/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_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 11:57:38,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 11:57:38,541 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-11-10 11:57:38,575 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 11:57:38,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 11:57:38,576 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 11:57:38,576 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 11:57:38,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 11:57:38,577 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 11:57:38,580 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 11:57:38,580 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 11:57:38,580 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 11:57:38,580 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 11:57:38,581 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 11:57:38,581 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 11:57:38,582 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 11:57:38,582 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 11:57:38,582 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 11:57:38,582 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 11:57:38,582 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 11:57:38,582 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 11:57:38,583 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 11:57:38,583 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 11:57:38,583 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 11:57:38,583 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 11:57:38,584 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:57:38,585 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 11:57:38,585 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 11:57:38,585 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 11:57:38,585 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 11:57:38,586 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 11:57:38,586 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 11:57:38,586 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 11:57:38,586 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 11:57:38,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 11:57:38,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 11:57:38,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 11:57:38,780 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 11:57:38,780 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 11:57:38,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-10 11:57:39,705 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 11:57:39,935 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 11:57:39,936 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-10 11:57:39,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0bb05f7/391d2debf6e74b368cc2dc549c6163de/FLAG1c6d701e7 [2023-11-10 11:57:39,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0f0bb05f7/391d2debf6e74b368cc2dc549c6163de [2023-11-10 11:57:39,964 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 11:57:39,965 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 11:57:39,965 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 11:57:39,965 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 11:57:39,970 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 11:57:39,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:57:39" (1/1) ... [2023-11-10 11:57:39,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f8668d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:39, skipping insertion in model container [2023-11-10 11:57:39,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:57:39" (1/1) ... [2023-11-10 11:57:40,012 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 11:57:40,200 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_24-sound_lock_racing.i[30176,30189] [2023-11-10 11:57:40,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:57:40,238 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 11:57:40,266 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_24-sound_lock_racing.i[30176,30189] [2023-11-10 11:57:40,271 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:57:40,296 INFO L206 MainTranslator]: Completed translation [2023-11-10 11:57:40,297 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40 WrapperNode [2023-11-10 11:57:40,297 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 11:57:40,297 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 11:57:40,298 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 11:57:40,298 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 11:57:40,303 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,314 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,331 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-10 11:57:40,332 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 11:57:40,332 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 11:57:40,332 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 11:57:40,332 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 11:57:40,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,339 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,339 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,346 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,349 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,350 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,351 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 11:57:40,352 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 11:57:40,352 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 11:57:40,352 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 11:57:40,352 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (1/1) ... [2023-11-10 11:57:40,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:57:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:40,375 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-10 11:57:40,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-10 11:57:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 11:57:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 11:57:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-10 11:57:40,402 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 11:57:40,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 11:57:40,403 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-10 11:57:40,403 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-10 11:57:40,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 11:57:40,403 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 11:57:40,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 11:57:40,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 11:57:40,404 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-10 11:57:40,487 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 11:57:40,489 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 11:57:40,640 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 11:57:40,646 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 11:57:40,647 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-10 11:57:40,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:57:40 BoogieIcfgContainer [2023-11-10 11:57:40,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 11:57:40,650 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 11:57:40,650 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 11:57:40,652 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 11:57:40,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 11:57:39" (1/3) ... [2023-11-10 11:57:40,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae8e79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:57:40, skipping insertion in model container [2023-11-10 11:57:40,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:57:40" (2/3) ... [2023-11-10 11:57:40,653 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae8e79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:57:40, skipping insertion in model container [2023-11-10 11:57:40,653 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:57:40" (3/3) ... [2023-11-10 11:57:40,654 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-10 11:57:40,665 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 11:57:40,665 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-10 11:57:40,665 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 11:57:40,700 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-10 11:57:40,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 118 transitions, 243 flow [2023-11-10 11:57:40,810 INFO L124 PetriNetUnfolderBase]: 18/156 cut-off events. [2023-11-10 11:57:40,810 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 11:57:40,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161 conditions, 156 events. 18/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 342 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 78. Up to 4 conditions per place. [2023-11-10 11:57:40,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 108 places, 118 transitions, 243 flow [2023-11-10 11:57:40,822 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 104 places, 113 transitions, 230 flow [2023-11-10 11:57:40,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:57:40,838 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;@707542e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:57:40,838 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:57:40,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:57:40,902 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-10 11:57:40,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:40,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:40,903 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 11:57:40,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:40,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -81979006, now seen corresponding path program 1 times [2023-11-10 11:57:40,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:40,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716011838] [2023-11-10 11:57:40,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:40,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:41,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:41,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716011838] [2023-11-10 11:57:41,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716011838] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:41,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:41,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:57:41,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349217213] [2023-11-10 11:57:41,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:41,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:57:41,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:57:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:57:41,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 118 [2023-11-10 11:57:41,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 113 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:41,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 118 [2023-11-10 11:57:41,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:41,350 INFO L124 PetriNetUnfolderBase]: 1/105 cut-off events. [2023-11-10 11:57:41,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:41,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122 conditions, 105 events. 1/105 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 79 event pairs, 0 based on Foata normal form. 30/131 useless extension candidates. Maximal degree in co-relation 48. Up to 8 conditions per place. [2023-11-10 11:57:41,352 INFO L140 encePairwiseOnDemand]: 104/118 looper letters, 9 selfloop transitions, 2 changer transitions 17/103 dead transitions. [2023-11-10 11:57:41,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 103 transitions, 234 flow [2023-11-10 11:57:41,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-11-10 11:57:41,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8926553672316384 [2023-11-10 11:57:41,365 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-11-10 11:57:41,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-11-10 11:57:41,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:41,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-11-10 11:57:41,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,376 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 118.0) internal successors, (472), 4 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,378 INFO L175 Difference]: Start difference. First operand has 104 places, 113 transitions, 230 flow. Second operand 3 states and 316 transitions. [2023-11-10 11:57:41,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 103 transitions, 234 flow [2023-11-10 11:57:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 103 transitions, 234 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:41,384 INFO L231 Difference]: Finished difference. Result has 106 places, 84 transitions, 180 flow [2023-11-10 11:57:41,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=118, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=106, PETRI_TRANSITIONS=84} [2023-11-10 11:57:41,390 INFO L281 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2023-11-10 11:57:41,390 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 84 transitions, 180 flow [2023-11-10 11:57:41,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:41,391 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 11:57:41,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 11:57:41,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:41,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:41,392 INFO L85 PathProgramCache]: Analyzing trace with hash 223945777, now seen corresponding path program 1 times [2023-11-10 11:57:41,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:41,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169253836] [2023-11-10 11:57:41,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:41,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:41,445 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:57:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:41,532 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:57:41,533 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:57:41,534 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:57:41,536 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:57:41,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-10 11:57:41,536 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-10 11:57:41,539 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:57:41,539 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-10 11:57:41,577 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 11:57:41,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 148 transitions, 312 flow [2023-11-10 11:57:41,648 INFO L124 PetriNetUnfolderBase]: 32/250 cut-off events. [2023-11-10 11:57:41,648 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-10 11:57:41,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 250 events. 32/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 699 event pairs, 0 based on Foata normal form. 0/211 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2023-11-10 11:57:41,653 INFO L82 GeneralOperation]: Start removeDead. Operand has 133 places, 148 transitions, 312 flow [2023-11-10 11:57:41,657 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 148 transitions, 312 flow [2023-11-10 11:57:41,664 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:57:41,665 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;@707542e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:57:41,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:57:41,679 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:57:41,679 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-10 11:57:41,679 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:41,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:41,680 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 11:57:41,680 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:41,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:41,681 INFO L85 PathProgramCache]: Analyzing trace with hash 163012118, now seen corresponding path program 1 times [2023-11-10 11:57:41,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582171014] [2023-11-10 11:57:41,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:41,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:41,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:41,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:41,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582171014] [2023-11-10 11:57:41,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582171014] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:41,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:41,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:57:41,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352729077] [2023-11-10 11:57:41,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:41,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:57:41,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:41,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:57:41,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:57:41,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 148 [2023-11-10 11:57:41,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 148 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:41,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 148 [2023-11-10 11:57:41,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:41,899 INFO L124 PetriNetUnfolderBase]: 3/201 cut-off events. [2023-11-10 11:57:41,900 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-10 11:57:41,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 240 conditions, 201 events. 3/201 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 422 event pairs, 0 based on Foata normal form. 110/302 useless extension candidates. Maximal degree in co-relation 136. Up to 22 conditions per place. [2023-11-10 11:57:41,903 INFO L140 encePairwiseOnDemand]: 128/148 looper letters, 12 selfloop transitions, 2 changer transitions 23/134 dead transitions. [2023-11-10 11:57:41,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 134 transitions, 318 flow [2023-11-10 11:57:41,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 393 transitions. [2023-11-10 11:57:41,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8851351351351351 [2023-11-10 11:57:41,911 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 393 transitions. [2023-11-10 11:57:41,912 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 393 transitions. [2023-11-10 11:57:41,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:41,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 393 transitions. [2023-11-10 11:57:41,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 148.0) internal successors, (592), 4 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,917 INFO L175 Difference]: Start difference. First operand has 133 places, 148 transitions, 312 flow. Second operand 3 states and 393 transitions. [2023-11-10 11:57:41,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 134 transitions, 318 flow [2023-11-10 11:57:41,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 134 transitions, 318 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:41,919 INFO L231 Difference]: Finished difference. Result has 135 places, 108 transitions, 236 flow [2023-11-10 11:57:41,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=135, PETRI_TRANSITIONS=108} [2023-11-10 11:57:41,920 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, 2 predicate places. [2023-11-10 11:57:41,920 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 108 transitions, 236 flow [2023-11-10 11:57:41,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.33333333333333) internal successors, (355), 3 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:41,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:41,921 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] [2023-11-10 11:57:41,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-10 11:57:41,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:41,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1963136136, now seen corresponding path program 1 times [2023-11-10 11:57:41,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:41,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988209684] [2023-11-10 11:57:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:41,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:42,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:42,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:42,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988209684] [2023-11-10 11:57:42,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988209684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:42,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125948436] [2023-11-10 11:57:42,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:42,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:42,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:42,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:57:42,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-10 11:57:42,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:42,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:57:42,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:42,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:42,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:42,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125948436] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:42,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:42,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:57:42,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529919758] [2023-11-10 11:57:42,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:57:42,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:42,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:57:42,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:57:42,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 148 [2023-11-10 11:57:42,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 108 transitions, 236 flow. Second operand has 10 states, 10 states have (on average 118.4) internal successors, (1184), 10 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:42,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 148 [2023-11-10 11:57:42,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:42,370 INFO L124 PetriNetUnfolderBase]: 1/109 cut-off events. [2023-11-10 11:57:42,370 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-10 11:57:42,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 109 events. 1/109 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 85 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 91. Up to 4 conditions per place. [2023-11-10 11:57:42,370 INFO L140 encePairwiseOnDemand]: 143/148 looper letters, 9 selfloop transitions, 7 changer transitions 0/103 dead transitions. [2023-11-10 11:57:42,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 103 transitions, 256 flow [2023-11-10 11:57:42,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:57:42,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:57:42,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1062 transitions. [2023-11-10 11:57:42,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7972972972972973 [2023-11-10 11:57:42,373 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1062 transitions. [2023-11-10 11:57:42,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1062 transitions. [2023-11-10 11:57:42,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:42,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1062 transitions. [2023-11-10 11:57:42,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.0) internal successors, (1062), 9 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,380 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 148.0) internal successors, (1480), 10 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,380 INFO L175 Difference]: Start difference. First operand has 135 places, 108 transitions, 236 flow. Second operand 9 states and 1062 transitions. [2023-11-10 11:57:42,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 103 transitions, 256 flow [2023-11-10 11:57:42,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 103 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:42,384 INFO L231 Difference]: Finished difference. Result has 110 places, 99 transitions, 228 flow [2023-11-10 11:57:42,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=148, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=228, PETRI_PLACES=110, PETRI_TRANSITIONS=99} [2023-11-10 11:57:42,386 INFO L281 CegarLoopForPetriNet]: 133 programPoint places, -23 predicate places. [2023-11-10 11:57:42,386 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 99 transitions, 228 flow [2023-11-10 11:57:42,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 118.4) internal successors, (1184), 10 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:42,387 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 11:57:42,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-10 11:57:42,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:42,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:42,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:42,609 INFO L85 PathProgramCache]: Analyzing trace with hash 44093472, now seen corresponding path program 1 times [2023-11-10 11:57:42,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:42,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974349040] [2023-11-10 11:57:42,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:42,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:42,623 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:57:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:42,634 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:57:42,634 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:57:42,634 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:57:42,634 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:57:42,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-10 11:57:42,635 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:57:42,635 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:57:42,635 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-10 11:57:42,650 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-10 11:57:42,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 178 transitions, 383 flow [2023-11-10 11:57:42,676 INFO L124 PetriNetUnfolderBase]: 51/379 cut-off events. [2023-11-10 11:57:42,677 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:57:42,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 404 conditions, 379 events. 51/379 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1215 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 258. Up to 16 conditions per place. [2023-11-10 11:57:42,679 INFO L82 GeneralOperation]: Start removeDead. Operand has 158 places, 178 transitions, 383 flow [2023-11-10 11:57:42,680 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 178 transitions, 383 flow [2023-11-10 11:57:42,681 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:57:42,682 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;@707542e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:57:42,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:57:42,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:57:42,687 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-10 11:57:42,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:42,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:42,687 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 11:57:42,687 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:42,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:42,687 INFO L85 PathProgramCache]: Analyzing trace with hash 167463112, now seen corresponding path program 1 times [2023-11-10 11:57:42,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257369216] [2023-11-10 11:57:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257369216] [2023-11-10 11:57:42,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257369216] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:42,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:42,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:57:42,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036265708] [2023-11-10 11:57:42,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:42,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:57:42,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:42,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:57:42,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:57:42,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 178 [2023-11-10 11:57:42,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 178 transitions, 383 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:42,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 178 [2023-11-10 11:57:42,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:42,786 INFO L124 PetriNetUnfolderBase]: 8/315 cut-off events. [2023-11-10 11:57:42,786 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-10 11:57:42,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 315 events. 8/315 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 903 event pairs, 1 based on Foata normal form. 292/592 useless extension candidates. Maximal degree in co-relation 235. Up to 41 conditions per place. [2023-11-10 11:57:42,788 INFO L140 encePairwiseOnDemand]: 152/178 looper letters, 13 selfloop transitions, 2 changer transitions 24/158 dead transitions. [2023-11-10 11:57:42,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 158 transitions, 381 flow [2023-11-10 11:57:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:42,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-11-10 11:57:42,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8745318352059925 [2023-11-10 11:57:42,790 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-11-10 11:57:42,790 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-11-10 11:57:42,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:42,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-11-10 11:57:42,791 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 178.0) internal successors, (712), 4 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,792 INFO L175 Difference]: Start difference. First operand has 158 places, 178 transitions, 383 flow. Second operand 3 states and 467 transitions. [2023-11-10 11:57:42,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 158 transitions, 381 flow [2023-11-10 11:57:42,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 158 transitions, 381 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:42,797 INFO L231 Difference]: Finished difference. Result has 160 places, 131 transitions, 290 flow [2023-11-10 11:57:42,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=160, PETRI_TRANSITIONS=131} [2023-11-10 11:57:42,799 INFO L281 CegarLoopForPetriNet]: 158 programPoint places, 2 predicate places. [2023-11-10 11:57:42,799 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 131 transitions, 290 flow [2023-11-10 11:57:42,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:42,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:42,799 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] [2023-11-10 11:57:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-10 11:57:42,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:42,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:42,800 INFO L85 PathProgramCache]: Analyzing trace with hash -408439034, now seen corresponding path program 1 times [2023-11-10 11:57:42,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:42,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499606613] [2023-11-10 11:57:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:42,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:42,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499606613] [2023-11-10 11:57:42,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499606613] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:42,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155616471] [2023-11-10 11:57:42,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:42,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:42,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:42,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:57:42,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-10 11:57:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:43,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:57:43,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:43,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:43,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:43,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:43,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155616471] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:43,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:43,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:57:43,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020183358] [2023-11-10 11:57:43,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:43,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:57:43,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:43,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:57:43,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:57:43,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 178 [2023-11-10 11:57:43,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 131 transitions, 290 flow. Second operand has 10 states, 10 states have (on average 140.4) internal successors, (1404), 10 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:43,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 178 [2023-11-10 11:57:43,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:43,180 INFO L124 PetriNetUnfolderBase]: 1/152 cut-off events. [2023-11-10 11:57:43,180 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-10 11:57:43,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 152 events. 1/152 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 205 event pairs, 0 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 133. Up to 7 conditions per place. [2023-11-10 11:57:43,181 INFO L140 encePairwiseOnDemand]: 172/178 looper letters, 14 selfloop transitions, 9 changer transitions 0/141 dead transitions. [2023-11-10 11:57:43,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 141 transitions, 358 flow [2023-11-10 11:57:43,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:57:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:57:43,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1267 transitions. [2023-11-10 11:57:43,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7908863920099876 [2023-11-10 11:57:43,183 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1267 transitions. [2023-11-10 11:57:43,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1267 transitions. [2023-11-10 11:57:43,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:43,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1267 transitions. [2023-11-10 11:57:43,186 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,189 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 178.0) internal successors, (1780), 10 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,189 INFO L175 Difference]: Start difference. First operand has 160 places, 131 transitions, 290 flow. Second operand 9 states and 1267 transitions. [2023-11-10 11:57:43,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 141 transitions, 358 flow [2023-11-10 11:57:43,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 141 transitions, 354 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:43,192 INFO L231 Difference]: Finished difference. Result has 149 places, 137 transitions, 336 flow [2023-11-10 11:57:43,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=178, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=336, PETRI_PLACES=149, PETRI_TRANSITIONS=137} [2023-11-10 11:57:43,194 INFO L281 CegarLoopForPetriNet]: 158 programPoint places, -9 predicate places. [2023-11-10 11:57:43,194 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 137 transitions, 336 flow [2023-11-10 11:57:43,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 140.4) internal successors, (1404), 10 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:43,195 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:57:43,222 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-10 11:57:43,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-10 11:57:43,400 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:43,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:43,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1525964698, now seen corresponding path program 1 times [2023-11-10 11:57:43,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:43,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255011791] [2023-11-10 11:57:43,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:43,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:43,414 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:57:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:43,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:57:43,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:57:43,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:57:43,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:57:43,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-10 11:57:43,428 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:57:43,428 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:57:43,428 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-10 11:57:43,447 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-10 11:57:43,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 183 places, 208 transitions, 456 flow [2023-11-10 11:57:43,534 INFO L124 PetriNetUnfolderBase]: 82/580 cut-off events. [2023-11-10 11:57:43,534 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-10 11:57:43,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 631 conditions, 580 events. 82/580 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2168 event pairs, 6 based on Foata normal form. 0/493 useless extension candidates. Maximal degree in co-relation 399. Up to 32 conditions per place. [2023-11-10 11:57:43,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 183 places, 208 transitions, 456 flow [2023-11-10 11:57:43,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 183 places, 208 transitions, 456 flow [2023-11-10 11:57:43,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:57:43,541 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;@707542e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:57:43,541 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:57:43,546 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:57:43,546 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-10 11:57:43,546 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:43,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:43,546 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 11:57:43,546 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:43,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -68626024, now seen corresponding path program 1 times [2023-11-10 11:57:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:43,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987222438] [2023-11-10 11:57:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:43,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:43,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:43,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:43,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:43,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987222438] [2023-11-10 11:57:43,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987222438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:43,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:43,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:57:43,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936642093] [2023-11-10 11:57:43,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:43,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:57:43,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:43,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:57:43,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:57:43,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 208 [2023-11-10 11:57:43,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 208 transitions, 456 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:43,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 208 [2023-11-10 11:57:43,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:43,645 INFO L124 PetriNetUnfolderBase]: 21/497 cut-off events. [2023-11-10 11:57:43,645 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-10 11:57:43,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 497 events. 21/497 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1906 event pairs, 6 based on Foata normal form. 664/1136 useless extension candidates. Maximal degree in co-relation 380. Up to 76 conditions per place. [2023-11-10 11:57:43,648 INFO L140 encePairwiseOnDemand]: 176/208 looper letters, 14 selfloop transitions, 2 changer transitions 25/182 dead transitions. [2023-11-10 11:57:43,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 182 transitions, 446 flow [2023-11-10 11:57:43,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:43,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:43,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 541 transitions. [2023-11-10 11:57:43,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8669871794871795 [2023-11-10 11:57:43,649 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 541 transitions. [2023-11-10 11:57:43,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 541 transitions. [2023-11-10 11:57:43,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:43,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 541 transitions. [2023-11-10 11:57:43,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,651 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 208.0) internal successors, (832), 4 states have internal predecessors, (832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,651 INFO L175 Difference]: Start difference. First operand has 183 places, 208 transitions, 456 flow. Second operand 3 states and 541 transitions. [2023-11-10 11:57:43,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 182 transitions, 446 flow [2023-11-10 11:57:43,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 182 transitions, 446 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:43,654 INFO L231 Difference]: Finished difference. Result has 185 places, 154 transitions, 346 flow [2023-11-10 11:57:43,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=396, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=185, PETRI_TRANSITIONS=154} [2023-11-10 11:57:43,655 INFO L281 CegarLoopForPetriNet]: 183 programPoint places, 2 predicate places. [2023-11-10 11:57:43,655 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 154 transitions, 346 flow [2023-11-10 11:57:43,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:43,655 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] [2023-11-10 11:57:43,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-10 11:57:43,655 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:43,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:43,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1247170034, now seen corresponding path program 1 times [2023-11-10 11:57:43,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:43,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000471843] [2023-11-10 11:57:43,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:43,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:43,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:43,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000471843] [2023-11-10 11:57:43,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000471843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:43,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962258488] [2023-11-10 11:57:43,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:43,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:43,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:43,703 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:57:43,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-10 11:57:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:43,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:57:43,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:43,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:43,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962258488] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:43,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:43,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:57:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020013542] [2023-11-10 11:57:43,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:43,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:57:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:43,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:57:43,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:57:43,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 208 [2023-11-10 11:57:43,852 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 154 transitions, 346 flow. Second operand has 10 states, 10 states have (on average 162.4) internal successors, (1624), 10 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:43,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 208 [2023-11-10 11:57:43,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:43,918 INFO L124 PetriNetUnfolderBase]: 1/195 cut-off events. [2023-11-10 11:57:43,918 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:57:43,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 195 events. 1/195 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 348 event pairs, 0 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 190. Up to 11 conditions per place. [2023-11-10 11:57:43,919 INFO L140 encePairwiseOnDemand]: 202/208 looper letters, 15 selfloop transitions, 9 changer transitions 0/164 dead transitions. [2023-11-10 11:57:43,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 164 transitions, 416 flow [2023-11-10 11:57:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:57:43,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:57:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1466 transitions. [2023-11-10 11:57:43,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7831196581196581 [2023-11-10 11:57:43,922 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1466 transitions. [2023-11-10 11:57:43,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1466 transitions. [2023-11-10 11:57:43,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:43,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1466 transitions. [2023-11-10 11:57:43,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 162.88888888888889) internal successors, (1466), 9 states have internal predecessors, (1466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 208.0) internal successors, (2080), 10 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,927 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 208.0) internal successors, (2080), 10 states have internal predecessors, (2080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,927 INFO L175 Difference]: Start difference. First operand has 185 places, 154 transitions, 346 flow. Second operand 9 states and 1466 transitions. [2023-11-10 11:57:43,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 164 transitions, 416 flow [2023-11-10 11:57:43,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 164 transitions, 408 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:43,930 INFO L231 Difference]: Finished difference. Result has 174 places, 160 transitions, 388 flow [2023-11-10 11:57:43,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=338, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=388, PETRI_PLACES=174, PETRI_TRANSITIONS=160} [2023-11-10 11:57:43,930 INFO L281 CegarLoopForPetriNet]: 183 programPoint places, -9 predicate places. [2023-11-10 11:57:43,930 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 160 transitions, 388 flow [2023-11-10 11:57:43,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 162.4) internal successors, (1624), 10 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:43,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:43,931 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:57:43,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-10 11:57:44,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:44,137 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:44,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:44,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1686099479, now seen corresponding path program 1 times [2023-11-10 11:57:44,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:44,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800229835] [2023-11-10 11:57:44,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:44,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:44,225 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-10 11:57:44,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:44,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800229835] [2023-11-10 11:57:44,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800229835] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:44,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:44,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-10 11:57:44,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299873575] [2023-11-10 11:57:44,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:44,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-10 11:57:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:44,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-10 11:57:44,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-10 11:57:44,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 208 [2023-11-10 11:57:44,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 160 transitions, 388 flow. Second operand has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:44,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:44,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 208 [2023-11-10 11:57:44,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:49,333 INFO L124 PetriNetUnfolderBase]: 16743/41407 cut-off events. [2023-11-10 11:57:49,333 INFO L125 PetriNetUnfolderBase]: For 645/645 co-relation queries the response was YES. [2023-11-10 11:57:49,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64808 conditions, 41407 events. 16743/41407 cut-off events. For 645/645 co-relation queries the response was YES. Maximal size of possible extension queue 1767. Compared 492976 event pairs, 10951 based on Foata normal form. 750/41595 useless extension candidates. Maximal degree in co-relation 41353. Up to 14189 conditions per place. [2023-11-10 11:57:49,595 INFO L140 encePairwiseOnDemand]: 200/208 looper letters, 31 selfloop transitions, 5 changer transitions 53/224 dead transitions. [2023-11-10 11:57:49,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 224 transitions, 709 flow [2023-11-10 11:57:49,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-10 11:57:49,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-10 11:57:49,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1113 transitions. [2023-11-10 11:57:49,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7644230769230769 [2023-11-10 11:57:49,598 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1113 transitions. [2023-11-10 11:57:49,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1113 transitions. [2023-11-10 11:57:49,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:49,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1113 transitions. [2023-11-10 11:57:49,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 159.0) internal successors, (1113), 7 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:49,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 208.0) internal successors, (1664), 8 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:49,604 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 208.0) internal successors, (1664), 8 states have internal predecessors, (1664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:49,604 INFO L175 Difference]: Start difference. First operand has 174 places, 160 transitions, 388 flow. Second operand 7 states and 1113 transitions. [2023-11-10 11:57:49,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 224 transitions, 709 flow [2023-11-10 11:57:49,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 224 transitions, 703 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:49,610 INFO L231 Difference]: Finished difference. Result has 184 places, 164 transitions, 439 flow [2023-11-10 11:57:49,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=208, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=184, PETRI_TRANSITIONS=164} [2023-11-10 11:57:49,611 INFO L281 CegarLoopForPetriNet]: 183 programPoint places, 1 predicate places. [2023-11-10 11:57:49,611 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 164 transitions, 439 flow [2023-11-10 11:57:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 147.6) internal successors, (738), 5 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:49,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:49,611 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:57:49,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-10 11:57:49,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:49,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:49,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1175666307, now seen corresponding path program 1 times [2023-11-10 11:57:49,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:49,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787029468] [2023-11-10 11:57:49,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:49,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:49,630 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:57:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:57:49,657 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:57:49,657 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:57:49,657 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:57:49,658 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:57:49,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-10 11:57:49,658 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:57:49,658 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:57:49,658 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-10 11:57:49,687 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-10 11:57:49,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 238 transitions, 531 flow [2023-11-10 11:57:49,868 INFO L124 PetriNetUnfolderBase]: 141/929 cut-off events. [2023-11-10 11:57:49,868 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-10 11:57:49,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1035 conditions, 929 events. 141/929 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4209 event pairs, 23 based on Foata normal form. 0/798 useless extension candidates. Maximal degree in co-relation 625. Up to 80 conditions per place. [2023-11-10 11:57:49,874 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 238 transitions, 531 flow [2023-11-10 11:57:49,877 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 238 transitions, 531 flow [2023-11-10 11:57:49,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:57:49,879 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;@707542e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:57:49,879 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:57:49,882 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:57:49,882 INFO L124 PetriNetUnfolderBase]: 6/89 cut-off events. [2023-11-10 11:57:49,882 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:57:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:49,882 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 11:57:49,882 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:49,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:49,883 INFO L85 PathProgramCache]: Analyzing trace with hash -545255290, now seen corresponding path program 1 times [2023-11-10 11:57:49,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776569034] [2023-11-10 11:57:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:49,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:49,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776569034] [2023-11-10 11:57:49,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776569034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:49,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:49,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:57:49,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409234979] [2023-11-10 11:57:49,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:49,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:57:49,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:49,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:57:49,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:57:49,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 238 [2023-11-10 11:57:49,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 238 transitions, 531 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:49,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:49,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 238 [2023-11-10 11:57:49,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:50,025 INFO L124 PetriNetUnfolderBase]: 54/819 cut-off events. [2023-11-10 11:57:50,025 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-11-10 11:57:50,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1077 conditions, 819 events. 54/819 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3844 event pairs, 23 based on Foata normal form. 1421/2197 useless extension candidates. Maximal degree in co-relation 622. Up to 147 conditions per place. [2023-11-10 11:57:50,032 INFO L140 encePairwiseOnDemand]: 200/238 looper letters, 15 selfloop transitions, 2 changer transitions 26/206 dead transitions. [2023-11-10 11:57:50,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 206 transitions, 513 flow [2023-11-10 11:57:50,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:57:50,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:57:50,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-11-10 11:57:50,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8613445378151261 [2023-11-10 11:57:50,034 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-11-10 11:57:50,034 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-11-10 11:57:50,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:50,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-11-10 11:57:50,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,036 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,037 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 238.0) internal successors, (952), 4 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,037 INFO L175 Difference]: Start difference. First operand has 208 places, 238 transitions, 531 flow. Second operand 3 states and 615 transitions. [2023-11-10 11:57:50,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 206 transitions, 513 flow [2023-11-10 11:57:50,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 206 transitions, 513 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:57:50,040 INFO L231 Difference]: Finished difference. Result has 210 places, 177 transitions, 404 flow [2023-11-10 11:57:50,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=459, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=210, PETRI_TRANSITIONS=177} [2023-11-10 11:57:50,041 INFO L281 CegarLoopForPetriNet]: 208 programPoint places, 2 predicate places. [2023-11-10 11:57:50,041 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 177 transitions, 404 flow [2023-11-10 11:57:50,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:50,042 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] [2023-11-10 11:57:50,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-10 11:57:50,042 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:50,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:50,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1291276228, now seen corresponding path program 1 times [2023-11-10 11:57:50,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:50,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814161975] [2023-11-10 11:57:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:50,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:50,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814161975] [2023-11-10 11:57:50,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814161975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:57:50,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187007168] [2023-11-10 11:57:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:50,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:50,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:57:50,109 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:57:50,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-10 11:57:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:50,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:57:50,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:57:50,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:50,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:57:50,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:57:50,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187007168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:57:50,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:57:50,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:57:50,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133368704] [2023-11-10 11:57:50,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:57:50,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:57:50,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:50,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:57:50,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:57:50,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 238 [2023-11-10 11:57:50,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 177 transitions, 404 flow. Second operand has 10 states, 10 states have (on average 184.4) internal successors, (1844), 10 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:50,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 238 [2023-11-10 11:57:50,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:57:50,308 INFO L124 PetriNetUnfolderBase]: 1/238 cut-off events. [2023-11-10 11:57:50,308 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-10 11:57:50,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 317 conditions, 238 events. 1/238 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 491 event pairs, 0 based on Foata normal form. 2/239 useless extension candidates. Maximal degree in co-relation 248. Up to 15 conditions per place. [2023-11-10 11:57:50,309 INFO L140 encePairwiseOnDemand]: 232/238 looper letters, 16 selfloop transitions, 9 changer transitions 0/187 dead transitions. [2023-11-10 11:57:50,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 187 transitions, 476 flow [2023-11-10 11:57:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:57:50,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:57:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1665 transitions. [2023-11-10 11:57:50,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7773109243697479 [2023-11-10 11:57:50,312 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1665 transitions. [2023-11-10 11:57:50,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1665 transitions. [2023-11-10 11:57:50,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:57:50,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1665 transitions. [2023-11-10 11:57:50,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 185.0) internal successors, (1665), 9 states have internal predecessors, (1665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,317 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,318 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 238.0) internal successors, (2380), 10 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,318 INFO L175 Difference]: Start difference. First operand has 210 places, 177 transitions, 404 flow. Second operand 9 states and 1665 transitions. [2023-11-10 11:57:50,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 187 transitions, 476 flow [2023-11-10 11:57:50,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 187 transitions, 462 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:57:50,321 INFO L231 Difference]: Finished difference. Result has 199 places, 183 transitions, 440 flow [2023-11-10 11:57:50,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=440, PETRI_PLACES=199, PETRI_TRANSITIONS=183} [2023-11-10 11:57:50,322 INFO L281 CegarLoopForPetriNet]: 208 programPoint places, -9 predicate places. [2023-11-10 11:57:50,322 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 183 transitions, 440 flow [2023-11-10 11:57:50,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 184.4) internal successors, (1844), 10 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:57:50,323 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:57:50,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-10 11:57:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:57:50,529 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:57:50,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:57:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 831789547, now seen corresponding path program 1 times [2023-11-10 11:57:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:57:50,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931860631] [2023-11-10 11:57:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:57:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:57:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:57:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-10 11:57:50,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:57:50,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931860631] [2023-11-10 11:57:50,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931860631] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:57:50,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:57:50,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-10 11:57:50,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969563747] [2023-11-10 11:57:50,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:57:50,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-10 11:57:50,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:57:50,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-10 11:57:50,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-10 11:57:50,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 238 [2023-11-10 11:57:50,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 183 transitions, 440 flow. Second operand has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:57:50,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:57:50,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 238 [2023-11-10 11:57:50,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:19,386 INFO L124 PetriNetUnfolderBase]: 110510/244945 cut-off events. [2023-11-10 11:58:19,386 INFO L125 PetriNetUnfolderBase]: For 2864/2864 co-relation queries the response was YES. [2023-11-10 11:58:21,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389171 conditions, 244945 events. 110510/244945 cut-off events. For 2864/2864 co-relation queries the response was YES. Maximal size of possible extension queue 8950. Compared 3343025 event pairs, 76730 based on Foata normal form. 3875/246558 useless extension candidates. Maximal degree in co-relation 247618. Up to 88950 conditions per place. [2023-11-10 11:58:22,046 INFO L140 encePairwiseOnDemand]: 229/238 looper letters, 38 selfloop transitions, 6 changer transitions 65/262 dead transitions. [2023-11-10 11:58:22,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 262 transitions, 836 flow [2023-11-10 11:58:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-10 11:58:22,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-10 11:58:22,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1259 transitions. [2023-11-10 11:58:22,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7557022809123649 [2023-11-10 11:58:22,049 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1259 transitions. [2023-11-10 11:58:22,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1259 transitions. [2023-11-10 11:58:22,049 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:22,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1259 transitions. [2023-11-10 11:58:22,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 179.85714285714286) internal successors, (1259), 7 states have internal predecessors, (1259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,053 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 238.0) internal successors, (1904), 8 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,053 INFO L175 Difference]: Start difference. First operand has 199 places, 183 transitions, 440 flow. Second operand 7 states and 1259 transitions. [2023-11-10 11:58:22,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 262 transitions, 836 flow [2023-11-10 11:58:22,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 262 transitions, 830 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:22,062 INFO L231 Difference]: Finished difference. Result has 209 places, 188 transitions, 502 flow [2023-11-10 11:58:22,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=238, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=502, PETRI_PLACES=209, PETRI_TRANSITIONS=188} [2023-11-10 11:58:22,062 INFO L281 CegarLoopForPetriNet]: 208 programPoint places, 1 predicate places. [2023-11-10 11:58:22,063 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 188 transitions, 502 flow [2023-11-10 11:58:22,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 165.6) internal successors, (828), 5 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:22,063 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:22,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-10 11:58:22,063 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:22,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:22,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1238446636, now seen corresponding path program 1 times [2023-11-10 11:58:22,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:22,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757692861] [2023-11-10 11:58:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:22,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:22,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:22,409 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-10 11:58:22,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757692861] [2023-11-10 11:58:22,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757692861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:22,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963425273] [2023-11-10 11:58:22,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:22,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:22,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:22,411 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:22,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-10 11:58:22,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:22,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:22,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:22,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:22,713 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:22,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963425273] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:22,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:22,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-11-10 11:58:22,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594368448] [2023-11-10 11:58:22,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:22,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-10 11:58:22,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:22,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-10 11:58:22,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-11-10 11:58:22,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 238 [2023-11-10 11:58:22,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 188 transitions, 502 flow. Second operand has 21 states, 21 states have (on average 138.33333333333334) internal successors, (2905), 21 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:22,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 238 [2023-11-10 11:58:22,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand