [2023-11-17 15:31:12,547 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:31:12,634 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:31:12,635 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12 WrapperNode [2023-11-17 15:31:12,635 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:31:12,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:31:12,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:31:12,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:31:12,642 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,661 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,681 INFO L138 Inliner]: procedures = 365, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-11-17 15:31:12,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:31:12,682 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:31:12,682 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:31:12,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:31:12,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,693 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,693 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,698 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,717 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,719 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,720 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,723 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:31:12,724 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:31:12,724 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:31:12,724 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:31:12,725 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (1/1) ... [2023-11-17 15:31:12,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:31:12,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:12,762 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 15:31:12,789 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 15:31:12,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:31:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:31:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:31:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:31:12,798 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:31:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:31:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:31:12,799 INFO L130 BoogieDeclarations]: Found specification of procedure thread_function_mutex [2023-11-17 15:31:12,799 INFO L138 BoogieDeclarations]: Found implementation of procedure thread_function_mutex [2023-11-17 15:31:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:31:12,800 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:31:12,800 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:31:12,801 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 15:31:12,971 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:31:12,973 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:31:13,173 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:31:13,209 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:31:13,209 INFO L307 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-17 15:31:13,211 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:31:13 BoogieIcfgContainer [2023-11-17 15:31:13,211 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:31:13,213 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:31:13,214 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:31:13,217 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:31:13,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:31:11" (1/3) ... [2023-11-17 15:31:13,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c1b476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:13, skipping insertion in model container [2023-11-17 15:31:13,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:31:12" (2/3) ... [2023-11-17 15:31:13,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9c1b476 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:31:13, skipping insertion in model container [2023-11-17 15:31:13,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:31:13" (3/3) ... [2023-11-17 15:31:13,219 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-demo-datarace-1.i [2023-11-17 15:31:13,234 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:31:13,235 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:31:13,235 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:31:13,301 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:31:13,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 87 places, 90 transitions, 187 flow [2023-11-17 15:31:13,379 INFO L124 PetriNetUnfolderBase]: 7/89 cut-off events. [2023-11-17 15:31:13,379 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:31:13,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 89 events. 7/89 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 88 event pairs, 0 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-17 15:31:13,386 INFO L82 GeneralOperation]: Start removeDead. Operand has 87 places, 90 transitions, 187 flow [2023-11-17 15:31:13,393 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 78 transitions, 162 flow [2023-11-17 15:31:13,396 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:31:13,414 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 76 places, 78 transitions, 162 flow [2023-11-17 15:31:13,419 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 76 places, 78 transitions, 162 flow [2023-11-17 15:31:13,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 78 transitions, 162 flow [2023-11-17 15:31:13,445 INFO L124 PetriNetUnfolderBase]: 6/78 cut-off events. [2023-11-17 15:31:13,446 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:31:13,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 78 events. 6/78 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 40. Up to 2 conditions per place. [2023-11-17 15:31:13,448 INFO L119 LiptonReduction]: Number of co-enabled transitions 800 [2023-11-17 15:31:15,399 INFO L134 LiptonReduction]: Checked pairs total: 986 [2023-11-17 15:31:15,399 INFO L136 LiptonReduction]: Total number of compositions: 69 [2023-11-17 15:31:15,413 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:31:15,419 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;@4c77541c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:31:15,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:31:15,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:31:15,424 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-17 15:31:15,424 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:31:15,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:15,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:15,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:15,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:15,429 INFO L85 PathProgramCache]: Analyzing trace with hash -2078846454, now seen corresponding path program 1 times [2023-11-17 15:31:15,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:15,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952644220] [2023-11-17 15:31:15,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:15,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:15,668 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 15:31:15,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:15,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952644220] [2023-11-17 15:31:15,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952644220] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:31:15,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:31:15,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:31:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550437797] [2023-11-17 15:31:15,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:31:15,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:31:15,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:15,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:31:15,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:31:15,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2023-11-17 15:31:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 15 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2023-11-17 15:31:15,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:15,782 INFO L124 PetriNetUnfolderBase]: 41/86 cut-off events. [2023-11-17 15:31:15,783 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:31:15,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176 conditions, 86 events. 41/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 205 event pairs, 15 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 162. Up to 53 conditions per place. [2023-11-17 15:31:15,785 INFO L140 encePairwiseOnDemand]: 156/159 looper letters, 20 selfloop transitions, 2 changer transitions 0/23 dead transitions. [2023-11-17 15:31:15,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 23 transitions, 96 flow [2023-11-17 15:31:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:31:15,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:31:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-11-17 15:31:15,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48846960167714887 [2023-11-17 15:31:15,802 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-11-17 15:31:15,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-11-17 15:31:15,804 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:15,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-11-17 15:31:15,811 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:15,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:15,816 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:15,818 INFO L175 Difference]: Start difference. First operand has 17 places, 15 transitions, 36 flow. Second operand 3 states and 233 transitions. [2023-11-17 15:31:15,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 23 transitions, 96 flow [2023-11-17 15:31:15,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 17 places, 23 transitions, 92 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-17 15:31:15,822 INFO L231 Difference]: Finished difference. Result has 18 places, 16 transitions, 44 flow [2023-11-17 15:31:15,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=18, PETRI_TRANSITIONS=16} [2023-11-17 15:31:15,827 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 1 predicate places. [2023-11-17 15:31:15,827 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 16 transitions, 44 flow [2023-11-17 15:31:15,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:15,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:15,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:15,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:31:15,829 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:15,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 349121956, now seen corresponding path program 1 times [2023-11-17 15:31:15,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:15,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576174022] [2023-11-17 15:31:15,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:15,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:15,964 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 15:31:15,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:15,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576174022] [2023-11-17 15:31:15,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576174022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:31:15,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:31:15,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-17 15:31:15,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695843714] [2023-11-17 15:31:15,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:31:15,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:31:15,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:15,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:31:15,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:31:15,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-11-17 15:31:15,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 18 places, 16 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:15,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:15,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-11-17 15:31:15,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:16,018 INFO L124 PetriNetUnfolderBase]: 61/139 cut-off events. [2023-11-17 15:31:16,018 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-17 15:31:16,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 139 events. 61/139 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 476 event pairs, 27 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 71. Up to 85 conditions per place. [2023-11-17 15:31:16,020 INFO L140 encePairwiseOnDemand]: 156/159 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-11-17 15:31:16,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 25 transitions, 120 flow [2023-11-17 15:31:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:31:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:31:16,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2023-11-17 15:31:16,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4758909853249476 [2023-11-17 15:31:16,022 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2023-11-17 15:31:16,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2023-11-17 15:31:16,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:16,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2023-11-17 15:31:16,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,025 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,025 INFO L175 Difference]: Start difference. First operand has 18 places, 16 transitions, 44 flow. Second operand 3 states and 227 transitions. [2023-11-17 15:31:16,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 25 transitions, 120 flow [2023-11-17 15:31:16,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 25 transitions, 116 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:31:16,027 INFO L231 Difference]: Finished difference. Result has 20 places, 17 transitions, 54 flow [2023-11-17 15:31:16,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=54, PETRI_PLACES=20, PETRI_TRANSITIONS=17} [2023-11-17 15:31:16,027 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 3 predicate places. [2023-11-17 15:31:16,028 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 17 transitions, 54 flow [2023-11-17 15:31:16,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:16,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:16,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:31:16,028 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:16,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1474064387, now seen corresponding path program 1 times [2023-11-17 15:31:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:16,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77382134] [2023-11-17 15:31:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:16,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:31:16,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:16,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77382134] [2023-11-17 15:31:16,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77382134] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:16,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988376110] [2023-11-17 15:31:16,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:16,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:16,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:16,108 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 15:31:16,116 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 15:31:16,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:16,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:31:16,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:31:16,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:16,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:31:16,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988376110] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:16,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:16,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-17 15:31:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090823860] [2023-11-17 15:31:16,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:16,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-17 15:31:16,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:16,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-17 15:31:16,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-17 15:31:16,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-11-17 15:31:16,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 17 transitions, 54 flow. Second operand has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:16,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-11-17 15:31:16,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:16,463 INFO L124 PetriNetUnfolderBase]: 111/264 cut-off events. [2023-11-17 15:31:16,463 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2023-11-17 15:31:16,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 264 events. 111/264 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 944 event pairs, 18 based on Foata normal form. 30/294 useless extension candidates. Maximal degree in co-relation 166. Up to 55 conditions per place. [2023-11-17 15:31:16,466 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 44 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2023-11-17 15:31:16,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 51 transitions, 258 flow [2023-11-17 15:31:16,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:31:16,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:31:16,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 456 transitions. [2023-11-17 15:31:16,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2023-11-17 15:31:16,469 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 456 transitions. [2023-11-17 15:31:16,470 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 456 transitions. [2023-11-17 15:31:16,470 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:16,470 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 456 transitions. [2023-11-17 15:31:16,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 76.0) internal successors, (456), 6 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,473 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,474 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,474 INFO L175 Difference]: Start difference. First operand has 20 places, 17 transitions, 54 flow. Second operand 6 states and 456 transitions. [2023-11-17 15:31:16,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 51 transitions, 258 flow [2023-11-17 15:31:16,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 51 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-17 15:31:16,476 INFO L231 Difference]: Finished difference. Result has 28 places, 20 transitions, 92 flow [2023-11-17 15:31:16,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=20} [2023-11-17 15:31:16,477 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 11 predicate places. [2023-11-17 15:31:16,477 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 20 transitions, 92 flow [2023-11-17 15:31:16,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 71.57142857142857) internal successors, (501), 7 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:16,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:16,478 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:16,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:31:16,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:16,685 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:16,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1958922008, now seen corresponding path program 2 times [2023-11-17 15:31:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:16,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989980119] [2023-11-17 15:31:16,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:16,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-17 15:31:16,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989980119] [2023-11-17 15:31:16,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989980119] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:16,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693356338] [2023-11-17 15:31:16,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-17 15:31:16,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:16,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:16,803 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 15:31:16,808 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 15:31:16,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-17 15:31:16,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:31:16,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-17 15:31:16,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:31:16,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-17 15:31:17,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693356338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:17,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:17,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-11-17 15:31:17,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658947907] [2023-11-17 15:31:17,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:17,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-17 15:31:17,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-17 15:31:17,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-11-17 15:31:17,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 159 [2023-11-17 15:31:17,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 20 transitions, 92 flow. Second operand has 14 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:17,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:17,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 159 [2023-11-17 15:31:17,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:17,523 INFO L124 PetriNetUnfolderBase]: 323/744 cut-off events. [2023-11-17 15:31:17,523 INFO L125 PetriNetUnfolderBase]: For 1524/1524 co-relation queries the response was YES. [2023-11-17 15:31:17,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2272 conditions, 744 events. 323/744 cut-off events. For 1524/1524 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3115 event pairs, 10 based on Foata normal form. 107/851 useless extension candidates. Maximal degree in co-relation 584. Up to 168 conditions per place. [2023-11-17 15:31:17,530 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 158 selfloop transitions, 69 changer transitions 0/228 dead transitions. [2023-11-17 15:31:17,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 228 transitions, 1346 flow [2023-11-17 15:31:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-17 15:31:17,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-11-17 15:31:17,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2364 transitions. [2023-11-17 15:31:17,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43729189789123196 [2023-11-17 15:31:17,537 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2364 transitions. [2023-11-17 15:31:17,538 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2364 transitions. [2023-11-17 15:31:17,539 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:17,539 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2364 transitions. [2023-11-17 15:31:17,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 69.52941176470588) internal successors, (2364), 34 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:17,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 159.0) internal successors, (5565), 35 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:17,554 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 159.0) internal successors, (5565), 35 states have internal predecessors, (5565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:17,555 INFO L175 Difference]: Start difference. First operand has 28 places, 20 transitions, 92 flow. Second operand 34 states and 2364 transitions. [2023-11-17 15:31:17,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 228 transitions, 1346 flow [2023-11-17 15:31:17,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 228 transitions, 1286 flow, removed 27 selfloop flow, removed 1 redundant places. [2023-11-17 15:31:17,563 INFO L231 Difference]: Finished difference. Result has 85 places, 82 transitions, 724 flow [2023-11-17 15:31:17,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=82} [2023-11-17 15:31:17,564 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 68 predicate places. [2023-11-17 15:31:17,564 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 82 transitions, 724 flow [2023-11-17 15:31:17,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:17,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:17,565 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:17,576 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 15:31:17,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-17 15:31:17,771 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:17,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:17,771 INFO L85 PathProgramCache]: Analyzing trace with hash 198866130, now seen corresponding path program 3 times [2023-11-17 15:31:17,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:17,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314654968] [2023-11-17 15:31:17,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:17,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-17 15:31:18,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:18,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314654968] [2023-11-17 15:31:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314654968] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869505203] [2023-11-17 15:31:18,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-17 15:31:18,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:18,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:18,054 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 15:31:18,071 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 15:31:18,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-17 15:31:18,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:31:18,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-17 15:31:18,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-17 15:31:18,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2023-11-17 15:31:18,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869505203] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:18,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:18,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-11-17 15:31:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445097974] [2023-11-17 15:31:18,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:18,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-17 15:31:18,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-17 15:31:18,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-11-17 15:31:18,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 159 [2023-11-17 15:31:18,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 82 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 64.94736842105263) internal successors, (1234), 19 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:18,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:18,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 159 [2023-11-17 15:31:18,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:19,863 INFO L124 PetriNetUnfolderBase]: 703/1496 cut-off events. [2023-11-17 15:31:19,863 INFO L125 PetriNetUnfolderBase]: For 27707/27709 co-relation queries the response was YES. [2023-11-17 15:31:19,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 1496 events. 703/1496 cut-off events. For 27707/27709 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 7281 event pairs, 14 based on Foata normal form. 133/1629 useless extension candidates. Maximal degree in co-relation 5825. Up to 351 conditions per place. [2023-11-17 15:31:19,880 INFO L140 encePairwiseOnDemand]: 152/159 looper letters, 330 selfloop transitions, 186 changer transitions 0/517 dead transitions. [2023-11-17 15:31:19,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 517 transitions, 5320 flow [2023-11-17 15:31:19,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-17 15:31:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-11-17 15:31:19,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 5835 transitions. [2023-11-17 15:31:19,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43174250832408434 [2023-11-17 15:31:19,897 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 5835 transitions. [2023-11-17 15:31:19,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 5835 transitions. [2023-11-17 15:31:19,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:19,901 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 5835 transitions. [2023-11-17 15:31:19,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 68.6470588235294) internal successors, (5835), 85 states have internal predecessors, (5835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:19,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 159.0) internal successors, (13674), 86 states have internal predecessors, (13674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:19,941 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 159.0) internal successors, (13674), 86 states have internal predecessors, (13674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:19,941 INFO L175 Difference]: Start difference. First operand has 85 places, 82 transitions, 724 flow. Second operand 85 states and 5835 transitions. [2023-11-17 15:31:19,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 517 transitions, 5320 flow [2023-11-17 15:31:19,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 517 transitions, 5222 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-11-17 15:31:19,981 INFO L231 Difference]: Finished difference. Result has 227 places, 208 transitions, 3292 flow [2023-11-17 15:31:19,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=3292, PETRI_PLACES=227, PETRI_TRANSITIONS=208} [2023-11-17 15:31:19,983 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 210 predicate places. [2023-11-17 15:31:19,983 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 208 transitions, 3292 flow [2023-11-17 15:31:19,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 64.94736842105263) internal successors, (1234), 19 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:19,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:19,984 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:19,993 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 15:31:20,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:20,194 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:20,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:20,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1830966057, now seen corresponding path program 4 times [2023-11-17 15:31:20,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:20,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431505268] [2023-11-17 15:31:20,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:20,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-17 15:31:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431505268] [2023-11-17 15:31:20,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431505268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128658190] [2023-11-17 15:31:20,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-17 15:31:20,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:20,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:20,508 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 15:31:20,511 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 15:31:20,698 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-17 15:31:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:31:20,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-17 15:31:20,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:20,783 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-17 15:31:20,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:21,053 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-17 15:31:21,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128658190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:21,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:21,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2023-11-17 15:31:21,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369471183] [2023-11-17 15:31:21,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:21,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 15:31:21,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:21,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 15:31:21,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:31:21,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-11-17 15:31:21,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 208 transitions, 3292 flow. Second operand has 23 states, 23 states have (on average 70.65217391304348) internal successors, (1625), 23 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:21,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:21,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-11-17 15:31:21,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:22,177 INFO L124 PetriNetUnfolderBase]: 1162/2757 cut-off events. [2023-11-17 15:31:22,178 INFO L125 PetriNetUnfolderBase]: For 214547/214549 co-relation queries the response was YES. [2023-11-17 15:31:22,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19597 conditions, 2757 events. 1162/2757 cut-off events. For 214547/214549 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 14213 event pairs, 127 based on Foata normal form. 243/3000 useless extension candidates. Maximal degree in co-relation 17296. Up to 594 conditions per place. [2023-11-17 15:31:22,230 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 327 selfloop transitions, 150 changer transitions 0/478 dead transitions. [2023-11-17 15:31:22,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 478 transitions, 9940 flow [2023-11-17 15:31:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 15:31:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 15:31:22,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1678 transitions. [2023-11-17 15:31:22,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47970268724985704 [2023-11-17 15:31:22,234 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1678 transitions. [2023-11-17 15:31:22,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1678 transitions. [2023-11-17 15:31:22,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:22,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1678 transitions. [2023-11-17 15:31:22,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 76.27272727272727) internal successors, (1678), 22 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:22,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 159.0) internal successors, (3657), 23 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:22,244 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 159.0) internal successors, (3657), 23 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:22,244 INFO L175 Difference]: Start difference. First operand has 227 places, 208 transitions, 3292 flow. Second operand 22 states and 1678 transitions. [2023-11-17 15:31:22,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 478 transitions, 9940 flow [2023-11-17 15:31:22,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 478 transitions, 8272 flow, removed 744 selfloop flow, removed 27 redundant places. [2023-11-17 15:31:22,709 INFO L231 Difference]: Finished difference. Result has 231 places, 267 transitions, 3228 flow [2023-11-17 15:31:22,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=2056, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3228, PETRI_PLACES=231, PETRI_TRANSITIONS=267} [2023-11-17 15:31:22,710 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 214 predicate places. [2023-11-17 15:31:22,710 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 267 transitions, 3228 flow [2023-11-17 15:31:22,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 70.65217391304348) internal successors, (1625), 23 states have internal predecessors, (1625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:22,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:22,711 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:22,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-17 15:31:22,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:22,916 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:22,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash 905822618, now seen corresponding path program 5 times [2023-11-17 15:31:22,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:22,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22096765] [2023-11-17 15:31:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:22,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:23,200 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-17 15:31:23,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:23,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22096765] [2023-11-17 15:31:23,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22096765] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:23,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247267170] [2023-11-17 15:31:23,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-17 15:31:23,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:23,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:23,208 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 15:31:23,226 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 15:31:23,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-17 15:31:23,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:31:23,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-17 15:31:23,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-17 15:31:23,475 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:23,579 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 20 proven. 66 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2023-11-17 15:31:23,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247267170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:23,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:23,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-11-17 15:31:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420687480] [2023-11-17 15:31:23,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:23,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-17 15:31:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-17 15:31:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-17 15:31:23,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2023-11-17 15:31:23,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 267 transitions, 3228 flow. Second operand has 17 states, 17 states have (on average 73.82352941176471) internal successors, (1255), 17 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:23,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:23,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2023-11-17 15:31:23,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:25,542 INFO L124 PetriNetUnfolderBase]: 2538/5254 cut-off events. [2023-11-17 15:31:25,543 INFO L125 PetriNetUnfolderBase]: For 710318/710320 co-relation queries the response was YES. [2023-11-17 15:31:25,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35251 conditions, 5254 events. 2538/5254 cut-off events. For 710318/710320 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 31772 event pairs, 185 based on Foata normal form. 346/5600 useless extension candidates. Maximal degree in co-relation 31458. Up to 1298 conditions per place. [2023-11-17 15:31:25,647 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 693 selfloop transitions, 198 changer transitions 0/892 dead transitions. [2023-11-17 15:31:25,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 892 transitions, 13060 flow [2023-11-17 15:31:25,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-17 15:31:25,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-17 15:31:25,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1251 transitions. [2023-11-17 15:31:25,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49174528301886794 [2023-11-17 15:31:25,652 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1251 transitions. [2023-11-17 15:31:25,652 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1251 transitions. [2023-11-17 15:31:25,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:25,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1251 transitions. [2023-11-17 15:31:25,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 78.1875) internal successors, (1251), 16 states have internal predecessors, (1251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:25,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 159.0) internal successors, (2703), 17 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:25,659 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 159.0) internal successors, (2703), 17 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:25,659 INFO L175 Difference]: Start difference. First operand has 231 places, 267 transitions, 3228 flow. Second operand 16 states and 1251 transitions. [2023-11-17 15:31:25,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 892 transitions, 13060 flow [2023-11-17 15:31:26,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 892 transitions, 12554 flow, removed 0 selfloop flow, removed 11 redundant places. [2023-11-17 15:31:26,409 INFO L231 Difference]: Finished difference. Result has 244 places, 375 transitions, 4592 flow [2023-11-17 15:31:26,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4592, PETRI_PLACES=244, PETRI_TRANSITIONS=375} [2023-11-17 15:31:26,410 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 227 predicate places. [2023-11-17 15:31:26,410 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 375 transitions, 4592 flow [2023-11-17 15:31:26,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 73.82352941176471) internal successors, (1255), 17 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:26,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:26,411 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:26,420 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 15:31:26,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:26,618 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:26,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:26,618 INFO L85 PathProgramCache]: Analyzing trace with hash 687378012, now seen corresponding path program 6 times [2023-11-17 15:31:26,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:26,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326643987] [2023-11-17 15:31:26,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:26,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:26,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:27,183 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 317 proven. 378 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-17 15:31:27,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326643987] [2023-11-17 15:31:27,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326643987] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819494685] [2023-11-17 15:31:27,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-17 15:31:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:27,190 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 15:31:27,214 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 15:31:27,669 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-11-17 15:31:27,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-17 15:31:27,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-17 15:31:27,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 317 proven. 378 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-17 15:31:27,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:28,085 INFO L134 CoverageAnalysis]: Checked inductivity of 968 backedges. 317 proven. 378 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2023-11-17 15:31:28,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819494685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:28,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:28,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-17 15:31:28,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127114150] [2023-11-17 15:31:28,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:28,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-17 15:31:28,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:28,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-17 15:31:28,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2023-11-17 15:31:28,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 159 [2023-11-17 15:31:28,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 375 transitions, 4592 flow. Second operand has 23 states, 23 states have (on average 74.21739130434783) internal successors, (1707), 23 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:28,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:28,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 159 [2023-11-17 15:31:28,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:31:30,580 INFO L124 PetriNetUnfolderBase]: 3570/7318 cut-off events. [2023-11-17 15:31:30,580 INFO L125 PetriNetUnfolderBase]: For 747185/747187 co-relation queries the response was YES. [2023-11-17 15:31:30,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49413 conditions, 7318 events. 3570/7318 cut-off events. For 747185/747187 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 45256 event pairs, 185 based on Foata normal form. 260/7578 useless extension candidates. Maximal degree in co-relation 44884. Up to 1826 conditions per place. [2023-11-17 15:31:30,684 INFO L140 encePairwiseOnDemand]: 155/159 looper letters, 1059 selfloop transitions, 270 changer transitions 0/1330 dead transitions. [2023-11-17 15:31:30,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 1330 transitions, 20012 flow [2023-11-17 15:31:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-17 15:31:30,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-11-17 15:31:30,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1717 transitions. [2023-11-17 15:31:30,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4908519153802173 [2023-11-17 15:31:30,687 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1717 transitions. [2023-11-17 15:31:30,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1717 transitions. [2023-11-17 15:31:30,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:31:30,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1717 transitions. [2023-11-17 15:31:30,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.04545454545455) internal successors, (1717), 22 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:30,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 159.0) internal successors, (3657), 23 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:30,695 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 159.0) internal successors, (3657), 23 states have internal predecessors, (3657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:30,695 INFO L175 Difference]: Start difference. First operand has 244 places, 375 transitions, 4592 flow. Second operand 22 states and 1717 transitions. [2023-11-17 15:31:30,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 1330 transitions, 20012 flow [2023-11-17 15:31:31,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1330 transitions, 19882 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-11-17 15:31:31,696 INFO L231 Difference]: Finished difference. Result has 267 places, 459 transitions, 6216 flow [2023-11-17 15:31:31,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=159, PETRI_DIFFERENCE_MINUEND_FLOW=4462, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6216, PETRI_PLACES=267, PETRI_TRANSITIONS=459} [2023-11-17 15:31:31,697 INFO L281 CegarLoopForPetriNet]: 17 programPoint places, 250 predicate places. [2023-11-17 15:31:31,697 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 459 transitions, 6216 flow [2023-11-17 15:31:31,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 74.21739130434783) internal successors, (1707), 23 states have internal predecessors, (1707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:31,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:31:31,698 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:31:31,709 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 15:31:31,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:31,905 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:31:31,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:31:31,906 INFO L85 PathProgramCache]: Analyzing trace with hash -306418592, now seen corresponding path program 7 times [2023-11-17 15:31:31,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:31:31,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980143820] [2023-11-17 15:31:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:31:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:31:32,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:31:35,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:31:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980143820] [2023-11-17 15:31:35,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980143820] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:31:35,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940632508] [2023-11-17 15:31:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-17 15:31:35,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:31:35,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:31:35,157 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 15:31:35,160 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 15:31:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:31:35,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-17 15:31:35,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:31:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:31:35,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:31:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 0 proven. 1370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:31:35,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940632508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:31:35,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:31:35,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 61 [2023-11-17 15:31:35,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771418160] [2023-11-17 15:31:35,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:31:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-11-17 15:31:35,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:31:35,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-11-17 15:31:35,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=3783, Unknown=0, NotChecked=0, Total=3906 [2023-11-17 15:31:35,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 159 [2023-11-17 15:31:35,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 459 transitions, 6216 flow. Second operand has 63 states, 63 states have (on average 70.34920634920636) internal successors, (4432), 63 states have internal predecessors, (4432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:31:35,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:31:35,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 159 [2023-11-17 15:31:35,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:34:36,555 INFO L124 PetriNetUnfolderBase]: 97811/195645 cut-off events. [2023-11-17 15:34:36,555 INFO L125 PetriNetUnfolderBase]: For 12117127/12117127 co-relation queries the response was YES. [2023-11-17 15:34:45,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1732077 conditions, 195645 events. 97811/195645 cut-off events. For 12117127/12117127 co-relation queries the response was YES. Maximal size of possible extension queue 1656. Compared 2005561 event pairs, 5826 based on Foata normal form. 1/195646 useless extension candidates. Maximal degree in co-relation 1710807. Up to 43391 conditions per place. [2023-11-17 15:34:46,455 INFO L140 encePairwiseOnDemand]: 154/159 looper letters, 13449 selfloop transitions, 1333 changer transitions 1/14783 dead transitions. [2023-11-17 15:34:46,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 739 places, 14783 transitions, 283759 flow [2023-11-17 15:34:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 473 states. [2023-11-17 15:34:46,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 473 states. [2023-11-17 15:34:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 35899 transitions. [2023-11-17 15:34:46,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4773358862871807 [2023-11-17 15:34:46,692 INFO L72 ComplementDD]: Start complementDD. Operand 473 states and 35899 transitions. [2023-11-17 15:34:46,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 473 states and 35899 transitions. [2023-11-17 15:34:46,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:34:46,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 473 states and 35899 transitions. [2023-11-17 15:34:46,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 474 states, 473 states have (on average 75.89640591966173) internal successors, (35899), 473 states have internal predecessors, (35899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:46,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 474 states, 474 states have (on average 159.0) internal successors, (75366), 474 states have internal predecessors, (75366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:47,013 INFO L81 ComplementDD]: Finished complementDD. Result has 474 states, 474 states have (on average 159.0) internal successors, (75366), 474 states have internal predecessors, (75366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:34:47,014 INFO L175 Difference]: Start difference. First operand has 267 places, 459 transitions, 6216 flow. Second operand 473 states and 35899 transitions. [2023-11-17 15:34:47,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 739 places, 14783 transitions, 283759 flow Received shutdown request... [2023-11-17 15:37:09,401 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 15:37:09,401 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-11-17 15:37:10,417 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2023-11-17 15:37:10,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown