/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_75-tricky_address2_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 12:00:18,630 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 12:00:18,699 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 12:00:18,728 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 12:00:18,728 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 12:00:18,729 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 12:00:18,730 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 12:00:18,730 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 12:00:18,730 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 12:00:18,735 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 12:00:18,735 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 12:00:18,735 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 12:00:18,736 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 12:00:18,737 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 12:00:18,737 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 12:00:18,737 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 12:00:18,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 12:00:18,738 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 12:00:18,738 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 12:00:18,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 12:00:18,738 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 12:00:18,739 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 12:00:18,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 12:00:18,739 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 12:00:18,739 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 12:00:18,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 12:00:18,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 12:00:18,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 12:00:18,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 12:00:18,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 12:00:18,741 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 12:00:18,741 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 12:00:18,741 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 12:00:18,741 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 12:00:18,963 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 12:00:18,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 12:00:18,986 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 12:00:18,988 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 12:00:18,989 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 12:00:18,990 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-11-10 12:00:20,167 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 12:00:20,643 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 12:00:20,643 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2023-11-10 12:00:20,676 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4954d4cdd/1effadf374854c3c9044f8d9b9a13907/FLAG8782faeaa [2023-11-10 12:00:20,702 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4954d4cdd/1effadf374854c3c9044f8d9b9a13907 [2023-11-10 12:00:20,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 12:00:20,709 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 12:00:20,711 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 12:00:20,711 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 12:00:20,715 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 12:00:20,716 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:00:20" (1/1) ... [2023-11-10 12:00:20,717 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6db9b2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:20, skipping insertion in model container [2023-11-10 12:00:20,718 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 12:00:20" (1/1) ... [2023-11-10 12:00:20,764 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 12:00:21,221 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_75-tricky_address2_racefree.i[41323,41336] [2023-11-10 12:00:21,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 12:00:21,272 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 12:00:21,298 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_75-tricky_address2_racefree.i[41323,41336] [2023-11-10 12:00:21,307 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 12:00:21,343 INFO L206 MainTranslator]: Completed translation [2023-11-10 12:00:21,344 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21 WrapperNode [2023-11-10 12:00:21,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 12:00:21,345 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 12:00:21,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 12:00:21,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 12:00:21,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,362 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,383 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 192 [2023-11-10 12:00:21,383 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 12:00:21,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 12:00:21,384 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 12:00:21,384 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 12:00:21,398 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,401 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,401 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,407 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,411 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,413 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,414 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,416 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 12:00:21,417 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 12:00:21,417 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 12:00:21,417 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 12:00:21,418 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (1/1) ... [2023-11-10 12:00:21,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 12:00:21,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:21,443 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 12:00:21,450 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 12:00:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 12:00:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 12:00:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 12:00:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 12:00:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-10 12:00:21,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 12:00:21,473 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-10 12:00:21,473 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-10 12:00:21,473 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 12:00:21,473 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 12:00:21,473 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 12:00:21,474 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 12:00:21,574 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 12:00:21,576 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 12:00:21,770 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 12:00:21,779 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 12:00:21,779 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-11-10 12:00:21,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:00:21 BoogieIcfgContainer [2023-11-10 12:00:21,782 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 12:00:21,786 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 12:00:21,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 12:00:21,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 12:00:21,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 12:00:20" (1/3) ... [2023-11-10 12:00:21,789 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4249d255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:00:21, skipping insertion in model container [2023-11-10 12:00:21,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 12:00:21" (2/3) ... [2023-11-10 12:00:21,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4249d255 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 12:00:21, skipping insertion in model container [2023-11-10 12:00:21,790 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 12:00:21" (3/3) ... [2023-11-10 12:00:21,791 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2023-11-10 12:00:21,804 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 12:00:21,804 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-10 12:00:21,804 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 12:00:21,894 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-10 12:00:21,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 200 transitions, 407 flow [2023-11-10 12:00:21,986 INFO L124 PetriNetUnfolderBase]: 45/275 cut-off events. [2023-11-10 12:00:21,986 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 12:00:22,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 275 events. 45/275 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 893 event pairs, 0 based on Foata normal form. 0/224 useless extension candidates. Maximal degree in co-relation 152. Up to 8 conditions per place. [2023-11-10 12:00:22,002 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 200 transitions, 407 flow [2023-11-10 12:00:22,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 195 transitions, 394 flow [2023-11-10 12:00:22,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 12:00:22,034 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;@4db3ff10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 12:00:22,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-10 12:00:22,066 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 12:00:22,066 INFO L124 PetriNetUnfolderBase]: 12/122 cut-off events. [2023-11-10 12:00:22,066 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 12:00:22,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:22,067 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] [2023-11-10 12:00:22,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-10 12:00:22,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:22,072 INFO L85 PathProgramCache]: Analyzing trace with hash -713103320, now seen corresponding path program 1 times [2023-11-10 12:00:22,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:22,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159530607] [2023-11-10 12:00:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:22,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:22,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:22,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:22,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159530607] [2023-11-10 12:00:22,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159530607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:00:22,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 12:00:22,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 12:00:22,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256085938] [2023-11-10 12:00:22,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:00:22,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 12:00:22,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:22,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 12:00:22,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 12:00:22,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 200 [2023-11-10 12:00:22,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 195 transitions, 394 flow. Second operand has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:22,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 200 [2023-11-10 12:00:22,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:22,410 INFO L124 PetriNetUnfolderBase]: 4/231 cut-off events. [2023-11-10 12:00:22,411 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 12:00:22,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 231 events. 4/231 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 666 event pairs, 0 based on Foata normal form. 49/267 useless extension candidates. Maximal degree in co-relation 126. Up to 12 conditions per place. [2023-11-10 12:00:22,414 INFO L140 encePairwiseOnDemand]: 170/200 looper letters, 12 selfloop transitions, 2 changer transitions 1/170 dead transitions. [2023-11-10 12:00:22,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 170 transitions, 372 flow [2023-11-10 12:00:22,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 12:00:22,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 12:00:22,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 523 transitions. [2023-11-10 12:00:22,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8716666666666667 [2023-11-10 12:00:22,427 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 523 transitions. [2023-11-10 12:00:22,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 523 transitions. [2023-11-10 12:00:22,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:22,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 523 transitions. [2023-11-10 12:00:22,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.33333333333334) internal successors, (523), 3 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,440 INFO L175 Difference]: Start difference. First operand has 168 places, 195 transitions, 394 flow. Second operand 3 states and 523 transitions. [2023-11-10 12:00:22,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 170 transitions, 372 flow [2023-11-10 12:00:22,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 170 transitions, 372 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 12:00:22,446 INFO L231 Difference]: Finished difference. Result has 169 places, 166 transitions, 346 flow [2023-11-10 12:00:22,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=169, PETRI_TRANSITIONS=166} [2023-11-10 12:00:22,452 INFO L281 CegarLoopForPetriNet]: 168 programPoint places, 1 predicate places. [2023-11-10 12:00:22,452 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 166 transitions, 346 flow [2023-11-10 12:00:22,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:22,453 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:00:22,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 12:00:22,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-10 12:00:22,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1365577007, now seen corresponding path program 1 times [2023-11-10 12:00:22,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:22,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917330819] [2023-11-10 12:00:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:22,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:22,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:22,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:22,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917330819] [2023-11-10 12:00:22,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917330819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:22,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071024580] [2023-11-10 12:00:22,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:22,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:22,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:22,601 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 12:00:22,633 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 12:00:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:22,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 12:00:22,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:22,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:22,838 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:22,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071024580] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:22,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:22,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 12:00:22,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474737091] [2023-11-10 12:00:22,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:22,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 12:00:22,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:22,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 12:00:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 12:00:22,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 200 [2023-11-10 12:00:22,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 166 transitions, 346 flow. Second operand has 10 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:22,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 200 [2023-11-10 12:00:22,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:22,960 INFO L124 PetriNetUnfolderBase]: 4/237 cut-off events. [2023-11-10 12:00:22,960 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-10 12:00:22,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 273 conditions, 237 events. 4/237 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 660 event pairs, 0 based on Foata normal form. 2/228 useless extension candidates. Maximal degree in co-relation 236. Up to 9 conditions per place. [2023-11-10 12:00:22,963 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 13 selfloop transitions, 9 changer transitions 0/176 dead transitions. [2023-11-10 12:00:22,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 176 transitions, 412 flow [2023-11-10 12:00:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 12:00:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 12:00:22,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1455 transitions. [2023-11-10 12:00:22,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8083333333333333 [2023-11-10 12:00:22,984 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1455 transitions. [2023-11-10 12:00:22,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1455 transitions. [2023-11-10 12:00:22,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:22,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1455 transitions. [2023-11-10 12:00:22,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 161.66666666666666) internal successors, (1455), 9 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,991 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,992 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 200.0) internal successors, (2000), 10 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,992 INFO L175 Difference]: Start difference. First operand has 169 places, 166 transitions, 346 flow. Second operand 9 states and 1455 transitions. [2023-11-10 12:00:22,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 176 transitions, 412 flow [2023-11-10 12:00:22,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 176 transitions, 410 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:22,995 INFO L231 Difference]: Finished difference. Result has 178 places, 172 transitions, 394 flow [2023-11-10 12:00:22,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=394, PETRI_PLACES=178, PETRI_TRANSITIONS=172} [2023-11-10 12:00:22,996 INFO L281 CegarLoopForPetriNet]: 168 programPoint places, 10 predicate places. [2023-11-10 12:00:22,997 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 172 transitions, 394 flow [2023-11-10 12:00:22,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 161.2) internal successors, (1612), 10 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:22,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:22,998 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2023-11-10 12:00:23,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-10 12:00:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:23,203 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-10 12:00:23,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash -117654321, now seen corresponding path program 2 times [2023-11-10 12:00:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:23,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571659298] [2023-11-10 12:00:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:23,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:23,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571659298] [2023-11-10 12:00:23,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571659298] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:23,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054939208] [2023-11-10 12:00:23,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:00:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:23,370 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 12:00:23,405 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 12:00:23,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:00:23,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:00:23,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 12:00:23,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:23,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054939208] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:23,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:23,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 12:00:23,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775127547] [2023-11-10 12:00:23,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:23,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 12:00:23,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:23,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 12:00:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 12:00:23,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 200 [2023-11-10 12:00:23,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 172 transitions, 394 flow. Second operand has 18 states, 18 states have (on average 161.33333333333334) internal successors, (2904), 18 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:23,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:23,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 200 [2023-11-10 12:00:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:23,917 INFO L124 PetriNetUnfolderBase]: 4/257 cut-off events. [2023-11-10 12:00:23,917 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-11-10 12:00:23,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 257 events. 4/257 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 659 event pairs, 0 based on Foata normal form. 4/250 useless extension candidates. Maximal degree in co-relation 224. Up to 11 conditions per place. [2023-11-10 12:00:23,920 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 21 selfloop transitions, 21 changer transitions 0/196 dead transitions. [2023-11-10 12:00:23,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 196 transitions, 586 flow [2023-11-10 12:00:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 12:00:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 12:00:23,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3385 transitions. [2023-11-10 12:00:23,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.805952380952381 [2023-11-10 12:00:23,927 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3385 transitions. [2023-11-10 12:00:23,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3385 transitions. [2023-11-10 12:00:23,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:23,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3385 transitions. [2023-11-10 12:00:23,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 161.1904761904762) internal successors, (3385), 21 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:23,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:23,940 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 200.0) internal successors, (4400), 22 states have internal predecessors, (4400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:23,940 INFO L175 Difference]: Start difference. First operand has 178 places, 172 transitions, 394 flow. Second operand 21 states and 3385 transitions. [2023-11-10 12:00:23,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 196 transitions, 586 flow [2023-11-10 12:00:23,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 196 transitions, 572 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:23,945 INFO L231 Difference]: Finished difference. Result has 202 places, 185 transitions, 518 flow [2023-11-10 12:00:23,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=518, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2023-11-10 12:00:23,947 INFO L281 CegarLoopForPetriNet]: 168 programPoint places, 34 predicate places. [2023-11-10 12:00:23,947 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 518 flow [2023-11-10 12:00:23,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 161.33333333333334) internal successors, (2904), 18 states have internal predecessors, (2904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:23,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:23,948 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2023-11-10 12:00:23,954 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 12:00:24,152 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,SelfDestructingSolverStorable2 [2023-11-10 12:00:24,153 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-10 12:00:24,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:24,154 INFO L85 PathProgramCache]: Analyzing trace with hash 444138511, now seen corresponding path program 3 times [2023-11-10 12:00:24,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:24,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291108421] [2023-11-10 12:00:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:24,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:24,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:24,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:24,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291108421] [2023-11-10 12:00:24,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291108421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:24,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034860275] [2023-11-10 12:00:24,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:00:24,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:24,418 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 12:00:24,421 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 12:00:24,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-10 12:00:24,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:00:24,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 12:00:24,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:24,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:24,733 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-10 12:00:24,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034860275] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:24,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:24,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-10 12:00:24,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541684987] [2023-11-10 12:00:24,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:24,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-10 12:00:24,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-10 12:00:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-10 12:00:24,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 200 [2023-11-10 12:00:24,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 185 transitions, 518 flow. Second operand has 23 states, 23 states have (on average 161.47826086956522) internal successors, (3714), 23 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:24,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:24,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 200 [2023-11-10 12:00:24,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:25,039 INFO L124 PetriNetUnfolderBase]: 4/272 cut-off events. [2023-11-10 12:00:25,040 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-10 12:00:25,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 272 events. 4/272 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 659 event pairs, 0 based on Foata normal form. 3/264 useless extension candidates. Maximal degree in co-relation 320. Up to 17 conditions per place. [2023-11-10 12:00:25,041 INFO L140 encePairwiseOnDemand]: 194/200 looper letters, 27 selfloop transitions, 30 changer transitions 0/211 dead transitions. [2023-11-10 12:00:25,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 211 transitions, 778 flow [2023-11-10 12:00:25,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-10 12:00:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-10 12:00:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 4830 transitions. [2023-11-10 12:00:25,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.805 [2023-11-10 12:00:25,065 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 4830 transitions. [2023-11-10 12:00:25,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 4830 transitions. [2023-11-10 12:00:25,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:25,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 4830 transitions. [2023-11-10 12:00:25,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 161.0) internal successors, (4830), 30 states have internal predecessors, (4830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,084 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 200.0) internal successors, (6200), 31 states have internal predecessors, (6200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,084 INFO L175 Difference]: Start difference. First operand has 202 places, 185 transitions, 518 flow. Second operand 30 states and 4830 transitions. [2023-11-10 12:00:25,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 211 transitions, 778 flow [2023-11-10 12:00:25,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 211 transitions, 748 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-10 12:00:25,089 INFO L231 Difference]: Finished difference. Result has 229 places, 195 transitions, 646 flow [2023-11-10 12:00:25,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=200, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=646, PETRI_PLACES=229, PETRI_TRANSITIONS=195} [2023-11-10 12:00:25,090 INFO L281 CegarLoopForPetriNet]: 168 programPoint places, 61 predicate places. [2023-11-10 12:00:25,090 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 195 transitions, 646 flow [2023-11-10 12:00:25,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 161.47826086956522) internal successors, (3714), 23 states have internal predecessors, (3714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:25,091 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2023-11-10 12:00:25,098 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 12:00:25,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:25,297 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-11-10 12:00:25,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash -842500600, now seen corresponding path program 4 times [2023-11-10 12:00:25,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:25,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451506160] [2023-11-10 12:00:25,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:25,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 12:00:25,324 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 12:00:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 12:00:25,359 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 12:00:25,359 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 12:00:25,360 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-11-10 12:00:25,361 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-11-10 12:00:25,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-11-10 12:00:25,362 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-11-10 12:00:25,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-10 12:00:25,362 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1] [2023-11-10 12:00:25,364 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 12:00:25,364 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-10 12:00:25,389 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 12:00:25,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 234 places, 274 transitions, 564 flow [2023-11-10 12:00:25,436 INFO L124 PetriNetUnfolderBase]: 75/450 cut-off events. [2023-11-10 12:00:25,436 INFO L125 PetriNetUnfolderBase]: For 6/7 co-relation queries the response was YES. [2023-11-10 12:00:25,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 462 conditions, 450 events. 75/450 cut-off events. For 6/7 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1830 event pairs, 0 based on Foata normal form. 0/366 useless extension candidates. Maximal degree in co-relation 277. Up to 12 conditions per place. [2023-11-10 12:00:25,440 INFO L82 GeneralOperation]: Start removeDead. Operand has 234 places, 274 transitions, 564 flow [2023-11-10 12:00:25,445 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 234 places, 274 transitions, 564 flow [2023-11-10 12:00:25,446 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 12:00:25,447 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;@4db3ff10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 12:00:25,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-10 12:00:25,454 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 12:00:25,454 INFO L124 PetriNetUnfolderBase]: 12/135 cut-off events. [2023-11-10 12:00:25,454 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 12:00:25,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:25,454 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] [2023-11-10 12:00:25,455 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-10 12:00:25,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:25,455 INFO L85 PathProgramCache]: Analyzing trace with hash -939140311, now seen corresponding path program 1 times [2023-11-10 12:00:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:25,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770168293] [2023-11-10 12:00:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:25,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:25,491 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 12:00:25,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:25,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770168293] [2023-11-10 12:00:25,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770168293] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:00:25,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 12:00:25,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 12:00:25,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684749029] [2023-11-10 12:00:25,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:00:25,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 12:00:25,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 12:00:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 12:00:25,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 274 [2023-11-10 12:00:25,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 274 transitions, 564 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:25,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 274 [2023-11-10 12:00:25,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:25,556 INFO L124 PetriNetUnfolderBase]: 9/383 cut-off events. [2023-11-10 12:00:25,556 INFO L125 PetriNetUnfolderBase]: For 18/21 co-relation queries the response was YES. [2023-11-10 12:00:25,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 418 conditions, 383 events. 9/383 cut-off events. For 18/21 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1489 event pairs, 0 based on Foata normal form. 134/496 useless extension candidates. Maximal degree in co-relation 254. Up to 19 conditions per place. [2023-11-10 12:00:25,560 INFO L140 encePairwiseOnDemand]: 232/274 looper letters, 15 selfloop transitions, 2 changer transitions 1/236 dead transitions. [2023-11-10 12:00:25,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 236 transitions, 522 flow [2023-11-10 12:00:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 12:00:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 12:00:25,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 715 transitions. [2023-11-10 12:00:25,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8698296836982968 [2023-11-10 12:00:25,563 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 715 transitions. [2023-11-10 12:00:25,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 715 transitions. [2023-11-10 12:00:25,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:25,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 715 transitions. [2023-11-10 12:00:25,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.33333333333334) internal successors, (715), 3 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,566 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,566 INFO L175 Difference]: Start difference. First operand has 234 places, 274 transitions, 564 flow. Second operand 3 states and 715 transitions. [2023-11-10 12:00:25,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 236 transitions, 522 flow [2023-11-10 12:00:25,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 236 transitions, 522 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 12:00:25,569 INFO L231 Difference]: Finished difference. Result has 234 places, 232 transitions, 490 flow [2023-11-10 12:00:25,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=490, PETRI_PLACES=234, PETRI_TRANSITIONS=232} [2023-11-10 12:00:25,572 INFO L281 CegarLoopForPetriNet]: 234 programPoint places, 0 predicate places. [2023-11-10 12:00:25,572 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 232 transitions, 490 flow [2023-11-10 12:00:25,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:25,573 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] [2023-11-10 12:00:25,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-10 12:00:25,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-10 12:00:25,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:25,573 INFO L85 PathProgramCache]: Analyzing trace with hash -411912016, now seen corresponding path program 1 times [2023-11-10 12:00:25,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:25,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737150480] [2023-11-10 12:00:25,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:25,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:25,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:25,639 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 12:00:25,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737150480] [2023-11-10 12:00:25,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737150480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719946670] [2023-11-10 12:00:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:25,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:25,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:25,641 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 12:00:25,666 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 12:00:25,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:25,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-10 12:00:25,716 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:25,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:25,721 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-10 12:00:25,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719946670] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:00:25,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-10 12:00:25,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-10 12:00:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711358121] [2023-11-10 12:00:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:00:25,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 12:00:25,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:25,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 12:00:25,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-10 12:00:25,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 274 [2023-11-10 12:00:25,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 232 transitions, 490 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:25,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 274 [2023-11-10 12:00:25,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:25,778 INFO L124 PetriNetUnfolderBase]: 7/335 cut-off events. [2023-11-10 12:00:25,780 INFO L125 PetriNetUnfolderBase]: For 34/67 co-relation queries the response was YES. [2023-11-10 12:00:25,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 381 conditions, 335 events. 7/335 cut-off events. For 34/67 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1152 event pairs, 0 based on Foata normal form. 1/320 useless extension candidates. Maximal degree in co-relation 348. Up to 22 conditions per place. [2023-11-10 12:00:25,788 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 15 selfloop transitions, 2 changer transitions 0/236 dead transitions. [2023-11-10 12:00:25,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 236 transitions, 532 flow [2023-11-10 12:00:25,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 12:00:25,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 12:00:25,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-11-10 12:00:25,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8211678832116789 [2023-11-10 12:00:25,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-11-10 12:00:25,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-11-10 12:00:25,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:25,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-11-10 12:00:25,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,792 INFO L175 Difference]: Start difference. First operand has 234 places, 232 transitions, 490 flow. Second operand 3 states and 675 transitions. [2023-11-10 12:00:25,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 236 transitions, 532 flow [2023-11-10 12:00:25,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 236 transitions, 530 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:25,797 INFO L231 Difference]: Finished difference. Result has 235 places, 233 transitions, 500 flow [2023-11-10 12:00:25,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=488, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=500, PETRI_PLACES=235, PETRI_TRANSITIONS=233} [2023-11-10 12:00:25,798 INFO L281 CegarLoopForPetriNet]: 234 programPoint places, 1 predicate places. [2023-11-10 12:00:25,799 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 233 transitions, 500 flow [2023-11-10 12:00:25,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:25,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:25,799 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:00:25,807 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 12:00:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:26,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-10 12:00:26,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:26,004 INFO L85 PathProgramCache]: Analyzing trace with hash 226925611, now seen corresponding path program 1 times [2023-11-10 12:00:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697758098] [2023-11-10 12:00:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:26,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:26,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:26,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697758098] [2023-11-10 12:00:26,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697758098] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:26,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959100579] [2023-11-10 12:00:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:26,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:26,081 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 12:00:26,111 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 12:00:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:26,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 12:00:26,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:26,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:26,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959100579] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:26,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:26,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 12:00:26,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549164236] [2023-11-10 12:00:26,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:26,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 12:00:26,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:26,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 12:00:26,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 12:00:26,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 274 [2023-11-10 12:00:26,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 233 transitions, 500 flow. Second operand has 10 states, 10 states have (on average 220.3) internal successors, (2203), 10 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:26,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:26,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 274 [2023-11-10 12:00:26,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:26,301 INFO L124 PetriNetUnfolderBase]: 7/342 cut-off events. [2023-11-10 12:00:26,302 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-11-10 12:00:26,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 342 events. 7/342 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1148 event pairs, 0 based on Foata normal form. 2/330 useless extension candidates. Maximal degree in co-relation 332. Up to 16 conditions per place. [2023-11-10 12:00:26,304 INFO L140 encePairwiseOnDemand]: 268/274 looper letters, 16 selfloop transitions, 9 changer transitions 0/243 dead transitions. [2023-11-10 12:00:26,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 243 transitions, 572 flow [2023-11-10 12:00:26,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 12:00:26,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 12:00:26,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1989 transitions. [2023-11-10 12:00:26,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8065693430656934 [2023-11-10 12:00:26,307 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1989 transitions. [2023-11-10 12:00:26,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1989 transitions. [2023-11-10 12:00:26,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:26,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1989 transitions. [2023-11-10 12:00:26,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 221.0) internal successors, (1989), 9 states have internal predecessors, (1989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:26,313 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:26,314 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 274.0) internal successors, (2740), 10 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:26,314 INFO L175 Difference]: Start difference. First operand has 235 places, 233 transitions, 500 flow. Second operand 9 states and 1989 transitions. [2023-11-10 12:00:26,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 243 transitions, 572 flow [2023-11-10 12:00:26,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 243 transitions, 570 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:26,333 INFO L231 Difference]: Finished difference. Result has 245 places, 239 transitions, 548 flow [2023-11-10 12:00:26,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=498, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=548, PETRI_PLACES=245, PETRI_TRANSITIONS=239} [2023-11-10 12:00:26,334 INFO L281 CegarLoopForPetriNet]: 234 programPoint places, 11 predicate places. [2023-11-10 12:00:26,334 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 239 transitions, 548 flow [2023-11-10 12:00:26,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 220.3) internal successors, (2203), 10 states have internal predecessors, (2203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:26,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:26,335 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 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] [2023-11-10 12:00:26,341 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 12:00:26,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:26,539 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-10 12:00:26,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:26,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1524486283, now seen corresponding path program 2 times [2023-11-10 12:00:26,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:26,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365981404] [2023-11-10 12:00:26,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:26,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:26,613 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:26,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365981404] [2023-11-10 12:00:26,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365981404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:26,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55934246] [2023-11-10 12:00:26,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:00:26,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:26,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:26,628 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 12:00:26,661 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 12:00:26,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:00:26,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:00:26,710 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 12:00:26,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:26,737 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:26,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55934246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:26,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:26,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 12:00:26,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618676103] [2023-11-10 12:00:26,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:26,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 12:00:26,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 12:00:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 12:00:26,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 274 [2023-11-10 12:00:26,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 239 transitions, 548 flow. Second operand has 18 states, 18 states have (on average 220.38888888888889) internal successors, (3967), 18 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:26,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:26,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 274 [2023-11-10 12:00:26,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:27,007 INFO L124 PetriNetUnfolderBase]: 7/362 cut-off events. [2023-11-10 12:00:27,007 INFO L125 PetriNetUnfolderBase]: For 39/42 co-relation queries the response was YES. [2023-11-10 12:00:27,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 362 events. 7/362 cut-off events. For 39/42 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1148 event pairs, 0 based on Foata normal form. 4/352 useless extension candidates. Maximal degree in co-relation 336. Up to 16 conditions per place. [2023-11-10 12:00:27,011 INFO L140 encePairwiseOnDemand]: 268/274 looper letters, 24 selfloop transitions, 21 changer transitions 0/263 dead transitions. [2023-11-10 12:00:27,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 263 transitions, 746 flow [2023-11-10 12:00:27,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 12:00:27,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 12:00:27,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4627 transitions. [2023-11-10 12:00:27,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8041362530413625 [2023-11-10 12:00:27,017 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4627 transitions. [2023-11-10 12:00:27,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4627 transitions. [2023-11-10 12:00:27,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:27,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4627 transitions. [2023-11-10 12:00:27,025 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 220.33333333333334) internal successors, (4627), 21 states have internal predecessors, (4627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:27,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:27,032 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 274.0) internal successors, (6028), 22 states have internal predecessors, (6028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:27,032 INFO L175 Difference]: Start difference. First operand has 245 places, 239 transitions, 548 flow. Second operand 21 states and 4627 transitions. [2023-11-10 12:00:27,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 263 transitions, 746 flow [2023-11-10 12:00:27,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 263 transitions, 732 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:27,040 INFO L231 Difference]: Finished difference. Result has 269 places, 252 transitions, 672 flow [2023-11-10 12:00:27,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=542, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=672, PETRI_PLACES=269, PETRI_TRANSITIONS=252} [2023-11-10 12:00:27,041 INFO L281 CegarLoopForPetriNet]: 234 programPoint places, 35 predicate places. [2023-11-10 12:00:27,041 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 252 transitions, 672 flow [2023-11-10 12:00:27,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 220.38888888888889) internal successors, (3967), 18 states have internal predecessors, (3967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:27,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:27,042 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 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] [2023-11-10 12:00:27,059 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 12:00:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:27,247 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-10 12:00:27,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2023248203, now seen corresponding path program 3 times [2023-11-10 12:00:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:27,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218225386] [2023-11-10 12:00:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:27,462 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218225386] [2023-11-10 12:00:27,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218225386] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:27,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960823866] [2023-11-10 12:00:27,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-10 12:00:27,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:27,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:27,464 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 12:00:27,477 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 12:00:27,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-10 12:00:27,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:00:27,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 12:00:27,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:27,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:27,805 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-10 12:00:27,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960823866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:27,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:27,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-10 12:00:27,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822216555] [2023-11-10 12:00:27,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:27,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-10 12:00:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:27,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-10 12:00:27,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-10 12:00:27,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 274 [2023-11-10 12:00:27,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 252 transitions, 672 flow. Second operand has 23 states, 23 states have (on average 220.52173913043478) internal successors, (5072), 23 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:27,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:27,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 274 [2023-11-10 12:00:27,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:28,085 INFO L124 PetriNetUnfolderBase]: 7/377 cut-off events. [2023-11-10 12:00:28,085 INFO L125 PetriNetUnfolderBase]: For 127/130 co-relation queries the response was YES. [2023-11-10 12:00:28,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589 conditions, 377 events. 7/377 cut-off events. For 127/130 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1149 event pairs, 0 based on Foata normal form. 3/366 useless extension candidates. Maximal degree in co-relation 413. Up to 17 conditions per place. [2023-11-10 12:00:28,089 INFO L140 encePairwiseOnDemand]: 268/274 looper letters, 30 selfloop transitions, 30 changer transitions 0/278 dead transitions. [2023-11-10 12:00:28,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 278 transitions, 938 flow [2023-11-10 12:00:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-10 12:00:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-10 12:00:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 6603 transitions. [2023-11-10 12:00:28,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8032846715328467 [2023-11-10 12:00:28,098 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 6603 transitions. [2023-11-10 12:00:28,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 6603 transitions. [2023-11-10 12:00:28,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:28,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 6603 transitions. [2023-11-10 12:00:28,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 220.1) internal successors, (6603), 30 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 274.0) internal successors, (8494), 31 states have internal predecessors, (8494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,120 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 274.0) internal successors, (8494), 31 states have internal predecessors, (8494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,120 INFO L175 Difference]: Start difference. First operand has 269 places, 252 transitions, 672 flow. Second operand 30 states and 6603 transitions. [2023-11-10 12:00:28,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 278 transitions, 938 flow [2023-11-10 12:00:28,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 278 transitions, 908 flow, removed 9 selfloop flow, removed 6 redundant places. [2023-11-10 12:00:28,124 INFO L231 Difference]: Finished difference. Result has 296 places, 262 transitions, 800 flow [2023-11-10 12:00:28,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=648, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=800, PETRI_PLACES=296, PETRI_TRANSITIONS=262} [2023-11-10 12:00:28,146 INFO L281 CegarLoopForPetriNet]: 234 programPoint places, 62 predicate places. [2023-11-10 12:00:28,146 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 262 transitions, 800 flow [2023-11-10 12:00:28,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 220.52173913043478) internal successors, (5072), 23 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:28,147 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 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] [2023-11-10 12:00:28,163 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 12:00:28,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:28,348 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-11-10 12:00:28,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:28,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1557811214, now seen corresponding path program 4 times [2023-11-10 12:00:28,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:28,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859645069] [2023-11-10 12:00:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:28,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 12:00:28,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 12:00:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 12:00:28,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 12:00:28,402 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 12:00:28,402 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-11-10 12:00:28,402 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-11-10 12:00:28,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-11-10 12:00:28,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-11-10 12:00:28,403 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-11-10 12:00:28,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-10 12:00:28,403 INFO L445 BasicCegarLoop]: Path program histogram: [4, 1, 1] [2023-11-10 12:00:28,403 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 12:00:28,403 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-10 12:00:28,428 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-10 12:00:28,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 296 places, 348 transitions, 723 flow [2023-11-10 12:00:28,519 INFO L124 PetriNetUnfolderBase]: 110/660 cut-off events. [2023-11-10 12:00:28,520 INFO L125 PetriNetUnfolderBase]: For 19/21 co-relation queries the response was YES. [2023-11-10 12:00:28,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 685 conditions, 660 events. 110/660 cut-off events. For 19/21 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2951 event pairs, 1 based on Foata normal form. 0/539 useless extension candidates. Maximal degree in co-relation 458. Up to 16 conditions per place. [2023-11-10 12:00:28,525 INFO L82 GeneralOperation]: Start removeDead. Operand has 296 places, 348 transitions, 723 flow [2023-11-10 12:00:28,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 296 places, 348 transitions, 723 flow [2023-11-10 12:00:28,532 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 12:00:28,532 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;@4db3ff10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 12:00:28,532 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-11-10 12:00:28,538 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 12:00:28,538 INFO L124 PetriNetUnfolderBase]: 12/135 cut-off events. [2023-11-10 12:00:28,538 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 12:00:28,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:28,538 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] [2023-11-10 12:00:28,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-10 12:00:28,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:28,540 INFO L85 PathProgramCache]: Analyzing trace with hash 565561477, now seen corresponding path program 1 times [2023-11-10 12:00:28,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:28,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222147442] [2023-11-10 12:00:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:28,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:28,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:28,568 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 12:00:28,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:28,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222147442] [2023-11-10 12:00:28,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222147442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:00:28,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 12:00:28,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 12:00:28,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085498423] [2023-11-10 12:00:28,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:00:28,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 12:00:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 12:00:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 12:00:28,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 348 [2023-11-10 12:00:28,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 348 transitions, 723 flow. Second operand has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:28,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 348 [2023-11-10 12:00:28,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:28,664 INFO L124 PetriNetUnfolderBase]: 16/563 cut-off events. [2023-11-10 12:00:28,664 INFO L125 PetriNetUnfolderBase]: For 52/63 co-relation queries the response was YES. [2023-11-10 12:00:28,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 624 conditions, 563 events. 16/563 cut-off events. For 52/63 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2574 event pairs, 1 based on Foata normal form. 346/878 useless extension candidates. Maximal degree in co-relation 413. Up to 32 conditions per place. [2023-11-10 12:00:28,673 INFO L140 encePairwiseOnDemand]: 294/348 looper letters, 17 selfloop transitions, 2 changer transitions 1/297 dead transitions. [2023-11-10 12:00:28,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 297 transitions, 659 flow [2023-11-10 12:00:28,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 12:00:28,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 12:00:28,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 906 transitions. [2023-11-10 12:00:28,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.867816091954023 [2023-11-10 12:00:28,675 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 906 transitions. [2023-11-10 12:00:28,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 906 transitions. [2023-11-10 12:00:28,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:28,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 906 transitions. [2023-11-10 12:00:28,676 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.0) internal successors, (906), 3 states have internal predecessors, (906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,677 INFO L175 Difference]: Start difference. First operand has 296 places, 348 transitions, 723 flow. Second operand 3 states and 906 transitions. [2023-11-10 12:00:28,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 297 transitions, 659 flow [2023-11-10 12:00:28,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 297 transitions, 659 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 12:00:28,681 INFO L231 Difference]: Finished difference. Result has 295 places, 293 transitions, 623 flow [2023-11-10 12:00:28,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=623, PETRI_PLACES=295, PETRI_TRANSITIONS=293} [2023-11-10 12:00:28,683 INFO L281 CegarLoopForPetriNet]: 296 programPoint places, -1 predicate places. [2023-11-10 12:00:28,683 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 293 transitions, 623 flow [2023-11-10 12:00:28,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:28,683 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] [2023-11-10 12:00:28,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-10 12:00:28,684 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-10 12:00:28,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:28,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1618489136, now seen corresponding path program 1 times [2023-11-10 12:00:28,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:28,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996424966] [2023-11-10 12:00:28,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:28,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:28,723 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 12:00:28,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996424966] [2023-11-10 12:00:28,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996424966] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:28,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586954548] [2023-11-10 12:00:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:28,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:28,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:28,739 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 12:00:28,740 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 12:00:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:28,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-10 12:00:28,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:28,819 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-10 12:00:28,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586954548] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:00:28,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-10 12:00:28,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2023-11-10 12:00:28,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071499240] [2023-11-10 12:00:28,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:00:28,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 12:00:28,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:28,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 12:00:28,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-10 12:00:28,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 278 out of 348 [2023-11-10 12:00:28,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 293 transitions, 623 flow. Second operand has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:28,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 278 of 348 [2023-11-10 12:00:28,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:28,897 INFO L124 PetriNetUnfolderBase]: 14/515 cut-off events. [2023-11-10 12:00:28,897 INFO L125 PetriNetUnfolderBase]: For 63/118 co-relation queries the response was YES. [2023-11-10 12:00:28,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 593 conditions, 515 events. 14/515 cut-off events. For 63/118 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2222 event pairs, 1 based on Foata normal form. 1/490 useless extension candidates. Maximal degree in co-relation 559. Up to 41 conditions per place. [2023-11-10 12:00:28,906 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 17 selfloop transitions, 2 changer transitions 0/297 dead transitions. [2023-11-10 12:00:28,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 297 transitions, 669 flow [2023-11-10 12:00:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 12:00:28,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 12:00:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 854 transitions. [2023-11-10 12:00:28,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8180076628352491 [2023-11-10 12:00:28,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 854 transitions. [2023-11-10 12:00:28,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 854 transitions. [2023-11-10 12:00:28,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:28,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 854 transitions. [2023-11-10 12:00:28,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 284.6666666666667) internal successors, (854), 3 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,909 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,909 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,909 INFO L175 Difference]: Start difference. First operand has 295 places, 293 transitions, 623 flow. Second operand 3 states and 854 transitions. [2023-11-10 12:00:28,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 297 transitions, 669 flow [2023-11-10 12:00:28,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 297 transitions, 667 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:28,913 INFO L231 Difference]: Finished difference. Result has 296 places, 294 transitions, 633 flow [2023-11-10 12:00:28,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=633, PETRI_PLACES=296, PETRI_TRANSITIONS=294} [2023-11-10 12:00:28,914 INFO L281 CegarLoopForPetriNet]: 296 programPoint places, 0 predicate places. [2023-11-10 12:00:28,914 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 294 transitions, 633 flow [2023-11-10 12:00:28,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 279.3333333333333) internal successors, (838), 3 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:28,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:28,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:00:28,936 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 12:00:29,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-10 12:00:29,119 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-10 12:00:29,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:29,120 INFO L85 PathProgramCache]: Analyzing trace with hash 463051119, now seen corresponding path program 1 times [2023-11-10 12:00:29,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:29,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812723565] [2023-11-10 12:00:29,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:29,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:29,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:29,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812723565] [2023-11-10 12:00:29,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812723565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:29,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701119923] [2023-11-10 12:00:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:29,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:29,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:29,156 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 12:00:29,185 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 12:00:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:29,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 12:00:29,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:29,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:29,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:29,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701119923] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:29,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:29,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 12:00:29,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629082061] [2023-11-10 12:00:29,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 12:00:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 12:00:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 12:00:29,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 348 [2023-11-10 12:00:29,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 294 transitions, 633 flow. Second operand has 10 states, 10 states have (on average 279.2) internal successors, (2792), 10 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:29,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:29,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 348 [2023-11-10 12:00:29,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:29,427 INFO L124 PetriNetUnfolderBase]: 14/522 cut-off events. [2023-11-10 12:00:29,427 INFO L125 PetriNetUnfolderBase]: For 51/58 co-relation queries the response was YES. [2023-11-10 12:00:29,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 522 events. 14/522 cut-off events. For 51/58 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2217 event pairs, 1 based on Foata normal form. 2/501 useless extension candidates. Maximal degree in co-relation 539. Up to 29 conditions per place. [2023-11-10 12:00:29,436 INFO L140 encePairwiseOnDemand]: 342/348 looper letters, 18 selfloop transitions, 9 changer transitions 0/304 dead transitions. [2023-11-10 12:00:29,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 304 transitions, 709 flow [2023-11-10 12:00:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 12:00:29,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 12:00:29,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2522 transitions. [2023-11-10 12:00:29,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8052362707535121 [2023-11-10 12:00:29,438 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2522 transitions. [2023-11-10 12:00:29,438 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2522 transitions. [2023-11-10 12:00:29,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:29,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2522 transitions. [2023-11-10 12:00:29,442 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 280.22222222222223) internal successors, (2522), 9 states have internal predecessors, (2522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:29,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 348.0) internal successors, (3480), 10 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:29,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 348.0) internal successors, (3480), 10 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:29,445 INFO L175 Difference]: Start difference. First operand has 296 places, 294 transitions, 633 flow. Second operand 9 states and 2522 transitions. [2023-11-10 12:00:29,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 304 transitions, 709 flow [2023-11-10 12:00:29,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 304 transitions, 707 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:29,449 INFO L231 Difference]: Finished difference. Result has 306 places, 300 transitions, 681 flow [2023-11-10 12:00:29,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=294, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=681, PETRI_PLACES=306, PETRI_TRANSITIONS=300} [2023-11-10 12:00:29,449 INFO L281 CegarLoopForPetriNet]: 296 programPoint places, 10 predicate places. [2023-11-10 12:00:29,450 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 300 transitions, 681 flow [2023-11-10 12:00:29,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 279.2) internal successors, (2792), 10 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:29,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:29,450 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:00:29,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-10 12:00:29,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-10 12:00:29,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-10 12:00:29,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1322448241, now seen corresponding path program 2 times [2023-11-10 12:00:29,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:29,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273072842] [2023-11-10 12:00:29,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:29,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:29,698 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-10 12:00:29,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273072842] [2023-11-10 12:00:29,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273072842] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:29,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410482911] [2023-11-10 12:00:29,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-10 12:00:29,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:29,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:29,713 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 12:00:29,753 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 12:00:29,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-10 12:00:29,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-10 12:00:29,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 12:00:29,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:29,879 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:29,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:29,957 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-10 12:00:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410482911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:29,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:29,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 19 [2023-11-10 12:00:29,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848753826] [2023-11-10 12:00:29,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:29,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-10 12:00:29,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:29,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-10 12:00:29,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-11-10 12:00:29,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 269 out of 348 [2023-11-10 12:00:29,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 300 transitions, 681 flow. Second operand has 19 states, 19 states have (on average 272.2105263157895) internal successors, (5172), 19 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:29,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:29,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 269 of 348 [2023-11-10 12:00:29,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:30,277 INFO L124 PetriNetUnfolderBase]: 12/495 cut-off events. [2023-11-10 12:00:30,277 INFO L125 PetriNetUnfolderBase]: For 87/125 co-relation queries the response was YES. [2023-11-10 12:00:30,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 495 events. 12/495 cut-off events. For 87/125 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1790 event pairs, 2 based on Foata normal form. 6/480 useless extension candidates. Maximal degree in co-relation 517. Up to 40 conditions per place. [2023-11-10 12:00:30,302 INFO L140 encePairwiseOnDemand]: 337/348 looper letters, 38 selfloop transitions, 26 changer transitions 0/332 dead transitions. [2023-11-10 12:00:30,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 332 transitions, 935 flow [2023-11-10 12:00:30,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-10 12:00:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-11-10 12:00:30,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 6794 transitions. [2023-11-10 12:00:30,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7809195402298851 [2023-11-10 12:00:30,307 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 6794 transitions. [2023-11-10 12:00:30,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 6794 transitions. [2023-11-10 12:00:30,309 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:30,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 6794 transitions. [2023-11-10 12:00:30,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 271.76) internal successors, (6794), 25 states have internal predecessors, (6794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:30,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 348.0) internal successors, (9048), 26 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:30,326 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 348.0) internal successors, (9048), 26 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:30,326 INFO L175 Difference]: Start difference. First operand has 306 places, 300 transitions, 681 flow. Second operand 25 states and 6794 transitions. [2023-11-10 12:00:30,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 332 transitions, 935 flow [2023-11-10 12:00:30,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 332 transitions, 921 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 12:00:30,348 INFO L231 Difference]: Finished difference. Result has 337 places, 316 transitions, 839 flow [2023-11-10 12:00:30,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=839, PETRI_PLACES=337, PETRI_TRANSITIONS=316} [2023-11-10 12:00:30,349 INFO L281 CegarLoopForPetriNet]: 296 programPoint places, 41 predicate places. [2023-11-10 12:00:30,349 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 316 transitions, 839 flow [2023-11-10 12:00:30,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 272.2105263157895) internal successors, (5172), 19 states have internal predecessors, (5172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:30,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:30,350 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:00:30,372 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 12:00:30,569 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,SelfDestructingSolverStorable14 [2023-11-10 12:00:30,570 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-10 12:00:30,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:30,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1661110875, now seen corresponding path program 1 times [2023-11-10 12:00:30,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:30,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189569457] [2023-11-10 12:00:30,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:30,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:00:30,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:30,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189569457] [2023-11-10 12:00:30,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189569457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 12:00:30,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398763291] [2023-11-10 12:00:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:30,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 12:00:30,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 12:00:30,797 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 12:00:30,805 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 12:00:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:30,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 12:00:30,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 12:00:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:00:30,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 12:00:31,090 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 12:00:31,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398763291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 12:00:31,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 12:00:31,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2023-11-10 12:00:31,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843976635] [2023-11-10 12:00:31,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 12:00:31,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-10 12:00:31,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:31,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-10 12:00:31,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2023-11-10 12:00:31,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 277 out of 348 [2023-11-10 12:00:31,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 316 transitions, 839 flow. Second operand has 23 states, 23 states have (on average 279.4782608695652) internal successors, (6428), 23 states have internal predecessors, (6428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:31,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:31,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 277 of 348 [2023-11-10 12:00:31,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 12:00:31,401 INFO L124 PetriNetUnfolderBase]: 12/510 cut-off events. [2023-11-10 12:00:31,402 INFO L125 PetriNetUnfolderBase]: For 169/172 co-relation queries the response was YES. [2023-11-10 12:00:31,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 510 events. 12/510 cut-off events. For 169/172 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1794 event pairs, 2 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 538. Up to 29 conditions per place. [2023-11-10 12:00:31,411 INFO L140 encePairwiseOnDemand]: 342/348 looper letters, 32 selfloop transitions, 30 changer transitions 0/342 dead transitions. [2023-11-10 12:00:31,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 342 transitions, 1109 flow [2023-11-10 12:00:31,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-10 12:00:31,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-10 12:00:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8375 transitions. [2023-11-10 12:00:31,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8022030651340997 [2023-11-10 12:00:31,417 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8375 transitions. [2023-11-10 12:00:31,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8375 transitions. [2023-11-10 12:00:31,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 12:00:31,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8375 transitions. [2023-11-10 12:00:31,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 279.1666666666667) internal successors, (8375), 30 states have internal predecessors, (8375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:31,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 348.0) internal successors, (10788), 31 states have internal predecessors, (10788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:31,438 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 348.0) internal successors, (10788), 31 states have internal predecessors, (10788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:31,438 INFO L175 Difference]: Start difference. First operand has 337 places, 316 transitions, 839 flow. Second operand 30 states and 8375 transitions. [2023-11-10 12:00:31,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 342 transitions, 1109 flow [2023-11-10 12:00:31,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 342 transitions, 1075 flow, removed 10 selfloop flow, removed 7 redundant places. [2023-11-10 12:00:31,444 INFO L231 Difference]: Finished difference. Result has 363 places, 326 transitions, 963 flow [2023-11-10 12:00:31,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=963, PETRI_PLACES=363, PETRI_TRANSITIONS=326} [2023-11-10 12:00:31,446 INFO L281 CegarLoopForPetriNet]: 296 programPoint places, 67 predicate places. [2023-11-10 12:00:31,446 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 326 transitions, 963 flow [2023-11-10 12:00:31,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 279.4782608695652) internal successors, (6428), 23 states have internal predecessors, (6428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:31,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 12:00:31,447 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 12:00:31,473 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 12:00:31,653 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,SelfDestructingSolverStorable15 [2023-11-10 12:00:31,653 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-11-10 12:00:31,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 12:00:31,654 INFO L85 PathProgramCache]: Analyzing trace with hash -962584218, now seen corresponding path program 2 times [2023-11-10 12:00:31,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 12:00:31,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503367355] [2023-11-10 12:00:31,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 12:00:31,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 12:00:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 12:00:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-11-10 12:00:32,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 12:00:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503367355] [2023-11-10 12:00:32,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503367355] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 12:00:32,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 12:00:32,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-11-10 12:00:32,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423054601] [2023-11-10 12:00:32,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 12:00:32,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-10 12:00:32,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 12:00:32,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-10 12:00:32,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-10 12:00:32,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 348 [2023-11-10 12:00:32,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 326 transitions, 963 flow. Second operand has 13 states, 13 states have (on average 207.23076923076923) internal successors, (2694), 13 states have internal predecessors, (2694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 12:00:32,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 12:00:32,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 348 [2023-11-10 12:00:32,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand