/usr/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-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 11:58:42,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 11:58:42,166 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-NoLbe.epf [2023-11-10 11:58:42,197 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 11:58:42,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 11:58:42,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 11:58:42,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 11:58:42,199 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 11:58:42,200 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 11:58:42,204 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 11:58:42,204 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 11:58:42,204 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 11:58:42,205 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 11:58:42,206 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 11:58:42,206 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 11:58:42,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 11:58:42,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 11:58:42,207 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 11:58:42,207 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 11:58:42,207 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 11:58:42,207 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 11:58:42,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 11:58:42,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 11:58:42,208 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 11:58:42,209 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 11:58:42,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:58:42,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 11:58:42,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 11:58:42,209 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 11:58:42,210 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 11:58:42,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 11:58:42,211 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 11:58:42,211 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 11:58:42,211 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 11:58:42,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 11:58:42,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 11:58:42,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 11:58:42,462 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 11:58:42,462 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 11:58:42,463 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-11-10 11:58:43,622 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 11:58:43,825 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 11:58:43,825 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i [2023-11-10 11:58:43,849 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73087c1cd/faa5dfb67add440296db69bed1bb2e47/FLAG6a5ffe7ca [2023-11-10 11:58:43,864 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73087c1cd/faa5dfb67add440296db69bed1bb2e47 [2023-11-10 11:58:43,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 11:58:43,867 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 11:58:43,868 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 11:58:43,868 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 11:58:43,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 11:58:43,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:58:43" (1/1) ... [2023-11-10 11:58:43,874 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43b49abc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:43, skipping insertion in model container [2023-11-10 11:58:43,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:58:43" (1/1) ... [2023-11-10 11:58:43,933 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 11:58:44,176 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2023-11-10 11:58:44,199 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:58:44,214 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 11:58:44,248 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_51-mutexptr_racefree.i[30176,30189] [2023-11-10 11:58:44,254 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:58:44,291 INFO L206 MainTranslator]: Completed translation [2023-11-10 11:58:44,292 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44 WrapperNode [2023-11-10 11:58:44,292 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 11:58:44,293 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 11:58:44,293 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 11:58:44,293 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 11:58:44,299 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,324 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,344 INFO L138 Inliner]: procedures = 170, calls = 37, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 89 [2023-11-10 11:58:44,345 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 11:58:44,345 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 11:58:44,345 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 11:58:44,346 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 11:58:44,352 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,354 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,363 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,372 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,374 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,375 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,378 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 11:58:44,378 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 11:58:44,379 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 11:58:44,379 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 11:58:44,379 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (1/1) ... [2023-11-10 11:58:44,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:58:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:44,407 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) [2023-11-10 11:58:44,416 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 [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-10 11:58:44,439 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 11:58:44,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 11:58:44,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 11:58:44,441 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-10 11:58:44,547 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 11:58:44,549 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 11:58:44,735 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 11:58:44,744 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 11:58:44,744 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-10 11:58:44,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:58:44 BoogieIcfgContainer [2023-11-10 11:58:44,748 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 11:58:44,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 11:58:44,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 11:58:44,753 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 11:58:44,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 11:58:43" (1/3) ... [2023-11-10 11:58:44,753 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b81f639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:58:44, skipping insertion in model container [2023-11-10 11:58:44,753 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:44" (2/3) ... [2023-11-10 11:58:44,754 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b81f639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:58:44, skipping insertion in model container [2023-11-10 11:58:44,754 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:58:44" (3/3) ... [2023-11-10 11:58:44,755 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_51-mutexptr_racefree.i [2023-11-10 11:58:44,772 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 11:58:44,772 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-10 11:58:44,773 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 11:58:44,840 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-10 11:58:44,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 128 transitions, 263 flow [2023-11-10 11:58:44,981 INFO L124 PetriNetUnfolderBase]: 17/169 cut-off events. [2023-11-10 11:58:44,982 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 11:58:44,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 169 events. 17/169 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 405 event pairs, 0 based on Foata normal form. 0/147 useless extension candidates. Maximal degree in co-relation 81. Up to 4 conditions per place. [2023-11-10 11:58:44,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 119 places, 128 transitions, 263 flow [2023-11-10 11:58:44,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 123 transitions, 250 flow [2023-11-10 11:58:45,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:45,016 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:45,018 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:45,056 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:45,057 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:45,057 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:45,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:45,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:45,058 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:45,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2006580530, now seen corresponding path program 1 times [2023-11-10 11:58:45,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:45,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528243260] [2023-11-10 11:58:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:45,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:45,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:45,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:45,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528243260] [2023-11-10 11:58:45,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528243260] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:45,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:45,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:45,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949740443] [2023-11-10 11:58:45,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:45,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:45,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:45,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:45,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 128 [2023-11-10 11:58:45,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:45,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 128 [2023-11-10 11:58:45,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:45,531 INFO L124 PetriNetUnfolderBase]: 0/115 cut-off events. [2023-11-10 11:58:45,531 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:45,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 115 events. 0/115 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 89 event pairs, 0 based on Foata normal form. 28/140 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-11-10 11:58:45,533 INFO L140 encePairwiseOnDemand]: 114/128 looper letters, 9 selfloop transitions, 2 changer transitions 18/113 dead transitions. [2023-11-10 11:58:45,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 113 transitions, 254 flow [2023-11-10 11:58:45,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 346 transitions. [2023-11-10 11:58:45,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.9010416666666666 [2023-11-10 11:58:45,551 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 346 transitions. [2023-11-10 11:58:45,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 346 transitions. [2023-11-10 11:58:45,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:45,556 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 346 transitions. [2023-11-10 11:58:45,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 128.0) internal successors, (512), 4 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,568 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 250 flow. Second operand 3 states and 346 transitions. [2023-11-10 11:58:45,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 113 transitions, 254 flow [2023-11-10 11:58:45,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 113 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:45,578 INFO L231 Difference]: Finished difference. Result has 117 places, 93 transitions, 198 flow [2023-11-10 11:58:45,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=128, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=117, PETRI_TRANSITIONS=93} [2023-11-10 11:58:45,584 INFO L281 CegarLoopForPetriNet]: 115 programPoint places, 2 predicate places. [2023-11-10 11:58:45,584 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 93 transitions, 198 flow [2023-11-10 11:58:45,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:45,586 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:45,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 11:58:45,587 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:45,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:45,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1816189679, now seen corresponding path program 1 times [2023-11-10 11:58:45,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:45,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697039318] [2023-11-10 11:58:45,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:45,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:45,629 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:45,673 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:45,674 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:45,675 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:45,676 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:45,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-10 11:58:45,677 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-10 11:58:45,679 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:45,679 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-10 11:58:45,714 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 11:58:45,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 165 transitions, 346 flow [2023-11-10 11:58:45,775 INFO L124 PetriNetUnfolderBase]: 31/273 cut-off events. [2023-11-10 11:58:45,776 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-10 11:58:45,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 273 events. 31/273 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 830 event pairs, 0 based on Foata normal form. 0/235 useless extension candidates. Maximal degree in co-relation 171. Up to 8 conditions per place. [2023-11-10 11:58:45,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 165 transitions, 346 flow [2023-11-10 11:58:45,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 151 places, 165 transitions, 346 flow [2023-11-10 11:58:45,787 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:45,789 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:45,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:45,806 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:45,806 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:45,807 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:45,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:45,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:45,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:45,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:45,808 INFO L85 PathProgramCache]: Analyzing trace with hash 120665495, now seen corresponding path program 1 times [2023-11-10 11:58:45,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:45,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058891267] [2023-11-10 11:58:45,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:45,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:45,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:45,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:45,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058891267] [2023-11-10 11:58:45,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058891267] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:45,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:45,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:45,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364496613] [2023-11-10 11:58:45,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:45,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:45,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 165 [2023-11-10 11:58:45,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 346 flow. Second operand has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:45,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 165 [2023-11-10 11:58:45,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:45,984 INFO L124 PetriNetUnfolderBase]: 2/221 cut-off events. [2023-11-10 11:58:45,984 INFO L125 PetriNetUnfolderBase]: For 14/34 co-relation queries the response was YES. [2023-11-10 11:58:45,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 260 conditions, 221 events. 2/221 cut-off events. For 14/34 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 489 event pairs, 0 based on Foata normal form. 94/307 useless extension candidates. Maximal degree in co-relation 136. Up to 22 conditions per place. [2023-11-10 11:58:45,985 INFO L140 encePairwiseOnDemand]: 145/165 looper letters, 12 selfloop transitions, 2 changer transitions 24/151 dead transitions. [2023-11-10 11:58:45,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 151 transitions, 352 flow [2023-11-10 11:58:45,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:45,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:45,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 444 transitions. [2023-11-10 11:58:45,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.896969696969697 [2023-11-10 11:58:45,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 444 transitions. [2023-11-10 11:58:45,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 444 transitions. [2023-11-10 11:58:45,993 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:45,993 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 444 transitions. [2023-11-10 11:58:45,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,998 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:45,998 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 346 flow. Second operand 3 states and 444 transitions. [2023-11-10 11:58:45,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 151 transitions, 352 flow [2023-11-10 11:58:46,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 151 transitions, 352 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:46,004 INFO L231 Difference]: Finished difference. Result has 153 places, 124 transitions, 268 flow [2023-11-10 11:58:46,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=268, PETRI_PLACES=153, PETRI_TRANSITIONS=124} [2023-11-10 11:58:46,005 INFO L281 CegarLoopForPetriNet]: 151 programPoint places, 2 predicate places. [2023-11-10 11:58:46,005 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 124 transitions, 268 flow [2023-11-10 11:58:46,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:46,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:46,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-10 11:58:46,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:46,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:46,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1370799422, now seen corresponding path program 1 times [2023-11-10 11:58:46,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:46,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306902458] [2023-11-10 11:58:46,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306902458] [2023-11-10 11:58:46,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306902458] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:46,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934228711] [2023-11-10 11:58:46,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:46,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:46,154 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) [2023-11-10 11:58:46,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-10 11:58:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:46,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:46,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:46,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:46,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934228711] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:46,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:46,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:46,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564339044] [2023-11-10 11:58:46,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:46,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:46,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:46,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:46,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:46,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 165 [2023-11-10 11:58:46,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 124 transitions, 268 flow. Second operand has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:46,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 165 [2023-11-10 11:58:46,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:46,563 INFO L124 PetriNetUnfolderBase]: 0/123 cut-off events. [2023-11-10 11:58:46,564 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-10 11:58:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 123 events. 0/123 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 2/125 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-11-10 11:58:46,564 INFO L140 encePairwiseOnDemand]: 160/165 looper letters, 9 selfloop transitions, 7 changer transitions 0/117 dead transitions. [2023-11-10 11:58:46,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 117 transitions, 284 flow [2023-11-10 11:58:46,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:46,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1215 transitions. [2023-11-10 11:58:46,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8181818181818182 [2023-11-10 11:58:46,568 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1215 transitions. [2023-11-10 11:58:46,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1215 transitions. [2023-11-10 11:58:46,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:46,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1215 transitions. [2023-11-10 11:58:46,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 135.0) internal successors, (1215), 9 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,574 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,575 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 165.0) internal successors, (1650), 10 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,575 INFO L175 Difference]: Start difference. First operand has 153 places, 124 transitions, 268 flow. Second operand 9 states and 1215 transitions. [2023-11-10 11:58:46,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 117 transitions, 284 flow [2023-11-10 11:58:46,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 117 transitions, 282 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:46,580 INFO L231 Difference]: Finished difference. Result has 125 places, 113 transitions, 256 flow [2023-11-10 11:58:46,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=165, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=256, PETRI_PLACES=125, PETRI_TRANSITIONS=113} [2023-11-10 11:58:46,582 INFO L281 CegarLoopForPetriNet]: 151 programPoint places, -26 predicate places. [2023-11-10 11:58:46,582 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 113 transitions, 256 flow [2023-11-10 11:58:46,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 135.4) internal successors, (1354), 10 states have internal predecessors, (1354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:46,584 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:46,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:46,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:46,792 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:46,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash 450166754, now seen corresponding path program 1 times [2023-11-10 11:58:46,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:46,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335247651] [2023-11-10 11:58:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:46,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:46,825 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:46,853 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:46,853 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:46,854 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:46,854 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:46,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-10 11:58:46,854 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:58:46,855 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:46,855 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-10 11:58:46,896 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-10 11:58:46,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 202 transitions, 431 flow [2023-11-10 11:58:46,953 INFO L124 PetriNetUnfolderBase]: 50/412 cut-off events. [2023-11-10 11:58:46,953 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:58:46,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 412 events. 50/412 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1428 event pairs, 1 based on Foata normal form. 0/354 useless extension candidates. Maximal degree in co-relation 281. Up to 16 conditions per place. [2023-11-10 11:58:46,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 202 transitions, 431 flow [2023-11-10 11:58:46,963 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 202 transitions, 431 flow [2023-11-10 11:58:46,965 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:46,970 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:46,970 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:46,977 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:46,977 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:46,977 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:46,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:46,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:46,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:46,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:46,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1797700127, now seen corresponding path program 1 times [2023-11-10 11:58:46,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:46,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050233244] [2023-11-10 11:58:46,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:47,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:47,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:47,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050233244] [2023-11-10 11:58:47,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050233244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:47,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:47,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:47,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23056768] [2023-11-10 11:58:47,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:47,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:47,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:47,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:47,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:47,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 202 [2023-11-10 11:58:47,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 202 transitions, 431 flow. Second operand has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:47,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 202 [2023-11-10 11:58:47,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:47,151 INFO L124 PetriNetUnfolderBase]: 7/345 cut-off events. [2023-11-10 11:58:47,151 INFO L125 PetriNetUnfolderBase]: For 43/85 co-relation queries the response was YES. [2023-11-10 11:58:47,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 345 events. 7/345 cut-off events. For 43/85 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1055 event pairs, 1 based on Foata normal form. 253/584 useless extension candidates. Maximal degree in co-relation 255. Up to 41 conditions per place. [2023-11-10 11:58:47,154 INFO L140 encePairwiseOnDemand]: 176/202 looper letters, 13 selfloop transitions, 2 changer transitions 25/182 dead transitions. [2023-11-10 11:58:47,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 182 transitions, 429 flow [2023-11-10 11:58:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:47,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2023-11-10 11:58:47,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8894389438943895 [2023-11-10 11:58:47,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2023-11-10 11:58:47,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2023-11-10 11:58:47,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:47,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2023-11-10 11:58:47,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,160 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,160 INFO L175 Difference]: Start difference. First operand has 183 places, 202 transitions, 431 flow. Second operand 3 states and 539 transitions. [2023-11-10 11:58:47,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 182 transitions, 429 flow [2023-11-10 11:58:47,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 182 transitions, 429 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:47,168 INFO L231 Difference]: Finished difference. Result has 185 places, 154 transitions, 336 flow [2023-11-10 11:58:47,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=185, PETRI_TRANSITIONS=154} [2023-11-10 11:58:47,170 INFO L281 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2023-11-10 11:58:47,170 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 154 transitions, 336 flow [2023-11-10 11:58:47,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:47,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:47,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-10 11:58:47,172 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:47,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:47,172 INFO L85 PathProgramCache]: Analyzing trace with hash 980104363, now seen corresponding path program 1 times [2023-11-10 11:58:47,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:47,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92205412] [2023-11-10 11:58:47,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:47,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:47,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:47,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92205412] [2023-11-10 11:58:47,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92205412] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:47,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854873653] [2023-11-10 11:58:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:47,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:47,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:47,258 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) [2023-11-10 11:58:47,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-10 11:58:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:47,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:47,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:47,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:47,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854873653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:47,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:47,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:47,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883265425] [2023-11-10 11:58:47,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:47,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:47,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:47,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:47,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:47,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 202 [2023-11-10 11:58:47,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 154 transitions, 336 flow. Second operand has 10 states, 10 states have (on average 164.4) internal successors, (1644), 10 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:47,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 202 [2023-11-10 11:58:47,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:47,550 INFO L124 PetriNetUnfolderBase]: 0/175 cut-off events. [2023-11-10 11:58:47,550 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-10 11:58:47,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 175 events. 0/175 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 275 event pairs, 0 based on Foata normal form. 2/177 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:58:47,551 INFO L140 encePairwiseOnDemand]: 196/202 looper letters, 14 selfloop transitions, 9 changer transitions 0/164 dead transitions. [2023-11-10 11:58:47,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 164 transitions, 404 flow [2023-11-10 11:58:47,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1483 transitions. [2023-11-10 11:58:47,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8157315731573157 [2023-11-10 11:58:47,554 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1483 transitions. [2023-11-10 11:58:47,554 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1483 transitions. [2023-11-10 11:58:47,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:47,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1483 transitions. [2023-11-10 11:58:47,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 164.77777777777777) internal successors, (1483), 9 states have internal predecessors, (1483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,562 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 202.0) internal successors, (2020), 10 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,562 INFO L175 Difference]: Start difference. First operand has 185 places, 154 transitions, 336 flow. Second operand 9 states and 1483 transitions. [2023-11-10 11:58:47,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 164 transitions, 404 flow [2023-11-10 11:58:47,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 164 transitions, 400 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:47,566 INFO L231 Difference]: Finished difference. Result has 173 places, 160 transitions, 382 flow [2023-11-10 11:58:47,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=382, PETRI_PLACES=173, PETRI_TRANSITIONS=160} [2023-11-10 11:58:47,567 INFO L281 CegarLoopForPetriNet]: 183 programPoint places, -10 predicate places. [2023-11-10 11:58:47,567 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 160 transitions, 382 flow [2023-11-10 11:58:47,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 164.4) internal successors, (1644), 10 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:47,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:47,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:47,773 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,SelfDestructingSolverStorable6 [2023-11-10 11:58:47,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:47,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:47,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2079485471, now seen corresponding path program 1 times [2023-11-10 11:58:47,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:47,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043374026] [2023-11-10 11:58:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:47,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:47,810 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:47,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:47,838 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:47,839 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:47,839 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:47,839 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:47,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-10 11:58:47,840 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:58:47,840 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:47,840 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-10 11:58:47,878 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-10 11:58:47,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 215 places, 239 transitions, 518 flow [2023-11-10 11:58:47,969 INFO L124 PetriNetUnfolderBase]: 81/623 cut-off events. [2023-11-10 11:58:47,969 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-10 11:58:47,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 674 conditions, 623 events. 81/623 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2501 event pairs, 6 based on Foata normal form. 0/537 useless extension candidates. Maximal degree in co-relation 432. Up to 32 conditions per place. [2023-11-10 11:58:47,980 INFO L82 GeneralOperation]: Start removeDead. Operand has 215 places, 239 transitions, 518 flow [2023-11-10 11:58:47,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 215 places, 239 transitions, 518 flow [2023-11-10 11:58:47,991 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:47,992 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:47,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:48,001 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:48,001 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:48,001 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:48,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:48,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:48,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:48,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:48,002 INFO L85 PathProgramCache]: Analyzing trace with hash 546450960, now seen corresponding path program 1 times [2023-11-10 11:58:48,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:48,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057913914] [2023-11-10 11:58:48,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:48,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:48,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057913914] [2023-11-10 11:58:48,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057913914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:48,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:48,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:48,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898346718] [2023-11-10 11:58:48,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:48,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:48,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:48,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:48,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 239 [2023-11-10 11:58:48,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 239 transitions, 518 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:48,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 239 [2023-11-10 11:58:48,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:48,171 INFO L124 PetriNetUnfolderBase]: 20/537 cut-off events. [2023-11-10 11:58:48,171 INFO L125 PetriNetUnfolderBase]: For 112/176 co-relation queries the response was YES. [2023-11-10 11:58:48,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 669 conditions, 537 events. 20/537 cut-off events. For 112/176 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2152 event pairs, 6 based on Foata normal form. 608/1121 useless extension candidates. Maximal degree in co-relation 410. Up to 76 conditions per place. [2023-11-10 11:58:48,177 INFO L140 encePairwiseOnDemand]: 207/239 looper letters, 14 selfloop transitions, 2 changer transitions 26/213 dead transitions. [2023-11-10 11:58:48,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 213 transitions, 508 flow [2023-11-10 11:58:48,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 634 transitions. [2023-11-10 11:58:48,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8842398884239888 [2023-11-10 11:58:48,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 634 transitions. [2023-11-10 11:58:48,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 634 transitions. [2023-11-10 11:58:48,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:48,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 634 transitions. [2023-11-10 11:58:48,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.33333333333334) internal successors, (634), 3 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 239.0) internal successors, (956), 4 states have internal predecessors, (956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,186 INFO L175 Difference]: Start difference. First operand has 215 places, 239 transitions, 518 flow. Second operand 3 states and 634 transitions. [2023-11-10 11:58:48,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 213 transitions, 508 flow [2023-11-10 11:58:48,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 213 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:48,189 INFO L231 Difference]: Finished difference. Result has 217 places, 184 transitions, 406 flow [2023-11-10 11:58:48,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=406, PETRI_PLACES=217, PETRI_TRANSITIONS=184} [2023-11-10 11:58:48,191 INFO L281 CegarLoopForPetriNet]: 215 programPoint places, 2 predicate places. [2023-11-10 11:58:48,191 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 184 transitions, 406 flow [2023-11-10 11:58:48,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:48,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:48,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-10 11:58:48,192 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:48,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:48,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1233702691, now seen corresponding path program 1 times [2023-11-10 11:58:48,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:48,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576964753] [2023-11-10 11:58:48,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:48,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:48,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:48,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576964753] [2023-11-10 11:58:48,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576964753] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509812592] [2023-11-10 11:58:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:48,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:48,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:48,265 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) [2023-11-10 11:58:48,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-10 11:58:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:48,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:48,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:48,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:48,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509812592] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:48,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:48,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:48,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76691233] [2023-11-10 11:58:48,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:48,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:48,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:48,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:48,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:48,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 239 [2023-11-10 11:58:48,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 184 transitions, 406 flow. Second operand has 10 states, 10 states have (on average 193.4) internal successors, (1934), 10 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:48,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 239 [2023-11-10 11:58:48,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:48,531 INFO L124 PetriNetUnfolderBase]: 0/227 cut-off events. [2023-11-10 11:58:48,532 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:58:48,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 227 events. 0/227 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 484 event pairs, 0 based on Foata normal form. 2/229 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:58:48,563 INFO L140 encePairwiseOnDemand]: 233/239 looper letters, 15 selfloop transitions, 9 changer transitions 0/194 dead transitions. [2023-11-10 11:58:48,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 194 transitions, 476 flow [2023-11-10 11:58:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:48,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:48,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1745 transitions. [2023-11-10 11:58:48,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8112505811250581 [2023-11-10 11:58:48,568 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1745 transitions. [2023-11-10 11:58:48,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1745 transitions. [2023-11-10 11:58:48,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:48,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1745 transitions. [2023-11-10 11:58:48,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 193.88888888888889) internal successors, (1745), 9 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 239.0) internal successors, (2390), 10 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,577 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 239.0) internal successors, (2390), 10 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,577 INFO L175 Difference]: Start difference. First operand has 217 places, 184 transitions, 406 flow. Second operand 9 states and 1745 transitions. [2023-11-10 11:58:48,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 194 transitions, 476 flow [2023-11-10 11:58:48,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 194 transitions, 468 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:48,580 INFO L231 Difference]: Finished difference. Result has 205 places, 190 transitions, 448 flow [2023-11-10 11:58:48,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=448, PETRI_PLACES=205, PETRI_TRANSITIONS=190} [2023-11-10 11:58:48,581 INFO L281 CegarLoopForPetriNet]: 215 programPoint places, -10 predicate places. [2023-11-10 11:58:48,581 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 190 transitions, 448 flow [2023-11-10 11:58:48,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 193.4) internal successors, (1934), 10 states have internal predecessors, (1934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:48,582 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:48,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:48,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:48,788 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:48,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:48,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1256842822, now seen corresponding path program 1 times [2023-11-10 11:58:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:48,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517763856] [2023-11-10 11:58:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:48,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517763856] [2023-11-10 11:58:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517763856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:48,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094810103] [2023-11-10 11:58:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:48,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:48,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:48,938 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) [2023-11-10 11:58:48,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-10 11:58:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:49,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:49,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:49,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094810103] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:49,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437471998] [2023-11-10 11:58:49,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:49,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:49,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 239 [2023-11-10 11:58:49,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 190 transitions, 448 flow. Second operand has 18 states, 18 states have (on average 193.66666666666666) internal successors, (3486), 18 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:49,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:49,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 239 [2023-11-10 11:58:49,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:49,361 INFO L124 PetriNetUnfolderBase]: 0/201 cut-off events. [2023-11-10 11:58:49,361 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-10 11:58:49,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 201 events. 0/201 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 329 event pairs, 0 based on Foata normal form. 2/203 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-11-10 11:58:49,362 INFO L140 encePairwiseOnDemand]: 234/239 looper letters, 15 selfloop transitions, 13 changer transitions 0/187 dead transitions. [2023-11-10 11:58:49,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 187 transitions, 510 flow [2023-11-10 11:58:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-10 11:58:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-10 11:58:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2895 transitions. [2023-11-10 11:58:49,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8075313807531381 [2023-11-10 11:58:49,368 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2895 transitions. [2023-11-10 11:58:49,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2895 transitions. [2023-11-10 11:58:49,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:49,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2895 transitions. [2023-11-10 11:58:49,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 193.0) internal successors, (2895), 15 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:49,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 239.0) internal successors, (3824), 16 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:49,383 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 239.0) internal successors, (3824), 16 states have internal predecessors, (3824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:49,383 INFO L175 Difference]: Start difference. First operand has 205 places, 190 transitions, 448 flow. Second operand 15 states and 2895 transitions. [2023-11-10 11:58:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 187 transitions, 510 flow [2023-11-10 11:58:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 187 transitions, 493 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-10 11:58:49,387 INFO L231 Difference]: Finished difference. Result has 202 places, 180 transitions, 442 flow [2023-11-10 11:58:49,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=239, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=442, PETRI_PLACES=202, PETRI_TRANSITIONS=180} [2023-11-10 11:58:49,389 INFO L281 CegarLoopForPetriNet]: 215 programPoint places, -13 predicate places. [2023-11-10 11:58:49,389 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 180 transitions, 442 flow [2023-11-10 11:58:49,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 193.66666666666666) internal successors, (3486), 18 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:49,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:49,391 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:49,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:49,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:49,596 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:49,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:49,596 INFO L85 PathProgramCache]: Analyzing trace with hash 195275532, now seen corresponding path program 1 times [2023-11-10 11:58:49,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:49,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329483368] [2023-11-10 11:58:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:49,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:49,613 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:49,636 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:49,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:49,637 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:49,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:49,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-10 11:58:49,637 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:49,638 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:49,638 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-10 11:58:49,669 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-10 11:58:49,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 276 transitions, 607 flow [2023-11-10 11:58:49,814 INFO L124 PetriNetUnfolderBase]: 140/982 cut-off events. [2023-11-10 11:58:49,815 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-10 11:58:49,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 982 events. 140/982 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4603 event pairs, 23 based on Foata normal form. 0/852 useless extension candidates. Maximal degree in co-relation 668. Up to 80 conditions per place. [2023-11-10 11:58:49,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 247 places, 276 transitions, 607 flow [2023-11-10 11:58:49,845 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 247 places, 276 transitions, 607 flow [2023-11-10 11:58:49,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:49,848 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:49,848 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:49,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:49,856 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:49,856 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:49,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:49,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:49,857 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:49,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:49,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1436815836, now seen corresponding path program 1 times [2023-11-10 11:58:49,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:49,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843913740] [2023-11-10 11:58:49,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:49,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:49,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:49,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:49,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843913740] [2023-11-10 11:58:49,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843913740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:49,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:49,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:49,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396296666] [2023-11-10 11:58:49,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:49,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:49,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:49,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:49,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:49,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 276 [2023-11-10 11:58:49,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 276 transitions, 607 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:49,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:49,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 276 [2023-11-10 11:58:49,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:50,134 INFO L124 PetriNetUnfolderBase]: 53/869 cut-off events. [2023-11-10 11:58:50,134 INFO L125 PetriNetUnfolderBase]: For 349/568 co-relation queries the response was YES. [2023-11-10 11:58:50,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1127 conditions, 869 events. 53/869 cut-off events. For 349/568 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4193 event pairs, 23 based on Foata normal form. 1343/2170 useless extension candidates. Maximal degree in co-relation 662. Up to 147 conditions per place. [2023-11-10 11:58:50,147 INFO L140 encePairwiseOnDemand]: 238/276 looper letters, 15 selfloop transitions, 2 changer transitions 27/244 dead transitions. [2023-11-10 11:58:50,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 244 transitions, 589 flow [2023-11-10 11:58:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:50,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:50,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 729 transitions. [2023-11-10 11:58:50,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8804347826086957 [2023-11-10 11:58:50,149 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 729 transitions. [2023-11-10 11:58:50,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 729 transitions. [2023-11-10 11:58:50,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:50,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 729 transitions. [2023-11-10 11:58:50,151 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.0) internal successors, (729), 3 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,153 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 276.0) internal successors, (1104), 4 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,153 INFO L175 Difference]: Start difference. First operand has 247 places, 276 transitions, 607 flow. Second operand 3 states and 729 transitions. [2023-11-10 11:58:50,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 244 transitions, 589 flow [2023-11-10 11:58:50,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 244 transitions, 589 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:50,158 INFO L231 Difference]: Finished difference. Result has 249 places, 214 transitions, 478 flow [2023-11-10 11:58:50,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=478, PETRI_PLACES=249, PETRI_TRANSITIONS=214} [2023-11-10 11:58:50,160 INFO L281 CegarLoopForPetriNet]: 247 programPoint places, 2 predicate places. [2023-11-10 11:58:50,160 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 214 transitions, 478 flow [2023-11-10 11:58:50,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:50,161 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:50,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-10 11:58:50,161 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:50,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash -975654444, now seen corresponding path program 1 times [2023-11-10 11:58:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:50,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044678314] [2023-11-10 11:58:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044678314] [2023-11-10 11:58:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044678314] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255446866] [2023-11-10 11:58:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:50,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:50,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:50,222 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) [2023-11-10 11:58:50,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-10 11:58:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:50,327 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:50,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:50,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:50,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255446866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:50,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:50,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:50,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363064928] [2023-11-10 11:58:50,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:50,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:50,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:50,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:50,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:50,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 276 [2023-11-10 11:58:50,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 214 transitions, 478 flow. Second operand has 10 states, 10 states have (on average 222.4) internal successors, (2224), 10 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:50,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 276 [2023-11-10 11:58:50,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:50,492 INFO L124 PetriNetUnfolderBase]: 0/279 cut-off events. [2023-11-10 11:58:50,492 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-10 11:58:50,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 358 conditions, 279 events. 0/279 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 689 event pairs, 0 based on Foata normal form. 2/281 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:58:50,493 INFO L140 encePairwiseOnDemand]: 270/276 looper letters, 16 selfloop transitions, 9 changer transitions 0/224 dead transitions. [2023-11-10 11:58:50,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 224 transitions, 550 flow [2023-11-10 11:58:50,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:50,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2007 transitions. [2023-11-10 11:58:50,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8079710144927537 [2023-11-10 11:58:50,498 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2007 transitions. [2023-11-10 11:58:50,498 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2007 transitions. [2023-11-10 11:58:50,499 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:50,499 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2007 transitions. [2023-11-10 11:58:50,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 223.0) internal successors, (2007), 9 states have internal predecessors, (2007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 276.0) internal successors, (2760), 10 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,507 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 276.0) internal successors, (2760), 10 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,507 INFO L175 Difference]: Start difference. First operand has 249 places, 214 transitions, 478 flow. Second operand 9 states and 2007 transitions. [2023-11-10 11:58:50,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 224 transitions, 550 flow [2023-11-10 11:58:50,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 224 transitions, 536 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:50,512 INFO L231 Difference]: Finished difference. Result has 237 places, 220 transitions, 514 flow [2023-11-10 11:58:50,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=514, PETRI_PLACES=237, PETRI_TRANSITIONS=220} [2023-11-10 11:58:50,513 INFO L281 CegarLoopForPetriNet]: 247 programPoint places, -10 predicate places. [2023-11-10 11:58:50,513 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 220 transitions, 514 flow [2023-11-10 11:58:50,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 222.4) internal successors, (2224), 10 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:50,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:50,514 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:50,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-10 11:58:50,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-10 11:58:50,720 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:50,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1107079881, now seen corresponding path program 1 times [2023-11-10 11:58:50,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:50,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049645323] [2023-11-10 11:58:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049645323] [2023-11-10 11:58:50,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049645323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:50,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493088003] [2023-11-10 11:58:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:50,866 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) [2023-11-10 11:58:50,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-10 11:58:51,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:51,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:51,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:51,058 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:51,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493088003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:51,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859802914] [2023-11-10 11:58:51,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:51,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:51,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:51,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 276 [2023-11-10 11:58:51,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 220 transitions, 514 flow. Second operand has 18 states, 18 states have (on average 222.66666666666666) internal successors, (4008), 18 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:51,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:51,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 276 [2023-11-10 11:58:51,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:51,332 INFO L124 PetriNetUnfolderBase]: 0/240 cut-off events. [2023-11-10 11:58:51,332 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-10 11:58:51,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 335 conditions, 240 events. 0/240 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 445 event pairs, 0 based on Foata normal form. 3/243 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:58:51,333 INFO L140 encePairwiseOnDemand]: 271/276 looper letters, 18 selfloop transitions, 16 changer transitions 0/222 dead transitions. [2023-11-10 11:58:51,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 222 transitions, 612 flow [2023-11-10 11:58:51,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-10 11:58:51,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-10 11:58:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3997 transitions. [2023-11-10 11:58:51,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.804549114331723 [2023-11-10 11:58:51,342 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3997 transitions. [2023-11-10 11:58:51,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3997 transitions. [2023-11-10 11:58:51,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:51,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3997 transitions. [2023-11-10 11:58:51,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 222.05555555555554) internal successors, (3997), 18 states have internal predecessors, (3997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:51,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 276.0) internal successors, (5244), 19 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:51,359 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 276.0) internal successors, (5244), 19 states have internal predecessors, (5244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:51,359 INFO L175 Difference]: Start difference. First operand has 237 places, 220 transitions, 514 flow. Second operand 18 states and 3997 transitions. [2023-11-10 11:58:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 222 transitions, 612 flow [2023-11-10 11:58:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 222 transitions, 591 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-10 11:58:51,364 INFO L231 Difference]: Finished difference. Result has 237 places, 213 transitions, 527 flow [2023-11-10 11:58:51,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=276, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=527, PETRI_PLACES=237, PETRI_TRANSITIONS=213} [2023-11-10 11:58:51,365 INFO L281 CegarLoopForPetriNet]: 247 programPoint places, -10 predicate places. [2023-11-10 11:58:51,365 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 213 transitions, 527 flow [2023-11-10 11:58:51,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 222.66666666666666) internal successors, (4008), 18 states have internal predecessors, (4008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:51,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:51,366 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:51,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:51,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-10 11:58:51,572 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:51,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:51,572 INFO L85 PathProgramCache]: Analyzing trace with hash 811541891, now seen corresponding path program 1 times [2023-11-10 11:58:51,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144097792] [2023-11-10 11:58:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:51,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:51,591 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:51,608 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:51,608 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:51,609 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:51,609 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:51,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-10 11:58:51,609 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:51,610 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:51,610 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-10 11:58:51,643 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-10 11:58:51,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 279 places, 313 transitions, 698 flow [2023-11-10 11:58:51,944 INFO L124 PetriNetUnfolderBase]: 263/1645 cut-off events. [2023-11-10 11:58:51,944 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-10 11:58:51,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1871 conditions, 1645 events. 263/1645 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 9332 event pairs, 72 based on Foata normal form. 0/1439 useless extension candidates. Maximal degree in co-relation 1081. Up to 192 conditions per place. [2023-11-10 11:58:51,968 INFO L82 GeneralOperation]: Start removeDead. Operand has 279 places, 313 transitions, 698 flow [2023-11-10 11:58:51,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 279 places, 313 transitions, 698 flow [2023-11-10 11:58:51,982 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:51,982 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:51,982 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:51,987 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:51,987 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:51,987 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:51,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:51,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:51,988 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:51,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:51,988 INFO L85 PathProgramCache]: Analyzing trace with hash 842434077, now seen corresponding path program 1 times [2023-11-10 11:58:51,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:51,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933866927] [2023-11-10 11:58:51,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:51,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:52,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:52,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933866927] [2023-11-10 11:58:52,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933866927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:52,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:52,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:52,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991668860] [2023-11-10 11:58:52,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:52,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:52,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:52,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:52,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:52,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 313 [2023-11-10 11:58:52,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 313 transitions, 698 flow. Second operand has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:52,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 313 [2023-11-10 11:58:52,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:52,442 INFO L124 PetriNetUnfolderBase]: 134/1489 cut-off events. [2023-11-10 11:58:52,443 INFO L125 PetriNetUnfolderBase]: For 666/854 co-relation queries the response was YES. [2023-11-10 11:58:52,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2018 conditions, 1489 events. 134/1489 cut-off events. For 666/854 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8896 event pairs, 72 based on Foata normal form. 2910/4323 useless extension candidates. Maximal degree in co-relation 1119. Up to 298 conditions per place. [2023-11-10 11:58:52,455 INFO L140 encePairwiseOnDemand]: 269/313 looper letters, 16 selfloop transitions, 2 changer transitions 28/275 dead transitions. [2023-11-10 11:58:52,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 275 transitions, 672 flow [2023-11-10 11:58:52,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:52,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:52,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 824 transitions. [2023-11-10 11:58:52,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8775292864749734 [2023-11-10 11:58:52,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 824 transitions. [2023-11-10 11:58:52,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 824 transitions. [2023-11-10 11:58:52,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:52,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 824 transitions. [2023-11-10 11:58:52,460 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.6666666666667) internal successors, (824), 3 states have internal predecessors, (824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,461 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,461 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 313.0) internal successors, (1252), 4 states have internal predecessors, (1252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,461 INFO L175 Difference]: Start difference. First operand has 279 places, 313 transitions, 698 flow. Second operand 3 states and 824 transitions. [2023-11-10 11:58:52,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 275 transitions, 672 flow [2023-11-10 11:58:52,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 275 transitions, 672 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:52,466 INFO L231 Difference]: Finished difference. Result has 281 places, 244 transitions, 552 flow [2023-11-10 11:58:52,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=614, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=552, PETRI_PLACES=281, PETRI_TRANSITIONS=244} [2023-11-10 11:58:52,467 INFO L281 CegarLoopForPetriNet]: 279 programPoint places, 2 predicate places. [2023-11-10 11:58:52,467 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 244 transitions, 552 flow [2023-11-10 11:58:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 251.33333333333334) internal successors, (754), 3 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:52,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:52,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-10 11:58:52,468 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:52,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:52,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1754249104, now seen corresponding path program 1 times [2023-11-10 11:58:52,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:52,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716663351] [2023-11-10 11:58:52,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:52,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:52,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:52,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:52,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:52,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716663351] [2023-11-10 11:58:52,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716663351] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:52,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232914855] [2023-11-10 11:58:52,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:52,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:52,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:52,526 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) [2023-11-10 11:58:52,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-10 11:58:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:52,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:52,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:52,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:52,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:52,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:52,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232914855] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:52,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:52,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:52,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604424594] [2023-11-10 11:58:52,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:52,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:52,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:52,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:52,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:52,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 313 [2023-11-10 11:58:52,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 244 transitions, 552 flow. Second operand has 10 states, 10 states have (on average 251.4) internal successors, (2514), 10 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:52,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 313 [2023-11-10 11:58:52,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:52,853 INFO L124 PetriNetUnfolderBase]: 0/331 cut-off events. [2023-11-10 11:58:52,854 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-10 11:58:52,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 428 conditions, 331 events. 0/331 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 896 event pairs, 0 based on Foata normal form. 2/333 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:58:52,855 INFO L140 encePairwiseOnDemand]: 307/313 looper letters, 17 selfloop transitions, 9 changer transitions 0/254 dead transitions. [2023-11-10 11:58:52,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 254 transitions, 626 flow [2023-11-10 11:58:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:52,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2269 transitions. [2023-11-10 11:58:52,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8054668086616968 [2023-11-10 11:58:52,860 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2269 transitions. [2023-11-10 11:58:52,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2269 transitions. [2023-11-10 11:58:52,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:52,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2269 transitions. [2023-11-10 11:58:52,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 252.11111111111111) internal successors, (2269), 9 states have internal predecessors, (2269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,870 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 313.0) internal successors, (3130), 10 states have internal predecessors, (3130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,870 INFO L175 Difference]: Start difference. First operand has 281 places, 244 transitions, 552 flow. Second operand 9 states and 2269 transitions. [2023-11-10 11:58:52,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 254 transitions, 626 flow [2023-11-10 11:58:52,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 254 transitions, 604 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:52,875 INFO L231 Difference]: Finished difference. Result has 269 places, 250 transitions, 580 flow [2023-11-10 11:58:52,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=269, PETRI_TRANSITIONS=250} [2023-11-10 11:58:52,875 INFO L281 CegarLoopForPetriNet]: 279 programPoint places, -10 predicate places. [2023-11-10 11:58:52,876 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 250 transitions, 580 flow [2023-11-10 11:58:52,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 251.4) internal successors, (2514), 10 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:52,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:52,877 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:52,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:53,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:53,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:53,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash 818779961, now seen corresponding path program 1 times [2023-11-10 11:58:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773765366] [2023-11-10 11:58:53,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:53,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:53,188 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:53,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:53,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773765366] [2023-11-10 11:58:53,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773765366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:53,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657980293] [2023-11-10 11:58:53,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:53,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:53,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:53,190 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:53,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-10 11:58:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:53,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:53,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:53,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:53,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657980293] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:53,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:53,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:53,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549085476] [2023-11-10 11:58:53,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:53,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 313 [2023-11-10 11:58:53,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 250 transitions, 580 flow. Second operand has 18 states, 18 states have (on average 251.66666666666666) internal successors, (4530), 18 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:53,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:53,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 313 [2023-11-10 11:58:53,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:53,649 INFO L124 PetriNetUnfolderBase]: 0/279 cut-off events. [2023-11-10 11:58:53,650 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-10 11:58:53,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 279 events. 0/279 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 561 event pairs, 0 based on Foata normal form. 4/283 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2023-11-10 11:58:53,650 INFO L140 encePairwiseOnDemand]: 308/313 looper letters, 21 selfloop transitions, 19 changer transitions 0/257 dead transitions. [2023-11-10 11:58:53,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 257 transitions, 714 flow [2023-11-10 11:58:53,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:53,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:53,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5273 transitions. [2023-11-10 11:58:53,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8022212079720067 [2023-11-10 11:58:53,661 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5273 transitions. [2023-11-10 11:58:53,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5273 transitions. [2023-11-10 11:58:53,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:53,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5273 transitions. [2023-11-10 11:58:53,670 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 251.0952380952381) internal successors, (5273), 21 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:53,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:53,682 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 313.0) internal successors, (6886), 22 states have internal predecessors, (6886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:53,682 INFO L175 Difference]: Start difference. First operand has 269 places, 250 transitions, 580 flow. Second operand 21 states and 5273 transitions. [2023-11-10 11:58:53,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 257 transitions, 714 flow [2023-11-10 11:58:53,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 257 transitions, 689 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-10 11:58:53,687 INFO L231 Difference]: Finished difference. Result has 272 places, 246 transitions, 612 flow [2023-11-10 11:58:53,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=313, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=612, PETRI_PLACES=272, PETRI_TRANSITIONS=246} [2023-11-10 11:58:53,688 INFO L281 CegarLoopForPetriNet]: 279 programPoint places, -7 predicate places. [2023-11-10 11:58:53,688 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 246 transitions, 612 flow [2023-11-10 11:58:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 251.66666666666666) internal successors, (4530), 18 states have internal predecessors, (4530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:53,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:53,689 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:53,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:53,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:53,895 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:53,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:53,896 INFO L85 PathProgramCache]: Analyzing trace with hash 377658214, now seen corresponding path program 1 times [2023-11-10 11:58:53,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:53,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997922452] [2023-11-10 11:58:53,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:53,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:53,920 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:53,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:53,944 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:53,944 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:53,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:53,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-10 11:58:53,945 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:53,947 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:53,947 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-10 11:58:53,984 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-11-10 11:58:53,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 311 places, 350 transitions, 791 flow [2023-11-10 11:58:54,507 INFO L124 PetriNetUnfolderBase]: 530/2932 cut-off events. [2023-11-10 11:58:54,507 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-11-10 11:58:54,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3423 conditions, 2932 events. 530/2932 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 20074 event pairs, 201 based on Foata normal form. 0/2586 useless extension candidates. Maximal degree in co-relation 1863. Up to 448 conditions per place. [2023-11-10 11:58:54,592 INFO L82 GeneralOperation]: Start removeDead. Operand has 311 places, 350 transitions, 791 flow [2023-11-10 11:58:54,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 311 places, 350 transitions, 791 flow [2023-11-10 11:58:54,687 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:54,687 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:54,688 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:54,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:54,692 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:54,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:54,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:54,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:54,693 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:54,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:54,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1205733893, now seen corresponding path program 1 times [2023-11-10 11:58:54,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:54,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293267088] [2023-11-10 11:58:54,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:54,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:54,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:54,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293267088] [2023-11-10 11:58:54,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293267088] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:54,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:54,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:54,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409734815] [2023-11-10 11:58:54,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:54,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:54,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:54,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:54,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:54,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 279 out of 350 [2023-11-10 11:58:54,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 350 transitions, 791 flow. Second operand has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:54,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:54,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 279 of 350 [2023-11-10 11:58:54,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:55,509 INFO L124 PetriNetUnfolderBase]: 327/2701 cut-off events. [2023-11-10 11:58:55,509 INFO L125 PetriNetUnfolderBase]: For 1540/1883 co-relation queries the response was YES. [2023-11-10 11:58:55,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3822 conditions, 2701 events. 327/2701 cut-off events. For 1540/1883 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 19586 event pairs, 201 based on Foata normal form. 6276/8835 useless extension candidates. Maximal degree in co-relation 2009. Up to 625 conditions per place. [2023-11-10 11:58:55,539 INFO L140 encePairwiseOnDemand]: 300/350 looper letters, 17 selfloop transitions, 2 changer transitions 29/306 dead transitions. [2023-11-10 11:58:55,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 306 transitions, 757 flow [2023-11-10 11:58:55,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:55,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 919 transitions. [2023-11-10 11:58:55,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8752380952380953 [2023-11-10 11:58:55,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 919 transitions. [2023-11-10 11:58:55,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 919 transitions. [2023-11-10 11:58:55,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:55,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 919 transitions. [2023-11-10 11:58:55,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 306.3333333333333) internal successors, (919), 3 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,545 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,545 INFO L175 Difference]: Start difference. First operand has 311 places, 350 transitions, 791 flow. Second operand 3 states and 919 transitions. [2023-11-10 11:58:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 306 transitions, 757 flow [2023-11-10 11:58:55,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 306 transitions, 757 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:55,551 INFO L231 Difference]: Finished difference. Result has 313 places, 274 transitions, 628 flow [2023-11-10 11:58:55,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=628, PETRI_PLACES=313, PETRI_TRANSITIONS=274} [2023-11-10 11:58:55,553 INFO L281 CegarLoopForPetriNet]: 311 programPoint places, 2 predicate places. [2023-11-10 11:58:55,553 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 274 transitions, 628 flow [2023-11-10 11:58:55,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 280.3333333333333) internal successors, (841), 3 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:55,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:55,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-10 11:58:55,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:55,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1633926639, now seen corresponding path program 1 times [2023-11-10 11:58:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:55,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112291838] [2023-11-10 11:58:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:55,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:55,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:55,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112291838] [2023-11-10 11:58:55,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112291838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:55,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54333649] [2023-11-10 11:58:55,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:55,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:55,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:55,617 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:55,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-10 11:58:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:55,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:55,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:55,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:55,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54333649] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:55,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:55,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:55,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415943344] [2023-11-10 11:58:55,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:55,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:55,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:55,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:55,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:55,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 350 [2023-11-10 11:58:55,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 274 transitions, 628 flow. Second operand has 10 states, 10 states have (on average 280.4) internal successors, (2804), 10 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:55,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 350 [2023-11-10 11:58:55,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:55,944 INFO L124 PetriNetUnfolderBase]: 0/383 cut-off events. [2023-11-10 11:58:55,944 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-10 11:58:55,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499 conditions, 383 events. 0/383 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1100 event pairs, 0 based on Foata normal form. 2/385 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2023-11-10 11:58:55,945 INFO L140 encePairwiseOnDemand]: 344/350 looper letters, 18 selfloop transitions, 9 changer transitions 0/284 dead transitions. [2023-11-10 11:58:55,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 284 transitions, 704 flow [2023-11-10 11:58:55,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:55,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2531 transitions. [2023-11-10 11:58:55,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8034920634920635 [2023-11-10 11:58:55,950 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2531 transitions. [2023-11-10 11:58:55,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2531 transitions. [2023-11-10 11:58:55,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:55,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2531 transitions. [2023-11-10 11:58:55,956 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 281.22222222222223) internal successors, (2531), 9 states have internal predecessors, (2531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,960 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,960 INFO L175 Difference]: Start difference. First operand has 313 places, 274 transitions, 628 flow. Second operand 9 states and 2531 transitions. [2023-11-10 11:58:55,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 284 transitions, 704 flow [2023-11-10 11:58:55,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 284 transitions, 672 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:55,965 INFO L231 Difference]: Finished difference. Result has 301 places, 280 transitions, 646 flow [2023-11-10 11:58:55,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=646, PETRI_PLACES=301, PETRI_TRANSITIONS=280} [2023-11-10 11:58:55,965 INFO L281 CegarLoopForPetriNet]: 311 programPoint places, -10 predicate places. [2023-11-10 11:58:55,966 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 280 transitions, 646 flow [2023-11-10 11:58:55,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 280.4) internal successors, (2804), 10 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:55,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:55,967 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:55,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:56,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:56,172 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:56,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash 225769408, now seen corresponding path program 1 times [2023-11-10 11:58:56,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:56,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265159220] [2023-11-10 11:58:56,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:56,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:56,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:56,269 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265159220] [2023-11-10 11:58:56,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265159220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:56,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223582834] [2023-11-10 11:58:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:56,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:56,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:56,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:56,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-10 11:58:56,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:56,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:56,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:56,464 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:56,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223582834] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:56,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:56,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:56,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930685998] [2023-11-10 11:58:56,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:56,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:56,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:56,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:56,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:56,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 350 [2023-11-10 11:58:56,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 280 transitions, 646 flow. Second operand has 18 states, 18 states have (on average 280.6666666666667) internal successors, (5052), 18 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:56,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:56,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 350 [2023-11-10 11:58:56,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:56,826 INFO L124 PetriNetUnfolderBase]: 0/331 cut-off events. [2023-11-10 11:58:56,826 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-10 11:58:56,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 331 events. 0/331 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 739 event pairs, 0 based on Foata normal form. 4/335 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:58:56,827 INFO L140 encePairwiseOnDemand]: 344/350 looper letters, 26 selfloop transitions, 21 changer transitions 0/304 dead transitions. [2023-11-10 11:58:56,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 304 transitions, 848 flow [2023-11-10 11:58:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:56,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5889 transitions. [2023-11-10 11:58:56,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8012244897959183 [2023-11-10 11:58:56,835 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5889 transitions. [2023-11-10 11:58:56,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5889 transitions. [2023-11-10 11:58:56,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:56,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5889 transitions. [2023-11-10 11:58:56,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 280.42857142857144) internal successors, (5889), 21 states have internal predecessors, (5889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:56,857 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 350.0) internal successors, (7700), 22 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:56,859 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 350.0) internal successors, (7700), 22 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:56,859 INFO L175 Difference]: Start difference. First operand has 301 places, 280 transitions, 646 flow. Second operand 21 states and 5889 transitions. [2023-11-10 11:58:56,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 304 transitions, 848 flow [2023-11-10 11:58:56,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 304 transitions, 834 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:56,865 INFO L231 Difference]: Finished difference. Result has 325 places, 293 transitions, 770 flow [2023-11-10 11:58:56,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=640, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=770, PETRI_PLACES=325, PETRI_TRANSITIONS=293} [2023-11-10 11:58:56,867 INFO L281 CegarLoopForPetriNet]: 311 programPoint places, 14 predicate places. [2023-11-10 11:58:56,867 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 293 transitions, 770 flow [2023-11-10 11:58:56,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 280.6666666666667) internal successors, (5052), 18 states have internal predecessors, (5052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:56,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:56,868 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:56,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:57,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-10 11:58:57,073 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:57,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:57,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1699256619, now seen corresponding path program 1 times [2023-11-10 11:58:57,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:57,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996475082] [2023-11-10 11:58:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:57,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:57,098 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:57,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:57,122 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:57,123 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:57,123 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:57,123 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:57,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-10 11:58:57,123 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:57,124 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:57,124 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-10 11:58:57,169 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-10 11:58:57,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 343 places, 387 transitions, 886 flow [2023-11-10 11:58:58,350 INFO L124 PetriNetUnfolderBase]: 1117/5499 cut-off events. [2023-11-10 11:58:58,350 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-11-10 11:58:58,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6576 conditions, 5499 events. 1117/5499 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 45178 event pairs, 522 based on Foata normal form. 0/4885 useless extension candidates. Maximal degree in co-relation 3414. Up to 1024 conditions per place. [2023-11-10 11:58:58,446 INFO L82 GeneralOperation]: Start removeDead. Operand has 343 places, 387 transitions, 886 flow [2023-11-10 11:58:58,507 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 343 places, 387 transitions, 886 flow [2023-11-10 11:58:58,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:58,508 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:58,508 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:58,513 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:58,513 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:58:58,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:58,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:58,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:58,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:58,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:58,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1008614846, now seen corresponding path program 1 times [2023-11-10 11:58:58,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743404568] [2023-11-10 11:58:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:58,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:58,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:58,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743404568] [2023-11-10 11:58:58,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743404568] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:58,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:58,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:58,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038160934] [2023-11-10 11:58:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:58,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:58,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:58,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:58,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:58,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 308 out of 387 [2023-11-10 11:58:58,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 387 transitions, 886 flow. Second operand has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:58,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:58,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 308 of 387 [2023-11-10 11:58:58,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:59,829 INFO L124 PetriNetUnfolderBase]: 776/5129 cut-off events. [2023-11-10 11:58:59,829 INFO L125 PetriNetUnfolderBase]: For 3184/3336 co-relation queries the response was YES. [2023-11-10 11:58:59,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7547 conditions, 5129 events. 776/5129 cut-off events. For 3184/3336 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 43444 event pairs, 522 based on Foata normal form. 13585/18442 useless extension candidates. Maximal degree in co-relation 3812. Up to 1336 conditions per place. [2023-11-10 11:58:59,875 INFO L140 encePairwiseOnDemand]: 331/387 looper letters, 18 selfloop transitions, 2 changer transitions 30/337 dead transitions. [2023-11-10 11:58:59,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 337 transitions, 844 flow [2023-11-10 11:58:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:59,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:59,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1014 transitions. [2023-11-10 11:58:59,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8733850129198967 [2023-11-10 11:58:59,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1014 transitions. [2023-11-10 11:58:59,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1014 transitions. [2023-11-10 11:58:59,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:59,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1014 transitions. [2023-11-10 11:58:59,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 338.0) internal successors, (1014), 3 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:59,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 387.0) internal successors, (1548), 4 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:59,881 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 387.0) internal successors, (1548), 4 states have internal predecessors, (1548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:59,882 INFO L175 Difference]: Start difference. First operand has 343 places, 387 transitions, 886 flow. Second operand 3 states and 1014 transitions. [2023-11-10 11:58:59,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 337 transitions, 844 flow [2023-11-10 11:58:59,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 337 transitions, 844 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:59,887 INFO L231 Difference]: Finished difference. Result has 345 places, 304 transitions, 706 flow [2023-11-10 11:58:59,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=387, PETRI_DIFFERENCE_MINUEND_FLOW=778, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=706, PETRI_PLACES=345, PETRI_TRANSITIONS=304} [2023-11-10 11:58:59,888 INFO L281 CegarLoopForPetriNet]: 343 programPoint places, 2 predicate places. [2023-11-10 11:58:59,888 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 304 transitions, 706 flow [2023-11-10 11:58:59,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 309.3333333333333) internal successors, (928), 3 states have internal predecessors, (928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:59,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:59,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:59,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-10 11:58:59,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:59,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:59,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1744720215, now seen corresponding path program 1 times [2023-11-10 11:58:59,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:59,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627956578] [2023-11-10 11:58:59,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:59,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:59,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:59,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:59,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627956578] [2023-11-10 11:58:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627956578] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:59,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218814431] [2023-11-10 11:58:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:59,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:59,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:59,933 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:59,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-10 11:59:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:00,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:59:00,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:00,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:00,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:00,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218814431] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:00,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:59:00,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129244914] [2023-11-10 11:59:00,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:00,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:59:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:00,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:59:00,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:59:00,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 387 [2023-11-10 11:59:00,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 304 transitions, 706 flow. Second operand has 10 states, 10 states have (on average 309.4) internal successors, (3094), 10 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:00,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 387 [2023-11-10 11:59:00,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:00,292 INFO L124 PetriNetUnfolderBase]: 0/435 cut-off events. [2023-11-10 11:59:00,292 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:59:00,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 571 conditions, 435 events. 0/435 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1316 event pairs, 0 based on Foata normal form. 2/437 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2023-11-10 11:59:00,296 INFO L140 encePairwiseOnDemand]: 381/387 looper letters, 19 selfloop transitions, 9 changer transitions 0/314 dead transitions. [2023-11-10 11:59:00,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 314 transitions, 784 flow [2023-11-10 11:59:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:59:00,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:59:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2793 transitions. [2023-11-10 11:59:00,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.801894918173988 [2023-11-10 11:59:00,299 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2793 transitions. [2023-11-10 11:59:00,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2793 transitions. [2023-11-10 11:59:00,300 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:00,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2793 transitions. [2023-11-10 11:59:00,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 310.3333333333333) internal successors, (2793), 9 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 387.0) internal successors, (3870), 10 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,308 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 387.0) internal successors, (3870), 10 states have internal predecessors, (3870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,309 INFO L175 Difference]: Start difference. First operand has 345 places, 304 transitions, 706 flow. Second operand 9 states and 2793 transitions. [2023-11-10 11:59:00,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 314 transitions, 784 flow [2023-11-10 11:59:00,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 314 transitions, 740 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:00,314 INFO L231 Difference]: Finished difference. Result has 333 places, 310 transitions, 712 flow [2023-11-10 11:59:00,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=387, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=712, PETRI_PLACES=333, PETRI_TRANSITIONS=310} [2023-11-10 11:59:00,315 INFO L281 CegarLoopForPetriNet]: 343 programPoint places, -10 predicate places. [2023-11-10 11:59:00,316 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 310 transitions, 712 flow [2023-11-10 11:59:00,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 309.4) internal successors, (3094), 10 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:00,316 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:00,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:00,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-10 11:59:00,521 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:00,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:00,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1408855756, now seen corresponding path program 1 times [2023-11-10 11:59:00,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:00,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661100478] [2023-11-10 11:59:00,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:00,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:00,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661100478] [2023-11-10 11:59:00,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661100478] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:00,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449718005] [2023-11-10 11:59:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:00,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:00,625 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:00,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-10 11:59:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:00,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:59:00,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:00,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449718005] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:00,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:00,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:59:00,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134683188] [2023-11-10 11:59:00,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:59:00,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:00,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:59:00,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:59:00,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 387 [2023-11-10 11:59:00,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 310 transitions, 712 flow. Second operand has 18 states, 18 states have (on average 309.6666666666667) internal successors, (5574), 18 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:00,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 387 [2023-11-10 11:59:00,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:01,214 INFO L124 PetriNetUnfolderBase]: 0/383 cut-off events. [2023-11-10 11:59:01,214 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-10 11:59:01,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 383 events. 0/383 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 945 event pairs, 0 based on Foata normal form. 4/387 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2023-11-10 11:59:01,215 INFO L140 encePairwiseOnDemand]: 381/387 looper letters, 27 selfloop transitions, 21 changer transitions 0/334 dead transitions. [2023-11-10 11:59:01,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 334 transitions, 916 flow [2023-11-10 11:59:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:59:01,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:59:01,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6499 transitions. [2023-11-10 11:59:01,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7996800787498461 [2023-11-10 11:59:01,224 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6499 transitions. [2023-11-10 11:59:01,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6499 transitions. [2023-11-10 11:59:01,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:01,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6499 transitions. [2023-11-10 11:59:01,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 309.4761904761905) internal successors, (6499), 21 states have internal predecessors, (6499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:01,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 387.0) internal successors, (8514), 22 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:01,245 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 387.0) internal successors, (8514), 22 states have internal predecessors, (8514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:01,245 INFO L175 Difference]: Start difference. First operand has 333 places, 310 transitions, 712 flow. Second operand 21 states and 6499 transitions. [2023-11-10 11:59:01,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 334 transitions, 916 flow [2023-11-10 11:59:01,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 334 transitions, 902 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:01,251 INFO L231 Difference]: Finished difference. Result has 357 places, 323 transitions, 836 flow [2023-11-10 11:59:01,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=387, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=836, PETRI_PLACES=357, PETRI_TRANSITIONS=323} [2023-11-10 11:59:01,252 INFO L281 CegarLoopForPetriNet]: 343 programPoint places, 14 predicate places. [2023-11-10 11:59:01,253 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 323 transitions, 836 flow [2023-11-10 11:59:01,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 309.6666666666667) internal successors, (5574), 18 states have internal predecessors, (5574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:01,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:01,254 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:01,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:01,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-10 11:59:01,459 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:01,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:01,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1983397826, now seen corresponding path program 1 times [2023-11-10 11:59:01,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:01,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285819998] [2023-11-10 11:59:01,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:01,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:01,736 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:01,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:01,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285819998] [2023-11-10 11:59:01,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285819998] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:01,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986190523] [2023-11-10 11:59:01,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:01,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:01,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:01,738 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:01,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-10 11:59:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:01,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:59:01,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:02,007 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:02,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:02,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986190523] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:02,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:02,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:59:02,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864981471] [2023-11-10 11:59:02,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:02,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:59:02,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:59:02,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:59:02,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 307 out of 387 [2023-11-10 11:59:02,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 323 transitions, 836 flow. Second operand has 34 states, 34 states have (on average 309.8235294117647) internal successors, (10534), 34 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:02,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:02,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 307 of 387 [2023-11-10 11:59:02,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:02,617 INFO L124 PetriNetUnfolderBase]: 0/357 cut-off events. [2023-11-10 11:59:02,617 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:59:02,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 539 conditions, 357 events. 0/357 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 793 event pairs, 0 based on Foata normal form. 2/359 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2023-11-10 11:59:02,618 INFO L140 encePairwiseOnDemand]: 382/387 looper letters, 27 selfloop transitions, 25 changer transitions 0/327 dead transitions. [2023-11-10 11:59:02,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 327 transitions, 980 flow [2023-11-10 11:59:02,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-10 11:59:02,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-10 11:59:02,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 8343 transitions. [2023-11-10 11:59:02,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7984496124031008 [2023-11-10 11:59:02,626 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 8343 transitions. [2023-11-10 11:59:02,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 8343 transitions. [2023-11-10 11:59:02,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:02,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 8343 transitions. [2023-11-10 11:59:02,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 309.0) internal successors, (8343), 27 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:02,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 387.0) internal successors, (10836), 28 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:02,647 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 387.0) internal successors, (10836), 28 states have internal predecessors, (10836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:02,647 INFO L175 Difference]: Start difference. First operand has 357 places, 323 transitions, 836 flow. Second operand 27 states and 8343 transitions. [2023-11-10 11:59:02,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 327 transitions, 980 flow [2023-11-10 11:59:02,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 327 transitions, 926 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-10 11:59:02,654 INFO L231 Difference]: Finished difference. Result has 357 places, 313 transitions, 819 flow [2023-11-10 11:59:02,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=387, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=819, PETRI_PLACES=357, PETRI_TRANSITIONS=313} [2023-11-10 11:59:02,654 INFO L281 CegarLoopForPetriNet]: 343 programPoint places, 14 predicate places. [2023-11-10 11:59:02,654 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 313 transitions, 819 flow [2023-11-10 11:59:02,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 309.8235294117647) internal successors, (10534), 34 states have internal predecessors, (10534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:02,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:02,656 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:02,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:02,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-10 11:59:02,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:02,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash -847666704, now seen corresponding path program 1 times [2023-11-10 11:59:02,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:02,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428907150] [2023-11-10 11:59:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:02,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:02,884 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:59:02,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:02,911 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:59:02,911 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:59:02,911 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:59:02,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:59:02,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-10 11:59:02,912 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:59:02,912 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:59:02,912 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-10 11:59:02,950 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-11-10 11:59:02,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 375 places, 424 transitions, 983 flow [2023-11-10 11:59:05,422 INFO L124 PetriNetUnfolderBase]: 2408/10690 cut-off events. [2023-11-10 11:59:05,422 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-11-10 11:59:05,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 10690 events. 2408/10690 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 101064 event pairs, 1291 based on Foata normal form. 0/9552 useless extension candidates. Maximal degree in co-relation 6566. Up to 2304 conditions per place. [2023-11-10 11:59:05,584 INFO L82 GeneralOperation]: Start removeDead. Operand has 375 places, 424 transitions, 983 flow [2023-11-10 11:59:05,698 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 375 places, 424 transitions, 983 flow [2023-11-10 11:59:05,699 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:59:05,699 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:59:05,699 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:59:05,703 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:59:05,703 INFO L124 PetriNetUnfolderBase]: 3/87 cut-off events. [2023-11-10 11:59:05,703 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:59:05,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:05,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:05,704 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:05,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:05,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1104454298, now seen corresponding path program 1 times [2023-11-10 11:59:05,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:05,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338473114] [2023-11-10 11:59:05,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:05,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:05,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:05,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338473114] [2023-11-10 11:59:05,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338473114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:59:05,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:59:05,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:59:05,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970889122] [2023-11-10 11:59:05,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:59:05,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:59:05,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:05,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:59:05,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:59:05,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 337 out of 424 [2023-11-10 11:59:05,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 424 transitions, 983 flow. Second operand has 3 states, 3 states have (on average 338.3333333333333) internal successors, (1015), 3 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:05,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:05,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 337 of 424 [2023-11-10 11:59:05,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:08,401 INFO L124 PetriNetUnfolderBase]: 1801/10053 cut-off events. [2023-11-10 11:59:08,402 INFO L125 PetriNetUnfolderBase]: For 7101/7328 co-relation queries the response was YES. [2023-11-10 11:59:08,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15305 conditions, 10053 events. 1801/10053 cut-off events. For 7101/7328 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 98414 event pairs, 1291 based on Foata normal form. 29515/39038 useless extension candidates. Maximal degree in co-relation 7536. Up to 2879 conditions per place. [2023-11-10 11:59:08,492 INFO L140 encePairwiseOnDemand]: 362/424 looper letters, 19 selfloop transitions, 2 changer transitions 31/368 dead transitions. [2023-11-10 11:59:08,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 368 transitions, 933 flow [2023-11-10 11:59:08,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:59:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:59:08,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1109 transitions. [2023-11-10 11:59:08,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8718553459119497 [2023-11-10 11:59:08,495 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1109 transitions. [2023-11-10 11:59:08,495 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1109 transitions. [2023-11-10 11:59:08,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:08,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1109 transitions. [2023-11-10 11:59:08,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 369.6666666666667) internal successors, (1109), 3 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,498 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 424.0) internal successors, (1696), 4 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,498 INFO L175 Difference]: Start difference. First operand has 375 places, 424 transitions, 983 flow. Second operand 3 states and 1109 transitions. [2023-11-10 11:59:08,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 368 transitions, 933 flow [2023-11-10 11:59:08,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 368 transitions, 933 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:59:08,506 INFO L231 Difference]: Finished difference. Result has 377 places, 334 transitions, 786 flow [2023-11-10 11:59:08,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=786, PETRI_PLACES=377, PETRI_TRANSITIONS=334} [2023-11-10 11:59:08,507 INFO L281 CegarLoopForPetriNet]: 375 programPoint places, 2 predicate places. [2023-11-10 11:59:08,507 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 334 transitions, 786 flow [2023-11-10 11:59:08,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 338.3333333333333) internal successors, (1015), 3 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:08,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:08,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-10 11:59:08,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:08,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:08,509 INFO L85 PathProgramCache]: Analyzing trace with hash -994712222, now seen corresponding path program 1 times [2023-11-10 11:59:08,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:08,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193801793] [2023-11-10 11:59:08,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:08,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:08,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:08,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193801793] [2023-11-10 11:59:08,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193801793] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:08,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425809987] [2023-11-10 11:59:08,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:08,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:08,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:08,554 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:08,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-10 11:59:08,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:08,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:59:08,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:08,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425809987] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:08,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:59:08,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334498718] [2023-11-10 11:59:08,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:08,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:59:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:08,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:59:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:59:08,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 424 [2023-11-10 11:59:08,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 334 transitions, 786 flow. Second operand has 10 states, 10 states have (on average 338.4) internal successors, (3384), 10 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:08,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 424 [2023-11-10 11:59:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:08,939 INFO L124 PetriNetUnfolderBase]: 0/487 cut-off events. [2023-11-10 11:59:08,940 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-10 11:59:08,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 644 conditions, 487 events. 0/487 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1517 event pairs, 0 based on Foata normal form. 2/489 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2023-11-10 11:59:08,941 INFO L140 encePairwiseOnDemand]: 418/424 looper letters, 20 selfloop transitions, 9 changer transitions 0/344 dead transitions. [2023-11-10 11:59:08,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 344 transitions, 866 flow [2023-11-10 11:59:08,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:59:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:59:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3055 transitions. [2023-11-10 11:59:08,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8005765199161425 [2023-11-10 11:59:08,944 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3055 transitions. [2023-11-10 11:59:08,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3055 transitions. [2023-11-10 11:59:08,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:08,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3055 transitions. [2023-11-10 11:59:08,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 339.44444444444446) internal successors, (3055), 9 states have internal predecessors, (3055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 424.0) internal successors, (4240), 10 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,951 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 424.0) internal successors, (4240), 10 states have internal predecessors, (4240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,951 INFO L175 Difference]: Start difference. First operand has 377 places, 334 transitions, 786 flow. Second operand 9 states and 3055 transitions. [2023-11-10 11:59:08,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 344 transitions, 866 flow [2023-11-10 11:59:08,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 344 transitions, 808 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:08,957 INFO L231 Difference]: Finished difference. Result has 365 places, 340 transitions, 778 flow [2023-11-10 11:59:08,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=778, PETRI_PLACES=365, PETRI_TRANSITIONS=340} [2023-11-10 11:59:08,958 INFO L281 CegarLoopForPetriNet]: 375 programPoint places, -10 predicate places. [2023-11-10 11:59:08,958 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 340 transitions, 778 flow [2023-11-10 11:59:08,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 338.4) internal successors, (3384), 10 states have internal predecessors, (3384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:08,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:08,959 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:08,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:09,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:09,165 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:09,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash 73071709, now seen corresponding path program 1 times [2023-11-10 11:59:09,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:09,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993317935] [2023-11-10 11:59:09,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:09,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:09,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:09,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993317935] [2023-11-10 11:59:09,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993317935] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:09,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996830800] [2023-11-10 11:59:09,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:09,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:09,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:09,257 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:09,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-10 11:59:09,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:09,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:59:09,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:09,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:09,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996830800] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:09,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:09,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:59:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026891123] [2023-11-10 11:59:09,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:09,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:59:09,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:09,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:59:09,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:59:09,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 424 [2023-11-10 11:59:09,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 340 transitions, 778 flow. Second operand has 18 states, 18 states have (on average 338.6666666666667) internal successors, (6096), 18 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:09,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:09,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 424 [2023-11-10 11:59:09,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:10,044 INFO L124 PetriNetUnfolderBase]: 0/435 cut-off events. [2023-11-10 11:59:10,044 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-10 11:59:10,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 435 events. 0/435 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1151 event pairs, 0 based on Foata normal form. 4/439 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:59:10,045 INFO L140 encePairwiseOnDemand]: 418/424 looper letters, 28 selfloop transitions, 21 changer transitions 0/364 dead transitions. [2023-11-10 11:59:10,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 364 transitions, 984 flow [2023-11-10 11:59:10,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:59:10,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:59:10,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7109 transitions. [2023-11-10 11:59:10,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7984052111410602 [2023-11-10 11:59:10,055 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7109 transitions. [2023-11-10 11:59:10,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7109 transitions. [2023-11-10 11:59:10,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:10,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7109 transitions. [2023-11-10 11:59:10,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 338.5238095238095) internal successors, (7109), 21 states have internal predecessors, (7109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:10,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 424.0) internal successors, (9328), 22 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:10,074 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 424.0) internal successors, (9328), 22 states have internal predecessors, (9328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:10,074 INFO L175 Difference]: Start difference. First operand has 365 places, 340 transitions, 778 flow. Second operand 21 states and 7109 transitions. [2023-11-10 11:59:10,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 364 transitions, 984 flow [2023-11-10 11:59:10,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 364 transitions, 970 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:10,081 INFO L231 Difference]: Finished difference. Result has 389 places, 353 transitions, 902 flow [2023-11-10 11:59:10,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=772, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=902, PETRI_PLACES=389, PETRI_TRANSITIONS=353} [2023-11-10 11:59:10,081 INFO L281 CegarLoopForPetriNet]: 375 programPoint places, 14 predicate places. [2023-11-10 11:59:10,082 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 353 transitions, 902 flow [2023-11-10 11:59:10,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 338.6666666666667) internal successors, (6096), 18 states have internal predecessors, (6096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:10,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:10,083 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:10,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:10,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:10,290 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:10,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash -2031008929, now seen corresponding path program 1 times [2023-11-10 11:59:10,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:10,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825252148] [2023-11-10 11:59:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:10,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:10,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825252148] [2023-11-10 11:59:10,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825252148] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:10,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080119453] [2023-11-10 11:59:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:10,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:10,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:10,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:10,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-10 11:59:10,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:10,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:59:10,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:10,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:11,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080119453] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:11,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:11,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:59:11,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751164293] [2023-11-10 11:59:11,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:11,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:59:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:59:11,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:59:11,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 336 out of 424 [2023-11-10 11:59:11,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 353 transitions, 902 flow. Second operand has 34 states, 34 states have (on average 338.8235294117647) internal successors, (11520), 34 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:11,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:11,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 336 of 424 [2023-11-10 11:59:11,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:11,608 INFO L124 PetriNetUnfolderBase]: 0/396 cut-off events. [2023-11-10 11:59:11,608 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-10 11:59:11,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600 conditions, 396 events. 0/396 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 909 event pairs, 0 based on Foata normal form. 3/399 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:59:11,609 INFO L140 encePairwiseOnDemand]: 419/424 looper letters, 30 selfloop transitions, 28 changer transitions 0/362 dead transitions. [2023-11-10 11:59:11,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 362 transitions, 1092 flow [2023-11-10 11:59:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-10 11:59:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-10 11:59:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 10141 transitions. [2023-11-10 11:59:11,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.797248427672956 [2023-11-10 11:59:11,620 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 10141 transitions. [2023-11-10 11:59:11,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 10141 transitions. [2023-11-10 11:59:11,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:11,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 10141 transitions. [2023-11-10 11:59:11,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 338.03333333333336) internal successors, (10141), 30 states have internal predecessors, (10141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:11,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 424.0) internal successors, (13144), 31 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:11,647 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 424.0) internal successors, (13144), 31 states have internal predecessors, (13144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:11,647 INFO L175 Difference]: Start difference. First operand has 389 places, 353 transitions, 902 flow. Second operand 30 states and 10141 transitions. [2023-11-10 11:59:11,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 362 transitions, 1092 flow [2023-11-10 11:59:11,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 362 transitions, 1032 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-10 11:59:11,655 INFO L231 Difference]: Finished difference. Result has 392 places, 346 transitions, 909 flow [2023-11-10 11:59:11,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=424, PETRI_DIFFERENCE_MINUEND_FLOW=817, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=909, PETRI_PLACES=392, PETRI_TRANSITIONS=346} [2023-11-10 11:59:11,655 INFO L281 CegarLoopForPetriNet]: 375 programPoint places, 17 predicate places. [2023-11-10 11:59:11,655 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 346 transitions, 909 flow [2023-11-10 11:59:11,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 338.8235294117647) internal successors, (11520), 34 states have internal predecessors, (11520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:11,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:11,657 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:11,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-10 11:59:11,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:11,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:11,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1224464681, now seen corresponding path program 1 times [2023-11-10 11:59:11,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:11,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265443505] [2023-11-10 11:59:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:11,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:11,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:59:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:11,930 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:59:11,931 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:59:11,931 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:59:11,931 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:59:11,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-10 11:59:11,932 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:59:11,933 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:59:11,933 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-11-10 11:59:11,974 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-10 11:59:11,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 407 places, 461 transitions, 1082 flow [2023-11-10 11:59:17,188 INFO L124 PetriNetUnfolderBase]: 5235/21257 cut-off events. [2023-11-10 11:59:17,188 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-11-10 11:59:17,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26453 conditions, 21257 events. 5235/21257 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 229131 event pairs, 3084 based on Foata normal form. 0/19083 useless extension candidates. Maximal degree in co-relation 13047. Up to 5120 conditions per place. [2023-11-10 11:59:17,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 407 places, 461 transitions, 1082 flow [2023-11-10 11:59:17,892 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 407 places, 461 transitions, 1082 flow [2023-11-10 11:59:17,892 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:59:17,893 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:59:17,893 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:59:17,897 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:59:17,897 INFO L124 PetriNetUnfolderBase]: 3/92 cut-off events. [2023-11-10 11:59:17,897 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:59:17,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:17,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:17,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:17,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1044993267, now seen corresponding path program 1 times [2023-11-10 11:59:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953170605] [2023-11-10 11:59:17,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:17,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:17,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:17,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953170605] [2023-11-10 11:59:17,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953170605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:59:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:59:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:59:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600808729] [2023-11-10 11:59:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:59:17,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:59:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:17,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:59:17,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:59:17,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 461 [2023-11-10 11:59:17,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 461 transitions, 1082 flow. Second operand has 3 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:17,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:17,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 461 [2023-11-10 11:59:17,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:23,760 INFO L124 PetriNetUnfolderBase]: 4106/20097 cut-off events. [2023-11-10 11:59:23,761 INFO L125 PetriNetUnfolderBase]: For 15729/16218 co-relation queries the response was YES. [2023-11-10 11:59:23,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31512 conditions, 20097 events. 4106/20097 cut-off events. For 15729/16218 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 221955 event pairs, 3084 based on Foata normal form. 64175/83228 useless extension candidates. Maximal degree in co-relation 15293. Up to 6214 conditions per place. [2023-11-10 11:59:23,977 INFO L140 encePairwiseOnDemand]: 393/461 looper letters, 20 selfloop transitions, 2 changer transitions 32/399 dead transitions. [2023-11-10 11:59:23,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 399 transitions, 1024 flow [2023-11-10 11:59:23,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:59:23,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:59:23,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1204 transitions. [2023-11-10 11:59:23,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8705712219812003 [2023-11-10 11:59:23,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1204 transitions. [2023-11-10 11:59:23,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1204 transitions. [2023-11-10 11:59:23,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:23,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1204 transitions. [2023-11-10 11:59:23,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 401.3333333333333) internal successors, (1204), 3 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:23,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 461.0) internal successors, (1844), 4 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:23,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 461.0) internal successors, (1844), 4 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:23,981 INFO L175 Difference]: Start difference. First operand has 407 places, 461 transitions, 1082 flow. Second operand 3 states and 1204 transitions. [2023-11-10 11:59:23,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 399 transitions, 1024 flow [2023-11-10 11:59:23,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 399 transitions, 1024 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:59:23,990 INFO L231 Difference]: Finished difference. Result has 409 places, 364 transitions, 868 flow [2023-11-10 11:59:23,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=461, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=868, PETRI_PLACES=409, PETRI_TRANSITIONS=364} [2023-11-10 11:59:23,991 INFO L281 CegarLoopForPetriNet]: 407 programPoint places, 2 predicate places. [2023-11-10 11:59:23,991 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 364 transitions, 868 flow [2023-11-10 11:59:23,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 367.3333333333333) internal successors, (1102), 3 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:23,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:23,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:23,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-10 11:59:23,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:23,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:23,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1262289358, now seen corresponding path program 1 times [2023-11-10 11:59:23,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:23,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504255688] [2023-11-10 11:59:23,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:23,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:24,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:24,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:24,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:24,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504255688] [2023-11-10 11:59:24,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504255688] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:24,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968657932] [2023-11-10 11:59:24,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:24,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:24,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:24,041 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:24,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-10 11:59:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:24,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:59:24,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:24,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:24,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:24,288 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:24,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968657932] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:24,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:59:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511726941] [2023-11-10 11:59:24,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:59:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:59:24,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:59:24,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 461 [2023-11-10 11:59:24,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 364 transitions, 868 flow. Second operand has 10 states, 10 states have (on average 367.4) internal successors, (3674), 10 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:24,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:24,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 461 [2023-11-10 11:59:24,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:24,444 INFO L124 PetriNetUnfolderBase]: 0/539 cut-off events. [2023-11-10 11:59:24,445 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-11-10 11:59:24,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 718 conditions, 539 events. 0/539 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1729 event pairs, 0 based on Foata normal form. 2/541 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2023-11-10 11:59:24,446 INFO L140 encePairwiseOnDemand]: 455/461 looper letters, 21 selfloop transitions, 9 changer transitions 0/374 dead transitions. [2023-11-10 11:59:24,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 374 transitions, 950 flow [2023-11-10 11:59:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:59:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:59:24,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3317 transitions. [2023-11-10 11:59:24,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.799469751747409 [2023-11-10 11:59:24,455 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3317 transitions. [2023-11-10 11:59:24,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3317 transitions. [2023-11-10 11:59:24,456 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:24,456 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3317 transitions. [2023-11-10 11:59:24,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 368.55555555555554) internal successors, (3317), 9 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:24,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 461.0) internal successors, (4610), 10 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:24,466 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 461.0) internal successors, (4610), 10 states have internal predecessors, (4610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:24,466 INFO L175 Difference]: Start difference. First operand has 409 places, 364 transitions, 868 flow. Second operand 9 states and 3317 transitions. [2023-11-10 11:59:24,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 374 transitions, 950 flow [2023-11-10 11:59:24,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 374 transitions, 876 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:24,476 INFO L231 Difference]: Finished difference. Result has 397 places, 370 transitions, 844 flow [2023-11-10 11:59:24,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=461, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=844, PETRI_PLACES=397, PETRI_TRANSITIONS=370} [2023-11-10 11:59:24,477 INFO L281 CegarLoopForPetriNet]: 407 programPoint places, -10 predicate places. [2023-11-10 11:59:24,477 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 370 transitions, 844 flow [2023-11-10 11:59:24,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 367.4) internal successors, (3674), 10 states have internal predecessors, (3674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:24,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:24,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:24,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:24,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:24,686 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:24,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:24,686 INFO L85 PathProgramCache]: Analyzing trace with hash 513384563, now seen corresponding path program 1 times [2023-11-10 11:59:24,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:24,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165652301] [2023-11-10 11:59:24,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:24,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:24,783 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:24,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165652301] [2023-11-10 11:59:24,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165652301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:24,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937841322] [2023-11-10 11:59:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:24,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:24,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:24,785 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:24,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-10 11:59:24,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:24,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:59:24,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:25,008 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:25,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937841322] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:25,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:59:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496319716] [2023-11-10 11:59:25,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:25,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:59:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:59:25,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:59:25,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 461 [2023-11-10 11:59:25,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 370 transitions, 844 flow. Second operand has 18 states, 18 states have (on average 367.6666666666667) internal successors, (6618), 18 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:25,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:25,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 461 [2023-11-10 11:59:25,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:25,371 INFO L124 PetriNetUnfolderBase]: 0/487 cut-off events. [2023-11-10 11:59:25,372 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-10 11:59:25,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 687 conditions, 487 events. 0/487 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1357 event pairs, 0 based on Foata normal form. 4/491 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:59:25,373 INFO L140 encePairwiseOnDemand]: 455/461 looper letters, 29 selfloop transitions, 21 changer transitions 0/394 dead transitions. [2023-11-10 11:59:25,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 394 transitions, 1052 flow [2023-11-10 11:59:25,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:59:25,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:59:25,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7719 transitions. [2023-11-10 11:59:25,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7973349860551596 [2023-11-10 11:59:25,379 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7719 transitions. [2023-11-10 11:59:25,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7719 transitions. [2023-11-10 11:59:25,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:25,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7719 transitions. [2023-11-10 11:59:25,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 367.57142857142856) internal successors, (7719), 21 states have internal predecessors, (7719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:25,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 461.0) internal successors, (10142), 22 states have internal predecessors, (10142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:25,393 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 461.0) internal successors, (10142), 22 states have internal predecessors, (10142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:25,393 INFO L175 Difference]: Start difference. First operand has 397 places, 370 transitions, 844 flow. Second operand 21 states and 7719 transitions. [2023-11-10 11:59:25,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 394 transitions, 1052 flow [2023-11-10 11:59:25,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 394 transitions, 1038 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:25,400 INFO L231 Difference]: Finished difference. Result has 421 places, 383 transitions, 968 flow [2023-11-10 11:59:25,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=461, PETRI_DIFFERENCE_MINUEND_FLOW=838, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=968, PETRI_PLACES=421, PETRI_TRANSITIONS=383} [2023-11-10 11:59:25,401 INFO L281 CegarLoopForPetriNet]: 407 programPoint places, 14 predicate places. [2023-11-10 11:59:25,401 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 383 transitions, 968 flow [2023-11-10 11:59:25,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 367.6666666666667) internal successors, (6618), 18 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:25,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:25,402 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:25,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:25,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:25,608 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:25,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:25,608 INFO L85 PathProgramCache]: Analyzing trace with hash 408379649, now seen corresponding path program 1 times [2023-11-10 11:59:25,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:25,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976872252] [2023-11-10 11:59:25,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:25,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:25,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:25,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976872252] [2023-11-10 11:59:25,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976872252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:25,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503769296] [2023-11-10 11:59:25,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:25,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:25,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:25,948 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:25,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-10 11:59:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:26,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:59:26,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:26,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:26,565 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:26,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503769296] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:26,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:26,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:59:26,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609597490] [2023-11-10 11:59:26,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:26,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:59:26,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:26,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:59:26,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:59:26,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 461 [2023-11-10 11:59:26,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 383 transitions, 968 flow. Second operand has 34 states, 34 states have (on average 367.8235294117647) internal successors, (12506), 34 states have internal predecessors, (12506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:26,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:26,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 461 [2023-11-10 11:59:26,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:26,982 INFO L124 PetriNetUnfolderBase]: 0/435 cut-off events. [2023-11-10 11:59:26,982 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-10 11:59:26,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 661 conditions, 435 events. 0/435 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1025 event pairs, 0 based on Foata normal form. 4/439 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2023-11-10 11:59:26,983 INFO L140 encePairwiseOnDemand]: 456/461 looper letters, 33 selfloop transitions, 31 changer transitions 0/397 dead transitions. [2023-11-10 11:59:26,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 397 transitions, 1204 flow [2023-11-10 11:59:26,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-10 11:59:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-10 11:59:26,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 12113 transitions. [2023-11-10 11:59:26,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7962269111943733 [2023-11-10 11:59:26,992 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 12113 transitions. [2023-11-10 11:59:26,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 12113 transitions. [2023-11-10 11:59:26,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:26,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 12113 transitions. [2023-11-10 11:59:27,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 367.06060606060606) internal successors, (12113), 33 states have internal predecessors, (12113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:27,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 461.0) internal successors, (15674), 34 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:27,015 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 461.0) internal successors, (15674), 34 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:27,015 INFO L175 Difference]: Start difference. First operand has 421 places, 383 transitions, 968 flow. Second operand 33 states and 12113 transitions. [2023-11-10 11:59:27,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 397 transitions, 1204 flow [2023-11-10 11:59:27,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 397 transitions, 1138 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-10 11:59:27,023 INFO L231 Difference]: Finished difference. Result has 427 places, 379 transitions, 999 flow [2023-11-10 11:59:27,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=461, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=999, PETRI_PLACES=427, PETRI_TRANSITIONS=379} [2023-11-10 11:59:27,024 INFO L281 CegarLoopForPetriNet]: 407 programPoint places, 20 predicate places. [2023-11-10 11:59:27,024 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 379 transitions, 999 flow [2023-11-10 11:59:27,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 367.8235294117647) internal successors, (12506), 34 states have internal predecessors, (12506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:27,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:27,026 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:27,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:27,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:27,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:27,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:27,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1136431018, now seen corresponding path program 1 times [2023-11-10 11:59:27,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:27,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062409127] [2023-11-10 11:59:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:27,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:27,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:27,257 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:59:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:27,287 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:59:27,287 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:59:27,287 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:59:27,287 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:59:27,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-10 11:59:27,288 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:59:27,288 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:59:27,288 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-11-10 11:59:27,348 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-11-10 11:59:27,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 439 places, 498 transitions, 1183 flow [2023-11-10 11:59:38,606 INFO L124 PetriNetUnfolderBase]: 11390/42832 cut-off events. [2023-11-10 11:59:38,607 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-11-10 11:59:40,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54185 conditions, 42832 events. 11390/42832 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 750. Compared 512104 event pairs, 7181 based on Foata normal form. 0/38598 useless extension candidates. Maximal degree in co-relation 26441. Up to 11264 conditions per place. [2023-11-10 11:59:40,173 INFO L82 GeneralOperation]: Start removeDead. Operand has 439 places, 498 transitions, 1183 flow [2023-11-10 11:59:40,785 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 439 places, 498 transitions, 1183 flow [2023-11-10 11:59:40,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:59:40,786 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;@6fdbe8f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:59:40,786 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:59:40,789 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:59:40,789 INFO L124 PetriNetUnfolderBase]: 3/90 cut-off events. [2023-11-10 11:59:40,789 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:59:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:40,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:40,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:40,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:40,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1132977051, now seen corresponding path program 1 times [2023-11-10 11:59:40,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:40,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653558022] [2023-11-10 11:59:40,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:40,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:40,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:40,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653558022] [2023-11-10 11:59:40,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653558022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:59:40,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:59:40,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:59:40,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609323869] [2023-11-10 11:59:40,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:59:40,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:59:40,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:40,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:59:40,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:59:40,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 395 out of 498 [2023-11-10 11:59:40,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 498 transitions, 1183 flow. Second operand has 3 states, 3 states have (on average 396.3333333333333) internal successors, (1189), 3 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:40,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:40,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 395 of 498 [2023-11-10 11:59:40,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:54,015 INFO L124 PetriNetUnfolderBase]: 9227/40637 cut-off events. [2023-11-10 11:59:54,015 INFO L125 PetriNetUnfolderBase]: For 34133/34471 co-relation queries the response was YES. [2023-11-10 11:59:55,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65384 conditions, 40637 events. 9227/40637 cut-off events. For 34133/34471 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 497370 event pairs, 7181 based on Foata normal form. 139325/177892 useless extension candidates. Maximal degree in co-relation 31499. Up to 13389 conditions per place. [2023-11-10 11:59:55,367 INFO L140 encePairwiseOnDemand]: 424/498 looper letters, 21 selfloop transitions, 2 changer transitions 33/430 dead transitions. [2023-11-10 11:59:55,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 430 transitions, 1117 flow [2023-11-10 11:59:55,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:59:55,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:59:55,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1299 transitions. [2023-11-10 11:59:55,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8694779116465864 [2023-11-10 11:59:55,369 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1299 transitions. [2023-11-10 11:59:55,369 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1299 transitions. [2023-11-10 11:59:55,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:55,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1299 transitions. [2023-11-10 11:59:55,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 433.0) internal successors, (1299), 3 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:55,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:55,371 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 498.0) internal successors, (1992), 4 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:55,371 INFO L175 Difference]: Start difference. First operand has 439 places, 498 transitions, 1183 flow. Second operand 3 states and 1299 transitions. [2023-11-10 11:59:55,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 430 transitions, 1117 flow [2023-11-10 11:59:55,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 430 transitions, 1117 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:59:55,388 INFO L231 Difference]: Finished difference. Result has 441 places, 394 transitions, 952 flow [2023-11-10 11:59:55,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=1039, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=952, PETRI_PLACES=441, PETRI_TRANSITIONS=394} [2023-11-10 11:59:55,389 INFO L281 CegarLoopForPetriNet]: 439 programPoint places, 2 predicate places. [2023-11-10 11:59:55,389 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 394 transitions, 952 flow [2023-11-10 11:59:55,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 396.3333333333333) internal successors, (1189), 3 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:55,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:55,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:55,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-10 11:59:55,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:55,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 941988807, now seen corresponding path program 1 times [2023-11-10 11:59:55,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:55,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003805668] [2023-11-10 11:59:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:55,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:55,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003805668] [2023-11-10 11:59:55,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003805668] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:55,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310499334] [2023-11-10 11:59:55,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:55,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:55,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:55,613 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:55,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-10 11:59:55,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:55,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:59:55,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:55,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:55,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:55,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:55,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310499334] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:55,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:55,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:59:55,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015771790] [2023-11-10 11:59:55,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:55,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:59:55,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:59:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:59:55,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 498 [2023-11-10 11:59:55,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 394 transitions, 952 flow. Second operand has 10 states, 10 states have (on average 396.4) internal successors, (3964), 10 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:55,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:55,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 498 [2023-11-10 11:59:55,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:56,101 INFO L124 PetriNetUnfolderBase]: 0/591 cut-off events. [2023-11-10 11:59:56,101 INFO L125 PetriNetUnfolderBase]: For 278/278 co-relation queries the response was YES. [2023-11-10 11:59:56,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 793 conditions, 591 events. 0/591 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1929 event pairs, 0 based on Foata normal form. 2/593 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2023-11-10 11:59:56,103 INFO L140 encePairwiseOnDemand]: 492/498 looper letters, 22 selfloop transitions, 9 changer transitions 0/404 dead transitions. [2023-11-10 11:59:56,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 404 transitions, 1036 flow [2023-11-10 11:59:56,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:59:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:59:56,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3579 transitions. [2023-11-10 11:59:56,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7985274431057564 [2023-11-10 11:59:56,106 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3579 transitions. [2023-11-10 11:59:56,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3579 transitions. [2023-11-10 11:59:56,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:56,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3579 transitions. [2023-11-10 11:59:56,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 397.6666666666667) internal successors, (3579), 9 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:56,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:56,112 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 498.0) internal successors, (4980), 10 states have internal predecessors, (4980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:56,112 INFO L175 Difference]: Start difference. First operand has 441 places, 394 transitions, 952 flow. Second operand 9 states and 3579 transitions. [2023-11-10 11:59:56,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 404 transitions, 1036 flow [2023-11-10 11:59:56,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 404 transitions, 944 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:56,120 INFO L231 Difference]: Finished difference. Result has 429 places, 400 transitions, 910 flow [2023-11-10 11:59:56,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=910, PETRI_PLACES=429, PETRI_TRANSITIONS=400} [2023-11-10 11:59:56,121 INFO L281 CegarLoopForPetriNet]: 439 programPoint places, -10 predicate places. [2023-11-10 11:59:56,121 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 400 transitions, 910 flow [2023-11-10 11:59:56,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 396.4) internal successors, (3964), 10 states have internal predecessors, (3964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:56,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:56,122 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:56,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:56,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-10 11:59:56,328 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:56,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1565172978, now seen corresponding path program 1 times [2023-11-10 11:59:56,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:56,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114679986] [2023-11-10 11:59:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:56,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114679986] [2023-11-10 11:59:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114679986] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205432312] [2023-11-10 11:59:56,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:56,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:56,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:56,444 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:56,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-10 11:59:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:56,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:59:56,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:56,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:56,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205432312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:56,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:56,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:59:56,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707954072] [2023-11-10 11:59:56,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:56,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:59:56,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:56,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:59:56,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:59:56,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 498 [2023-11-10 11:59:56,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 400 transitions, 910 flow. Second operand has 18 states, 18 states have (on average 396.6666666666667) internal successors, (7140), 18 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:56,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:56,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 498 [2023-11-10 11:59:56,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:57,061 INFO L124 PetriNetUnfolderBase]: 0/539 cut-off events. [2023-11-10 11:59:57,061 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:59:57,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 761 conditions, 539 events. 0/539 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1569 event pairs, 0 based on Foata normal form. 4/543 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2023-11-10 11:59:57,062 INFO L140 encePairwiseOnDemand]: 492/498 looper letters, 30 selfloop transitions, 21 changer transitions 0/424 dead transitions. [2023-11-10 11:59:57,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 424 transitions, 1120 flow [2023-11-10 11:59:57,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:59:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:59:57,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 8329 transitions. [2023-11-10 11:59:57,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.796423790399694 [2023-11-10 11:59:57,067 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 8329 transitions. [2023-11-10 11:59:57,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 8329 transitions. [2023-11-10 11:59:57,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:57,068 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 8329 transitions. [2023-11-10 11:59:57,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 396.6190476190476) internal successors, (8329), 21 states have internal predecessors, (8329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:57,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 498.0) internal successors, (10956), 22 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:57,084 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 498.0) internal successors, (10956), 22 states have internal predecessors, (10956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:57,084 INFO L175 Difference]: Start difference. First operand has 429 places, 400 transitions, 910 flow. Second operand 21 states and 8329 transitions. [2023-11-10 11:59:57,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 424 transitions, 1120 flow [2023-11-10 11:59:57,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 424 transitions, 1106 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:57,092 INFO L231 Difference]: Finished difference. Result has 453 places, 413 transitions, 1034 flow [2023-11-10 11:59:57,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1034, PETRI_PLACES=453, PETRI_TRANSITIONS=413} [2023-11-10 11:59:57,093 INFO L281 CegarLoopForPetriNet]: 439 programPoint places, 14 predicate places. [2023-11-10 11:59:57,093 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 413 transitions, 1034 flow [2023-11-10 11:59:57,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 396.6666666666667) internal successors, (7140), 18 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:57,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:57,094 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:57,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:57,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:57,301 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash 711628968, now seen corresponding path program 1 times [2023-11-10 11:59:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:57,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574611644] [2023-11-10 11:59:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:57,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:57,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574611644] [2023-11-10 11:59:57,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574611644] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:57,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174333573] [2023-11-10 11:59:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:57,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:57,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:57,526 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:57,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-10 11:59:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:57,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:59:57,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:57,827 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:57,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:58,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174333573] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:58,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:58,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:59:58,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135306693] [2023-11-10 11:59:58,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:58,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:59:58,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:58,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:59:58,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:59:58,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 394 out of 498 [2023-11-10 11:59:58,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 413 transitions, 1034 flow. Second operand has 34 states, 34 states have (on average 396.8235294117647) internal successors, (13492), 34 states have internal predecessors, (13492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:58,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:58,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 394 of 498 [2023-11-10 11:59:58,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:58,642 INFO L124 PetriNetUnfolderBase]: 0/474 cut-off events. [2023-11-10 11:59:58,642 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-10 11:59:58,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 722 conditions, 474 events. 0/474 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1141 event pairs, 0 based on Foata normal form. 5/479 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:59:58,643 INFO L140 encePairwiseOnDemand]: 493/498 looper letters, 36 selfloop transitions, 34 changer transitions 0/432 dead transitions. [2023-11-10 11:59:58,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 432 transitions, 1316 flow [2023-11-10 11:59:58,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-10 11:59:58,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-10 11:59:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 14259 transitions. [2023-11-10 11:59:58,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7953480589022758 [2023-11-10 11:59:58,651 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 14259 transitions. [2023-11-10 11:59:58,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 14259 transitions. [2023-11-10 11:59:58,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:58,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 14259 transitions. [2023-11-10 11:59:58,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 396.0833333333333) internal successors, (14259), 36 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:58,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 498.0) internal successors, (18426), 37 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:58,679 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 498.0) internal successors, (18426), 37 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:58,679 INFO L175 Difference]: Start difference. First operand has 453 places, 413 transitions, 1034 flow. Second operand 36 states and 14259 transitions. [2023-11-10 11:59:58,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 432 transitions, 1316 flow [2023-11-10 11:59:58,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 432 transitions, 1244 flow, removed 10 selfloop flow, removed 13 redundant places. [2023-11-10 11:59:58,688 INFO L231 Difference]: Finished difference. Result has 462 places, 412 transitions, 1089 flow [2023-11-10 11:59:58,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=498, PETRI_DIFFERENCE_MINUEND_FLOW=949, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1089, PETRI_PLACES=462, PETRI_TRANSITIONS=412} [2023-11-10 11:59:58,688 INFO L281 CegarLoopForPetriNet]: 439 programPoint places, 23 predicate places. [2023-11-10 11:59:58,688 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 412 transitions, 1089 flow [2023-11-10 11:59:58,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 396.8235294117647) internal successors, (13492), 34 states have internal predecessors, (13492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:58,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:58,691 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:58,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:58,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:58,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash 958346889, now seen corresponding path program 1 times [2023-11-10 11:59:58,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:58,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401757609] [2023-11-10 11:59:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:58,919 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:59:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:58,949 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:59:58,949 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:59:58,949 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:59:58,949 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:59:58,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-10 11:59:58,949 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:59:58,950 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:59:58,950 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-11-10 11:59:58,992 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-11-10 11:59:58,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 471 places, 535 transitions, 1286 flow [2023-11-10 12:00:26,524 INFO L124 PetriNetUnfolderBase]: 24713/86935 cut-off events. [2023-11-10 12:00:26,525 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES.