/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_11-ptr_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 11:56:28,053 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 11:56:28,110 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 11:56:28,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 11:56:28,143 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 11:56:28,143 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 11:56:28,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 11:56:28,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 11:56:28,144 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 11:56:28,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 11:56:28,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 11:56:28,147 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 11:56:28,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 11:56:28,149 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 11:56:28,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 11:56:28,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 11:56:28,149 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 11:56:28,149 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 11:56:28,150 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 11:56:28,150 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 11:56:28,150 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 11:56:28,151 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 11:56:28,151 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 11:56:28,151 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 11:56:28,151 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 11:56:28,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:56:28,151 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 11:56:28,151 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 11:56:28,152 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 11:56:28,152 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 11:56:28,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 11:56:28,153 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 11:56:28,153 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 11:56:28,153 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 11:56:28,333 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 11:56:28,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 11:56:28,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 11:56:28,350 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 11:56:28,351 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 11:56:28,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-10 11:56:29,269 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 11:56:29,460 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 11:56:29,460 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_11-ptr_racing.i [2023-11-10 11:56:29,473 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7c36a84/e4f7c91ec9d246c997d6654cc85bc802/FLAGe4f4e350a [2023-11-10 11:56:29,847 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c7c36a84/e4f7c91ec9d246c997d6654cc85bc802 [2023-11-10 11:56:29,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 11:56:29,850 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 11:56:29,851 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 11:56:29,851 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 11:56:29,854 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 11:56:29,855 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:56:29" (1/1) ... [2023-11-10 11:56:29,855 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101ff8f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:29, skipping insertion in model container [2023-11-10 11:56:29,856 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:56:29" (1/1) ... [2023-11-10 11:56:29,901 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 11:56:30,115 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_11-ptr_racing.i[30176,30189] [2023-11-10 11:56:30,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:56:30,147 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 11:56:30,186 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_11-ptr_racing.i[30176,30189] [2023-11-10 11:56:30,191 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:56:30,225 INFO L206 MainTranslator]: Completed translation [2023-11-10 11:56:30,225 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30 WrapperNode [2023-11-10 11:56:30,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 11:56:30,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 11:56:30,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 11:56:30,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 11:56:30,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,250 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,267 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2023-11-10 11:56:30,267 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 11:56:30,268 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 11:56:30,268 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 11:56:30,268 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 11:56:30,276 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,278 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,278 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,283 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,286 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,287 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,288 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 11:56:30,297 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 11:56:30,297 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 11:56:30,297 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 11:56:30,298 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (1/1) ... [2023-11-10 11:56:30,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:56:30,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:30,570 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 11:56:30,572 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 11:56:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 11:56:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 11:56:30,600 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-10 11:56:30,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 11:56:30,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 11:56:30,601 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-10 11:56:30,601 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-10 11:56:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 11:56:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 11:56:30,602 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 11:56:30,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 11:56:30,603 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 11:56:30,701 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 11:56:30,702 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 11:56:30,832 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 11:56:30,845 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 11:56:30,846 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-10 11:56:30,848 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:56:30 BoogieIcfgContainer [2023-11-10 11:56:30,848 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 11:56:30,850 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 11:56:30,850 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 11:56:30,852 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 11:56:30,852 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 11:56:29" (1/3) ... [2023-11-10 11:56:30,852 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4352ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:56:30, skipping insertion in model container [2023-11-10 11:56:30,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:56:30" (2/3) ... [2023-11-10 11:56:30,853 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f4352ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:56:30, skipping insertion in model container [2023-11-10 11:56:30,853 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:56:30" (3/3) ... [2023-11-10 11:56:30,854 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2023-11-10 11:56:30,865 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 11:56:30,866 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-10 11:56:30,866 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 11:56:30,906 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-10 11:56:30,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 110 places, 119 transitions, 245 flow [2023-11-10 11:56:30,974 INFO L124 PetriNetUnfolderBase]: 17/159 cut-off events. [2023-11-10 11:56:30,974 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 11:56:30,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 159 events. 17/159 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 390 event pairs, 0 based on Foata normal form. 0/137 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-10 11:56:30,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 110 places, 119 transitions, 245 flow [2023-11-10 11:56:30,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 114 transitions, 232 flow [2023-11-10 11:56:30,988 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:30,993 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:30,993 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:31,008 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:31,008 INFO L124 PetriNetUnfolderBase]: 5/84 cut-off events. [2023-11-10 11:56:31,008 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:31,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:31,009 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] [2023-11-10 11:56:31,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:31,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1595265099, now seen corresponding path program 1 times [2023-11-10 11:56:31,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:31,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906287198] [2023-11-10 11:56:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:31,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:31,226 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 11:56:31,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:31,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906287198] [2023-11-10 11:56:31,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906287198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:31,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:31,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:31,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899388256] [2023-11-10 11:56:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:31,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:31,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:31,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:31,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:31,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 119 [2023-11-10 11:56:31,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 114 transitions, 232 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 11:56:31,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:31,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 119 [2023-11-10 11:56:31,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:31,293 INFO L124 PetriNetUnfolderBase]: 0/106 cut-off events. [2023-11-10 11:56:31,293 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:31,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 106 events. 0/106 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 30/133 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-11-10 11:56:31,295 INFO L140 encePairwiseOnDemand]: 105/119 looper letters, 9 selfloop transitions, 2 changer transitions 18/104 dead transitions. [2023-11-10 11:56:31,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 104 transitions, 236 flow [2023-11-10 11:56:31,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:31,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-11-10 11:56:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8935574229691877 [2023-11-10 11:56:31,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-11-10 11:56:31,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-11-10 11:56:31,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:31,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-11-10 11:56:31,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 11:56:31,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:31,313 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 119.0) internal successors, (476), 4 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:31,314 INFO L175 Difference]: Start difference. First operand has 106 places, 114 transitions, 232 flow. Second operand 3 states and 319 transitions. [2023-11-10 11:56:31,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 104 transitions, 236 flow [2023-11-10 11:56:31,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 104 transitions, 236 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:31,319 INFO L231 Difference]: Finished difference. Result has 108 places, 84 transitions, 180 flow [2023-11-10 11:56:31,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=119, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=108, PETRI_TRANSITIONS=84} [2023-11-10 11:56:31,323 INFO L281 CegarLoopForPetriNet]: 106 programPoint places, 2 predicate places. [2023-11-10 11:56:31,323 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 84 transitions, 180 flow [2023-11-10 11:56:31,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states 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 11:56:31,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:31,323 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] [2023-11-10 11:56:31,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 11:56:31,324 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:31,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:31,324 INFO L85 PathProgramCache]: Analyzing trace with hash -929715913, now seen corresponding path program 1 times [2023-11-10 11:56:31,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213735851] [2023-11-10 11:56:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:31,350 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:31,399 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:31,399 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:31,400 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:31,401 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:31,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-10 11:56:31,402 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-10 11:56:31,403 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:31,404 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-10 11:56:31,451 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 11:56:31,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 154 transitions, 324 flow [2023-11-10 11:56:31,496 INFO L124 PetriNetUnfolderBase]: 31/260 cut-off events. [2023-11-10 11:56:31,496 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-10 11:56:31,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 260 events. 31/260 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 819 event pairs, 0 based on Foata normal form. 0/222 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2023-11-10 11:56:31,498 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 154 transitions, 324 flow [2023-11-10 11:56:31,500 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 154 transitions, 324 flow [2023-11-10 11:56:31,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:31,508 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:31,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:31,515 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:31,515 INFO L124 PetriNetUnfolderBase]: 3/80 cut-off events. [2023-11-10 11:56:31,515 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:31,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:31,516 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] [2023-11-10 11:56:31,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:31,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:31,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1118501643, now seen corresponding path program 1 times [2023-11-10 11:56:31,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:31,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848193633] [2023-11-10 11:56:31,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:31,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:31,573 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 11:56:31,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:31,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848193633] [2023-11-10 11:56:31,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848193633] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:31,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:31,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:31,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083284445] [2023-11-10 11:56:31,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:31,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:31,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:31,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:31,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:31,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 154 [2023-11-10 11:56:31,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 154 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 11:56:31,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:31,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 154 [2023-11-10 11:56:31,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:31,617 INFO L124 PetriNetUnfolderBase]: 2/209 cut-off events. [2023-11-10 11:56:31,617 INFO L125 PetriNetUnfolderBase]: For 27/60 co-relation queries the response was YES. [2023-11-10 11:56:31,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248 conditions, 209 events. 2/209 cut-off events. For 27/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 470 event pairs, 0 based on Foata normal form. 104/305 useless extension candidates. Maximal degree in co-relation 132. Up to 22 conditions per place. [2023-11-10 11:56:31,619 INFO L140 encePairwiseOnDemand]: 134/154 looper letters, 12 selfloop transitions, 2 changer transitions 24/140 dead transitions. [2023-11-10 11:56:31,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 140 transitions, 330 flow [2023-11-10 11:56:31,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:31,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:31,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-11-10 11:56:31,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8896103896103896 [2023-11-10 11:56:31,621 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-11-10 11:56:31,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-11-10 11:56:31,622 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:31,622 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-11-10 11:56:31,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states 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 11:56:31,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 11:56:31,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 11:56:31,625 INFO L175 Difference]: Start difference. First operand has 140 places, 154 transitions, 324 flow. Second operand 3 states and 411 transitions. [2023-11-10 11:56:31,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 140 transitions, 330 flow [2023-11-10 11:56:31,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 140 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:31,628 INFO L231 Difference]: Finished difference. Result has 142 places, 113 transitions, 246 flow [2023-11-10 11:56:31,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=142, PETRI_TRANSITIONS=113} [2023-11-10 11:56:31,629 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, 2 predicate places. [2023-11-10 11:56:31,629 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 113 transitions, 246 flow [2023-11-10 11:56:31,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states 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 11:56:31,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:31,629 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] [2023-11-10 11:56:31,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-10 11:56:31,630 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:31,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:31,630 INFO L85 PathProgramCache]: Analyzing trace with hash -2090787960, now seen corresponding path program 1 times [2023-11-10 11:56:31,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:31,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412119162] [2023-11-10 11:56:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:31,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:31,737 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 11:56:31,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412119162] [2023-11-10 11:56:31,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412119162] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:31,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120248721] [2023-11-10 11:56:31,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:31,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:31,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:31,741 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 11:56:31,747 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 11:56:31,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:31,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:31,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:31,919 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 11:56:31,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:31,969 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 11:56:31,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120248721] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:31,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:31,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:31,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541786694] [2023-11-10 11:56:31,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:31,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:31,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:31,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:31,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:31,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 154 [2023-11-10 11:56:31,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 113 transitions, 246 flow. Second operand has 10 states, 10 states have (on average 124.4) internal successors, (1244), 10 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states 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 11:56:31,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:31,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 154 [2023-11-10 11:56:31,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:32,058 INFO L124 PetriNetUnfolderBase]: 0/113 cut-off events. [2023-11-10 11:56:32,058 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-10 11:56:32,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 113 events. 0/113 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 93 event pairs, 0 based on Foata normal form. 2/115 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-11-10 11:56:32,059 INFO L140 encePairwiseOnDemand]: 149/154 looper letters, 9 selfloop transitions, 7 changer transitions 0/107 dead transitions. [2023-11-10 11:56:32,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 107 transitions, 264 flow [2023-11-10 11:56:32,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:32,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1116 transitions. [2023-11-10 11:56:32,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8051948051948052 [2023-11-10 11:56:32,064 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1116 transitions. [2023-11-10 11:56:32,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1116 transitions. [2023-11-10 11:56:32,065 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:32,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1116 transitions. [2023-11-10 11:56:32,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 124.0) internal successors, (1116), 9 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states 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 11:56:32,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 11:56:32,072 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 154.0) internal successors, (1540), 10 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states 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 11:56:32,072 INFO L175 Difference]: Start difference. First operand has 142 places, 113 transitions, 246 flow. Second operand 9 states and 1116 transitions. [2023-11-10 11:56:32,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 107 transitions, 264 flow [2023-11-10 11:56:32,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 107 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:32,077 INFO L231 Difference]: Finished difference. Result has 115 places, 103 transitions, 236 flow [2023-11-10 11:56:32,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=154, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=236, PETRI_PLACES=115, PETRI_TRANSITIONS=103} [2023-11-10 11:56:32,079 INFO L281 CegarLoopForPetriNet]: 140 programPoint places, -25 predicate places. [2023-11-10 11:56:32,079 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 103 transitions, 236 flow [2023-11-10 11:56:32,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 124.4) internal successors, (1244), 10 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states 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 11:56:32,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:32,081 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] [2023-11-10 11:56:32,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-10 11:56:32,287 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 11:56:32,287 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:32,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:32,288 INFO L85 PathProgramCache]: Analyzing trace with hash 620776439, now seen corresponding path program 1 times [2023-11-10 11:56:32,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:32,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253777271] [2023-11-10 11:56:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:32,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:32,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:32,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:32,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:32,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:32,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:32,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-10 11:56:32,347 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:56:32,348 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:32,348 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-10 11:56:32,385 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-10 11:56:32,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 170 places, 189 transitions, 405 flow [2023-11-10 11:56:32,429 INFO L124 PetriNetUnfolderBase]: 50/396 cut-off events. [2023-11-10 11:56:32,430 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:56:32,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 396 events. 50/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1387 event pairs, 1 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 268. Up to 16 conditions per place. [2023-11-10 11:56:32,435 INFO L82 GeneralOperation]: Start removeDead. Operand has 170 places, 189 transitions, 405 flow [2023-11-10 11:56:32,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 170 places, 189 transitions, 405 flow [2023-11-10 11:56:32,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:32,445 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:32,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:32,450 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:32,451 INFO L124 PetriNetUnfolderBase]: 3/80 cut-off events. [2023-11-10 11:56:32,451 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:32,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:32,451 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] [2023-11-10 11:56:32,451 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:32,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:32,452 INFO L85 PathProgramCache]: Analyzing trace with hash -637971861, now seen corresponding path program 1 times [2023-11-10 11:56:32,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:32,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768455452] [2023-11-10 11:56:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:32,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:32,517 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 11:56:32,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768455452] [2023-11-10 11:56:32,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768455452] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:32,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:32,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:32,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214266109] [2023-11-10 11:56:32,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:32,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:32,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:32,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:32,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:32,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 189 [2023-11-10 11:56:32,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 189 transitions, 405 flow. Second operand has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states 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 11:56:32,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:32,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 189 [2023-11-10 11:56:32,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:32,610 INFO L124 PetriNetUnfolderBase]: 7/330 cut-off events. [2023-11-10 11:56:32,610 INFO L125 PetriNetUnfolderBase]: For 75/167 co-relation queries the response was YES. [2023-11-10 11:56:32,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 401 conditions, 330 events. 7/330 cut-off events. For 75/167 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 1004 event pairs, 1 based on Foata normal form. 277/593 useless extension candidates. Maximal degree in co-relation 243. Up to 41 conditions per place. [2023-11-10 11:56:32,612 INFO L140 encePairwiseOnDemand]: 163/189 looper letters, 13 selfloop transitions, 2 changer transitions 25/169 dead transitions. [2023-11-10 11:56:32,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 169 transitions, 403 flow [2023-11-10 11:56:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:32,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:32,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 500 transitions. [2023-11-10 11:56:32,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8818342151675485 [2023-11-10 11:56:32,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 500 transitions. [2023-11-10 11:56:32,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 500 transitions. [2023-11-10 11:56:32,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:32,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 500 transitions. [2023-11-10 11:56:32,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.66666666666666) internal successors, (500), 3 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:32,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states 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 11:56:32,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 189.0) internal successors, (756), 4 states have internal predecessors, (756), 0 states have call successors, (0), 0 states 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 11:56:32,617 INFO L175 Difference]: Start difference. First operand has 170 places, 189 transitions, 405 flow. Second operand 3 states and 500 transitions. [2023-11-10 11:56:32,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 169 transitions, 403 flow [2023-11-10 11:56:32,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 169 transitions, 403 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:32,619 INFO L231 Difference]: Finished difference. Result has 172 places, 141 transitions, 310 flow [2023-11-10 11:56:32,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=172, PETRI_TRANSITIONS=141} [2023-11-10 11:56:32,620 INFO L281 CegarLoopForPetriNet]: 170 programPoint places, 2 predicate places. [2023-11-10 11:56:32,620 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 141 transitions, 310 flow [2023-11-10 11:56:32,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.33333333333334) internal successors, (454), 3 states have internal predecessors, (454), 0 states have call successors, (0), 0 states 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 11:56:32,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:32,621 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] [2023-11-10 11:56:32,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-10 11:56:32,621 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:32,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:32,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1816508665, now seen corresponding path program 1 times [2023-11-10 11:56:32,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:32,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001692751] [2023-11-10 11:56:32,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:32,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:32,687 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 11:56:32,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001692751] [2023-11-10 11:56:32,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001692751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:32,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764190877] [2023-11-10 11:56:32,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:32,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:32,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:32,689 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 11:56:32,692 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 11:56:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:32,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:32,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:32,787 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 11:56:32,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:32,816 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 11:56:32,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764190877] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:32,816 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:32,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:32,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228192245] [2023-11-10 11:56:32,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:32,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:32,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:32,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 189 [2023-11-10 11:56:32,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 141 transitions, 310 flow. Second operand has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states 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 11:56:32,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:32,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 189 [2023-11-10 11:56:32,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:32,895 INFO L124 PetriNetUnfolderBase]: 0/162 cut-off events. [2023-11-10 11:56:32,896 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-10 11:56:32,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 162 events. 0/162 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 255 event pairs, 0 based on Foata normal form. 2/164 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:56:32,896 INFO L140 encePairwiseOnDemand]: 183/189 looper letters, 14 selfloop transitions, 9 changer transitions 0/151 dead transitions. [2023-11-10 11:56:32,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 151 transitions, 378 flow [2023-11-10 11:56:32,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:32,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1366 transitions. [2023-11-10 11:56:32,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8030570252792475 [2023-11-10 11:56:32,899 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1366 transitions. [2023-11-10 11:56:32,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1366 transitions. [2023-11-10 11:56:32,900 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:32,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1366 transitions. [2023-11-10 11:56:32,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 151.77777777777777) internal successors, (1366), 9 states have internal predecessors, (1366), 0 states have call successors, (0), 0 states 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 11:56:32,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 11:56:32,906 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 189.0) internal successors, (1890), 10 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states 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 11:56:32,906 INFO L175 Difference]: Start difference. First operand has 172 places, 141 transitions, 310 flow. Second operand 9 states and 1366 transitions. [2023-11-10 11:56:32,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 151 transitions, 378 flow [2023-11-10 11:56:32,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 151 transitions, 374 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:32,909 INFO L231 Difference]: Finished difference. Result has 160 places, 147 transitions, 356 flow [2023-11-10 11:56:32,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=189, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=356, PETRI_PLACES=160, PETRI_TRANSITIONS=147} [2023-11-10 11:56:32,911 INFO L281 CegarLoopForPetriNet]: 170 programPoint places, -10 predicate places. [2023-11-10 11:56:32,911 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 147 transitions, 356 flow [2023-11-10 11:56:32,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 151.4) internal successors, (1514), 10 states have internal predecessors, (1514), 0 states have call successors, (0), 0 states 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 11:56:32,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:32,912 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] [2023-11-10 11:56:32,917 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 11:56:33,118 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 11:56:33,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:33,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:33,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1772423843, now seen corresponding path program 1 times [2023-11-10 11:56:33,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:33,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816060073] [2023-11-10 11:56:33,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:33,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:33,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:33,171 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:33,171 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:33,171 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:33,172 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:33,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-10 11:56:33,172 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:56:33,172 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:33,172 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-10 11:56:33,200 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-10 11:56:33,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 224 transitions, 488 flow [2023-11-10 11:56:33,260 INFO L124 PetriNetUnfolderBase]: 81/604 cut-off events. [2023-11-10 11:56:33,261 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-10 11:56:33,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 604 events. 81/604 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2427 event pairs, 6 based on Foata normal form. 0/518 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-11-10 11:56:33,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 224 transitions, 488 flow [2023-11-10 11:56:33,276 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 224 transitions, 488 flow [2023-11-10 11:56:33,277 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:33,277 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:33,277 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:33,282 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:33,282 INFO L124 PetriNetUnfolderBase]: 3/80 cut-off events. [2023-11-10 11:56:33,282 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:33,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:33,282 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] [2023-11-10 11:56:33,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:33,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:33,283 INFO L85 PathProgramCache]: Analyzing trace with hash 620811883, now seen corresponding path program 1 times [2023-11-10 11:56:33,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:33,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115835171] [2023-11-10 11:56:33,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:33,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:33,317 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 11:56:33,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:33,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115835171] [2023-11-10 11:56:33,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115835171] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:33,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:33,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:33,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353682645] [2023-11-10 11:56:33,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:33,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:33,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:33,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:33,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:33,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 224 [2023-11-10 11:56:33,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 224 transitions, 488 flow. Second operand has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 11:56:33,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:33,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 224 [2023-11-10 11:56:33,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:33,431 INFO L124 PetriNetUnfolderBase]: 20/519 cut-off events. [2023-11-10 11:56:33,432 INFO L125 PetriNetUnfolderBase]: For 150/263 co-relation queries the response was YES. [2023-11-10 11:56:33,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 519 events. 20/519 cut-off events. For 150/263 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2096 event pairs, 6 based on Foata normal form. 640/1135 useless extension candidates. Maximal degree in co-relation 395. Up to 76 conditions per place. [2023-11-10 11:56:33,436 INFO L140 encePairwiseOnDemand]: 192/224 looper letters, 14 selfloop transitions, 2 changer transitions 26/198 dead transitions. [2023-11-10 11:56:33,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 198 transitions, 478 flow [2023-11-10 11:56:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:33,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:33,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 589 transitions. [2023-11-10 11:56:33,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8764880952380952 [2023-11-10 11:56:33,438 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 589 transitions. [2023-11-10 11:56:33,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 589 transitions. [2023-11-10 11:56:33,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:33,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 589 transitions. [2023-11-10 11:56:33,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 196.33333333333334) internal successors, (589), 3 states have internal predecessors, (589), 0 states have call successors, (0), 0 states 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 11:56:33,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states 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 11:56:33,441 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 224.0) internal successors, (896), 4 states have internal predecessors, (896), 0 states have call successors, (0), 0 states 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 11:56:33,441 INFO L175 Difference]: Start difference. First operand has 200 places, 224 transitions, 488 flow. Second operand 3 states and 589 transitions. [2023-11-10 11:56:33,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 198 transitions, 478 flow [2023-11-10 11:56:33,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 198 transitions, 478 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:33,445 INFO L231 Difference]: Finished difference. Result has 202 places, 169 transitions, 376 flow [2023-11-10 11:56:33,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=376, PETRI_PLACES=202, PETRI_TRANSITIONS=169} [2023-11-10 11:56:33,446 INFO L281 CegarLoopForPetriNet]: 200 programPoint places, 2 predicate places. [2023-11-10 11:56:33,447 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 169 transitions, 376 flow [2023-11-10 11:56:33,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states 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 11:56:33,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:33,447 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] [2023-11-10 11:56:33,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-10 11:56:33,447 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:33,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:33,448 INFO L85 PathProgramCache]: Analyzing trace with hash 2056617222, now seen corresponding path program 1 times [2023-11-10 11:56:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:33,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091536013] [2023-11-10 11:56:33,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:33,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:33,506 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 11:56:33,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:33,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091536013] [2023-11-10 11:56:33,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091536013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:33,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19275264] [2023-11-10 11:56:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:33,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:33,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:33,508 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 11:56:33,510 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 11:56:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:33,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:33,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:33,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:56:33,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:33,626 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 11:56:33,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19275264] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:33,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:33,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120112448] [2023-11-10 11:56:33,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:33,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:33,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:33,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:33,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 224 [2023-11-10 11:56:33,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 169 transitions, 376 flow. Second operand has 10 states, 10 states have (on average 178.4) internal successors, (1784), 10 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states 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 11:56:33,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:33,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 224 [2023-11-10 11:56:33,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:33,696 INFO L124 PetriNetUnfolderBase]: 0/211 cut-off events. [2023-11-10 11:56:33,696 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:56:33,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 211 events. 0/211 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 439 event pairs, 0 based on Foata normal form. 2/213 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:56:33,697 INFO L140 encePairwiseOnDemand]: 218/224 looper letters, 15 selfloop transitions, 9 changer transitions 0/179 dead transitions. [2023-11-10 11:56:33,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 179 transitions, 446 flow [2023-11-10 11:56:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1610 transitions. [2023-11-10 11:56:33,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7986111111111112 [2023-11-10 11:56:33,700 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1610 transitions. [2023-11-10 11:56:33,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1610 transitions. [2023-11-10 11:56:33,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:33,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1610 transitions. [2023-11-10 11:56:33,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 178.88888888888889) internal successors, (1610), 9 states have internal predecessors, (1610), 0 states have call successors, (0), 0 states 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 11:56:33,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states 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 11:56:33,706 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 224.0) internal successors, (2240), 10 states have internal predecessors, (2240), 0 states have call successors, (0), 0 states 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 11:56:33,706 INFO L175 Difference]: Start difference. First operand has 202 places, 169 transitions, 376 flow. Second operand 9 states and 1610 transitions. [2023-11-10 11:56:33,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 179 transitions, 446 flow [2023-11-10 11:56:33,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 179 transitions, 438 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:33,709 INFO L231 Difference]: Finished difference. Result has 190 places, 175 transitions, 418 flow [2023-11-10 11:56:33,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=418, PETRI_PLACES=190, PETRI_TRANSITIONS=175} [2023-11-10 11:56:33,709 INFO L281 CegarLoopForPetriNet]: 200 programPoint places, -10 predicate places. [2023-11-10 11:56:33,710 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 175 transitions, 418 flow [2023-11-10 11:56:33,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 178.4) internal successors, (1784), 10 states have internal predecessors, (1784), 0 states have call successors, (0), 0 states 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 11:56:33,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:33,711 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] [2023-11-10 11:56:33,717 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 11:56:33,915 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 11:56:33,916 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:33,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1726084249, now seen corresponding path program 1 times [2023-11-10 11:56:33,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:33,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213709610] [2023-11-10 11:56:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:33,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:34,034 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 11:56:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213709610] [2023-11-10 11:56:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213709610] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:34,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916442517] [2023-11-10 11:56:34,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:34,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:34,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:34,036 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 11:56:34,038 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 11:56:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:34,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:56:34,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:34,171 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 11:56:34,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:34,247 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 11:56:34,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916442517] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:34,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:34,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:56:34,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033849945] [2023-11-10 11:56:34,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:34,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:56:34,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:34,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:56:34,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:56:34,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 224 [2023-11-10 11:56:34,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 175 transitions, 418 flow. Second operand has 18 states, 18 states have (on average 178.66666666666666) internal successors, (3216), 18 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 11:56:34,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:34,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 224 [2023-11-10 11:56:34,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:34,352 INFO L124 PetriNetUnfolderBase]: 0/187 cut-off events. [2023-11-10 11:56:34,352 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-10 11:56:34,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265 conditions, 187 events. 0/187 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 301 event pairs, 0 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-11-10 11:56:34,353 INFO L140 encePairwiseOnDemand]: 219/224 looper letters, 15 selfloop transitions, 13 changer transitions 0/173 dead transitions. [2023-11-10 11:56:34,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 173 transitions, 482 flow [2023-11-10 11:56:34,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-10 11:56:34,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-10 11:56:34,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2670 transitions. [2023-11-10 11:56:34,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2023-11-10 11:56:34,357 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2670 transitions. [2023-11-10 11:56:34,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2670 transitions. [2023-11-10 11:56:34,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:34,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2670 transitions. [2023-11-10 11:56:34,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 178.0) internal successors, (2670), 15 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states 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 11:56:34,365 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 11:56:34,366 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 224.0) internal successors, (3584), 16 states have internal predecessors, (3584), 0 states have call successors, (0), 0 states 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 11:56:34,366 INFO L175 Difference]: Start difference. First operand has 190 places, 175 transitions, 418 flow. Second operand 15 states and 2670 transitions. [2023-11-10 11:56:34,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 173 transitions, 482 flow [2023-11-10 11:56:34,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 173 transitions, 465 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-10 11:56:34,369 INFO L231 Difference]: Finished difference. Result has 188 places, 166 transitions, 414 flow [2023-11-10 11:56:34,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=224, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=414, PETRI_PLACES=188, PETRI_TRANSITIONS=166} [2023-11-10 11:56:34,370 INFO L281 CegarLoopForPetriNet]: 200 programPoint places, -12 predicate places. [2023-11-10 11:56:34,370 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 166 transitions, 414 flow [2023-11-10 11:56:34,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 178.66666666666666) internal successors, (3216), 18 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states 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 11:56:34,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:34,372 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] [2023-11-10 11:56:34,378 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 11:56:34,578 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 11:56:34,579 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:34,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:34,579 INFO L85 PathProgramCache]: Analyzing trace with hash -2131604791, now seen corresponding path program 1 times [2023-11-10 11:56:34,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:34,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938231914] [2023-11-10 11:56:34,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:34,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:34,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:34,592 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:34,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:34,606 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:34,606 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:34,607 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:34,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-10 11:56:34,607 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:56:34,607 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:34,607 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-10 11:56:34,628 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-10 11:56:34,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 259 transitions, 573 flow [2023-11-10 11:56:34,748 INFO L124 PetriNetUnfolderBase]: 140/960 cut-off events. [2023-11-10 11:56:34,748 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-10 11:56:34,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1066 conditions, 960 events. 140/960 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4502 event pairs, 23 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 649. Up to 80 conditions per place. [2023-11-10 11:56:34,761 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 259 transitions, 573 flow [2023-11-10 11:56:34,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 259 transitions, 573 flow [2023-11-10 11:56:34,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:34,770 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:34,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:34,773 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:34,774 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:56:34,774 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:34,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:34,774 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] [2023-11-10 11:56:34,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:34,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:34,774 INFO L85 PathProgramCache]: Analyzing trace with hash 599885579, now seen corresponding path program 1 times [2023-11-10 11:56:34,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014912608] [2023-11-10 11:56:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:34,795 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 11:56:34,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:34,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014912608] [2023-11-10 11:56:34,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014912608] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:34,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:34,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:34,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963584225] [2023-11-10 11:56:34,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:34,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:34,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:34,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:34,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:34,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 259 [2023-11-10 11:56:34,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 259 transitions, 573 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 11:56:34,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:34,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 259 [2023-11-10 11:56:34,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:34,937 INFO L124 PetriNetUnfolderBase]: 53/848 cut-off events. [2023-11-10 11:56:34,938 INFO L125 PetriNetUnfolderBase]: For 321/493 co-relation queries the response was YES. [2023-11-10 11:56:34,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1106 conditions, 848 events. 53/848 cut-off events. For 321/493 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4090 event pairs, 23 based on Foata normal form. 1389/2195 useless extension candidates. Maximal degree in co-relation 644. Up to 147 conditions per place. [2023-11-10 11:56:34,947 INFO L140 encePairwiseOnDemand]: 221/259 looper letters, 15 selfloop transitions, 2 changer transitions 27/227 dead transitions. [2023-11-10 11:56:34,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 227 transitions, 555 flow [2023-11-10 11:56:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:34,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:34,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-11-10 11:56:34,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8725868725868726 [2023-11-10 11:56:34,949 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-11-10 11:56:34,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-11-10 11:56:34,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:34,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-11-10 11:56:34,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states 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 11:56:34,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 11:56:34,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 259.0) internal successors, (1036), 4 states have internal predecessors, (1036), 0 states have call successors, (0), 0 states 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 11:56:34,952 INFO L175 Difference]: Start difference. First operand has 230 places, 259 transitions, 573 flow. Second operand 3 states and 678 transitions. [2023-11-10 11:56:34,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 227 transitions, 555 flow [2023-11-10 11:56:34,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 227 transitions, 555 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:34,957 INFO L231 Difference]: Finished difference. Result has 232 places, 197 transitions, 444 flow [2023-11-10 11:56:34,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=232, PETRI_TRANSITIONS=197} [2023-11-10 11:56:34,958 INFO L281 CegarLoopForPetriNet]: 230 programPoint places, 2 predicate places. [2023-11-10 11:56:34,958 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 197 transitions, 444 flow [2023-11-10 11:56:34,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states 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 11:56:34,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:34,959 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] [2023-11-10 11:56:34,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-10 11:56:34,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:34,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:34,960 INFO L85 PathProgramCache]: Analyzing trace with hash 938655109, now seen corresponding path program 1 times [2023-11-10 11:56:34,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:34,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840996838] [2023-11-10 11:56:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:34,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:35,006 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 11:56:35,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:35,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840996838] [2023-11-10 11:56:35,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840996838] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:35,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506658733] [2023-11-10 11:56:35,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:35,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:35,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:35,008 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 11:56:35,011 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 11:56:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:35,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:35,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:35,116 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 11:56:35,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:35,146 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 11:56:35,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506658733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:35,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:35,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:35,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233756189] [2023-11-10 11:56:35,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:35,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:35,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:35,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:35,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:35,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 259 [2023-11-10 11:56:35,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 197 transitions, 444 flow. Second operand has 10 states, 10 states have (on average 205.4) internal successors, (2054), 10 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 11:56:35,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:35,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 259 [2023-11-10 11:56:35,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:35,252 INFO L124 PetriNetUnfolderBase]: 0/260 cut-off events. [2023-11-10 11:56:35,252 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-10 11:56:35,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339 conditions, 260 events. 0/260 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 624 event pairs, 0 based on Foata normal form. 2/262 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:56:35,253 INFO L140 encePairwiseOnDemand]: 253/259 looper letters, 16 selfloop transitions, 9 changer transitions 0/207 dead transitions. [2023-11-10 11:56:35,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 207 transitions, 516 flow [2023-11-10 11:56:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1854 transitions. [2023-11-10 11:56:35,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7953667953667953 [2023-11-10 11:56:35,256 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1854 transitions. [2023-11-10 11:56:35,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1854 transitions. [2023-11-10 11:56:35,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:35,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1854 transitions. [2023-11-10 11:56:35,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.0) internal successors, (1854), 9 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states 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 11:56:35,262 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states 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 11:56:35,262 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 259.0) internal successors, (2590), 10 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states 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 11:56:35,262 INFO L175 Difference]: Start difference. First operand has 232 places, 197 transitions, 444 flow. Second operand 9 states and 1854 transitions. [2023-11-10 11:56:35,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 207 transitions, 516 flow [2023-11-10 11:56:35,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 207 transitions, 502 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:35,265 INFO L231 Difference]: Finished difference. Result has 220 places, 203 transitions, 480 flow [2023-11-10 11:56:35,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=480, PETRI_PLACES=220, PETRI_TRANSITIONS=203} [2023-11-10 11:56:35,266 INFO L281 CegarLoopForPetriNet]: 230 programPoint places, -10 predicate places. [2023-11-10 11:56:35,266 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 203 transitions, 480 flow [2023-11-10 11:56:35,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.4) internal successors, (2054), 10 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states 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 11:56:35,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:35,267 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] [2023-11-10 11:56:35,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-10 11:56:35,471 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 11:56:35,472 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:35,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:35,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2048285546, now seen corresponding path program 1 times [2023-11-10 11:56:35,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:35,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51514225] [2023-11-10 11:56:35,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:35,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:35,556 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 11:56:35,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51514225] [2023-11-10 11:56:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51514225] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870463439] [2023-11-10 11:56:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:35,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:35,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:35,558 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 11:56:35,560 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 11:56:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:35,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:56:35,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:35,693 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 11:56:35,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:35,765 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 11:56:35,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870463439] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:35,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:35,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:56:35,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67428565] [2023-11-10 11:56:35,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:35,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:56:35,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:35,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:56:35,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:56:35,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 259 [2023-11-10 11:56:35,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 203 transitions, 480 flow. Second operand has 18 states, 18 states have (on average 205.66666666666666) internal successors, (3702), 18 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states 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 11:56:35,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:35,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 259 [2023-11-10 11:56:35,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:35,901 INFO L124 PetriNetUnfolderBase]: 0/224 cut-off events. [2023-11-10 11:56:35,901 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-10 11:56:35,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 319 conditions, 224 events. 0/224 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 405 event pairs, 0 based on Foata normal form. 3/227 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:56:35,902 INFO L140 encePairwiseOnDemand]: 254/259 looper letters, 18 selfloop transitions, 16 changer transitions 0/206 dead transitions. [2023-11-10 11:56:35,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 206 transitions, 580 flow [2023-11-10 11:56:35,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-10 11:56:35,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-10 11:56:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3691 transitions. [2023-11-10 11:56:35,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7917202917202917 [2023-11-10 11:56:35,908 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3691 transitions. [2023-11-10 11:56:35,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3691 transitions. [2023-11-10 11:56:35,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:35,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3691 transitions. [2023-11-10 11:56:35,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 205.05555555555554) internal successors, (3691), 18 states have internal predecessors, (3691), 0 states have call successors, (0), 0 states 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 11:56:35,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 259.0) internal successors, (4921), 19 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states 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 11:56:35,920 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 259.0) internal successors, (4921), 19 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states 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 11:56:35,920 INFO L175 Difference]: Start difference. First operand has 220 places, 203 transitions, 480 flow. Second operand 18 states and 3691 transitions. [2023-11-10 11:56:35,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 206 transitions, 580 flow [2023-11-10 11:56:35,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 206 transitions, 559 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-10 11:56:35,924 INFO L231 Difference]: Finished difference. Result has 221 places, 197 transitions, 495 flow [2023-11-10 11:56:35,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=259, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=495, PETRI_PLACES=221, PETRI_TRANSITIONS=197} [2023-11-10 11:56:35,925 INFO L281 CegarLoopForPetriNet]: 230 programPoint places, -9 predicate places. [2023-11-10 11:56:35,925 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 197 transitions, 495 flow [2023-11-10 11:56:35,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 205.66666666666666) internal successors, (3702), 18 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states 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 11:56:35,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:35,926 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] [2023-11-10 11:56:35,945 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 11:56:36,130 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 11:56:36,131 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:36,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:36,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1082011237, now seen corresponding path program 1 times [2023-11-10 11:56:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:36,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908022861] [2023-11-10 11:56:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:36,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:36,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:36,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:36,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:36,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:36,159 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:36,160 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:36,160 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-10 11:56:36,160 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:56:36,160 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:36,160 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-10 11:56:36,180 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-10 11:56:36,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 260 places, 294 transitions, 660 flow [2023-11-10 11:56:36,404 INFO L124 PetriNetUnfolderBase]: 263/1620 cut-off events. [2023-11-10 11:56:36,404 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-10 11:56:36,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1846 conditions, 1620 events. 263/1620 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9351 event pairs, 72 based on Foata normal form. 0/1414 useless extension candidates. Maximal degree in co-relation 1059. Up to 192 conditions per place. [2023-11-10 11:56:36,429 INFO L82 GeneralOperation]: Start removeDead. Operand has 260 places, 294 transitions, 660 flow [2023-11-10 11:56:36,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 260 places, 294 transitions, 660 flow [2023-11-10 11:56:36,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:36,444 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:36,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:36,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:36,449 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:56:36,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:36,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:36,449 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] [2023-11-10 11:56:36,449 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:36,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:36,449 INFO L85 PathProgramCache]: Analyzing trace with hash -700750773, now seen corresponding path program 1 times [2023-11-10 11:56:36,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:36,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75752982] [2023-11-10 11:56:36,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:36,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:36,470 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 11:56:36,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:36,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75752982] [2023-11-10 11:56:36,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75752982] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:36,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:36,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:36,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875088950] [2023-11-10 11:56:36,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:36,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:36,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:36,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:36,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:36,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 294 [2023-11-10 11:56:36,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 294 transitions, 660 flow. Second operand has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 11:56:36,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:36,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 294 [2023-11-10 11:56:36,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:36,717 INFO L124 PetriNetUnfolderBase]: 134/1465 cut-off events. [2023-11-10 11:56:36,717 INFO L125 PetriNetUnfolderBase]: For 626/730 co-relation queries the response was YES. [2023-11-10 11:56:36,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1994 conditions, 1465 events. 134/1465 cut-off events. For 626/730 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8747 event pairs, 72 based on Foata normal form. 2964/4353 useless extension candidates. Maximal degree in co-relation 1098. Up to 298 conditions per place. [2023-11-10 11:56:36,737 INFO L140 encePairwiseOnDemand]: 250/294 looper letters, 16 selfloop transitions, 2 changer transitions 28/256 dead transitions. [2023-11-10 11:56:36,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 256 transitions, 634 flow [2023-11-10 11:56:36,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 767 transitions. [2023-11-10 11:56:36,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8696145124716553 [2023-11-10 11:56:36,739 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 767 transitions. [2023-11-10 11:56:36,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 767 transitions. [2023-11-10 11:56:36,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:36,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 767 transitions. [2023-11-10 11:56:36,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 255.66666666666666) internal successors, (767), 3 states have internal predecessors, (767), 0 states have call successors, (0), 0 states 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 11:56:36,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:36,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 294.0) internal successors, (1176), 4 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:36,742 INFO L175 Difference]: Start difference. First operand has 260 places, 294 transitions, 660 flow. Second operand 3 states and 767 transitions. [2023-11-10 11:56:36,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 256 transitions, 634 flow [2023-11-10 11:56:36,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 256 transitions, 634 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:36,794 INFO L231 Difference]: Finished difference. Result has 262 places, 225 transitions, 514 flow [2023-11-10 11:56:36,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=514, PETRI_PLACES=262, PETRI_TRANSITIONS=225} [2023-11-10 11:56:36,795 INFO L281 CegarLoopForPetriNet]: 260 programPoint places, 2 predicate places. [2023-11-10 11:56:36,795 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 225 transitions, 514 flow [2023-11-10 11:56:36,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 232.33333333333334) internal successors, (697), 3 states have internal predecessors, (697), 0 states have call successors, (0), 0 states 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 11:56:36,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:36,795 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] [2023-11-10 11:56:36,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-10 11:56:36,795 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:36,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:36,796 INFO L85 PathProgramCache]: Analyzing trace with hash -875427708, now seen corresponding path program 1 times [2023-11-10 11:56:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:36,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545653043] [2023-11-10 11:56:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:36,834 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 11:56:36,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545653043] [2023-11-10 11:56:36,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545653043] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:36,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732896850] [2023-11-10 11:56:36,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:36,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:36,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:36,836 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 11:56:36,838 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 11:56:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:36,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:36,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:36,941 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 11:56:36,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:36,963 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 11:56:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732896850] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:36,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:36,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227113511] [2023-11-10 11:56:36,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:36,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:36,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:36,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:36,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:36,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 294 [2023-11-10 11:56:36,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 225 transitions, 514 flow. Second operand has 10 states, 10 states have (on average 232.4) internal successors, (2324), 10 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states 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 11:56:36,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:36,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 294 [2023-11-10 11:56:36,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:37,056 INFO L124 PetriNetUnfolderBase]: 0/309 cut-off events. [2023-11-10 11:56:37,057 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-10 11:56:37,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 406 conditions, 309 events. 0/309 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 810 event pairs, 0 based on Foata normal form. 2/311 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:56:37,057 INFO L140 encePairwiseOnDemand]: 288/294 looper letters, 17 selfloop transitions, 9 changer transitions 0/235 dead transitions. [2023-11-10 11:56:37,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 235 transitions, 588 flow [2023-11-10 11:56:37,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:37,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2098 transitions. [2023-11-10 11:56:37,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7928949357520786 [2023-11-10 11:56:37,061 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2098 transitions. [2023-11-10 11:56:37,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2098 transitions. [2023-11-10 11:56:37,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:37,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2098 transitions. [2023-11-10 11:56:37,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 233.11111111111111) internal successors, (2098), 9 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states 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 11:56:37,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states 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 11:56:37,078 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 294.0) internal successors, (2940), 10 states have internal predecessors, (2940), 0 states have call successors, (0), 0 states 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 11:56:37,078 INFO L175 Difference]: Start difference. First operand has 262 places, 225 transitions, 514 flow. Second operand 9 states and 2098 transitions. [2023-11-10 11:56:37,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 235 transitions, 588 flow [2023-11-10 11:56:37,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 235 transitions, 566 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:37,082 INFO L231 Difference]: Finished difference. Result has 250 places, 231 transitions, 542 flow [2023-11-10 11:56:37,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=542, PETRI_PLACES=250, PETRI_TRANSITIONS=231} [2023-11-10 11:56:37,082 INFO L281 CegarLoopForPetriNet]: 260 programPoint places, -10 predicate places. [2023-11-10 11:56:37,082 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 231 transitions, 542 flow [2023-11-10 11:56:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 232.4) internal successors, (2324), 10 states have internal predecessors, (2324), 0 states have call successors, (0), 0 states 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 11:56:37,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:37,083 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] [2023-11-10 11:56:37,092 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 11:56:37,293 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 11:56:37,293 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:37,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:37,293 INFO L85 PathProgramCache]: Analyzing trace with hash 2067239635, now seen corresponding path program 1 times [2023-11-10 11:56:37,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:37,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982667928] [2023-11-10 11:56:37,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:37,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:37,376 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 11:56:37,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982667928] [2023-11-10 11:56:37,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982667928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:37,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184998189] [2023-11-10 11:56:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:37,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:37,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:37,378 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 11:56:37,381 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 11:56:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:37,479 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:56:37,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:37,523 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 11:56:37,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:37,599 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 11:56:37,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184998189] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:37,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:37,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:56:37,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539802170] [2023-11-10 11:56:37,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:37,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:56:37,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:37,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:56:37,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:56:37,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 294 [2023-11-10 11:56:37,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 231 transitions, 542 flow. Second operand has 18 states, 18 states have (on average 232.66666666666666) internal successors, (4188), 18 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states 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 11:56:37,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:37,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 294 [2023-11-10 11:56:37,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:37,755 INFO L124 PetriNetUnfolderBase]: 0/261 cut-off events. [2023-11-10 11:56:37,755 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-10 11:56:37,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 373 conditions, 261 events. 0/261 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 509 event pairs, 0 based on Foata normal form. 4/265 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2023-11-10 11:56:37,755 INFO L140 encePairwiseOnDemand]: 289/294 looper letters, 21 selfloop transitions, 19 changer transitions 0/239 dead transitions. [2023-11-10 11:56:37,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 239 transitions, 678 flow [2023-11-10 11:56:37,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:56:37,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:56:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4874 transitions. [2023-11-10 11:56:37,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7894395853579527 [2023-11-10 11:56:37,762 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4874 transitions. [2023-11-10 11:56:37,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4874 transitions. [2023-11-10 11:56:37,764 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:37,764 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4874 transitions. [2023-11-10 11:56:37,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 232.0952380952381) internal successors, (4874), 21 states have internal predecessors, (4874), 0 states have call successors, (0), 0 states 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 11:56:37,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 294.0) internal successors, (6468), 22 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states 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 11:56:37,777 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 294.0) internal successors, (6468), 22 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states 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 11:56:37,777 INFO L175 Difference]: Start difference. First operand has 250 places, 231 transitions, 542 flow. Second operand 21 states and 4874 transitions. [2023-11-10 11:56:37,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 239 transitions, 678 flow [2023-11-10 11:56:37,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 239 transitions, 653 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-10 11:56:37,781 INFO L231 Difference]: Finished difference. Result has 254 places, 228 transitions, 576 flow [2023-11-10 11:56:37,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=294, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=576, PETRI_PLACES=254, PETRI_TRANSITIONS=228} [2023-11-10 11:56:37,782 INFO L281 CegarLoopForPetriNet]: 260 programPoint places, -6 predicate places. [2023-11-10 11:56:37,782 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 228 transitions, 576 flow [2023-11-10 11:56:37,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 232.66666666666666) internal successors, (4188), 18 states have internal predecessors, (4188), 0 states have call successors, (0), 0 states 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 11:56:37,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:37,783 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] [2023-11-10 11:56:37,792 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 11:56:37,988 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 11:56:37,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:37,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:37,989 INFO L85 PathProgramCache]: Analyzing trace with hash 313519923, now seen corresponding path program 1 times [2023-11-10 11:56:37,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:37,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377383828] [2023-11-10 11:56:37,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:37,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:38,002 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:38,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:38,016 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:38,017 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:38,017 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:38,017 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:38,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-10 11:56:38,017 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:56:38,017 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:38,017 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-10 11:56:38,040 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-11-10 11:56:38,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 290 places, 329 transitions, 749 flow [2023-11-10 11:56:38,427 INFO L124 PetriNetUnfolderBase]: 530/2904 cut-off events. [2023-11-10 11:56:38,427 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-11-10 11:56:38,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3395 conditions, 2904 events. 530/2904 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 20059 event pairs, 201 based on Foata normal form. 0/2558 useless extension candidates. Maximal degree in co-relation 1838. Up to 448 conditions per place. [2023-11-10 11:56:38,485 INFO L82 GeneralOperation]: Start removeDead. Operand has 290 places, 329 transitions, 749 flow [2023-11-10 11:56:38,512 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 290 places, 329 transitions, 749 flow [2023-11-10 11:56:38,513 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:38,514 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:38,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:38,517 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:38,517 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:56:38,517 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:38,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:38,517 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] [2023-11-10 11:56:38,518 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:38,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1013870123, now seen corresponding path program 1 times [2023-11-10 11:56:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:38,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753231989] [2023-11-10 11:56:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:38,538 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 11:56:38,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:38,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753231989] [2023-11-10 11:56:38,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753231989] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:38,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:38,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:38,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379350834] [2023-11-10 11:56:38,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:38,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:38,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:38,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:38,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:38,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 329 [2023-11-10 11:56:38,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 329 transitions, 749 flow. Second operand has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 11:56:38,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:38,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 329 [2023-11-10 11:56:38,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:39,042 INFO L124 PetriNetUnfolderBase]: 327/2674 cut-off events. [2023-11-10 11:56:39,042 INFO L125 PetriNetUnfolderBase]: For 1421/1546 co-relation queries the response was YES. [2023-11-10 11:56:39,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3795 conditions, 2674 events. 327/2674 cut-off events. For 1421/1546 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 19392 event pairs, 201 based on Foata normal form. 6341/8873 useless extension candidates. Maximal degree in co-relation 1985. Up to 625 conditions per place. [2023-11-10 11:56:39,063 INFO L140 encePairwiseOnDemand]: 279/329 looper letters, 17 selfloop transitions, 2 changer transitions 29/285 dead transitions. [2023-11-10 11:56:39,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 285 transitions, 715 flow [2023-11-10 11:56:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:39,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:39,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 856 transitions. [2023-11-10 11:56:39,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.867274569402229 [2023-11-10 11:56:39,064 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 856 transitions. [2023-11-10 11:56:39,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 856 transitions. [2023-11-10 11:56:39,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:39,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 856 transitions. [2023-11-10 11:56:39,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.3333333333333) internal successors, (856), 3 states have internal predecessors, (856), 0 states have call successors, (0), 0 states 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 11:56:39,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:39,067 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 329.0) internal successors, (1316), 4 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:39,067 INFO L175 Difference]: Start difference. First operand has 290 places, 329 transitions, 749 flow. Second operand 3 states and 856 transitions. [2023-11-10 11:56:39,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 285 transitions, 715 flow [2023-11-10 11:56:39,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 285 transitions, 715 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:39,072 INFO L231 Difference]: Finished difference. Result has 292 places, 253 transitions, 586 flow [2023-11-10 11:56:39,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=653, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=586, PETRI_PLACES=292, PETRI_TRANSITIONS=253} [2023-11-10 11:56:39,072 INFO L281 CegarLoopForPetriNet]: 290 programPoint places, 2 predicate places. [2023-11-10 11:56:39,073 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 253 transitions, 586 flow [2023-11-10 11:56:39,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 states 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 11:56:39,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:39,073 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] [2023-11-10 11:56:39,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-10 11:56:39,073 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:39,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash 909336067, now seen corresponding path program 1 times [2023-11-10 11:56:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:39,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690940641] [2023-11-10 11:56:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:39,112 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 11:56:39,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690940641] [2023-11-10 11:56:39,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690940641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:39,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406188201] [2023-11-10 11:56:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:39,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:39,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:39,117 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 11:56:39,120 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 11:56:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:39,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:39,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:39,231 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 11:56:39,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:39,255 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 11:56:39,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406188201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:39,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:39,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:39,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902743361] [2023-11-10 11:56:39,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:39,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 329 [2023-11-10 11:56:39,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 253 transitions, 586 flow. Second operand has 10 states, 10 states have (on average 259.4) internal successors, (2594), 10 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states 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 11:56:39,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:39,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 329 [2023-11-10 11:56:39,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:39,347 INFO L124 PetriNetUnfolderBase]: 0/358 cut-off events. [2023-11-10 11:56:39,347 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-10 11:56:39,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 358 events. 0/358 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 995 event pairs, 0 based on Foata normal form. 2/360 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2023-11-10 11:56:39,348 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 18 selfloop transitions, 9 changer transitions 0/263 dead transitions. [2023-11-10 11:56:39,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 263 transitions, 662 flow [2023-11-10 11:56:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:39,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2342 transitions. [2023-11-10 11:56:39,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7909490037149611 [2023-11-10 11:56:39,350 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2342 transitions. [2023-11-10 11:56:39,351 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2342 transitions. [2023-11-10 11:56:39,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:39,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2342 transitions. [2023-11-10 11:56:39,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 260.22222222222223) internal successors, (2342), 9 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states 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 11:56:39,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 329.0) internal successors, (3290), 10 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 11:56:39,356 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 329.0) internal successors, (3290), 10 states have internal predecessors, (3290), 0 states have call successors, (0), 0 states 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 11:56:39,356 INFO L175 Difference]: Start difference. First operand has 292 places, 253 transitions, 586 flow. Second operand 9 states and 2342 transitions. [2023-11-10 11:56:39,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 263 transitions, 662 flow [2023-11-10 11:56:39,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 263 transitions, 630 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:39,360 INFO L231 Difference]: Finished difference. Result has 280 places, 259 transitions, 604 flow [2023-11-10 11:56:39,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=604, PETRI_PLACES=280, PETRI_TRANSITIONS=259} [2023-11-10 11:56:39,360 INFO L281 CegarLoopForPetriNet]: 290 programPoint places, -10 predicate places. [2023-11-10 11:56:39,361 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 259 transitions, 604 flow [2023-11-10 11:56:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 259.4) internal successors, (2594), 10 states have internal predecessors, (2594), 0 states have call successors, (0), 0 states 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 11:56:39,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:39,361 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] [2023-11-10 11:56:39,368 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 11:56:39,566 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 11:56:39,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:39,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:39,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1187757904, now seen corresponding path program 1 times [2023-11-10 11:56:39,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:39,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684627671] [2023-11-10 11:56:39,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:39,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:39,652 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 11:56:39,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:39,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684627671] [2023-11-10 11:56:39,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684627671] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:39,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714694627] [2023-11-10 11:56:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:39,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:39,654 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 11:56:39,657 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 11:56:39,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:39,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:56:39,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:39,799 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 11:56:39,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:39,866 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 11:56:39,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714694627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:39,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:39,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:56:39,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022033860] [2023-11-10 11:56:39,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:39,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:56:39,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:39,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:56:39,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:56:39,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 329 [2023-11-10 11:56:39,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 259 transitions, 604 flow. Second operand has 18 states, 18 states have (on average 259.6666666666667) internal successors, (4674), 18 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states 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 11:56:39,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:39,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 329 [2023-11-10 11:56:39,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:40,089 INFO L124 PetriNetUnfolderBase]: 0/310 cut-off events. [2023-11-10 11:56:40,089 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-10 11:56:40,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 310 events. 0/310 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 670 event pairs, 0 based on Foata normal form. 4/314 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:56:40,090 INFO L140 encePairwiseOnDemand]: 323/329 looper letters, 26 selfloop transitions, 21 changer transitions 0/283 dead transitions. [2023-11-10 11:56:40,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 283 transitions, 806 flow [2023-11-10 11:56:40,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:56:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:56:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5448 transitions. [2023-11-10 11:56:40,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7885366912722536 [2023-11-10 11:56:40,097 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5448 transitions. [2023-11-10 11:56:40,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5448 transitions. [2023-11-10 11:56:40,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:40,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5448 transitions. [2023-11-10 11:56:40,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 259.42857142857144) internal successors, (5448), 21 states have internal predecessors, (5448), 0 states have call successors, (0), 0 states 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 11:56:40,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 329.0) internal successors, (7238), 22 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states 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 11:56:40,112 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 329.0) internal successors, (7238), 22 states have internal predecessors, (7238), 0 states have call successors, (0), 0 states 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 11:56:40,112 INFO L175 Difference]: Start difference. First operand has 280 places, 259 transitions, 604 flow. Second operand 21 states and 5448 transitions. [2023-11-10 11:56:40,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 283 transitions, 806 flow [2023-11-10 11:56:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 283 transitions, 792 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:40,117 INFO L231 Difference]: Finished difference. Result has 304 places, 272 transitions, 728 flow [2023-11-10 11:56:40,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=329, PETRI_DIFFERENCE_MINUEND_FLOW=598, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=728, PETRI_PLACES=304, PETRI_TRANSITIONS=272} [2023-11-10 11:56:40,118 INFO L281 CegarLoopForPetriNet]: 290 programPoint places, 14 predicate places. [2023-11-10 11:56:40,118 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 272 transitions, 728 flow [2023-11-10 11:56:40,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 259.6666666666667) internal successors, (4674), 18 states have internal predecessors, (4674), 0 states have call successors, (0), 0 states 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 11:56:40,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:40,119 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] [2023-11-10 11:56:40,127 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 11:56:40,324 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 11:56:40,324 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:40,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1040836849, now seen corresponding path program 1 times [2023-11-10 11:56:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:40,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873817273] [2023-11-10 11:56:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:40,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:40,342 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:40,364 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:40,364 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:40,364 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:40,364 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:40,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-10 11:56:40,365 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:56:40,365 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:40,365 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-10 11:56:40,394 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-10 11:56:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 320 places, 364 transitions, 840 flow [2023-11-10 11:56:41,328 INFO L124 PetriNetUnfolderBase]: 1117/5468 cut-off events. [2023-11-10 11:56:41,328 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-11-10 11:56:41,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6545 conditions, 5468 events. 1117/5468 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 44870 event pairs, 522 based on Foata normal form. 0/4854 useless extension candidates. Maximal degree in co-relation 3386. Up to 1024 conditions per place. [2023-11-10 11:56:41,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 320 places, 364 transitions, 840 flow [2023-11-10 11:56:41,443 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 320 places, 364 transitions, 840 flow [2023-11-10 11:56:41,444 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:41,444 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:41,444 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:41,447 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:41,447 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:56:41,447 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:41,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:41,448 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] [2023-11-10 11:56:41,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:41,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:41,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1448780971, now seen corresponding path program 1 times [2023-11-10 11:56:41,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:41,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681701669] [2023-11-10 11:56:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:41,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:41,468 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 11:56:41,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:41,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681701669] [2023-11-10 11:56:41,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681701669] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:41,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:41,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:41,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080455842] [2023-11-10 11:56:41,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:41,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:41,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:41,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:41,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 285 out of 364 [2023-11-10 11:56:41,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 364 transitions, 840 flow. Second operand has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states 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 11:56:41,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:41,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 285 of 364 [2023-11-10 11:56:41,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:42,609 INFO L124 PetriNetUnfolderBase]: 776/5099 cut-off events. [2023-11-10 11:56:42,609 INFO L125 PetriNetUnfolderBase]: For 3184/3330 co-relation queries the response was YES. [2023-11-10 11:56:42,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7517 conditions, 5099 events. 776/5099 cut-off events. For 3184/3330 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 43373 event pairs, 522 based on Foata normal form. 13664/18491 useless extension candidates. Maximal degree in co-relation 3786. Up to 1336 conditions per place. [2023-11-10 11:56:42,652 INFO L140 encePairwiseOnDemand]: 308/364 looper letters, 18 selfloop transitions, 2 changer transitions 30/314 dead transitions. [2023-11-10 11:56:42,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 314 transitions, 798 flow [2023-11-10 11:56:42,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 945 transitions. [2023-11-10 11:56:42,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8653846153846154 [2023-11-10 11:56:42,655 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 945 transitions. [2023-11-10 11:56:42,655 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 945 transitions. [2023-11-10 11:56:42,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:42,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 945 transitions. [2023-11-10 11:56:42,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 states 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 11:56:42,657 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 11:56:42,657 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 364.0) internal successors, (1456), 4 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states 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 11:56:42,657 INFO L175 Difference]: Start difference. First operand has 320 places, 364 transitions, 840 flow. Second operand 3 states and 945 transitions. [2023-11-10 11:56:42,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 314 transitions, 798 flow [2023-11-10 11:56:42,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 314 transitions, 798 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:42,662 INFO L231 Difference]: Finished difference. Result has 322 places, 281 transitions, 660 flow [2023-11-10 11:56:42,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=660, PETRI_PLACES=322, PETRI_TRANSITIONS=281} [2023-11-10 11:56:42,662 INFO L281 CegarLoopForPetriNet]: 320 programPoint places, 2 predicate places. [2023-11-10 11:56:42,662 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 281 transitions, 660 flow [2023-11-10 11:56:42,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 286.3333333333333) internal successors, (859), 3 states have internal predecessors, (859), 0 states have call successors, (0), 0 states 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 11:56:42,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:42,663 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] [2023-11-10 11:56:42,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-10 11:56:42,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:42,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:42,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1997979138, now seen corresponding path program 1 times [2023-11-10 11:56:42,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:42,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464686437] [2023-11-10 11:56:42,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:42,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:42,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:42,694 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 11:56:42,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464686437] [2023-11-10 11:56:42,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464686437] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:42,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217404015] [2023-11-10 11:56:42,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:42,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:42,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:42,696 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 11:56:42,697 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 11:56:42,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:42,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:42,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:42,820 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 11:56:42,820 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:42,839 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 11:56:42,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217404015] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:42,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:42,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538824959] [2023-11-10 11:56:42,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:42,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:42,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:42,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:42,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 364 [2023-11-10 11:56:42,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 281 transitions, 660 flow. Second operand has 10 states, 10 states have (on average 286.4) internal successors, (2864), 10 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states 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 11:56:42,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:42,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 364 [2023-11-10 11:56:42,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:42,943 INFO L124 PetriNetUnfolderBase]: 0/407 cut-off events. [2023-11-10 11:56:42,944 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:56:42,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 543 conditions, 407 events. 0/407 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1178 event pairs, 0 based on Foata normal form. 2/409 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2023-11-10 11:56:42,947 INFO L140 encePairwiseOnDemand]: 358/364 looper letters, 19 selfloop transitions, 9 changer transitions 0/291 dead transitions. [2023-11-10 11:56:42,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 291 transitions, 738 flow [2023-11-10 11:56:42,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:42,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2586 transitions. [2023-11-10 11:56:42,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7893772893772893 [2023-11-10 11:56:42,952 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2586 transitions. [2023-11-10 11:56:42,952 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2586 transitions. [2023-11-10 11:56:42,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:42,954 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2586 transitions. [2023-11-10 11:56:42,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 287.3333333333333) internal successors, (2586), 9 states have internal predecessors, (2586), 0 states have call successors, (0), 0 states 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 11:56:42,959 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 364.0) internal successors, (3640), 10 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states 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 11:56:42,960 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 364.0) internal successors, (3640), 10 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states 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 11:56:42,960 INFO L175 Difference]: Start difference. First operand has 322 places, 281 transitions, 660 flow. Second operand 9 states and 2586 transitions. [2023-11-10 11:56:42,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 291 transitions, 738 flow [2023-11-10 11:56:42,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 291 transitions, 694 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:42,964 INFO L231 Difference]: Finished difference. Result has 310 places, 287 transitions, 666 flow [2023-11-10 11:56:42,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=666, PETRI_PLACES=310, PETRI_TRANSITIONS=287} [2023-11-10 11:56:42,964 INFO L281 CegarLoopForPetriNet]: 320 programPoint places, -10 predicate places. [2023-11-10 11:56:42,964 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 287 transitions, 666 flow [2023-11-10 11:56:42,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 286.4) internal successors, (2864), 10 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states 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 11:56:42,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:42,965 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] [2023-11-10 11:56:42,980 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 11:56:43,169 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 11:56:43,170 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:43,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash -391763443, now seen corresponding path program 1 times [2023-11-10 11:56:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:43,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520882211] [2023-11-10 11:56:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:43,236 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 11:56:43,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:43,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520882211] [2023-11-10 11:56:43,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520882211] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:43,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773786717] [2023-11-10 11:56:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:43,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:43,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:43,238 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 11:56:43,240 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 11:56:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:43,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:56:43,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:43,399 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 11:56:43,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:43,515 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 11:56:43,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773786717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:43,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:43,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:56:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768228900] [2023-11-10 11:56:43,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:56:43,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:56:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:56:43,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 364 [2023-11-10 11:56:43,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 287 transitions, 666 flow. Second operand has 18 states, 18 states have (on average 286.6666666666667) internal successors, (5160), 18 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states 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 11:56:43,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:43,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 364 [2023-11-10 11:56:43,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:43,693 INFO L124 PetriNetUnfolderBase]: 0/359 cut-off events. [2023-11-10 11:56:43,693 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-10 11:56:43,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 359 events. 0/359 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 855 event pairs, 0 based on Foata normal form. 4/363 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2023-11-10 11:56:43,695 INFO L140 encePairwiseOnDemand]: 358/364 looper letters, 27 selfloop transitions, 21 changer transitions 0/311 dead transitions. [2023-11-10 11:56:43,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 311 transitions, 870 flow [2023-11-10 11:56:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:56:43,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:56:43,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6016 transitions. [2023-11-10 11:56:43,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7870225013082156 [2023-11-10 11:56:43,699 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6016 transitions. [2023-11-10 11:56:43,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6016 transitions. [2023-11-10 11:56:43,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:43,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6016 transitions. [2023-11-10 11:56:43,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 286.4761904761905) internal successors, (6016), 21 states have internal predecessors, (6016), 0 states have call successors, (0), 0 states 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 11:56:43,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 364.0) internal successors, (8008), 22 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states 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 11:56:43,712 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 364.0) internal successors, (8008), 22 states have internal predecessors, (8008), 0 states have call successors, (0), 0 states 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 11:56:43,713 INFO L175 Difference]: Start difference. First operand has 310 places, 287 transitions, 666 flow. Second operand 21 states and 6016 transitions. [2023-11-10 11:56:43,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 311 transitions, 870 flow [2023-11-10 11:56:43,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 311 transitions, 856 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:43,717 INFO L231 Difference]: Finished difference. Result has 334 places, 300 transitions, 790 flow [2023-11-10 11:56:43,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=790, PETRI_PLACES=334, PETRI_TRANSITIONS=300} [2023-11-10 11:56:43,718 INFO L281 CegarLoopForPetriNet]: 320 programPoint places, 14 predicate places. [2023-11-10 11:56:43,719 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 300 transitions, 790 flow [2023-11-10 11:56:43,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 286.6666666666667) internal successors, (5160), 18 states have internal predecessors, (5160), 0 states have call successors, (0), 0 states 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 11:56:43,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:43,719 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] [2023-11-10 11:56:43,725 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 11:56:43,924 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 11:56:43,925 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:43,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash 775260823, now seen corresponding path program 1 times [2023-11-10 11:56:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:43,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340930669] [2023-11-10 11:56:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:43,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:44,145 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 11:56:44,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:44,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340930669] [2023-11-10 11:56:44,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340930669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:44,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114410871] [2023-11-10 11:56:44,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:44,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:44,147 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 11:56:44,174 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 11:56:44,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:44,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:56:44,291 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:44,356 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 11:56:44,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:44,569 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 11:56:44,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114410871] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:44,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:44,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:56:44,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392307379] [2023-11-10 11:56:44,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:44,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:56:44,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:44,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:56:44,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:56:44,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 284 out of 364 [2023-11-10 11:56:44,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 300 transitions, 790 flow. Second operand has 34 states, 34 states have (on average 286.8235294117647) internal successors, (9752), 34 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states 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 11:56:44,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:44,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 284 of 364 [2023-11-10 11:56:44,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:44,823 INFO L124 PetriNetUnfolderBase]: 0/335 cut-off events. [2023-11-10 11:56:44,823 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:56:44,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 335 events. 0/335 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 717 event pairs, 0 based on Foata normal form. 2/337 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2023-11-10 11:56:44,824 INFO L140 encePairwiseOnDemand]: 359/364 looper letters, 27 selfloop transitions, 25 changer transitions 0/305 dead transitions. [2023-11-10 11:56:44,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 305 transitions, 936 flow [2023-11-10 11:56:44,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-10 11:56:44,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-10 11:56:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7722 transitions. [2023-11-10 11:56:44,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2023-11-10 11:56:44,830 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7722 transitions. [2023-11-10 11:56:44,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7722 transitions. [2023-11-10 11:56:44,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:44,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7722 transitions. [2023-11-10 11:56:44,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 286.0) internal successors, (7722), 27 states have internal predecessors, (7722), 0 states have call successors, (0), 0 states 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 11:56:44,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 364.0) internal successors, (10192), 28 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states 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 11:56:44,848 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 364.0) internal successors, (10192), 28 states have internal predecessors, (10192), 0 states have call successors, (0), 0 states 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 11:56:44,848 INFO L175 Difference]: Start difference. First operand has 334 places, 300 transitions, 790 flow. Second operand 27 states and 7722 transitions. [2023-11-10 11:56:44,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 305 transitions, 936 flow [2023-11-10 11:56:44,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 305 transitions, 882 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-10 11:56:44,853 INFO L231 Difference]: Finished difference. Result has 335 places, 291 transitions, 775 flow [2023-11-10 11:56:44,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=364, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=775, PETRI_PLACES=335, PETRI_TRANSITIONS=291} [2023-11-10 11:56:44,854 INFO L281 CegarLoopForPetriNet]: 320 programPoint places, 15 predicate places. [2023-11-10 11:56:44,854 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 291 transitions, 775 flow [2023-11-10 11:56:44,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 286.8235294117647) internal successors, (9752), 34 states have internal predecessors, (9752), 0 states have call successors, (0), 0 states 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 11:56:44,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:44,856 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] [2023-11-10 11:56:44,873 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 11:56:45,060 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 11:56:45,061 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:45,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:45,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1920984117, now seen corresponding path program 1 times [2023-11-10 11:56:45,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:45,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485682304] [2023-11-10 11:56:45,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:45,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:45,133 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:45,158 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:45,158 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:45,159 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:45,159 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:45,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-10 11:56:45,159 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:56:45,160 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:45,160 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-10 11:56:45,193 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-11-10 11:56:45,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 350 places, 399 transitions, 933 flow [2023-11-10 11:56:47,266 INFO L124 PetriNetUnfolderBase]: 2408/10656 cut-off events. [2023-11-10 11:56:47,267 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-11-10 11:56:47,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13024 conditions, 10656 events. 2408/10656 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 101373 event pairs, 1291 based on Foata normal form. 0/9518 useless extension candidates. Maximal degree in co-relation 6535. Up to 2304 conditions per place. [2023-11-10 11:56:47,468 INFO L82 GeneralOperation]: Start removeDead. Operand has 350 places, 399 transitions, 933 flow [2023-11-10 11:56:47,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 350 places, 399 transitions, 933 flow [2023-11-10 11:56:47,658 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:47,659 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:47,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:47,663 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:47,664 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:56:47,664 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:47,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:47,664 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] [2023-11-10 11:56:47,664 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:47,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:47,665 INFO L85 PathProgramCache]: Analyzing trace with hash 603981771, now seen corresponding path program 1 times [2023-11-10 11:56:47,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:47,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085575894] [2023-11-10 11:56:47,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:47,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:47,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:47,685 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 11:56:47,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:47,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085575894] [2023-11-10 11:56:47,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085575894] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:47,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:47,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:47,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212129616] [2023-11-10 11:56:47,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:47,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:47,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:47,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:47,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:47,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 312 out of 399 [2023-11-10 11:56:47,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 399 transitions, 933 flow. Second operand has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 11:56:47,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:47,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 312 of 399 [2023-11-10 11:56:47,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:49,991 INFO L124 PetriNetUnfolderBase]: 1801/10020 cut-off events. [2023-11-10 11:56:49,991 INFO L125 PetriNetUnfolderBase]: For 7119/7375 co-relation queries the response was YES. [2023-11-10 11:56:50,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15272 conditions, 10020 events. 1801/10020 cut-off events. For 7119/7375 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 98417 event pairs, 1291 based on Foata normal form. 29605/39095 useless extension candidates. Maximal degree in co-relation 7508. Up to 2879 conditions per place. [2023-11-10 11:56:50,093 INFO L140 encePairwiseOnDemand]: 337/399 looper letters, 19 selfloop transitions, 2 changer transitions 31/343 dead transitions. [2023-11-10 11:56:50,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 343 transitions, 883 flow [2023-11-10 11:56:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1034 transitions. [2023-11-10 11:56:50,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8638262322472848 [2023-11-10 11:56:50,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1034 transitions. [2023-11-10 11:56:50,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1034 transitions. [2023-11-10 11:56:50,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:50,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1034 transitions. [2023-11-10 11:56:50,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 344.6666666666667) internal successors, (1034), 3 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states 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 11:56:50,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 11:56:50,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 399.0) internal successors, (1596), 4 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states 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 11:56:50,097 INFO L175 Difference]: Start difference. First operand has 350 places, 399 transitions, 933 flow. Second operand 3 states and 1034 transitions. [2023-11-10 11:56:50,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 343 transitions, 883 flow [2023-11-10 11:56:50,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 343 transitions, 883 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:50,102 INFO L231 Difference]: Finished difference. Result has 352 places, 309 transitions, 736 flow [2023-11-10 11:56:50,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=736, PETRI_PLACES=352, PETRI_TRANSITIONS=309} [2023-11-10 11:56:50,103 INFO L281 CegarLoopForPetriNet]: 350 programPoint places, 2 predicate places. [2023-11-10 11:56:50,103 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 309 transitions, 736 flow [2023-11-10 11:56:50,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 313.3333333333333) internal successors, (940), 3 states have internal predecessors, (940), 0 states have call successors, (0), 0 states 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 11:56:50,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:50,103 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] [2023-11-10 11:56:50,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-10 11:56:50,103 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:50,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:50,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1904465791, now seen corresponding path program 1 times [2023-11-10 11:56:50,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:50,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359485624] [2023-11-10 11:56:50,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:50,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:50,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:50,132 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 11:56:50,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359485624] [2023-11-10 11:56:50,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359485624] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:50,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101210520] [2023-11-10 11:56:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:50,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:50,134 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 11:56:50,136 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 11:56:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:50,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:50,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:50,274 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 11:56:50,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:50,293 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 11:56:50,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101210520] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:50,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:50,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:50,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604281408] [2023-11-10 11:56:50,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:50,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:50,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:50,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:50,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:50,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 399 [2023-11-10 11:56:50,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 309 transitions, 736 flow. Second operand has 10 states, 10 states have (on average 313.4) internal successors, (3134), 10 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states 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 11:56:50,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:50,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 399 [2023-11-10 11:56:50,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:50,411 INFO L124 PetriNetUnfolderBase]: 0/456 cut-off events. [2023-11-10 11:56:50,411 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-10 11:56:50,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 613 conditions, 456 events. 0/456 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1363 event pairs, 0 based on Foata normal form. 2/458 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2023-11-10 11:56:50,412 INFO L140 encePairwiseOnDemand]: 393/399 looper letters, 20 selfloop transitions, 9 changer transitions 0/319 dead transitions. [2023-11-10 11:56:50,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 319 transitions, 816 flow [2023-11-10 11:56:50,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:50,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2830 transitions. [2023-11-10 11:56:50,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7880813143971038 [2023-11-10 11:56:50,414 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2830 transitions. [2023-11-10 11:56:50,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2830 transitions. [2023-11-10 11:56:50,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:50,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2830 transitions. [2023-11-10 11:56:50,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 314.44444444444446) internal successors, (2830), 9 states have internal predecessors, (2830), 0 states have call successors, (0), 0 states 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 11:56:50,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 11:56:50,421 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 399.0) internal successors, (3990), 10 states have internal predecessors, (3990), 0 states have call successors, (0), 0 states 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 11:56:50,421 INFO L175 Difference]: Start difference. First operand has 352 places, 309 transitions, 736 flow. Second operand 9 states and 2830 transitions. [2023-11-10 11:56:50,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 319 transitions, 816 flow [2023-11-10 11:56:50,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 319 transitions, 758 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:50,426 INFO L231 Difference]: Finished difference. Result has 340 places, 315 transitions, 728 flow [2023-11-10 11:56:50,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=728, PETRI_PLACES=340, PETRI_TRANSITIONS=315} [2023-11-10 11:56:50,427 INFO L281 CegarLoopForPetriNet]: 350 programPoint places, -10 predicate places. [2023-11-10 11:56:50,427 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 315 transitions, 728 flow [2023-11-10 11:56:50,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 313.4) internal successors, (3134), 10 states have internal predecessors, (3134), 0 states have call successors, (0), 0 states 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 11:56:50,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:50,427 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] [2023-11-10 11:56:50,431 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 11:56:50,631 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 11:56:50,631 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:50,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:50,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1623642890, now seen corresponding path program 1 times [2023-11-10 11:56:50,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:50,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081344805] [2023-11-10 11:56:50,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:50,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:50,692 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 11:56:50,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081344805] [2023-11-10 11:56:50,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081344805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:50,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825066873] [2023-11-10 11:56:50,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:50,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:50,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:50,694 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 11:56:50,696 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 11:56:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:50,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:56:50,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:50,863 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 11:56:50,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:51,034 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 11:56:51,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825066873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:51,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:51,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:56:51,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051355365] [2023-11-10 11:56:51,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:51,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:56:51,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:51,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:56:51,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:56:51,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 399 [2023-11-10 11:56:51,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 315 transitions, 728 flow. Second operand has 18 states, 18 states have (on average 313.6666666666667) internal successors, (5646), 18 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states 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 11:56:51,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:51,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 399 [2023-11-10 11:56:51,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:51,259 INFO L124 PetriNetUnfolderBase]: 0/408 cut-off events. [2023-11-10 11:56:51,259 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-10 11:56:51,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 408 events. 0/408 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1039 event pairs, 0 based on Foata normal form. 4/412 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:56:51,260 INFO L140 encePairwiseOnDemand]: 393/399 looper letters, 28 selfloop transitions, 21 changer transitions 0/339 dead transitions. [2023-11-10 11:56:51,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 339 transitions, 934 flow [2023-11-10 11:56:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:56:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:56:51,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6584 transitions. [2023-11-10 11:56:51,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7857739587062895 [2023-11-10 11:56:51,266 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6584 transitions. [2023-11-10 11:56:51,266 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6584 transitions. [2023-11-10 11:56:51,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:51,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6584 transitions. [2023-11-10 11:56:51,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 313.5238095238095) internal successors, (6584), 21 states have internal predecessors, (6584), 0 states have call successors, (0), 0 states 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 11:56:51,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 399.0) internal successors, (8778), 22 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states 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 11:56:51,280 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 399.0) internal successors, (8778), 22 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states 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 11:56:51,280 INFO L175 Difference]: Start difference. First operand has 340 places, 315 transitions, 728 flow. Second operand 21 states and 6584 transitions. [2023-11-10 11:56:51,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 339 transitions, 934 flow [2023-11-10 11:56:51,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 339 transitions, 920 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:51,285 INFO L231 Difference]: Finished difference. Result has 364 places, 328 transitions, 852 flow [2023-11-10 11:56:51,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=852, PETRI_PLACES=364, PETRI_TRANSITIONS=328} [2023-11-10 11:56:51,286 INFO L281 CegarLoopForPetriNet]: 350 programPoint places, 14 predicate places. [2023-11-10 11:56:51,286 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 328 transitions, 852 flow [2023-11-10 11:56:51,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 313.6666666666667) internal successors, (5646), 18 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states 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 11:56:51,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:51,286 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] [2023-11-10 11:56:51,291 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 11:56:51,491 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 11:56:51,491 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:51,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:51,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1699327888, now seen corresponding path program 1 times [2023-11-10 11:56:51,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:51,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534021620] [2023-11-10 11:56:51,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:51,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:51,681 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 11:56:51,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534021620] [2023-11-10 11:56:51,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534021620] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:51,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110628328] [2023-11-10 11:56:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:51,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:51,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:51,683 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 11:56:51,720 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 11:56:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:51,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:56:51,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:51,932 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 11:56:51,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:52,182 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 11:56:52,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110628328] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:52,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:52,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:56:52,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183451340] [2023-11-10 11:56:52,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:52,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:56:52,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:52,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:56:52,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:56:52,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 311 out of 399 [2023-11-10 11:56:52,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 328 transitions, 852 flow. Second operand has 34 states, 34 states have (on average 313.8235294117647) internal successors, (10670), 34 states have internal predecessors, (10670), 0 states have call successors, (0), 0 states 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 11:56:52,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:52,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 311 of 399 [2023-11-10 11:56:52,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:52,480 INFO L124 PetriNetUnfolderBase]: 0/372 cut-off events. [2023-11-10 11:56:52,480 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-10 11:56:52,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576 conditions, 372 events. 0/372 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 821 event pairs, 0 based on Foata normal form. 3/375 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:56:52,481 INFO L140 encePairwiseOnDemand]: 394/399 looper letters, 30 selfloop transitions, 28 changer transitions 0/338 dead transitions. [2023-11-10 11:56:52,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 338 transitions, 1044 flow [2023-11-10 11:56:52,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-10 11:56:52,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-10 11:56:52,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 9391 transitions. [2023-11-10 11:56:52,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7845446950710109 [2023-11-10 11:56:52,489 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 9391 transitions. [2023-11-10 11:56:52,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 9391 transitions. [2023-11-10 11:56:52,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:52,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 9391 transitions. [2023-11-10 11:56:52,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 313.03333333333336) internal successors, (9391), 30 states have internal predecessors, (9391), 0 states have call successors, (0), 0 states 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 11:56:52,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 399.0) internal successors, (12369), 31 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states 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 11:56:52,520 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 399.0) internal successors, (12369), 31 states have internal predecessors, (12369), 0 states have call successors, (0), 0 states 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 11:56:52,520 INFO L175 Difference]: Start difference. First operand has 364 places, 328 transitions, 852 flow. Second operand 30 states and 9391 transitions. [2023-11-10 11:56:52,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 338 transitions, 1044 flow [2023-11-10 11:56:52,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 338 transitions, 984 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-10 11:56:52,526 INFO L231 Difference]: Finished difference. Result has 368 places, 322 transitions, 861 flow [2023-11-10 11:56:52,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=399, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=861, PETRI_PLACES=368, PETRI_TRANSITIONS=322} [2023-11-10 11:56:52,527 INFO L281 CegarLoopForPetriNet]: 350 programPoint places, 18 predicate places. [2023-11-10 11:56:52,527 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 322 transitions, 861 flow [2023-11-10 11:56:52,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 313.8235294117647) internal successors, (10670), 34 states have internal predecessors, (10670), 0 states have call successors, (0), 0 states 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 11:56:52,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:52,528 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] [2023-11-10 11:56:52,532 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 11:56:52,732 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 11:56:52,733 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:52,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:52,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1503599009, now seen corresponding path program 1 times [2023-11-10 11:56:52,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:52,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774623001] [2023-11-10 11:56:52,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:52,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:52,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:56:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:56:52,770 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:56:52,770 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:56:52,770 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:56:52,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:56:52,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-10 11:56:52,771 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:56:52,771 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:56:52,771 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-11-10 11:56:52,797 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-10 11:56:52,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 380 places, 434 transitions, 1028 flow [2023-11-10 11:56:57,388 INFO L124 PetriNetUnfolderBase]: 5235/21220 cut-off events. [2023-11-10 11:56:57,388 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-11-10 11:56:57,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26416 conditions, 21220 events. 5235/21220 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 228335 event pairs, 3084 based on Foata normal form. 0/19046 useless extension candidates. Maximal degree in co-relation 13013. Up to 5120 conditions per place. [2023-11-10 11:56:57,823 INFO L82 GeneralOperation]: Start removeDead. Operand has 380 places, 434 transitions, 1028 flow [2023-11-10 11:56:58,141 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 380 places, 434 transitions, 1028 flow [2023-11-10 11:56:58,142 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:56:58,142 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:56:58,142 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:56:58,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:56:58,145 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:56:58,145 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:56:58,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:58,145 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] [2023-11-10 11:56:58,145 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:58,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:58,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1520527477, now seen corresponding path program 1 times [2023-11-10 11:56:58,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:58,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305665305] [2023-11-10 11:56:58,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:58,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:58,161 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 11:56:58,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:58,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305665305] [2023-11-10 11:56:58,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305665305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:58,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:58,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:56:58,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314491019] [2023-11-10 11:56:58,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:58,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:56:58,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:58,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:56:58,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:58,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 339 out of 434 [2023-11-10 11:56:58,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 434 transitions, 1028 flow. Second operand has 3 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:58,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:58,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 339 of 434 [2023-11-10 11:56:58,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:03,401 INFO L124 PetriNetUnfolderBase]: 4106/20061 cut-off events. [2023-11-10 11:57:03,401 INFO L125 PetriNetUnfolderBase]: For 15621/15898 co-relation queries the response was YES. [2023-11-10 11:57:03,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31476 conditions, 20061 events. 4106/20061 cut-off events. For 15621/15898 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 221557 event pairs, 3084 based on Foata normal form. 64276/83293 useless extension candidates. Maximal degree in co-relation 15263. Up to 6214 conditions per place. [2023-11-10 11:57:03,583 INFO L140 encePairwiseOnDemand]: 366/434 looper letters, 20 selfloop transitions, 2 changer transitions 32/372 dead transitions. [2023-11-10 11:57:03,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 372 transitions, 970 flow [2023-11-10 11:57:03,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1123 transitions. [2023-11-10 11:57:03,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8625192012288786 [2023-11-10 11:57:03,584 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1123 transitions. [2023-11-10 11:57:03,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1123 transitions. [2023-11-10 11:57:03,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:03,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1123 transitions. [2023-11-10 11:57:03,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 374.3333333333333) internal successors, (1123), 3 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states 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 11:57:03,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 11:57:03,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 434.0) internal successors, (1736), 4 states have internal predecessors, (1736), 0 states have call successors, (0), 0 states 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 11:57:03,587 INFO L175 Difference]: Start difference. First operand has 380 places, 434 transitions, 1028 flow. Second operand 3 states and 1123 transitions. [2023-11-10 11:57:03,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 372 transitions, 970 flow [2023-11-10 11:57:03,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 372 transitions, 970 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:03,593 INFO L231 Difference]: Finished difference. Result has 382 places, 337 transitions, 814 flow [2023-11-10 11:57:03,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=814, PETRI_PLACES=382, PETRI_TRANSITIONS=337} [2023-11-10 11:57:03,593 INFO L281 CegarLoopForPetriNet]: 380 programPoint places, 2 predicate places. [2023-11-10 11:57:03,593 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 337 transitions, 814 flow [2023-11-10 11:57:03,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 340.3333333333333) internal successors, (1021), 3 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:03,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:03,594 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] [2023-11-10 11:57:03,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-10 11:57:03,594 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:03,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:03,594 INFO L85 PathProgramCache]: Analyzing trace with hash 2086903168, now seen corresponding path program 1 times [2023-11-10 11:57:03,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:03,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136127270] [2023-11-10 11:57:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:03,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:03,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:03,620 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 11:57:03,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136127270] [2023-11-10 11:57:03,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136127270] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:03,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288881628] [2023-11-10 11:57:03,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:03,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:03,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:03,621 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 11:57:03,623 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 11:57:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:03,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:57:03,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:03,777 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 11:57:03,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:03,794 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 11:57:03,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288881628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:03,795 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:03,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:57:03,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058200618] [2023-11-10 11:57:03,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:57:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:03,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:57:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:57:03,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 434 [2023-11-10 11:57:03,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 337 transitions, 814 flow. Second operand has 10 states, 10 states have (on average 340.4) internal successors, (3404), 10 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 11:57:03,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:03,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 434 [2023-11-10 11:57:03,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:03,935 INFO L124 PetriNetUnfolderBase]: 0/505 cut-off events. [2023-11-10 11:57:03,935 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-11-10 11:57:03,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 684 conditions, 505 events. 0/505 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1548 event pairs, 0 based on Foata normal form. 2/507 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2023-11-10 11:57:03,937 INFO L140 encePairwiseOnDemand]: 428/434 looper letters, 21 selfloop transitions, 9 changer transitions 0/347 dead transitions. [2023-11-10 11:57:03,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 347 transitions, 896 flow [2023-11-10 11:57:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:57:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:57:03,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3074 transitions. [2023-11-10 11:57:03,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7869943676395289 [2023-11-10 11:57:03,939 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3074 transitions. [2023-11-10 11:57:03,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3074 transitions. [2023-11-10 11:57:03,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:03,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3074 transitions. [2023-11-10 11:57:03,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 341.55555555555554) internal successors, (3074), 9 states have internal predecessors, (3074), 0 states have call successors, (0), 0 states 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 11:57:03,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states 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 11:57:03,947 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 434.0) internal successors, (4340), 10 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states 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 11:57:03,948 INFO L175 Difference]: Start difference. First operand has 382 places, 337 transitions, 814 flow. Second operand 9 states and 3074 transitions. [2023-11-10 11:57:03,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 347 transitions, 896 flow [2023-11-10 11:57:03,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 347 transitions, 822 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:03,954 INFO L231 Difference]: Finished difference. Result has 370 places, 343 transitions, 790 flow [2023-11-10 11:57:03,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=740, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=790, PETRI_PLACES=370, PETRI_TRANSITIONS=343} [2023-11-10 11:57:03,955 INFO L281 CegarLoopForPetriNet]: 380 programPoint places, -10 predicate places. [2023-11-10 11:57:03,955 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 343 transitions, 790 flow [2023-11-10 11:57:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 340.4) internal successors, (3404), 10 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states 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 11:57:03,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:03,956 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] [2023-11-10 11:57:03,961 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 11:57:04,161 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 11:57:04,161 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:04,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1355957689, now seen corresponding path program 1 times [2023-11-10 11:57:04,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:04,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268410661] [2023-11-10 11:57:04,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:04,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:04,224 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 11:57:04,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:04,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268410661] [2023-11-10 11:57:04,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268410661] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:04,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521238265] [2023-11-10 11:57:04,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:04,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:04,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:04,225 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 11:57:04,259 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 11:57:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:04,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:57:04,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:04,410 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 11:57:04,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:04,483 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 11:57:04,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521238265] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:04,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:04,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:57:04,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441672925] [2023-11-10 11:57:04,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:04,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:57:04,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:57:04,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:57:04,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 434 [2023-11-10 11:57:04,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 343 transitions, 790 flow. Second operand has 18 states, 18 states have (on average 340.6666666666667) internal successors, (6132), 18 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states 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 11:57:04,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:04,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 434 [2023-11-10 11:57:04,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:04,708 INFO L124 PetriNetUnfolderBase]: 0/457 cut-off events. [2023-11-10 11:57:04,708 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-10 11:57:04,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 457 events. 0/457 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1226 event pairs, 0 based on Foata normal form. 4/461 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:57:04,709 INFO L140 encePairwiseOnDemand]: 428/434 looper letters, 29 selfloop transitions, 21 changer transitions 0/367 dead transitions. [2023-11-10 11:57:04,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 367 transitions, 998 flow [2023-11-10 11:57:04,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:57:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:57:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7152 transitions. [2023-11-10 11:57:04,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7847267939433838 [2023-11-10 11:57:04,716 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7152 transitions. [2023-11-10 11:57:04,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7152 transitions. [2023-11-10 11:57:04,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:04,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7152 transitions. [2023-11-10 11:57:04,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 340.57142857142856) internal successors, (7152), 21 states have internal predecessors, (7152), 0 states have call successors, (0), 0 states 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 11:57:04,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 434.0) internal successors, (9548), 22 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states 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 11:57:04,727 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 434.0) internal successors, (9548), 22 states have internal predecessors, (9548), 0 states have call successors, (0), 0 states 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 11:57:04,727 INFO L175 Difference]: Start difference. First operand has 370 places, 343 transitions, 790 flow. Second operand 21 states and 7152 transitions. [2023-11-10 11:57:04,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 367 transitions, 998 flow [2023-11-10 11:57:04,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 367 transitions, 984 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:04,732 INFO L231 Difference]: Finished difference. Result has 394 places, 356 transitions, 914 flow [2023-11-10 11:57:04,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=914, PETRI_PLACES=394, PETRI_TRANSITIONS=356} [2023-11-10 11:57:04,737 INFO L281 CegarLoopForPetriNet]: 380 programPoint places, 14 predicate places. [2023-11-10 11:57:04,737 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 356 transitions, 914 flow [2023-11-10 11:57:04,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 340.6666666666667) internal successors, (6132), 18 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states 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 11:57:04,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:04,738 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] [2023-11-10 11:57:04,744 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 11:57:04,942 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 11:57:04,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:04,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash 545151561, now seen corresponding path program 1 times [2023-11-10 11:57:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:04,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056933129] [2023-11-10 11:57:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:05,091 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 11:57:05,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:05,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056933129] [2023-11-10 11:57:05,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056933129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:05,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706553371] [2023-11-10 11:57:05,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:05,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:05,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:05,092 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 11:57:05,093 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 11:57:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:05,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:57:05,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:05,309 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 11:57:05,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:05,538 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 11:57:05,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706553371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:05,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:05,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:57:05,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227807525] [2023-11-10 11:57:05,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:05,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:57:05,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:05,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:57:05,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:57:05,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 338 out of 434 [2023-11-10 11:57:05,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 356 transitions, 914 flow. Second operand has 34 states, 34 states have (on average 340.8235294117647) internal successors, (11588), 34 states have internal predecessors, (11588), 0 states have call successors, (0), 0 states 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 11:57:05,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:05,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 338 of 434 [2023-11-10 11:57:05,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:05,923 INFO L124 PetriNetUnfolderBase]: 0/409 cut-off events. [2023-11-10 11:57:05,924 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-10 11:57:05,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 635 conditions, 409 events. 0/409 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 925 event pairs, 0 based on Foata normal form. 4/413 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2023-11-10 11:57:05,924 INFO L140 encePairwiseOnDemand]: 429/434 looper letters, 33 selfloop transitions, 31 changer transitions 0/371 dead transitions. [2023-11-10 11:57:05,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 371 transitions, 1152 flow [2023-11-10 11:57:05,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-10 11:57:05,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-10 11:57:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 11222 transitions. [2023-11-10 11:57:05,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7835497835497836 [2023-11-10 11:57:05,932 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 11222 transitions. [2023-11-10 11:57:05,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 11222 transitions. [2023-11-10 11:57:05,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:05,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 11222 transitions. [2023-11-10 11:57:05,941 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 340.06060606060606) internal successors, (11222), 33 states have internal predecessors, (11222), 0 states have call successors, (0), 0 states 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 11:57:05,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 434.0) internal successors, (14756), 34 states have internal predecessors, (14756), 0 states have call successors, (0), 0 states 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 11:57:05,950 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 434.0) internal successors, (14756), 34 states have internal predecessors, (14756), 0 states have call successors, (0), 0 states 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 11:57:05,950 INFO L175 Difference]: Start difference. First operand has 394 places, 356 transitions, 914 flow. Second operand 33 states and 11222 transitions. [2023-11-10 11:57:05,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 371 transitions, 1152 flow [2023-11-10 11:57:05,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 371 transitions, 1086 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-10 11:57:05,955 INFO L231 Difference]: Finished difference. Result has 401 places, 353 transitions, 947 flow [2023-11-10 11:57:05,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=434, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=947, PETRI_PLACES=401, PETRI_TRANSITIONS=353} [2023-11-10 11:57:05,956 INFO L281 CegarLoopForPetriNet]: 380 programPoint places, 21 predicate places. [2023-11-10 11:57:05,956 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 353 transitions, 947 flow [2023-11-10 11:57:05,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 340.8235294117647) internal successors, (11588), 34 states have internal predecessors, (11588), 0 states have call successors, (0), 0 states 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 11:57:05,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:05,958 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] [2023-11-10 11:57:05,965 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 11:57:06,162 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 11:57:06,163 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:06,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:06,163 INFO L85 PathProgramCache]: Analyzing trace with hash 2060899535, now seen corresponding path program 1 times [2023-11-10 11:57:06,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:06,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225956762] [2023-11-10 11:57:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:06,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:06,190 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:57:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:06,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:57:06,214 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:57:06,214 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:57:06,214 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:57:06,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-10 11:57:06,215 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:57:06,215 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:57:06,215 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-11-10 11:57:06,243 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-11-10 11:57:06,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 410 places, 469 transitions, 1125 flow [2023-11-10 11:57:16,378 INFO L124 PetriNetUnfolderBase]: 11390/42792 cut-off events. [2023-11-10 11:57:16,378 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-11-10 11:57:17,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54145 conditions, 42792 events. 11390/42792 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 515659 event pairs, 7181 based on Foata normal form. 0/38558 useless extension candidates. Maximal degree in co-relation 26404. Up to 11264 conditions per place. [2023-11-10 11:57:17,887 INFO L82 GeneralOperation]: Start removeDead. Operand has 410 places, 469 transitions, 1125 flow [2023-11-10 11:57:18,499 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 410 places, 469 transitions, 1125 flow [2023-11-10 11:57:18,499 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:57:18,500 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:57:18,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:57:18,503 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:57:18,503 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:57:18,503 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:18,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:18,503 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] [2023-11-10 11:57:18,503 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:18,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:18,503 INFO L85 PathProgramCache]: Analyzing trace with hash -629779477, now seen corresponding path program 1 times [2023-11-10 11:57:18,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:18,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683839815] [2023-11-10 11:57:18,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:18,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:18,522 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 11:57:18,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:18,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683839815] [2023-11-10 11:57:18,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683839815] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:18,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:18,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:57:18,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405183358] [2023-11-10 11:57:18,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:57:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:57:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:57:18,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 366 out of 469 [2023-11-10 11:57:18,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 469 transitions, 1125 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 11:57:18,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:18,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 366 of 469 [2023-11-10 11:57:18,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:30,060 INFO L124 PetriNetUnfolderBase]: 9227/40598 cut-off events. [2023-11-10 11:57:30,060 INFO L125 PetriNetUnfolderBase]: For 34067/34276 co-relation queries the response was YES. [2023-11-10 11:57:31,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65345 conditions, 40598 events. 9227/40598 cut-off events. For 34067/34276 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 497960 event pairs, 7181 based on Foata normal form. 139437/177965 useless extension candidates. Maximal degree in co-relation 31467. Up to 13389 conditions per place. [2023-11-10 11:57:31,372 INFO L140 encePairwiseOnDemand]: 395/469 looper letters, 21 selfloop transitions, 2 changer transitions 33/401 dead transitions. [2023-11-10 11:57:31,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 401 transitions, 1059 flow [2023-11-10 11:57:31,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1212 transitions. [2023-11-10 11:57:31,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8614072494669509 [2023-11-10 11:57:31,374 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1212 transitions. [2023-11-10 11:57:31,374 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1212 transitions. [2023-11-10 11:57:31,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:31,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1212 transitions. [2023-11-10 11:57:31,375 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 404.0) internal successors, (1212), 3 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states 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 11:57:31,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 11:57:31,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 469.0) internal successors, (1876), 4 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states 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 11:57:31,376 INFO L175 Difference]: Start difference. First operand has 410 places, 469 transitions, 1125 flow. Second operand 3 states and 1212 transitions. [2023-11-10 11:57:31,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 401 transitions, 1059 flow [2023-11-10 11:57:31,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 401 transitions, 1059 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:31,385 INFO L231 Difference]: Finished difference. Result has 412 places, 365 transitions, 894 flow [2023-11-10 11:57:31,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=981, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=894, PETRI_PLACES=412, PETRI_TRANSITIONS=365} [2023-11-10 11:57:31,386 INFO L281 CegarLoopForPetriNet]: 410 programPoint places, 2 predicate places. [2023-11-10 11:57:31,386 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 365 transitions, 894 flow [2023-11-10 11:57:31,386 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 11:57:31,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:31,387 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] [2023-11-10 11:57:31,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-10 11:57:31,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1087184127, now seen corresponding path program 1 times [2023-11-10 11:57:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627178928] [2023-11-10 11:57:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:31,414 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 11:57:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:31,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627178928] [2023-11-10 11:57:31,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627178928] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:31,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831597548] [2023-11-10 11:57:31,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:31,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:31,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:31,415 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 11:57:31,452 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 11:57:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:31,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:57:31,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:31,607 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 11:57:31,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:31,627 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 11:57:31,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831597548] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:31,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:31,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:57:31,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673031378] [2023-11-10 11:57:31,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:31,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:57:31,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:31,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:57:31,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:57:31,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 469 [2023-11-10 11:57:31,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 365 transitions, 894 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 11:57:31,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:31,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 469 [2023-11-10 11:57:31,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:31,788 INFO L124 PetriNetUnfolderBase]: 0/554 cut-off events. [2023-11-10 11:57:31,788 INFO L125 PetriNetUnfolderBase]: For 278/278 co-relation queries the response was YES. [2023-11-10 11:57:31,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 756 conditions, 554 events. 0/554 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1733 event pairs, 0 based on Foata normal form. 2/556 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2023-11-10 11:57:31,790 INFO L140 encePairwiseOnDemand]: 463/469 looper letters, 22 selfloop transitions, 9 changer transitions 0/375 dead transitions. [2023-11-10 11:57:31,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 375 transitions, 978 flow [2023-11-10 11:57:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:57:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:57:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3318 transitions. [2023-11-10 11:57:31,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7860696517412935 [2023-11-10 11:57:31,792 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3318 transitions. [2023-11-10 11:57:31,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3318 transitions. [2023-11-10 11:57:31,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:31,792 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3318 transitions. [2023-11-10 11:57:31,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 368.6666666666667) internal successors, (3318), 9 states have internal predecessors, (3318), 0 states have call successors, (0), 0 states 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 11:57:31,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states 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 11:57:31,797 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 469.0) internal successors, (4690), 10 states have internal predecessors, (4690), 0 states have call successors, (0), 0 states 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 11:57:31,797 INFO L175 Difference]: Start difference. First operand has 412 places, 365 transitions, 894 flow. Second operand 9 states and 3318 transitions. [2023-11-10 11:57:31,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 375 transitions, 978 flow [2023-11-10 11:57:31,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 375 transitions, 886 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:31,802 INFO L231 Difference]: Finished difference. Result has 400 places, 371 transitions, 852 flow [2023-11-10 11:57:31,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=852, PETRI_PLACES=400, PETRI_TRANSITIONS=371} [2023-11-10 11:57:31,803 INFO L281 CegarLoopForPetriNet]: 410 programPoint places, -10 predicate places. [2023-11-10 11:57:31,803 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 371 transitions, 852 flow [2023-11-10 11:57:31,803 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 11:57:31,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:31,803 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] [2023-11-10 11:57:31,815 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 11:57:32,009 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 11:57:32,009 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:32,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:32,010 INFO L85 PathProgramCache]: Analyzing trace with hash -740630588, now seen corresponding path program 1 times [2023-11-10 11:57:32,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:32,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902495678] [2023-11-10 11:57:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:32,082 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 11:57:32,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902495678] [2023-11-10 11:57:32,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902495678] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:32,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980406472] [2023-11-10 11:57:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:32,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:32,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:32,084 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 11:57:32,086 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 11:57:32,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:32,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:57:32,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:32,283 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 11:57:32,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:32,484 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 11:57:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980406472] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:32,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:32,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:57:32,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524757266] [2023-11-10 11:57:32,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:32,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:57:32,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:32,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:57:32,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:57:32,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 469 [2023-11-10 11:57:32,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 371 transitions, 852 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 11:57:32,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:32,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 469 [2023-11-10 11:57:32,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:32,739 INFO L124 PetriNetUnfolderBase]: 0/506 cut-off events. [2023-11-10 11:57:32,740 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:57:32,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 506 events. 0/506 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1410 event pairs, 0 based on Foata normal form. 4/510 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2023-11-10 11:57:32,741 INFO L140 encePairwiseOnDemand]: 463/469 looper letters, 30 selfloop transitions, 21 changer transitions 0/395 dead transitions. [2023-11-10 11:57:32,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 395 transitions, 1062 flow [2023-11-10 11:57:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:57:32,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:57:32,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7720 transitions. [2023-11-10 11:57:32,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.783835922428673 [2023-11-10 11:57:32,745 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7720 transitions. [2023-11-10 11:57:32,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7720 transitions. [2023-11-10 11:57:32,746 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:32,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7720 transitions. [2023-11-10 11:57:32,750 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 367.6190476190476) internal successors, (7720), 21 states have internal predecessors, (7720), 0 states have call successors, (0), 0 states 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 11:57:32,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states 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 11:57:32,756 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 469.0) internal successors, (10318), 22 states have internal predecessors, (10318), 0 states have call successors, (0), 0 states 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 11:57:32,756 INFO L175 Difference]: Start difference. First operand has 400 places, 371 transitions, 852 flow. Second operand 21 states and 7720 transitions. [2023-11-10 11:57:32,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 395 transitions, 1062 flow [2023-11-10 11:57:32,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 395 transitions, 1048 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:32,762 INFO L231 Difference]: Finished difference. Result has 424 places, 384 transitions, 976 flow [2023-11-10 11:57:32,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=976, PETRI_PLACES=424, PETRI_TRANSITIONS=384} [2023-11-10 11:57:32,762 INFO L281 CegarLoopForPetriNet]: 410 programPoint places, 14 predicate places. [2023-11-10 11:57:32,763 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 384 transitions, 976 flow [2023-11-10 11:57:32,763 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 11:57:32,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:32,763 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] [2023-11-10 11:57:32,775 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 11:57:32,969 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 11:57:32,969 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:32,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:32,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1607699138, now seen corresponding path program 1 times [2023-11-10 11:57:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063606666] [2023-11-10 11:57:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:33,159 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 11:57:33,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063606666] [2023-11-10 11:57:33,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063606666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:33,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368523344] [2023-11-10 11:57:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:33,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:33,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:33,161 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 11:57:33,163 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 11:57:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:33,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:57:33,342 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:33,414 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 11:57:33,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:33,644 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 11:57:33,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368523344] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:33,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:33,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:57:33,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964177165] [2023-11-10 11:57:33,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:33,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:57:33,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:33,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:57:33,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:57:33,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 365 out of 469 [2023-11-10 11:57:33,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 384 transitions, 976 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 11:57:33,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:33,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 365 of 469 [2023-11-10 11:57:33,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:34,053 INFO L124 PetriNetUnfolderBase]: 0/446 cut-off events. [2023-11-10 11:57:34,054 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-10 11:57:34,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 694 conditions, 446 events. 0/446 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 1029 event pairs, 0 based on Foata normal form. 5/451 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:57:34,054 INFO L140 encePairwiseOnDemand]: 464/469 looper letters, 36 selfloop transitions, 34 changer transitions 0/404 dead transitions. [2023-11-10 11:57:34,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 404 transitions, 1260 flow [2023-11-10 11:57:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-10 11:57:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-10 11:57:34,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 13215 transitions. [2023-11-10 11:57:34,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7826936744847193 [2023-11-10 11:57:34,061 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 13215 transitions. [2023-11-10 11:57:34,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 13215 transitions. [2023-11-10 11:57:34,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:34,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 13215 transitions. [2023-11-10 11:57:34,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 367.0833333333333) internal successors, (13215), 36 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states 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 11:57:34,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 469.0) internal successors, (17353), 37 states have internal predecessors, (17353), 0 states have call successors, (0), 0 states 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 11:57:34,081 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 469.0) internal successors, (17353), 37 states have internal predecessors, (17353), 0 states have call successors, (0), 0 states 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 11:57:34,081 INFO L175 Difference]: Start difference. First operand has 424 places, 384 transitions, 976 flow. Second operand 36 states and 13215 transitions. [2023-11-10 11:57:34,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 404 transitions, 1260 flow [2023-11-10 11:57:34,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 404 transitions, 1188 flow, removed 10 selfloop flow, removed 13 redundant places. [2023-11-10 11:57:34,087 INFO L231 Difference]: Finished difference. Result has 434 places, 384 transitions, 1033 flow [2023-11-10 11:57:34,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=469, PETRI_DIFFERENCE_MINUEND_FLOW=893, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1033, PETRI_PLACES=434, PETRI_TRANSITIONS=384} [2023-11-10 11:57:34,088 INFO L281 CegarLoopForPetriNet]: 410 programPoint places, 24 predicate places. [2023-11-10 11:57:34,088 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 384 transitions, 1033 flow [2023-11-10 11:57:34,089 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 11:57:34,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:34,089 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] [2023-11-10 11:57:34,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-10 11:57:34,295 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 11:57:34,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:34,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1323463909, now seen corresponding path program 1 times [2023-11-10 11:57:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832949677] [2023-11-10 11:57:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:34,316 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:57:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:34,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:57:34,346 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:57:34,347 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:57:34,347 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:57:34,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-10 11:57:34,347 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:57:34,347 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:57:34,348 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-11-10 11:57:34,387 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-11-10 11:57:34,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 440 places, 504 transitions, 1224 flow [2023-11-10 11:57:55,628 INFO L124 PetriNetUnfolderBase]: 24713/86892 cut-off events. [2023-11-10 11:57:55,629 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-11-10 11:58:01,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111571 conditions, 86892 events. 24713/86892 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1440. Compared 1140083 event pairs, 16398 based on Foata normal form. 0/78550 useless extension candidates. Maximal degree in co-relation 54132. Up to 24576 conditions per place. [2023-11-10 11:58:01,110 INFO L82 GeneralOperation]: Start removeDead. Operand has 440 places, 504 transitions, 1224 flow [2023-11-10 11:58:03,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 440 places, 504 transitions, 1224 flow [2023-11-10 11:58:03,036 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:03,036 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;@5c667328, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:03,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:03,040 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:03,040 INFO L124 PetriNetUnfolderBase]: 5/87 cut-off events. [2023-11-10 11:58:03,040 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:03,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:03,041 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] [2023-11-10 11:58:03,041 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:03,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:03,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1018741525, now seen corresponding path program 1 times [2023-11-10 11:58:03,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:03,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416474560] [2023-11-10 11:58:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:03,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:03,078 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 11:58:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:03,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416474560] [2023-11-10 11:58:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416474560] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:03,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:03,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:03,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674664717] [2023-11-10 11:58:03,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:03,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:03,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:03,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:03,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:03,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 393 out of 504 [2023-11-10 11:58:03,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 504 transitions, 1224 flow. Second operand has 3 states, 3 states have (on average 394.3333333333333) internal successors, (1183), 3 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states 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 11:58:03,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:03,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 393 of 504 [2023-11-10 11:58:03,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand