/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_37-indirect_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 11:58:11,751 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 11:58:11,813 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-11-10 11:58:11,826 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 11:58:11,826 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 11:58:11,826 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 11:58:11,827 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 11:58:11,827 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 11:58:11,827 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 11:58:11,828 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 11:58:11,828 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 11:58:11,828 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 11:58:11,828 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 11:58:11,829 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 11:58:11,829 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 11:58:11,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 11:58:11,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 11:58:11,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 11:58:11,830 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 11:58:11,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 11:58:11,830 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 11:58:11,831 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 11:58:11,831 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 11:58:11,831 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 11:58:11,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 11:58:11,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:58:11,832 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 11:58:11,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 11:58:11,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 11:58:11,832 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 11:58:11,833 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 11:58:11,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 11:58:11,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 11:58:11,833 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 11:58:12,033 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 11:58:12,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 11:58:12,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 11:58:12,058 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 11:58:12,062 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 11:58:12,064 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-10 11:58:13,343 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 11:58:13,524 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 11:58:13,524 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_37-indirect_racing.i [2023-11-10 11:58:13,536 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec7f9b64/247a5b7aaeab416ab237b0d5e75675b9/FLAG2bde9f2cd [2023-11-10 11:58:13,556 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cec7f9b64/247a5b7aaeab416ab237b0d5e75675b9 [2023-11-10 11:58:13,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 11:58:13,559 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 11:58:13,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 11:58:13,560 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 11:58:13,563 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 11:58:13,564 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,564 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52048c1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13, skipping insertion in model container [2023-11-10 11:58:13,565 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 11:58:13,793 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_37-indirect_racing.i[30176,30189] [2023-11-10 11:58:13,806 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:58:13,814 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 11:58:13,834 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_37-indirect_racing.i[30176,30189] [2023-11-10 11:58:13,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:58:13,872 INFO L206 MainTranslator]: Completed translation [2023-11-10 11:58:13,872 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13 WrapperNode [2023-11-10 11:58:13,872 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 11:58:13,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 11:58:13,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 11:58:13,875 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 11:58:13,880 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,900 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,923 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 78 [2023-11-10 11:58:13,923 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 11:58:13,924 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 11:58:13,924 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 11:58:13,924 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 11:58:13,930 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,935 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,936 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,942 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,945 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,946 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,947 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 11:58:13,949 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 11:58:13,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 11:58:13,949 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 11:58:13,950 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (1/1) ... [2023-11-10 11:58:13,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:58:13,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:13,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-10 11:58:13,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-10 11:58:14,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-10 11:58:14,002 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 11:58:14,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 11:58:14,003 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 11:58:14,004 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-10 11:58:14,102 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 11:58:14,103 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 11:58:14,244 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 11:58:14,250 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 11:58:14,251 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-10 11:58:14,253 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:58:14 BoogieIcfgContainer [2023-11-10 11:58:14,253 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 11:58:14,254 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 11:58:14,254 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 11:58:14,257 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 11:58:14,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 11:58:13" (1/3) ... [2023-11-10 11:58:14,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232e9aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:58:14, skipping insertion in model container [2023-11-10 11:58:14,257 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:58:13" (2/3) ... [2023-11-10 11:58:14,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@232e9aae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:58:14, skipping insertion in model container [2023-11-10 11:58:14,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:58:14" (3/3) ... [2023-11-10 11:58:14,258 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2023-11-10 11:58:14,271 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 11:58:14,271 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-10 11:58:14,271 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 11:58:14,321 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-10 11:58:14,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 103 places, 112 transitions, 231 flow [2023-11-10 11:58:14,382 INFO L124 PetriNetUnfolderBase]: 17/149 cut-off events. [2023-11-10 11:58:14,382 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 11:58:14,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 149 events. 17/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 369 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 74. Up to 4 conditions per place. [2023-11-10 11:58:14,388 INFO L82 GeneralOperation]: Start removeDead. Operand has 103 places, 112 transitions, 231 flow [2023-11-10 11:58:14,391 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 107 transitions, 218 flow [2023-11-10 11:58:14,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:14,413 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:14,415 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:14,443 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:14,443 INFO L124 PetriNetUnfolderBase]: 3/72 cut-off events. [2023-11-10 11:58:14,443 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:14,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:14,444 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] [2023-11-10 11:58:14,445 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:14,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:14,449 INFO L85 PathProgramCache]: Analyzing trace with hash -418703027, now seen corresponding path program 1 times [2023-11-10 11:58:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:14,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105324126] [2023-11-10 11:58:14,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:14,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:14,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:14,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105324126] [2023-11-10 11:58:14,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105324126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:14,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:14,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:14,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689895348] [2023-11-10 11:58:14,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:14,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:14,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:14,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:14,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 112 [2023-11-10 11:58:14,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:14,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:14,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 112 [2023-11-10 11:58:14,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:14,845 INFO L124 PetriNetUnfolderBase]: 0/99 cut-off events. [2023-11-10 11:58:14,845 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:14,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 99 events. 0/99 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 83 event pairs, 0 based on Foata normal form. 31/127 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-11-10 11:58:14,846 INFO L140 encePairwiseOnDemand]: 98/112 looper letters, 9 selfloop transitions, 2 changer transitions 17/97 dead transitions. [2023-11-10 11:58:14,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 97 transitions, 222 flow [2023-11-10 11:58:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:14,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 298 transitions. [2023-11-10 11:58:14,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8869047619047619 [2023-11-10 11:58:14,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 298 transitions. [2023-11-10 11:58:14,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 298 transitions. [2023-11-10 11:58:14,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:14,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 298 transitions. [2023-11-10 11:58:14,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.33333333333333) internal successors, (298), 3 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:14,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:14,874 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 112.0) internal successors, (448), 4 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:14,875 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 218 flow. Second operand 3 states and 298 transitions. [2023-11-10 11:58:14,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 97 transitions, 222 flow [2023-11-10 11:58:14,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 97 transitions, 222 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:14,881 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 168 flow [2023-11-10 11:58:14,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2023-11-10 11:58:14,885 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2023-11-10 11:58:14,886 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 168 flow [2023-11-10 11:58:14,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.33333333333333) internal successors, (271), 3 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:14,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:14,886 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] [2023-11-10 11:58:14,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 11:58:14,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:14,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:14,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1722315766, now seen corresponding path program 1 times [2023-11-10 11:58:14,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:14,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114314765] [2023-11-10 11:58:14,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:14,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:14,918 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:14,965 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:14,966 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:14,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:14,968 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:14,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-10 11:58:14,969 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-10 11:58:14,971 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:14,971 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-10 11:58:14,997 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 11:58:14,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 146 transitions, 308 flow [2023-11-10 11:58:15,030 INFO L124 PetriNetUnfolderBase]: 31/246 cut-off events. [2023-11-10 11:58:15,030 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-10 11:58:15,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 246 events. 31/246 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 758 event pairs, 0 based on Foata normal form. 0/208 useless extension candidates. Maximal degree in co-relation 151. Up to 8 conditions per place. [2023-11-10 11:58:15,032 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 146 transitions, 308 flow [2023-11-10 11:58:15,034 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 132 places, 146 transitions, 308 flow [2023-11-10 11:58:15,035 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:15,036 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:15,036 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:15,042 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:15,042 INFO L124 PetriNetUnfolderBase]: 3/72 cut-off events. [2023-11-10 11:58:15,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:15,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:15,042 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] [2023-11-10 11:58:15,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:15,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:15,043 INFO L85 PathProgramCache]: Analyzing trace with hash -2105529121, now seen corresponding path program 1 times [2023-11-10 11:58:15,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:15,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092558911] [2023-11-10 11:58:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:15,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:15,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:15,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:15,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092558911] [2023-11-10 11:58:15,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092558911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:15,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:15,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:15,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316761665] [2023-11-10 11:58:15,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:15,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:15,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:15,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:15,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:15,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 146 [2023-11-10 11:58:15,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 146 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:15,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 146 [2023-11-10 11:58:15,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:15,166 INFO L124 PetriNetUnfolderBase]: 2/198 cut-off events. [2023-11-10 11:58:15,166 INFO L125 PetriNetUnfolderBase]: For 27/60 co-relation queries the response was YES. [2023-11-10 11:58:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 198 events. 2/198 cut-off events. For 27/60 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 444 event pairs, 0 based on Foata normal form. 107/297 useless extension candidates. Maximal degree in co-relation 125. Up to 22 conditions per place. [2023-11-10 11:58:15,168 INFO L140 encePairwiseOnDemand]: 126/146 looper letters, 12 selfloop transitions, 2 changer transitions 23/132 dead transitions. [2023-11-10 11:58:15,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 132 transitions, 314 flow [2023-11-10 11:58:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:15,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-11-10 11:58:15,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8835616438356164 [2023-11-10 11:58:15,172 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-11-10 11:58:15,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-11-10 11:58:15,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:15,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-11-10 11:58:15,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,180 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,180 INFO L175 Difference]: Start difference. First operand has 132 places, 146 transitions, 308 flow. Second operand 3 states and 387 transitions. [2023-11-10 11:58:15,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 132 transitions, 314 flow [2023-11-10 11:58:15,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 132 transitions, 314 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:15,182 INFO L231 Difference]: Finished difference. Result has 134 places, 106 transitions, 232 flow [2023-11-10 11:58:15,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=134, PETRI_TRANSITIONS=106} [2023-11-10 11:58:15,183 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, 2 predicate places. [2023-11-10 11:58:15,183 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 106 transitions, 232 flow [2023-11-10 11:58:15,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:15,184 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] [2023-11-10 11:58:15,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-10 11:58:15,184 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:15,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:15,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1183061553, now seen corresponding path program 1 times [2023-11-10 11:58:15,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:15,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802012925] [2023-11-10 11:58:15,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:15,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:15,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:15,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802012925] [2023-11-10 11:58:15,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802012925] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:15,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794413149] [2023-11-10 11:58:15,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:15,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:15,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:15,431 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:15,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-10 11:58:15,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:15,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:15,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:15,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794413149] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:15,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377789773] [2023-11-10 11:58:15,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:15,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:15,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:15,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:15,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 146 [2023-11-10 11:58:15,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 106 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 116.4) internal successors, (1164), 10 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:15,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 146 [2023-11-10 11:58:15,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:15,631 INFO L124 PetriNetUnfolderBase]: 0/108 cut-off events. [2023-11-10 11:58:15,631 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-10 11:58:15,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 108 events. 0/108 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 2/110 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-11-10 11:58:15,632 INFO L140 encePairwiseOnDemand]: 141/146 looper letters, 9 selfloop transitions, 7 changer transitions 0/102 dead transitions. [2023-11-10 11:58:15,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 254 flow [2023-11-10 11:58:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:15,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:15,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1044 transitions. [2023-11-10 11:58:15,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7945205479452054 [2023-11-10 11:58:15,634 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1044 transitions. [2023-11-10 11:58:15,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1044 transitions. [2023-11-10 11:58:15,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:15,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1044 transitions. [2023-11-10 11:58:15,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 116.0) internal successors, (1044), 9 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 146.0) internal successors, (1460), 10 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,640 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 146.0) internal successors, (1460), 10 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,640 INFO L175 Difference]: Start difference. First operand has 134 places, 106 transitions, 232 flow. Second operand 9 states and 1044 transitions. [2023-11-10 11:58:15,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 254 flow [2023-11-10 11:58:15,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 102 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:15,642 INFO L231 Difference]: Finished difference. Result has 110 places, 98 transitions, 226 flow [2023-11-10 11:58:15,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=110, PETRI_TRANSITIONS=98} [2023-11-10 11:58:15,643 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -22 predicate places. [2023-11-10 11:58:15,643 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 98 transitions, 226 flow [2023-11-10 11:58:15,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 116.4) internal successors, (1164), 10 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:15,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:15,644 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] [2023-11-10 11:58:15,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:15,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:15,852 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:15,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:15,853 INFO L85 PathProgramCache]: Analyzing trace with hash -729300005, now seen corresponding path program 1 times [2023-11-10 11:58:15,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:15,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298394313] [2023-11-10 11:58:15,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:15,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:15,876 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:15,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:15,898 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:15,898 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:15,898 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:15,898 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:15,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-10 11:58:15,899 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:58:15,899 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:15,899 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-10 11:58:15,929 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-10 11:58:15,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 180 transitions, 387 flow [2023-11-10 11:58:15,973 INFO L124 PetriNetUnfolderBase]: 50/378 cut-off events. [2023-11-10 11:58:15,973 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:58:15,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403 conditions, 378 events. 50/378 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1298 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 254. Up to 16 conditions per place. [2023-11-10 11:58:15,978 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 180 transitions, 387 flow [2023-11-10 11:58:15,981 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 180 transitions, 387 flow [2023-11-10 11:58:15,983 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:15,987 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:15,988 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:15,991 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:15,991 INFO L124 PetriNetUnfolderBase]: 3/72 cut-off events. [2023-11-10 11:58:15,991 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:15,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:15,992 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] [2023-11-10 11:58:15,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:15,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:15,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1361089645, now seen corresponding path program 1 times [2023-11-10 11:58:15,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:15,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425958291] [2023-11-10 11:58:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:15,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:16,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425958291] [2023-11-10 11:58:16,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425958291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:16,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:16,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:16,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175338913] [2023-11-10 11:58:16,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:16,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:16,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:16,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:16,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:16,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 180 [2023-11-10 11:58:16,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 180 transitions, 387 flow. Second operand has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:16,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 180 [2023-11-10 11:58:16,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:16,091 INFO L124 PetriNetUnfolderBase]: 7/315 cut-off events. [2023-11-10 11:58:16,091 INFO L125 PetriNetUnfolderBase]: For 43/83 co-relation queries the response was YES. [2023-11-10 11:58:16,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 386 conditions, 315 events. 7/315 cut-off events. For 43/83 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 956 event pairs, 1 based on Foata normal form. 284/585 useless extension candidates. Maximal degree in co-relation 232. Up to 41 conditions per place. [2023-11-10 11:58:16,093 INFO L140 encePairwiseOnDemand]: 154/180 looper letters, 13 selfloop transitions, 2 changer transitions 24/160 dead transitions. [2023-11-10 11:58:16,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 160 transitions, 385 flow [2023-11-10 11:58:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:16,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:16,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2023-11-10 11:58:16,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8759259259259259 [2023-11-10 11:58:16,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2023-11-10 11:58:16,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2023-11-10 11:58:16,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:16,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2023-11-10 11:58:16,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,097 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 180.0) internal successors, (720), 4 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,097 INFO L175 Difference]: Start difference. First operand has 161 places, 180 transitions, 387 flow. Second operand 3 states and 473 transitions. [2023-11-10 11:58:16,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 160 transitions, 385 flow [2023-11-10 11:58:16,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 160 transitions, 385 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:16,100 INFO L231 Difference]: Finished difference. Result has 163 places, 133 transitions, 294 flow [2023-11-10 11:58:16,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=339, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=163, PETRI_TRANSITIONS=133} [2023-11-10 11:58:16,100 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, 2 predicate places. [2023-11-10 11:58:16,100 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 133 transitions, 294 flow [2023-11-10 11:58:16,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.33333333333334) internal successors, (427), 3 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:16,101 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] [2023-11-10 11:58:16,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-10 11:58:16,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:16,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:16,101 INFO L85 PathProgramCache]: Analyzing trace with hash -20233245, now seen corresponding path program 1 times [2023-11-10 11:58:16,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:16,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737752703] [2023-11-10 11:58:16,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:16,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:16,143 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:16,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737752703] [2023-11-10 11:58:16,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737752703] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:16,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924116019] [2023-11-10 11:58:16,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:16,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:16,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:16,145 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:16,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-10 11:58:16,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:16,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:16,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924116019] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:16,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:16,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:16,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009506474] [2023-11-10 11:58:16,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:16,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:16,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:16,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:16,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:16,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 180 [2023-11-10 11:58:16,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 133 transitions, 294 flow. Second operand has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:16,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 180 [2023-11-10 11:58:16,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:16,324 INFO L124 PetriNetUnfolderBase]: 0/154 cut-off events. [2023-11-10 11:58:16,324 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-10 11:58:16,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 154 events. 0/154 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 239 event pairs, 0 based on Foata normal form. 2/156 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:58:16,324 INFO L140 encePairwiseOnDemand]: 174/180 looper letters, 14 selfloop transitions, 9 changer transitions 0/143 dead transitions. [2023-11-10 11:58:16,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 143 transitions, 362 flow [2023-11-10 11:58:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:16,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1285 transitions. [2023-11-10 11:58:16,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7932098765432098 [2023-11-10 11:58:16,327 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1285 transitions. [2023-11-10 11:58:16,327 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1285 transitions. [2023-11-10 11:58:16,327 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:16,327 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1285 transitions. [2023-11-10 11:58:16,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 142.77777777777777) internal successors, (1285), 9 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 180.0) internal successors, (1800), 10 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,331 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 180.0) internal successors, (1800), 10 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,331 INFO L175 Difference]: Start difference. First operand has 163 places, 133 transitions, 294 flow. Second operand 9 states and 1285 transitions. [2023-11-10 11:58:16,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 143 transitions, 362 flow [2023-11-10 11:58:16,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 143 transitions, 358 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:16,334 INFO L231 Difference]: Finished difference. Result has 152 places, 139 transitions, 340 flow [2023-11-10 11:58:16,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=180, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=340, PETRI_PLACES=152, PETRI_TRANSITIONS=139} [2023-11-10 11:58:16,334 INFO L281 CegarLoopForPetriNet]: 161 programPoint places, -9 predicate places. [2023-11-10 11:58:16,334 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 139 transitions, 340 flow [2023-11-10 11:58:16,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 142.4) internal successors, (1424), 10 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:16,335 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] [2023-11-10 11:58:16,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:16,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-10 11:58:16,540 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:16,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:16,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1800329171, now seen corresponding path program 1 times [2023-11-10 11:58:16,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:16,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327121370] [2023-11-10 11:58:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:16,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:16,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:16,561 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:16,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:16,573 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:16,573 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:16,573 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:16,573 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:16,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-10 11:58:16,573 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:58:16,574 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:16,574 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-10 11:58:16,590 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-10 11:58:16,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 190 places, 214 transitions, 468 flow [2023-11-10 11:58:16,668 INFO L124 PetriNetUnfolderBase]: 81/582 cut-off events. [2023-11-10 11:58:16,668 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-10 11:58:16,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 633 conditions, 582 events. 81/582 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2320 event pairs, 6 based on Foata normal form. 0/496 useless extension candidates. Maximal degree in co-relation 398. Up to 32 conditions per place. [2023-11-10 11:58:16,672 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 214 transitions, 468 flow [2023-11-10 11:58:16,675 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 190 places, 214 transitions, 468 flow [2023-11-10 11:58:16,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:16,676 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:16,676 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:16,684 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:16,684 INFO L124 PetriNetUnfolderBase]: 3/72 cut-off events. [2023-11-10 11:58:16,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:16,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:16,684 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] [2023-11-10 11:58:16,684 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:16,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:16,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1814615401, now seen corresponding path program 1 times [2023-11-10 11:58:16,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:16,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038786404] [2023-11-10 11:58:16,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:16,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:16,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:16,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:16,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038786404] [2023-11-10 11:58:16,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038786404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:16,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:16,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:16,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213120657] [2023-11-10 11:58:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:16,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:16,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 214 [2023-11-10 11:58:16,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 214 transitions, 468 flow. Second operand has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:16,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 214 [2023-11-10 11:58:16,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:16,808 INFO L124 PetriNetUnfolderBase]: 20/500 cut-off events. [2023-11-10 11:58:16,809 INFO L125 PetriNetUnfolderBase]: For 167/312 co-relation queries the response was YES. [2023-11-10 11:58:16,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632 conditions, 500 events. 20/500 cut-off events. For 167/312 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2001 event pairs, 6 based on Foata normal form. 651/1127 useless extension candidates. Maximal degree in co-relation 380. Up to 76 conditions per place. [2023-11-10 11:58:16,812 INFO L140 encePairwiseOnDemand]: 182/214 looper letters, 14 selfloop transitions, 2 changer transitions 25/188 dead transitions. [2023-11-10 11:58:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 188 transitions, 458 flow [2023-11-10 11:58:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:16,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 559 transitions. [2023-11-10 11:58:16,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8707165109034268 [2023-11-10 11:58:16,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 559 transitions. [2023-11-10 11:58:16,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 559 transitions. [2023-11-10 11:58:16,814 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:16,814 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 559 transitions. [2023-11-10 11:58:16,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,816 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,818 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 214.0) internal successors, (856), 4 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,818 INFO L175 Difference]: Start difference. First operand has 190 places, 214 transitions, 468 flow. Second operand 3 states and 559 transitions. [2023-11-10 11:58:16,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 188 transitions, 458 flow [2023-11-10 11:58:16,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 188 transitions, 458 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:16,821 INFO L231 Difference]: Finished difference. Result has 192 places, 160 transitions, 358 flow [2023-11-10 11:58:16,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=192, PETRI_TRANSITIONS=160} [2023-11-10 11:58:16,823 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, 2 predicate places. [2023-11-10 11:58:16,823 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 160 transitions, 358 flow [2023-11-10 11:58:16,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:16,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:16,823 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] [2023-11-10 11:58:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-10 11:58:16,824 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:16,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1707983911, now seen corresponding path program 1 times [2023-11-10 11:58:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:16,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676405679] [2023-11-10 11:58:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:16,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:16,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676405679] [2023-11-10 11:58:16,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676405679] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:16,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454571950] [2023-11-10 11:58:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:16,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:16,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:16,885 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:16,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-10 11:58:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:16,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:16,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:16,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:17,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454571950] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:17,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:17,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:17,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59816119] [2023-11-10 11:58:17,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:17,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:17,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:17,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:17,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 214 [2023-11-10 11:58:17,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 160 transitions, 358 flow. Second operand has 10 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:17,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 214 [2023-11-10 11:58:17,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:17,095 INFO L124 PetriNetUnfolderBase]: 0/200 cut-off events. [2023-11-10 11:58:17,095 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:58:17,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 200 events. 0/200 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 401 event pairs, 0 based on Foata normal form. 2/202 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:58:17,096 INFO L140 encePairwiseOnDemand]: 208/214 looper letters, 15 selfloop transitions, 9 changer transitions 0/170 dead transitions. [2023-11-10 11:58:17,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 170 transitions, 428 flow [2023-11-10 11:58:17,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:17,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1520 transitions. [2023-11-10 11:58:17,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7892004153686397 [2023-11-10 11:58:17,098 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1520 transitions. [2023-11-10 11:58:17,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1520 transitions. [2023-11-10 11:58:17,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:17,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1520 transitions. [2023-11-10 11:58:17,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 168.88888888888889) internal successors, (1520), 9 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,103 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 214.0) internal successors, (2140), 10 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,103 INFO L175 Difference]: Start difference. First operand has 192 places, 160 transitions, 358 flow. Second operand 9 states and 1520 transitions. [2023-11-10 11:58:17,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 170 transitions, 428 flow [2023-11-10 11:58:17,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 170 transitions, 420 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:17,106 INFO L231 Difference]: Finished difference. Result has 181 places, 166 transitions, 400 flow [2023-11-10 11:58:17,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=400, PETRI_PLACES=181, PETRI_TRANSITIONS=166} [2023-11-10 11:58:17,107 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -9 predicate places. [2023-11-10 11:58:17,107 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 166 transitions, 400 flow [2023-11-10 11:58:17,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 168.4) internal successors, (1684), 10 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:17,108 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] [2023-11-10 11:58:17,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:17,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:17,315 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:17,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash -578473066, now seen corresponding path program 1 times [2023-11-10 11:58:17,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:17,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8862236] [2023-11-10 11:58:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:17,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:17,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:17,393 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 11:58:17,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:17,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8862236] [2023-11-10 11:58:17,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8862236] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:17,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726801305] [2023-11-10 11:58:17,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:17,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:17,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:17,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:17,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-10 11:58:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:17,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:17,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:17,542 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 11:58:17,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:17,621 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 11:58:17,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726801305] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:17,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:17,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:17,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266735623] [2023-11-10 11:58:17,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:17,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:17,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:17,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:17,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:17,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 166 out of 214 [2023-11-10 11:58:17,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 166 transitions, 400 flow. Second operand has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:17,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 166 of 214 [2023-11-10 11:58:17,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:17,734 INFO L124 PetriNetUnfolderBase]: 0/180 cut-off events. [2023-11-10 11:58:17,734 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-11-10 11:58:17,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 180 events. 0/180 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 287 event pairs, 0 based on Foata normal form. 2/182 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-11-10 11:58:17,735 INFO L140 encePairwiseOnDemand]: 209/214 looper letters, 15 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2023-11-10 11:58:17,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 166 transitions, 468 flow [2023-11-10 11:58:17,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-10 11:58:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-10 11:58:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2520 transitions. [2023-11-10 11:58:17,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7850467289719626 [2023-11-10 11:58:17,740 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2520 transitions. [2023-11-10 11:58:17,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2520 transitions. [2023-11-10 11:58:17,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:17,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2520 transitions. [2023-11-10 11:58:17,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 168.0) internal successors, (2520), 15 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 214.0) internal successors, (3424), 16 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,750 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 214.0) internal successors, (3424), 16 states have internal predecessors, (3424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,750 INFO L175 Difference]: Start difference. First operand has 181 places, 166 transitions, 400 flow. Second operand 15 states and 2520 transitions. [2023-11-10 11:58:17,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 166 transitions, 468 flow [2023-11-10 11:58:17,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 166 transitions, 451 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-11-10 11:58:17,753 INFO L231 Difference]: Finished difference. Result has 181 places, 159 transitions, 400 flow [2023-11-10 11:58:17,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=214, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=400, PETRI_PLACES=181, PETRI_TRANSITIONS=159} [2023-11-10 11:58:17,755 INFO L281 CegarLoopForPetriNet]: 190 programPoint places, -9 predicate places. [2023-11-10 11:58:17,755 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 159 transitions, 400 flow [2023-11-10 11:58:17,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 168.66666666666666) internal successors, (3036), 18 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:17,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:17,757 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] [2023-11-10 11:58:17,765 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 11:58:17,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:17,962 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:17,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:17,962 INFO L85 PathProgramCache]: Analyzing trace with hash 752341888, now seen corresponding path program 1 times [2023-11-10 11:58:17,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:17,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017811862] [2023-11-10 11:58:17,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:17,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:17,976 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:17,989 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:17,989 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:17,989 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:17,989 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:17,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-10 11:58:17,989 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:17,990 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:17,990 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-10 11:58:18,009 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-10 11:58:18,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 219 places, 248 transitions, 551 flow [2023-11-10 11:58:18,100 INFO L124 PetriNetUnfolderBase]: 140/934 cut-off events. [2023-11-10 11:58:18,100 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-10 11:58:18,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 934 events. 140/934 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4303 event pairs, 23 based on Foata normal form. 0/804 useless extension candidates. Maximal degree in co-relation 627. Up to 80 conditions per place. [2023-11-10 11:58:18,113 INFO L82 GeneralOperation]: Start removeDead. Operand has 219 places, 248 transitions, 551 flow [2023-11-10 11:58:18,120 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 219 places, 248 transitions, 551 flow [2023-11-10 11:58:18,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:18,121 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:18,121 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:18,124 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:18,124 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:58:18,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:18,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:18,124 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] [2023-11-10 11:58:18,124 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:18,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:18,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1168348575, now seen corresponding path program 1 times [2023-11-10 11:58:18,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:18,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685643932] [2023-11-10 11:58:18,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:18,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:18,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:18,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:18,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685643932] [2023-11-10 11:58:18,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685643932] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:18,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:18,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:18,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960756437] [2023-11-10 11:58:18,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:18,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:18,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:18,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:18,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:18,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 248 [2023-11-10 11:58:18,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 248 transitions, 551 flow. Second operand has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:18,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 248 [2023-11-10 11:58:18,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:18,289 INFO L124 PetriNetUnfolderBase]: 53/825 cut-off events. [2023-11-10 11:58:18,289 INFO L125 PetriNetUnfolderBase]: For 343/544 co-relation queries the response was YES. [2023-11-10 11:58:18,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 825 events. 53/825 cut-off events. For 343/544 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3942 event pairs, 23 based on Foata normal form. 1405/2188 useless extension candidates. Maximal degree in co-relation 625. Up to 147 conditions per place. [2023-11-10 11:58:18,295 INFO L140 encePairwiseOnDemand]: 210/248 looper letters, 15 selfloop transitions, 2 changer transitions 26/216 dead transitions. [2023-11-10 11:58:18,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 216 transitions, 533 flow [2023-11-10 11:58:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:18,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 645 transitions. [2023-11-10 11:58:18,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8669354838709677 [2023-11-10 11:58:18,296 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 645 transitions. [2023-11-10 11:58:18,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 645 transitions. [2023-11-10 11:58:18,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:18,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 645 transitions. [2023-11-10 11:58:18,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,299 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 248.0) internal successors, (992), 4 states have internal predecessors, (992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,299 INFO L175 Difference]: Start difference. First operand has 219 places, 248 transitions, 551 flow. Second operand 3 states and 645 transitions. [2023-11-10 11:58:18,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 216 transitions, 533 flow [2023-11-10 11:58:18,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 216 transitions, 533 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:18,303 INFO L231 Difference]: Finished difference. Result has 221 places, 187 transitions, 424 flow [2023-11-10 11:58:18,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=221, PETRI_TRANSITIONS=187} [2023-11-10 11:58:18,304 INFO L281 CegarLoopForPetriNet]: 219 programPoint places, 2 predicate places. [2023-11-10 11:58:18,304 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 187 transitions, 424 flow [2023-11-10 11:58:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:18,305 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] [2023-11-10 11:58:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-10 11:58:18,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:18,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1951346255, now seen corresponding path program 1 times [2023-11-10 11:58:18,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:18,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508490949] [2023-11-10 11:58:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:18,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:18,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508490949] [2023-11-10 11:58:18,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508490949] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:18,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862012450] [2023-11-10 11:58:18,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:18,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:18,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:18,362 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 11:58:18,393 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 11:58:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:18,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:18,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:18,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:18,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:18,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862012450] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:18,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:18,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:18,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102002041] [2023-11-10 11:58:18,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:18,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:18,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:18,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:18,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:18,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 248 [2023-11-10 11:58:18,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 187 transitions, 424 flow. Second operand has 10 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:18,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 248 [2023-11-10 11:58:18,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:18,587 INFO L124 PetriNetUnfolderBase]: 0/246 cut-off events. [2023-11-10 11:58:18,587 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-10 11:58:18,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 325 conditions, 246 events. 0/246 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 560 event pairs, 0 based on Foata normal form. 2/248 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:58:18,588 INFO L140 encePairwiseOnDemand]: 242/248 looper letters, 16 selfloop transitions, 9 changer transitions 0/197 dead transitions. [2023-11-10 11:58:18,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 197 transitions, 496 flow [2023-11-10 11:58:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:18,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1755 transitions. [2023-11-10 11:58:18,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7862903225806451 [2023-11-10 11:58:18,592 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1755 transitions. [2023-11-10 11:58:18,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1755 transitions. [2023-11-10 11:58:18,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:18,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1755 transitions. [2023-11-10 11:58:18,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 195.0) internal successors, (1755), 9 states have internal predecessors, (1755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,598 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,598 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 248.0) internal successors, (2480), 10 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,598 INFO L175 Difference]: Start difference. First operand has 221 places, 187 transitions, 424 flow. Second operand 9 states and 1755 transitions. [2023-11-10 11:58:18,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 197 transitions, 496 flow [2023-11-10 11:58:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 197 transitions, 482 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:18,602 INFO L231 Difference]: Finished difference. Result has 210 places, 193 transitions, 460 flow [2023-11-10 11:58:18,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=460, PETRI_PLACES=210, PETRI_TRANSITIONS=193} [2023-11-10 11:58:18,603 INFO L281 CegarLoopForPetriNet]: 219 programPoint places, -9 predicate places. [2023-11-10 11:58:18,603 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 193 transitions, 460 flow [2023-11-10 11:58:18,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 194.4) internal successors, (1944), 10 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:18,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:18,605 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] [2023-11-10 11:58:18,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:18,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-10 11:58:18,812 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:18,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1850540846, now seen corresponding path program 1 times [2023-11-10 11:58:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640414673] [2023-11-10 11:58:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:18,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:18,883 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 11:58:18,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:18,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640414673] [2023-11-10 11:58:18,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640414673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:18,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118023291] [2023-11-10 11:58:18,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:18,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:18,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:18,884 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:18,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-10 11:58:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:18,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:18,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:19,007 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 11:58:19,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:19,077 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 11:58:19,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118023291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:19,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:19,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:19,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070489040] [2023-11-10 11:58:19,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:19,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:19,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:19,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:19,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:19,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 248 [2023-11-10 11:58:19,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 193 transitions, 460 flow. Second operand has 18 states, 18 states have (on average 194.66666666666666) internal successors, (3504), 18 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:19,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 248 [2023-11-10 11:58:19,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:19,205 INFO L124 PetriNetUnfolderBase]: 0/216 cut-off events. [2023-11-10 11:58:19,206 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-11-10 11:58:19,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311 conditions, 216 events. 0/216 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 385 event pairs, 0 based on Foata normal form. 3/219 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:58:19,206 INFO L140 encePairwiseOnDemand]: 243/248 looper letters, 18 selfloop transitions, 16 changer transitions 0/198 dead transitions. [2023-11-10 11:58:19,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 198 transitions, 564 flow [2023-11-10 11:58:19,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-10 11:58:19,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-10 11:58:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3493 transitions. [2023-11-10 11:58:19,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7824820788530465 [2023-11-10 11:58:19,228 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3493 transitions. [2023-11-10 11:58:19,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3493 transitions. [2023-11-10 11:58:19,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:19,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3493 transitions. [2023-11-10 11:58:19,234 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 194.05555555555554) internal successors, (3493), 18 states have internal predecessors, (3493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,240 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 248.0) internal successors, (4712), 19 states have internal predecessors, (4712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,240 INFO L175 Difference]: Start difference. First operand has 210 places, 193 transitions, 460 flow. Second operand 18 states and 3493 transitions. [2023-11-10 11:58:19,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 198 transitions, 564 flow [2023-11-10 11:58:19,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 198 transitions, 543 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-10 11:58:19,242 INFO L231 Difference]: Finished difference. Result has 213 places, 189 transitions, 479 flow [2023-11-10 11:58:19,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=248, PETRI_DIFFERENCE_MINUEND_FLOW=421, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=479, PETRI_PLACES=213, PETRI_TRANSITIONS=189} [2023-11-10 11:58:19,243 INFO L281 CegarLoopForPetriNet]: 219 programPoint places, -6 predicate places. [2023-11-10 11:58:19,243 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 189 transitions, 479 flow [2023-11-10 11:58:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 194.66666666666666) internal successors, (3504), 18 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:19,244 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:19,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:19,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-10 11:58:19,449 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:19,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash -28438444, now seen corresponding path program 1 times [2023-11-10 11:58:19,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:19,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896546300] [2023-11-10 11:58:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:19,467 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:19,486 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:19,486 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:19,486 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:19,487 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:19,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-10 11:58:19,487 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:19,487 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:19,487 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-10 11:58:19,511 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-10 11:58:19,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 248 places, 282 transitions, 636 flow [2023-11-10 11:58:19,677 INFO L124 PetriNetUnfolderBase]: 263/1590 cut-off events. [2023-11-10 11:58:19,677 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-10 11:58:19,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1816 conditions, 1590 events. 263/1590 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9049 event pairs, 72 based on Foata normal form. 0/1384 useless extension candidates. Maximal degree in co-relation 1033. Up to 192 conditions per place. [2023-11-10 11:58:19,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 248 places, 282 transitions, 636 flow [2023-11-10 11:58:19,714 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 248 places, 282 transitions, 636 flow [2023-11-10 11:58:19,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:19,715 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:19,715 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:19,718 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:19,718 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:58:19,718 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:19,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:19,718 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] [2023-11-10 11:58:19,718 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:19,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:19,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1720046981, now seen corresponding path program 1 times [2023-11-10 11:58:19,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:19,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693653671] [2023-11-10 11:58:19,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:19,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:19,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:19,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:19,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693653671] [2023-11-10 11:58:19,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693653671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:19,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:19,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:19,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386999629] [2023-11-10 11:58:19,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:19,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:19,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:19,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 219 out of 282 [2023-11-10 11:58:19,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 282 transitions, 636 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:19,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 219 of 282 [2023-11-10 11:58:19,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:19,953 INFO L124 PetriNetUnfolderBase]: 134/1438 cut-off events. [2023-11-10 11:58:19,953 INFO L125 PetriNetUnfolderBase]: For 686/894 co-relation queries the response was YES. [2023-11-10 11:58:19,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 1438 events. 134/1438 cut-off events. For 686/894 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8649 event pairs, 72 based on Foata normal form. 2983/4345 useless extension candidates. Maximal degree in co-relation 1075. Up to 298 conditions per place. [2023-11-10 11:58:19,968 INFO L140 encePairwiseOnDemand]: 238/282 looper letters, 16 selfloop transitions, 2 changer transitions 27/244 dead transitions. [2023-11-10 11:58:19,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 244 transitions, 610 flow [2023-11-10 11:58:19,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:19,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 731 transitions. [2023-11-10 11:58:19,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8640661938534279 [2023-11-10 11:58:19,970 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 731 transitions. [2023-11-10 11:58:19,970 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 731 transitions. [2023-11-10 11:58:19,970 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:19,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 731 transitions. [2023-11-10 11:58:19,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,972 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,972 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 282.0) internal successors, (1128), 4 states have internal predecessors, (1128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,972 INFO L175 Difference]: Start difference. First operand has 248 places, 282 transitions, 636 flow. Second operand 3 states and 731 transitions. [2023-11-10 11:58:19,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 244 transitions, 610 flow [2023-11-10 11:58:19,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 244 transitions, 610 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:19,976 INFO L231 Difference]: Finished difference. Result has 250 places, 214 transitions, 492 flow [2023-11-10 11:58:19,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=492, PETRI_PLACES=250, PETRI_TRANSITIONS=214} [2023-11-10 11:58:19,976 INFO L281 CegarLoopForPetriNet]: 248 programPoint places, 2 predicate places. [2023-11-10 11:58:19,976 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 214 transitions, 492 flow [2023-11-10 11:58:19,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:19,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:19,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:19,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-10 11:58:19,977 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:19,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -750320277, now seen corresponding path program 1 times [2023-11-10 11:58:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:19,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499509662] [2023-11-10 11:58:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499509662] [2023-11-10 11:58:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499509662] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469247945] [2023-11-10 11:58:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:20,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:20,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:20,010 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:20,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-10 11:58:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:20,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:20,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:20,107 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:20,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:20,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469247945] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:20,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:20,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:20,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917362467] [2023-11-10 11:58:20,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:20,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:20,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:20,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:20,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:20,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 282 [2023-11-10 11:58:20,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 214 transitions, 492 flow. Second operand has 10 states, 10 states have (on average 220.4) internal successors, (2204), 10 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:20,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 282 [2023-11-10 11:58:20,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:20,228 INFO L124 PetriNetUnfolderBase]: 0/292 cut-off events. [2023-11-10 11:58:20,228 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-10 11:58:20,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 292 events. 0/292 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 725 event pairs, 0 based on Foata normal form. 2/294 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:58:20,229 INFO L140 encePairwiseOnDemand]: 276/282 looper letters, 17 selfloop transitions, 9 changer transitions 0/224 dead transitions. [2023-11-10 11:58:20,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 224 transitions, 566 flow [2023-11-10 11:58:20,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1990 transitions. [2023-11-10 11:58:20,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7840819542947203 [2023-11-10 11:58:20,232 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1990 transitions. [2023-11-10 11:58:20,232 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1990 transitions. [2023-11-10 11:58:20,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:20,233 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1990 transitions. [2023-11-10 11:58:20,235 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 221.11111111111111) internal successors, (1990), 9 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,238 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 282.0) internal successors, (2820), 10 states have internal predecessors, (2820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,238 INFO L175 Difference]: Start difference. First operand has 250 places, 214 transitions, 492 flow. Second operand 9 states and 1990 transitions. [2023-11-10 11:58:20,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 224 transitions, 566 flow [2023-11-10 11:58:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 224 transitions, 544 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:20,241 INFO L231 Difference]: Finished difference. Result has 239 places, 220 transitions, 520 flow [2023-11-10 11:58:20,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=520, PETRI_PLACES=239, PETRI_TRANSITIONS=220} [2023-11-10 11:58:20,243 INFO L281 CegarLoopForPetriNet]: 248 programPoint places, -9 predicate places. [2023-11-10 11:58:20,243 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 220 transitions, 520 flow [2023-11-10 11:58:20,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 220.4) internal successors, (2204), 10 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:20,244 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] [2023-11-10 11:58:20,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:20,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:20,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:20,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:20,453 INFO L85 PathProgramCache]: Analyzing trace with hash -973994456, now seen corresponding path program 1 times [2023-11-10 11:58:20,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:20,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531625946] [2023-11-10 11:58:20,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:20,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:20,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:20,532 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 11:58:20,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531625946] [2023-11-10 11:58:20,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531625946] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:20,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106403749] [2023-11-10 11:58:20,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:20,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:20,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:20,533 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:20,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-10 11:58:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:20,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:20,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:20,656 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 11:58:20,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:20,722 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 11:58:20,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106403749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:20,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:20,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599363117] [2023-11-10 11:58:20,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:20,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:20,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:20,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:20,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:20,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 282 [2023-11-10 11:58:20,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 220 transitions, 520 flow. Second operand has 18 states, 18 states have (on average 220.66666666666666) internal successors, (3972), 18 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:20,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 282 [2023-11-10 11:58:20,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:20,865 INFO L124 PetriNetUnfolderBase]: 0/252 cut-off events. [2023-11-10 11:58:20,865 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-11-10 11:58:20,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 364 conditions, 252 events. 0/252 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 483 event pairs, 0 based on Foata normal form. 4/256 useless extension candidates. Maximal degree in co-relation 0. Up to 9 conditions per place. [2023-11-10 11:58:20,866 INFO L140 encePairwiseOnDemand]: 277/282 looper letters, 21 selfloop transitions, 19 changer transitions 0/230 dead transitions. [2023-11-10 11:58:20,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 230 transitions, 660 flow [2023-11-10 11:58:20,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:20,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 4622 transitions. [2023-11-10 11:58:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7804795677136103 [2023-11-10 11:58:20,872 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 4622 transitions. [2023-11-10 11:58:20,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 4622 transitions. [2023-11-10 11:58:20,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:20,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 4622 transitions. [2023-11-10 11:58:20,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 220.0952380952381) internal successors, (4622), 21 states have internal predecessors, (4622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,887 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 282.0) internal successors, (6204), 22 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,887 INFO L175 Difference]: Start difference. First operand has 239 places, 220 transitions, 520 flow. Second operand 21 states and 4622 transitions. [2023-11-10 11:58:20,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 230 transitions, 660 flow [2023-11-10 11:58:20,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 230 transitions, 635 flow, removed 5 selfloop flow, removed 4 redundant places. [2023-11-10 11:58:20,891 INFO L231 Difference]: Finished difference. Result has 245 places, 219 transitions, 558 flow [2023-11-10 11:58:20,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=282, PETRI_DIFFERENCE_MINUEND_FLOW=481, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=558, PETRI_PLACES=245, PETRI_TRANSITIONS=219} [2023-11-10 11:58:20,891 INFO L281 CegarLoopForPetriNet]: 248 programPoint places, -3 predicate places. [2023-11-10 11:58:20,891 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 219 transitions, 558 flow [2023-11-10 11:58:20,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 220.66666666666666) internal successors, (3972), 18 states have internal predecessors, (3972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:20,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:20,893 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:20,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:21,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:21,097 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:21,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:21,098 INFO L85 PathProgramCache]: Analyzing trace with hash -267888343, now seen corresponding path program 1 times [2023-11-10 11:58:21,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:21,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082816840] [2023-11-10 11:58:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:21,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:21,111 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:21,128 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:21,128 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:21,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:21,128 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:21,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-10 11:58:21,128 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:21,129 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:21,129 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-11-10 11:58:21,159 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-11-10 11:58:21,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 316 transitions, 723 flow [2023-11-10 11:58:21,570 INFO L124 PetriNetUnfolderBase]: 530/2870 cut-off events. [2023-11-10 11:58:21,570 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-11-10 11:58:21,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3361 conditions, 2870 events. 530/2870 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 19773 event pairs, 201 based on Foata normal form. 0/2524 useless extension candidates. Maximal degree in co-relation 1808. Up to 448 conditions per place. [2023-11-10 11:58:21,626 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 316 transitions, 723 flow [2023-11-10 11:58:21,650 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 277 places, 316 transitions, 723 flow [2023-11-10 11:58:21,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:21,651 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:21,651 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:21,654 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:21,654 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:58:21,654 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:21,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:21,654 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] [2023-11-10 11:58:21,654 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:21,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:21,654 INFO L85 PathProgramCache]: Analyzing trace with hash 159520183, now seen corresponding path program 1 times [2023-11-10 11:58:21,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:21,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685808037] [2023-11-10 11:58:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:21,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:21,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:21,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685808037] [2023-11-10 11:58:21,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685808037] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:21,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:21,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:21,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151888686] [2023-11-10 11:58:21,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:21,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:21,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:21,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:21,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:21,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 316 [2023-11-10 11:58:21,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 316 transitions, 723 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:21,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:21,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 316 [2023-11-10 11:58:21,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:22,177 INFO L124 PetriNetUnfolderBase]: 327/2643 cut-off events. [2023-11-10 11:58:22,178 INFO L125 PetriNetUnfolderBase]: For 1475/1703 co-relation queries the response was YES. [2023-11-10 11:58:22,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3764 conditions, 2643 events. 327/2643 cut-off events. For 1475/1703 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 19160 event pairs, 201 based on Foata normal form. 6365/8866 useless extension candidates. Maximal degree in co-relation 1958. Up to 625 conditions per place. [2023-11-10 11:58:22,198 INFO L140 encePairwiseOnDemand]: 266/316 looper letters, 17 selfloop transitions, 2 changer transitions 28/272 dead transitions. [2023-11-10 11:58:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 272 transitions, 689 flow [2023-11-10 11:58:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 817 transitions. [2023-11-10 11:58:22,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8618143459915611 [2023-11-10 11:58:22,200 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 817 transitions. [2023-11-10 11:58:22,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 817 transitions. [2023-11-10 11:58:22,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:22,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 817 transitions. [2023-11-10 11:58:22,201 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,202 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 316.0) internal successors, (1264), 4 states have internal predecessors, (1264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,202 INFO L175 Difference]: Start difference. First operand has 277 places, 316 transitions, 723 flow. Second operand 3 states and 817 transitions. [2023-11-10 11:58:22,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 272 transitions, 689 flow [2023-11-10 11:58:22,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 272 transitions, 689 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:22,205 INFO L231 Difference]: Finished difference. Result has 279 places, 241 transitions, 562 flow [2023-11-10 11:58:22,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=316, PETRI_DIFFERENCE_MINUEND_FLOW=627, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=562, PETRI_PLACES=279, PETRI_TRANSITIONS=241} [2023-11-10 11:58:22,206 INFO L281 CegarLoopForPetriNet]: 277 programPoint places, 2 predicate places. [2023-11-10 11:58:22,206 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 241 transitions, 562 flow [2023-11-10 11:58:22,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:22,207 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] [2023-11-10 11:58:22,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-10 11:58:22,207 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:22,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:22,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1895094023, now seen corresponding path program 1 times [2023-11-10 11:58:22,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:22,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770295007] [2023-11-10 11:58:22,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:22,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:22,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:22,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770295007] [2023-11-10 11:58:22,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770295007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:22,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86100674] [2023-11-10 11:58:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:22,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:22,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:22,238 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:22,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-10 11:58:22,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:22,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:22,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:22,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:22,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:22,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86100674] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:22,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:22,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:22,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676015848] [2023-11-10 11:58:22,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:22,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:22,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:22,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:22,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:22,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 316 [2023-11-10 11:58:22,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 241 transitions, 562 flow. Second operand has 10 states, 10 states have (on average 246.4) internal successors, (2464), 10 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:22,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 316 [2023-11-10 11:58:22,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:22,463 INFO L124 PetriNetUnfolderBase]: 0/338 cut-off events. [2023-11-10 11:58:22,463 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-11-10 11:58:22,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 338 events. 0/338 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 882 event pairs, 0 based on Foata normal form. 2/340 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2023-11-10 11:58:22,464 INFO L140 encePairwiseOnDemand]: 310/316 looper letters, 18 selfloop transitions, 9 changer transitions 0/251 dead transitions. [2023-11-10 11:58:22,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 251 transitions, 638 flow [2023-11-10 11:58:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:22,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:22,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2225 transitions. [2023-11-10 11:58:22,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7823488045007032 [2023-11-10 11:58:22,466 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2225 transitions. [2023-11-10 11:58:22,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2225 transitions. [2023-11-10 11:58:22,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:22,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2225 transitions. [2023-11-10 11:58:22,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 247.22222222222223) internal successors, (2225), 9 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 316.0) internal successors, (3160), 10 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,472 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 316.0) internal successors, (3160), 10 states have internal predecessors, (3160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,472 INFO L175 Difference]: Start difference. First operand has 279 places, 241 transitions, 562 flow. Second operand 9 states and 2225 transitions. [2023-11-10 11:58:22,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 251 transitions, 638 flow [2023-11-10 11:58:22,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 251 transitions, 606 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:22,475 INFO L231 Difference]: Finished difference. Result has 268 places, 247 transitions, 580 flow [2023-11-10 11:58:22,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=316, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=580, PETRI_PLACES=268, PETRI_TRANSITIONS=247} [2023-11-10 11:58:22,476 INFO L281 CegarLoopForPetriNet]: 277 programPoint places, -9 predicate places. [2023-11-10 11:58:22,476 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 247 transitions, 580 flow [2023-11-10 11:58:22,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 246.4) internal successors, (2464), 10 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:22,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:22,477 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:22,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:22,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:22,682 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:22,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:22,683 INFO L85 PathProgramCache]: Analyzing trace with hash -462144380, now seen corresponding path program 1 times [2023-11-10 11:58:22,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:22,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553279847] [2023-11-10 11:58:22,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:22,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:22,761 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 11:58:22,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553279847] [2023-11-10 11:58:22,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553279847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:22,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310029706] [2023-11-10 11:58:22,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:22,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:22,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:22,763 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:22,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-10 11:58:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:22,866 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:22,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:22,929 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 11:58:22,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:23,002 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 11:58:23,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310029706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:23,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:23,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:23,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624005801] [2023-11-10 11:58:23,003 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:23,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:23,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:23,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:23,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:23,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 316 [2023-11-10 11:58:23,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 247 transitions, 580 flow. Second operand has 18 states, 18 states have (on average 246.66666666666666) internal successors, (4440), 18 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:23,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:23,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 316 [2023-11-10 11:58:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:23,181 INFO L124 PetriNetUnfolderBase]: 0/298 cut-off events. [2023-11-10 11:58:23,181 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-11-10 11:58:23,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 298 events. 0/298 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 630 event pairs, 0 based on Foata normal form. 4/302 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:58:23,182 INFO L140 encePairwiseOnDemand]: 310/316 looper letters, 26 selfloop transitions, 21 changer transitions 0/271 dead transitions. [2023-11-10 11:58:23,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 271 transitions, 782 flow [2023-11-10 11:58:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:23,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:23,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5175 transitions. [2023-11-10 11:58:23,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7798372513562387 [2023-11-10 11:58:23,186 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5175 transitions. [2023-11-10 11:58:23,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5175 transitions. [2023-11-10 11:58:23,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:23,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5175 transitions. [2023-11-10 11:58:23,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 246.42857142857142) internal successors, (5175), 21 states have internal predecessors, (5175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:23,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 316.0) internal successors, (6952), 22 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:23,197 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 316.0) internal successors, (6952), 22 states have internal predecessors, (6952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:23,197 INFO L175 Difference]: Start difference. First operand has 268 places, 247 transitions, 580 flow. Second operand 21 states and 5175 transitions. [2023-11-10 11:58:23,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 271 transitions, 782 flow [2023-11-10 11:58:23,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 271 transitions, 768 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:23,201 INFO L231 Difference]: Finished difference. Result has 292 places, 260 transitions, 704 flow [2023-11-10 11:58:23,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=316, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=704, PETRI_PLACES=292, PETRI_TRANSITIONS=260} [2023-11-10 11:58:23,202 INFO L281 CegarLoopForPetriNet]: 277 programPoint places, 15 predicate places. [2023-11-10 11:58:23,202 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 260 transitions, 704 flow [2023-11-10 11:58:23,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 246.66666666666666) internal successors, (4440), 18 states have internal predecessors, (4440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:23,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:23,203 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:23,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:23,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-10 11:58:23,408 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:23,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:23,408 INFO L85 PathProgramCache]: Analyzing trace with hash -672049025, now seen corresponding path program 1 times [2023-11-10 11:58:23,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:23,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799730538] [2023-11-10 11:58:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:23,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:23,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:23,422 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:23,437 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:23,438 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:23,438 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:23,438 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:23,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-10 11:58:23,438 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:58:23,438 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:23,438 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-11-10 11:58:23,460 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-11-10 11:58:23,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 306 places, 350 transitions, 812 flow [2023-11-10 11:58:24,445 INFO L124 PetriNetUnfolderBase]: 1117/5430 cut-off events. [2023-11-10 11:58:24,445 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-11-10 11:58:24,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6507 conditions, 5430 events. 1117/5430 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 44444 event pairs, 522 based on Foata normal form. 0/4816 useless extension candidates. Maximal degree in co-relation 3352. Up to 1024 conditions per place. [2023-11-10 11:58:24,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 306 places, 350 transitions, 812 flow [2023-11-10 11:58:24,571 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 306 places, 350 transitions, 812 flow [2023-11-10 11:58:24,572 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:24,572 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:24,572 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:24,575 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:24,575 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:58:24,575 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:24,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:24,575 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] [2023-11-10 11:58:24,575 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:24,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:24,575 INFO L85 PathProgramCache]: Analyzing trace with hash 175385621, now seen corresponding path program 1 times [2023-11-10 11:58:24,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:24,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852977180] [2023-11-10 11:58:24,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:24,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:24,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:24,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:24,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852977180] [2023-11-10 11:58:24,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852977180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:24,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:24,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:24,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333811203] [2023-11-10 11:58:24,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:24,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:24,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:24,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:24,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:24,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 271 out of 350 [2023-11-10 11:58:24,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 350 transitions, 812 flow. Second operand has 3 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:24,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:24,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 271 of 350 [2023-11-10 11:58:24,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:25,656 INFO L124 PetriNetUnfolderBase]: 776/5064 cut-off events. [2023-11-10 11:58:25,656 INFO L125 PetriNetUnfolderBase]: For 3184/3324 co-relation queries the response was YES. [2023-11-10 11:58:25,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7482 conditions, 5064 events. 776/5064 cut-off events. For 3184/3324 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 42856 event pairs, 522 based on Foata normal form. 13691/18483 useless extension candidates. Maximal degree in co-relation 3755. Up to 1336 conditions per place. [2023-11-10 11:58:25,700 INFO L140 encePairwiseOnDemand]: 294/350 looper letters, 18 selfloop transitions, 2 changer transitions 29/300 dead transitions. [2023-11-10 11:58:25,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 300 transitions, 770 flow [2023-11-10 11:58:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:25,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:25,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 903 transitions. [2023-11-10 11:58:25,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.86 [2023-11-10 11:58:25,703 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 903 transitions. [2023-11-10 11:58:25,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 903 transitions. [2023-11-10 11:58:25,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:25,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 903 transitions. [2023-11-10 11:58:25,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 301.0) internal successors, (903), 3 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:25,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:25,705 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 350.0) internal successors, (1400), 4 states have internal predecessors, (1400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:25,705 INFO L175 Difference]: Start difference. First operand has 306 places, 350 transitions, 812 flow. Second operand 3 states and 903 transitions. [2023-11-10 11:58:25,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 300 transitions, 770 flow [2023-11-10 11:58:25,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 300 transitions, 770 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:25,710 INFO L231 Difference]: Finished difference. Result has 308 places, 268 transitions, 634 flow [2023-11-10 11:58:25,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=634, PETRI_PLACES=308, PETRI_TRANSITIONS=268} [2023-11-10 11:58:25,710 INFO L281 CegarLoopForPetriNet]: 306 programPoint places, 2 predicate places. [2023-11-10 11:58:25,710 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 268 transitions, 634 flow [2023-11-10 11:58:25,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 272.3333333333333) internal successors, (817), 3 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:25,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:25,711 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] [2023-11-10 11:58:25,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2023-11-10 11:58:25,711 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:25,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:25,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1689929349, now seen corresponding path program 1 times [2023-11-10 11:58:25,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:25,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798832781] [2023-11-10 11:58:25,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:25,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:25,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:25,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:25,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798832781] [2023-11-10 11:58:25,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798832781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:25,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314394365] [2023-11-10 11:58:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:25,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:25,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:25,745 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:25,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-10 11:58:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:25,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:25,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:25,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:25,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:25,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314394365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:25,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:25,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:25,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764669634] [2023-11-10 11:58:25,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:25,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:25,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:25,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 350 [2023-11-10 11:58:25,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 268 transitions, 634 flow. Second operand has 10 states, 10 states have (on average 272.4) internal successors, (2724), 10 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:25,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:25,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 350 [2023-11-10 11:58:25,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:26,013 INFO L124 PetriNetUnfolderBase]: 0/384 cut-off events. [2023-11-10 11:58:26,013 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:58:26,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 520 conditions, 384 events. 0/384 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1043 event pairs, 0 based on Foata normal form. 2/386 useless extension candidates. Maximal degree in co-relation 0. Up to 27 conditions per place. [2023-11-10 11:58:26,014 INFO L140 encePairwiseOnDemand]: 344/350 looper letters, 19 selfloop transitions, 9 changer transitions 0/278 dead transitions. [2023-11-10 11:58:26,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 278 transitions, 712 flow [2023-11-10 11:58:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:26,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2460 transitions. [2023-11-10 11:58:26,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.780952380952381 [2023-11-10 11:58:26,018 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2460 transitions. [2023-11-10 11:58:26,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2460 transitions. [2023-11-10 11:58:26,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:26,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2460 transitions. [2023-11-10 11:58:26,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 273.3333333333333) internal successors, (2460), 9 states have internal predecessors, (2460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,024 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 350.0) internal successors, (3500), 10 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,024 INFO L175 Difference]: Start difference. First operand has 308 places, 268 transitions, 634 flow. Second operand 9 states and 2460 transitions. [2023-11-10 11:58:26,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 278 transitions, 712 flow [2023-11-10 11:58:26,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 278 transitions, 668 flow, removed 21 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:26,028 INFO L231 Difference]: Finished difference. Result has 297 places, 274 transitions, 640 flow [2023-11-10 11:58:26,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=640, PETRI_PLACES=297, PETRI_TRANSITIONS=274} [2023-11-10 11:58:26,028 INFO L281 CegarLoopForPetriNet]: 306 programPoint places, -9 predicate places. [2023-11-10 11:58:26,028 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 274 transitions, 640 flow [2023-11-10 11:58:26,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 272.4) internal successors, (2724), 10 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:26,029 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] [2023-11-10 11:58:26,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:26,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-10 11:58:26,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:26,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:26,234 INFO L85 PathProgramCache]: Analyzing trace with hash -908876222, now seen corresponding path program 1 times [2023-11-10 11:58:26,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:26,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976524954] [2023-11-10 11:58:26,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:26,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:26,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:26,327 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 11:58:26,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:26,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976524954] [2023-11-10 11:58:26,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976524954] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:26,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789908553] [2023-11-10 11:58:26,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:26,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:26,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:26,329 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:26,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-10 11:58:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:26,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:26,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:26,497 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 11:58:26,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:26,577 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 11:58:26,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789908553] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:26,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:26,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:26,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068282477] [2023-11-10 11:58:26,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:26,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:26,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:26,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:26,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:26,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 350 [2023-11-10 11:58:26,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 274 transitions, 640 flow. Second operand has 18 states, 18 states have (on average 272.6666666666667) internal successors, (4908), 18 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:26,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 350 [2023-11-10 11:58:26,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:26,835 INFO L124 PetriNetUnfolderBase]: 0/344 cut-off events. [2023-11-10 11:58:26,835 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2023-11-10 11:58:26,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 344 events. 0/344 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 791 event pairs, 0 based on Foata normal form. 4/348 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2023-11-10 11:58:26,836 INFO L140 encePairwiseOnDemand]: 344/350 looper letters, 27 selfloop transitions, 21 changer transitions 0/298 dead transitions. [2023-11-10 11:58:26,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 298 transitions, 844 flow [2023-11-10 11:58:26,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:26,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:26,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 5722 transitions. [2023-11-10 11:58:26,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7785034013605442 [2023-11-10 11:58:26,841 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 5722 transitions. [2023-11-10 11:58:26,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 5722 transitions. [2023-11-10 11:58:26,842 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:26,842 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 5722 transitions. [2023-11-10 11:58:26,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 272.4761904761905) internal successors, (5722), 21 states have internal predecessors, (5722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 350.0) internal successors, (7700), 22 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,853 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 350.0) internal successors, (7700), 22 states have internal predecessors, (7700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,853 INFO L175 Difference]: Start difference. First operand has 297 places, 274 transitions, 640 flow. Second operand 21 states and 5722 transitions. [2023-11-10 11:58:26,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 298 transitions, 844 flow [2023-11-10 11:58:26,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 298 transitions, 830 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:26,857 INFO L231 Difference]: Finished difference. Result has 321 places, 287 transitions, 764 flow [2023-11-10 11:58:26,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=634, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=764, PETRI_PLACES=321, PETRI_TRANSITIONS=287} [2023-11-10 11:58:26,857 INFO L281 CegarLoopForPetriNet]: 306 programPoint places, 15 predicate places. [2023-11-10 11:58:26,857 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 287 transitions, 764 flow [2023-11-10 11:58:26,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 272.6666666666667) internal successors, (4908), 18 states have internal predecessors, (4908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:26,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:26,858 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:26,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:27,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-10 11:58:27,065 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:27,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:27,065 INFO L85 PathProgramCache]: Analyzing trace with hash 2078094384, now seen corresponding path program 1 times [2023-11-10 11:58:27,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:27,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060925841] [2023-11-10 11:58:27,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:27,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:27,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060925841] [2023-11-10 11:58:27,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060925841] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:27,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398946028] [2023-11-10 11:58:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:27,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:27,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:27,262 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:27,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-10 11:58:27,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:27,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:58:27,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:27,470 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:27,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:27,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398946028] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:27,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:27,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:58:27,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227417488] [2023-11-10 11:58:27,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:27,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:58:27,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:58:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:58:27,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 270 out of 350 [2023-11-10 11:58:27,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 287 transitions, 764 flow. Second operand has 34 states, 34 states have (on average 272.8235294117647) internal successors, (9276), 34 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:27,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:27,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 270 of 350 [2023-11-10 11:58:27,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:27,975 INFO L124 PetriNetUnfolderBase]: 0/324 cut-off events. [2023-11-10 11:58:27,975 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:58:27,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 324 events. 0/324 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 679 event pairs, 0 based on Foata normal form. 2/326 useless extension candidates. Maximal degree in co-relation 0. Up to 13 conditions per place. [2023-11-10 11:58:27,976 INFO L140 encePairwiseOnDemand]: 345/350 looper letters, 27 selfloop transitions, 25 changer transitions 0/294 dead transitions. [2023-11-10 11:58:27,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 294 transitions, 914 flow [2023-11-10 11:58:27,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-10 11:58:27,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-11-10 11:58:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 7344 transitions. [2023-11-10 11:58:27,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7771428571428571 [2023-11-10 11:58:27,981 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 7344 transitions. [2023-11-10 11:58:27,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 7344 transitions. [2023-11-10 11:58:27,983 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:27,983 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 7344 transitions. [2023-11-10 11:58:27,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 272.0) internal successors, (7344), 27 states have internal predecessors, (7344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:27,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 350.0) internal successors, (9800), 28 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:27,997 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 350.0) internal successors, (9800), 28 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:27,997 INFO L175 Difference]: Start difference. First operand has 321 places, 287 transitions, 764 flow. Second operand 27 states and 7344 transitions. [2023-11-10 11:58:27,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 294 transitions, 914 flow [2023-11-10 11:58:27,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 294 transitions, 860 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-11-10 11:58:28,002 INFO L231 Difference]: Finished difference. Result has 324 places, 280 transitions, 753 flow [2023-11-10 11:58:28,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=350, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=753, PETRI_PLACES=324, PETRI_TRANSITIONS=280} [2023-11-10 11:58:28,002 INFO L281 CegarLoopForPetriNet]: 306 programPoint places, 18 predicate places. [2023-11-10 11:58:28,002 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 280 transitions, 753 flow [2023-11-10 11:58:28,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 272.8235294117647) internal successors, (9276), 34 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:28,003 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:28,004 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:28,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:28,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-10 11:58:28,209 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:28,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:28,209 INFO L85 PathProgramCache]: Analyzing trace with hash -700585770, now seen corresponding path program 1 times [2023-11-10 11:58:28,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:28,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577087753] [2023-11-10 11:58:28,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:28,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:28,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:28,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:28,243 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:28,243 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:28,243 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:28,243 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:28,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-11-10 11:58:28,244 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:58:28,244 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:28,244 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-11-10 11:58:28,275 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-11-10 11:58:28,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 384 transitions, 903 flow [2023-11-10 11:58:30,198 INFO L124 PetriNetUnfolderBase]: 2408/10614 cut-off events. [2023-11-10 11:58:30,198 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-11-10 11:58:30,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12982 conditions, 10614 events. 2408/10614 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 100635 event pairs, 1291 based on Foata normal form. 0/9476 useless extension candidates. Maximal degree in co-relation 6497. Up to 2304 conditions per place. [2023-11-10 11:58:30,376 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 384 transitions, 903 flow [2023-11-10 11:58:30,471 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 384 transitions, 903 flow [2023-11-10 11:58:30,472 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:30,472 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:30,472 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:30,475 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:30,475 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:58:30,475 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:30,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:30,475 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] [2023-11-10 11:58:30,476 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:30,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1672450667, now seen corresponding path program 1 times [2023-11-10 11:58:30,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:30,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205813451] [2023-11-10 11:58:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:30,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:30,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:30,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205813451] [2023-11-10 11:58:30,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205813451] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:30,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:30,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508202719] [2023-11-10 11:58:30,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:30,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:30,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:30,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 384 [2023-11-10 11:58:30,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 384 transitions, 903 flow. Second operand has 3 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:30,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:30,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 384 [2023-11-10 11:58:30,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:32,824 INFO L124 PetriNetUnfolderBase]: 1801/9981 cut-off events. [2023-11-10 11:58:32,824 INFO L125 PetriNetUnfolderBase]: For 7068/7228 co-relation queries the response was YES. [2023-11-10 11:58:32,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15233 conditions, 9981 events. 1801/9981 cut-off events. For 7068/7228 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 98005 event pairs, 1291 based on Foata normal form. 29637/39088 useless extension candidates. Maximal degree in co-relation 7473. Up to 2879 conditions per place. [2023-11-10 11:58:32,909 INFO L140 encePairwiseOnDemand]: 322/384 looper letters, 19 selfloop transitions, 2 changer transitions 30/328 dead transitions. [2023-11-10 11:58:32,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 328 transitions, 853 flow [2023-11-10 11:58:32,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:32,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 989 transitions. [2023-11-10 11:58:32,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8585069444444444 [2023-11-10 11:58:32,914 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 989 transitions. [2023-11-10 11:58:32,914 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 989 transitions. [2023-11-10 11:58:32,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:32,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 989 transitions. [2023-11-10 11:58:32,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 329.6666666666667) internal successors, (989), 3 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:32,916 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:32,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 384.0) internal successors, (1536), 4 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:32,916 INFO L175 Difference]: Start difference. First operand has 335 places, 384 transitions, 903 flow. Second operand 3 states and 989 transitions. [2023-11-10 11:58:32,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 328 transitions, 853 flow [2023-11-10 11:58:32,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 328 transitions, 853 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:32,921 INFO L231 Difference]: Finished difference. Result has 337 places, 295 transitions, 708 flow [2023-11-10 11:58:32,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=708, PETRI_PLACES=337, PETRI_TRANSITIONS=295} [2023-11-10 11:58:32,922 INFO L281 CegarLoopForPetriNet]: 335 programPoint places, 2 predicate places. [2023-11-10 11:58:32,922 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 295 transitions, 708 flow [2023-11-10 11:58:32,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:32,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:32,922 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] [2023-11-10 11:58:32,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-10 11:58:32,923 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:32,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:32,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1365814299, now seen corresponding path program 1 times [2023-11-10 11:58:32,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:32,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351115657] [2023-11-10 11:58:32,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:32,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:32,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351115657] [2023-11-10 11:58:32,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351115657] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:32,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145421151] [2023-11-10 11:58:32,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:32,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:32,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:32,955 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:32,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-10 11:58:33,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:33,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:33,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:33,090 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:33,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:33,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145421151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:33,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:33,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:33,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993785788] [2023-11-10 11:58:33,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:33,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:33,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:33,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:33,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:33,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 384 [2023-11-10 11:58:33,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 295 transitions, 708 flow. Second operand has 10 states, 10 states have (on average 298.4) internal successors, (2984), 10 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:33,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 384 [2023-11-10 11:58:33,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:33,226 INFO L124 PetriNetUnfolderBase]: 0/430 cut-off events. [2023-11-10 11:58:33,226 INFO L125 PetriNetUnfolderBase]: For 159/159 co-relation queries the response was YES. [2023-11-10 11:58:33,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587 conditions, 430 events. 0/430 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1205 event pairs, 0 based on Foata normal form. 2/432 useless extension candidates. Maximal degree in co-relation 0. Up to 31 conditions per place. [2023-11-10 11:58:33,227 INFO L140 encePairwiseOnDemand]: 378/384 looper letters, 20 selfloop transitions, 9 changer transitions 0/305 dead transitions. [2023-11-10 11:58:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 305 transitions, 788 flow [2023-11-10 11:58:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:33,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:33,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2695 transitions. [2023-11-10 11:58:33,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7798032407407407 [2023-11-10 11:58:33,229 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2695 transitions. [2023-11-10 11:58:33,229 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2695 transitions. [2023-11-10 11:58:33,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:33,230 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2695 transitions. [2023-11-10 11:58:33,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 299.44444444444446) internal successors, (2695), 9 states have internal predecessors, (2695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,234 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 384.0) internal successors, (3840), 10 states have internal predecessors, (3840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,234 INFO L175 Difference]: Start difference. First operand has 337 places, 295 transitions, 708 flow. Second operand 9 states and 2695 transitions. [2023-11-10 11:58:33,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 305 transitions, 788 flow [2023-11-10 11:58:33,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 305 transitions, 730 flow, removed 28 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:33,238 INFO L231 Difference]: Finished difference. Result has 326 places, 301 transitions, 700 flow [2023-11-10 11:58:33,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=650, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=700, PETRI_PLACES=326, PETRI_TRANSITIONS=301} [2023-11-10 11:58:33,238 INFO L281 CegarLoopForPetriNet]: 335 programPoint places, -9 predicate places. [2023-11-10 11:58:33,239 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 301 transitions, 700 flow [2023-11-10 11:58:33,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 298.4) internal successors, (2984), 10 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:33,239 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] [2023-11-10 11:58:33,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:33,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:33,443 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:33,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:33,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1980777314, now seen corresponding path program 1 times [2023-11-10 11:58:33,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:33,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148218519] [2023-11-10 11:58:33,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:33,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:33,506 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 11:58:33,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:33,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148218519] [2023-11-10 11:58:33,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148218519] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:33,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469337547] [2023-11-10 11:58:33,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:33,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:33,507 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:33,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-10 11:58:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:33,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:33,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:33,654 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 11:58:33,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:33,724 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 11:58:33,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469337547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:33,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:33,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690119962] [2023-11-10 11:58:33,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:33,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:33,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:33,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 384 [2023-11-10 11:58:33,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 301 transitions, 700 flow. Second operand has 18 states, 18 states have (on average 298.6666666666667) internal successors, (5376), 18 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:33,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 384 [2023-11-10 11:58:33,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:33,912 INFO L124 PetriNetUnfolderBase]: 0/390 cut-off events. [2023-11-10 11:58:33,912 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-11-10 11:58:33,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 390 events. 0/390 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 952 event pairs, 0 based on Foata normal form. 4/394 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:58:33,913 INFO L140 encePairwiseOnDemand]: 378/384 looper letters, 28 selfloop transitions, 21 changer transitions 0/325 dead transitions. [2023-11-10 11:58:33,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 325 transitions, 906 flow [2023-11-10 11:58:33,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:33,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6269 transitions. [2023-11-10 11:58:33,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.777405753968254 [2023-11-10 11:58:33,917 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6269 transitions. [2023-11-10 11:58:33,917 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6269 transitions. [2023-11-10 11:58:33,918 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:33,918 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6269 transitions. [2023-11-10 11:58:33,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 298.5238095238095) internal successors, (6269), 21 states have internal predecessors, (6269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 384.0) internal successors, (8448), 22 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,927 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 384.0) internal successors, (8448), 22 states have internal predecessors, (8448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,927 INFO L175 Difference]: Start difference. First operand has 326 places, 301 transitions, 700 flow. Second operand 21 states and 6269 transitions. [2023-11-10 11:58:33,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 325 transitions, 906 flow [2023-11-10 11:58:33,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 325 transitions, 892 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:33,932 INFO L231 Difference]: Finished difference. Result has 350 places, 314 transitions, 824 flow [2023-11-10 11:58:33,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=694, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=824, PETRI_PLACES=350, PETRI_TRANSITIONS=314} [2023-11-10 11:58:33,933 INFO L281 CegarLoopForPetriNet]: 335 programPoint places, 15 predicate places. [2023-11-10 11:58:33,933 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 314 transitions, 824 flow [2023-11-10 11:58:33,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 298.6666666666667) internal successors, (5376), 18 states have internal predecessors, (5376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:33,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:33,934 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:33,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:34,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:34,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:34,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:34,139 INFO L85 PathProgramCache]: Analyzing trace with hash -799485744, now seen corresponding path program 1 times [2023-11-10 11:58:34,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:34,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599094408] [2023-11-10 11:58:34,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:34,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:34,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599094408] [2023-11-10 11:58:34,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599094408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:34,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789177969] [2023-11-10 11:58:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:34,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:34,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:34,296 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:34,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-10 11:58:34,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:34,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:58:34,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:34,507 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:34,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:34,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789177969] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:34,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:34,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:58:34,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006511577] [2023-11-10 11:58:34,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:34,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:58:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:58:34,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:58:34,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 296 out of 384 [2023-11-10 11:58:34,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 314 transitions, 824 flow. Second operand has 34 states, 34 states have (on average 298.8235294117647) internal successors, (10160), 34 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:34,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:34,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 296 of 384 [2023-11-10 11:58:34,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:35,130 INFO L124 PetriNetUnfolderBase]: 0/360 cut-off events. [2023-11-10 11:58:35,131 INFO L125 PetriNetUnfolderBase]: For 150/150 co-relation queries the response was YES. [2023-11-10 11:58:35,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564 conditions, 360 events. 0/360 cut-off events. For 150/150 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 777 event pairs, 0 based on Foata normal form. 3/363 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:58:35,131 INFO L140 encePairwiseOnDemand]: 379/384 looper letters, 30 selfloop transitions, 28 changer transitions 0/326 dead transitions. [2023-11-10 11:58:35,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 326 transitions, 1020 flow [2023-11-10 11:58:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-10 11:58:35,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-10 11:58:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 8941 transitions. [2023-11-10 11:58:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7761284722222223 [2023-11-10 11:58:35,144 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 8941 transitions. [2023-11-10 11:58:35,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 8941 transitions. [2023-11-10 11:58:35,146 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:35,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 8941 transitions. [2023-11-10 11:58:35,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 298.03333333333336) internal successors, (8941), 30 states have internal predecessors, (8941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:35,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 384.0) internal successors, (11904), 31 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:35,165 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 384.0) internal successors, (11904), 31 states have internal predecessors, (11904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:35,165 INFO L175 Difference]: Start difference. First operand has 350 places, 314 transitions, 824 flow. Second operand 30 states and 8941 transitions. [2023-11-10 11:58:35,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 326 transitions, 1020 flow [2023-11-10 11:58:35,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 326 transitions, 960 flow, removed 8 selfloop flow, removed 13 redundant places. [2023-11-10 11:58:35,171 INFO L231 Difference]: Finished difference. Result has 356 places, 310 transitions, 837 flow [2023-11-10 11:58:35,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=384, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=837, PETRI_PLACES=356, PETRI_TRANSITIONS=310} [2023-11-10 11:58:35,171 INFO L281 CegarLoopForPetriNet]: 335 programPoint places, 21 predicate places. [2023-11-10 11:58:35,171 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 310 transitions, 837 flow [2023-11-10 11:58:35,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 298.8235294117647) internal successors, (10160), 34 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:35,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:35,173 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:35,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:35,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-10 11:58:35,377 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:35,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:35,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1564404562, now seen corresponding path program 1 times [2023-11-10 11:58:35,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:35,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107271889] [2023-11-10 11:58:35,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:35,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:35,402 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:35,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:35,428 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:35,428 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:35,428 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:35,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:35,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-11-10 11:58:35,428 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:58:35,429 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:35,429 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-11-10 11:58:35,456 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-11-10 11:58:35,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 364 places, 418 transitions, 996 flow [2023-11-10 11:58:40,061 INFO L124 PetriNetUnfolderBase]: 5235/21174 cut-off events. [2023-11-10 11:58:40,061 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-11-10 11:58:40,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26370 conditions, 21174 events. 5235/21174 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 227458 event pairs, 3084 based on Foata normal form. 0/19000 useless extension candidates. Maximal degree in co-relation 12971. Up to 5120 conditions per place. [2023-11-10 11:58:40,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 364 places, 418 transitions, 996 flow [2023-11-10 11:58:40,689 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 364 places, 418 transitions, 996 flow [2023-11-10 11:58:40,689 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:58:40,691 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:58:40,691 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:58:40,694 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:58:40,694 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:58:40,695 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:58:40,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:40,695 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] [2023-11-10 11:58:40,695 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:40,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:40,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1089021385, now seen corresponding path program 1 times [2023-11-10 11:58:40,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:40,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770177438] [2023-11-10 11:58:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:40,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770177438] [2023-11-10 11:58:40,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770177438] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:58:40,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:58:40,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:58:40,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697320433] [2023-11-10 11:58:40,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:58:40,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:58:40,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:58:40,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:58:40,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 323 out of 418 [2023-11-10 11:58:40,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 418 transitions, 996 flow. Second operand has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:40,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:40,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 323 of 418 [2023-11-10 11:58:40,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:45,794 INFO L124 PetriNetUnfolderBase]: 4106/20018 cut-off events. [2023-11-10 11:58:45,794 INFO L125 PetriNetUnfolderBase]: For 15570/15750 co-relation queries the response was YES. [2023-11-10 11:58:45,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31433 conditions, 20018 events. 4106/20018 cut-off events. For 15570/15750 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 221563 event pairs, 3084 based on Foata normal form. 64311/83285 useless extension candidates. Maximal degree in co-relation 15224. Up to 6214 conditions per place. [2023-11-10 11:58:46,105 INFO L140 encePairwiseOnDemand]: 350/418 looper letters, 20 selfloop transitions, 2 changer transitions 31/356 dead transitions. [2023-11-10 11:58:46,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 356 transitions, 938 flow [2023-11-10 11:58:46,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:58:46,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:58:46,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1075 transitions. [2023-11-10 11:58:46,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8572567783094099 [2023-11-10 11:58:46,108 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1075 transitions. [2023-11-10 11:58:46,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1075 transitions. [2023-11-10 11:58:46,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:46,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1075 transitions. [2023-11-10 11:58:46,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 358.3333333333333) internal successors, (1075), 3 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 418.0) internal successors, (1672), 4 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,122 INFO L175 Difference]: Start difference. First operand has 364 places, 418 transitions, 996 flow. Second operand 3 states and 1075 transitions. [2023-11-10 11:58:46,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 356 transitions, 938 flow [2023-11-10 11:58:46,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 356 transitions, 938 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:58:46,128 INFO L231 Difference]: Finished difference. Result has 366 places, 322 transitions, 784 flow [2023-11-10 11:58:46,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=784, PETRI_PLACES=366, PETRI_TRANSITIONS=322} [2023-11-10 11:58:46,129 INFO L281 CegarLoopForPetriNet]: 364 programPoint places, 2 predicate places. [2023-11-10 11:58:46,129 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 322 transitions, 784 flow [2023-11-10 11:58:46,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 324.3333333333333) internal successors, (973), 3 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:46,129 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] [2023-11-10 11:58:46,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2023-11-10 11:58:46,129 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:46,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1317797671, now seen corresponding path program 1 times [2023-11-10 11:58:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:46,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027603347] [2023-11-10 11:58:46,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027603347] [2023-11-10 11:58:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027603347] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925240081] [2023-11-10 11:58:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:46,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:46,161 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:46,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-10 11:58:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:46,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:58:46,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:46,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:46,326 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:46,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:46,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925240081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:46,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:46,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:58:46,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675169179] [2023-11-10 11:58:46,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:46,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:58:46,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:46,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:58:46,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:58:46,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 418 [2023-11-10 11:58:46,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 322 transitions, 784 flow. Second operand has 10 states, 10 states have (on average 324.4) internal successors, (3244), 10 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:46,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 418 [2023-11-10 11:58:46,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:46,472 INFO L124 PetriNetUnfolderBase]: 0/476 cut-off events. [2023-11-10 11:58:46,472 INFO L125 PetriNetUnfolderBase]: For 213/213 co-relation queries the response was YES. [2023-11-10 11:58:46,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655 conditions, 476 events. 0/476 cut-off events. For 213/213 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1365 event pairs, 0 based on Foata normal form. 2/478 useless extension candidates. Maximal degree in co-relation 0. Up to 35 conditions per place. [2023-11-10 11:58:46,473 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 21 selfloop transitions, 9 changer transitions 0/332 dead transitions. [2023-11-10 11:58:46,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 332 transitions, 866 flow [2023-11-10 11:58:46,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:58:46,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:58:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2930 transitions. [2023-11-10 11:58:46,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7788410419989368 [2023-11-10 11:58:46,477 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2930 transitions. [2023-11-10 11:58:46,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2930 transitions. [2023-11-10 11:58:46,477 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:46,477 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2930 transitions. [2023-11-10 11:58:46,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 325.55555555555554) internal successors, (2930), 9 states have internal predecessors, (2930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 418.0) internal successors, (4180), 10 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,481 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 418.0) internal successors, (4180), 10 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,481 INFO L175 Difference]: Start difference. First operand has 366 places, 322 transitions, 784 flow. Second operand 9 states and 2930 transitions. [2023-11-10 11:58:46,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 332 transitions, 866 flow [2023-11-10 11:58:46,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 332 transitions, 792 flow, removed 36 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:46,485 INFO L231 Difference]: Finished difference. Result has 355 places, 328 transitions, 760 flow [2023-11-10 11:58:46,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=760, PETRI_PLACES=355, PETRI_TRANSITIONS=328} [2023-11-10 11:58:46,486 INFO L281 CegarLoopForPetriNet]: 364 programPoint places, -9 predicate places. [2023-11-10 11:58:46,486 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 328 transitions, 760 flow [2023-11-10 11:58:46,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 324.4) internal successors, (3244), 10 states have internal predecessors, (3244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:46,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:46,486 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] [2023-11-10 11:58:46,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:46,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:46,690 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:46,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:46,690 INFO L85 PathProgramCache]: Analyzing trace with hash -383118364, now seen corresponding path program 1 times [2023-11-10 11:58:46,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:46,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950323492] [2023-11-10 11:58:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:46,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:46,760 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 11:58:46,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:46,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950323492] [2023-11-10 11:58:46,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950323492] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:46,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959126151] [2023-11-10 11:58:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:46,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:46,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:46,762 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:46,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-10 11:58:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:46,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:58:46,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:46,946 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 11:58:46,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:47,023 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 11:58:47,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959126151] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:47,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:47,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:58:47,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523479153] [2023-11-10 11:58:47,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:47,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:58:47,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:47,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:58:47,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:58:47,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 418 [2023-11-10 11:58:47,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 328 transitions, 760 flow. Second operand has 18 states, 18 states have (on average 324.6666666666667) internal successors, (5844), 18 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:47,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 418 [2023-11-10 11:58:47,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:47,246 INFO L124 PetriNetUnfolderBase]: 0/436 cut-off events. [2023-11-10 11:58:47,246 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2023-11-10 11:58:47,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 636 conditions, 436 events. 0/436 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1113 event pairs, 0 based on Foata normal form. 4/440 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:58:47,247 INFO L140 encePairwiseOnDemand]: 412/418 looper letters, 29 selfloop transitions, 21 changer transitions 0/352 dead transitions. [2023-11-10 11:58:47,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 352 transitions, 968 flow [2023-11-10 11:58:47,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:58:47,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:58:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 6816 transitions. [2023-11-10 11:58:47,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7764866712235133 [2023-11-10 11:58:47,251 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 6816 transitions. [2023-11-10 11:58:47,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 6816 transitions. [2023-11-10 11:58:47,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:47,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 6816 transitions. [2023-11-10 11:58:47,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 324.57142857142856) internal successors, (6816), 21 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 418.0) internal successors, (9196), 22 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,262 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 418.0) internal successors, (9196), 22 states have internal predecessors, (9196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,262 INFO L175 Difference]: Start difference. First operand has 355 places, 328 transitions, 760 flow. Second operand 21 states and 6816 transitions. [2023-11-10 11:58:47,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 352 transitions, 968 flow [2023-11-10 11:58:47,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 352 transitions, 954 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:58:47,269 INFO L231 Difference]: Finished difference. Result has 379 places, 341 transitions, 884 flow [2023-11-10 11:58:47,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=884, PETRI_PLACES=379, PETRI_TRANSITIONS=341} [2023-11-10 11:58:47,273 INFO L281 CegarLoopForPetriNet]: 364 programPoint places, 15 predicate places. [2023-11-10 11:58:47,273 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 341 transitions, 884 flow [2023-11-10 11:58:47,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 324.6666666666667) internal successors, (5844), 18 states have internal predecessors, (5844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:47,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:47,274 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:47,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:47,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:47,479 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:47,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:47,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1405645870, now seen corresponding path program 1 times [2023-11-10 11:58:47,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:47,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366403564] [2023-11-10 11:58:47,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:47,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:47,635 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:47,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:58:47,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366403564] [2023-11-10 11:58:47,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366403564] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:58:47,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255514893] [2023-11-10 11:58:47,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:47,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:58:47,637 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:58:47,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-10 11:58:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:58:47,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:58:47,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:58:47,874 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:47,875 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:58:48,107 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:58:48,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255514893] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:58:48,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:58:48,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:58:48,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032064855] [2023-11-10 11:58:48,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:58:48,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:58:48,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:58:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:58:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:58:48,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 322 out of 418 [2023-11-10 11:58:48,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 341 transitions, 884 flow. Second operand has 34 states, 34 states have (on average 324.8235294117647) internal successors, (11044), 34 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:58:48,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 322 of 418 [2023-11-10 11:58:48,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:58:48,423 INFO L124 PetriNetUnfolderBase]: 0/396 cut-off events. [2023-11-10 11:58:48,424 INFO L125 PetriNetUnfolderBase]: For 186/186 co-relation queries the response was YES. [2023-11-10 11:58:48,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 622 conditions, 396 events. 0/396 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 875 event pairs, 0 based on Foata normal form. 4/400 useless extension candidates. Maximal degree in co-relation 0. Up to 17 conditions per place. [2023-11-10 11:58:48,424 INFO L140 encePairwiseOnDemand]: 413/418 looper letters, 33 selfloop transitions, 31 changer transitions 0/358 dead transitions. [2023-11-10 11:58:48,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 358 transitions, 1126 flow [2023-11-10 11:58:48,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-10 11:58:48,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-11-10 11:58:48,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 10694 transitions. [2023-11-10 11:58:48,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.775264607800493 [2023-11-10 11:58:48,430 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 10694 transitions. [2023-11-10 11:58:48,430 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 10694 transitions. [2023-11-10 11:58:48,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:58:48,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 10694 transitions. [2023-11-10 11:58:48,437 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 324.06060606060606) internal successors, (10694), 33 states have internal predecessors, (10694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 418.0) internal successors, (14212), 34 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,445 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 418.0) internal successors, (14212), 34 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,445 INFO L175 Difference]: Start difference. First operand has 379 places, 341 transitions, 884 flow. Second operand 33 states and 10694 transitions. [2023-11-10 11:58:48,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 358 transitions, 1126 flow [2023-11-10 11:58:48,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 358 transitions, 1060 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-11-10 11:58:48,451 INFO L231 Difference]: Finished difference. Result has 388 places, 340 transitions, 921 flow [2023-11-10 11:58:48,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=418, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=921, PETRI_PLACES=388, PETRI_TRANSITIONS=340} [2023-11-10 11:58:48,452 INFO L281 CegarLoopForPetriNet]: 364 programPoint places, 24 predicate places. [2023-11-10 11:58:48,452 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 340 transitions, 921 flow [2023-11-10 11:58:48,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 324.8235294117647) internal successors, (11044), 34 states have internal predecessors, (11044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:58:48,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:58:48,453 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:58:48,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-10 11:58:48,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:58:48,658 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:58:48,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:58:48,718 INFO L85 PathProgramCache]: Analyzing trace with hash -868215161, now seen corresponding path program 1 times [2023-11-10 11:58:48,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:58:48,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608046643] [2023-11-10 11:58:48,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:58:48,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:58:48,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:48,752 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:58:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:58:48,784 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:58:48,784 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:58:48,784 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:58:48,784 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:58:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2023-11-10 11:58:48,785 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:58:48,785 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:58:48,785 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-11-10 11:58:48,814 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-11-10 11:58:48,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 393 places, 452 transitions, 1091 flow [2023-11-10 11:58:58,605 INFO L124 PetriNetUnfolderBase]: 11390/42742 cut-off events. [2023-11-10 11:58:58,605 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-11-10 11:59:00,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54095 conditions, 42742 events. 11390/42742 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 513882 event pairs, 7181 based on Foata normal form. 0/38508 useless extension candidates. Maximal degree in co-relation 26358. Up to 11264 conditions per place. [2023-11-10 11:59:00,146 INFO L82 GeneralOperation]: Start removeDead. Operand has 393 places, 452 transitions, 1091 flow [2023-11-10 11:59:00,743 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 393 places, 452 transitions, 1091 flow [2023-11-10 11:59:00,744 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:59:00,744 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;@b1a286, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:59:00,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:59:00,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:59:00,747 INFO L124 PetriNetUnfolderBase]: 2/67 cut-off events. [2023-11-10 11:59:00,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:59:00,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:00,747 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] [2023-11-10 11:59:00,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:00,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:00,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1925673467, now seen corresponding path program 1 times [2023-11-10 11:59:00,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:00,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466350729] [2023-11-10 11:59:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:00,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:00,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:00,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:00,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:00,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466350729] [2023-11-10 11:59:00,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466350729] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:59:00,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:59:00,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:59:00,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424949754] [2023-11-10 11:59:00,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:59:00,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:59:00,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:00,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:59:00,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:59:00,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 349 out of 452 [2023-11-10 11:59:00,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 452 transitions, 1091 flow. Second operand has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:00,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:00,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 349 of 452 [2023-11-10 11:59:00,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:11,832 INFO L124 PetriNetUnfolderBase]: 9227/40551 cut-off events. [2023-11-10 11:59:11,832 INFO L125 PetriNetUnfolderBase]: For 34067/34267 co-relation queries the response was YES. [2023-11-10 11:59:13,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65298 conditions, 40551 events. 9227/40551 cut-off events. For 34067/34267 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 497699 event pairs, 7181 based on Foata normal form. 139477/177958 useless extension candidates. Maximal degree in co-relation 31424. Up to 13389 conditions per place. [2023-11-10 11:59:13,142 INFO L140 encePairwiseOnDemand]: 378/452 looper letters, 21 selfloop transitions, 2 changer transitions 32/384 dead transitions. [2023-11-10 11:59:13,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 384 transitions, 1025 flow [2023-11-10 11:59:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:59:13,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:59:13,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1161 transitions. [2023-11-10 11:59:13,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8561946902654868 [2023-11-10 11:59:13,143 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1161 transitions. [2023-11-10 11:59:13,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1161 transitions. [2023-11-10 11:59:13,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:13,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1161 transitions. [2023-11-10 11:59:13,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 387.0) internal successors, (1161), 3 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,145 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 452.0) internal successors, (1808), 4 states have internal predecessors, (1808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,145 INFO L175 Difference]: Start difference. First operand has 393 places, 452 transitions, 1091 flow. Second operand 3 states and 1161 transitions. [2023-11-10 11:59:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 384 transitions, 1025 flow [2023-11-10 11:59:13,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 384 transitions, 1025 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:59:13,155 INFO L231 Difference]: Finished difference. Result has 395 places, 349 transitions, 862 flow [2023-11-10 11:59:13,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=862, PETRI_PLACES=395, PETRI_TRANSITIONS=349} [2023-11-10 11:59:13,155 INFO L281 CegarLoopForPetriNet]: 393 programPoint places, 2 predicate places. [2023-11-10 11:59:13,155 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 349 transitions, 862 flow [2023-11-10 11:59:13,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 350.3333333333333) internal successors, (1051), 3 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:13,156 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] [2023-11-10 11:59:13,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2023-11-10 11:59:13,156 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:13,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:13,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1150830667, now seen corresponding path program 1 times [2023-11-10 11:59:13,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:13,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524543131] [2023-11-10 11:59:13,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:13,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:13,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524543131] [2023-11-10 11:59:13,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524543131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:13,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361054285] [2023-11-10 11:59:13,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:13,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:13,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:13,187 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:13,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-10 11:59:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:13,338 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:59:13,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:13,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:13,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:13,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:13,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361054285] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:13,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:13,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:59:13,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320645176] [2023-11-10 11:59:13,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:13,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:59:13,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:59:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:59:13,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 452 [2023-11-10 11:59:13,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 349 transitions, 862 flow. Second operand has 10 states, 10 states have (on average 350.4) internal successors, (3504), 10 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:13,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 452 [2023-11-10 11:59:13,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:13,521 INFO L124 PetriNetUnfolderBase]: 0/522 cut-off events. [2023-11-10 11:59:13,521 INFO L125 PetriNetUnfolderBase]: For 278/278 co-relation queries the response was YES. [2023-11-10 11:59:13,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 522 events. 0/522 cut-off events. For 278/278 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1526 event pairs, 0 based on Foata normal form. 2/524 useless extension candidates. Maximal degree in co-relation 0. Up to 39 conditions per place. [2023-11-10 11:59:13,522 INFO L140 encePairwiseOnDemand]: 446/452 looper letters, 22 selfloop transitions, 9 changer transitions 0/359 dead transitions. [2023-11-10 11:59:13,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 359 transitions, 946 flow [2023-11-10 11:59:13,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:59:13,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:59:13,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3165 transitions. [2023-11-10 11:59:13,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.778023598820059 [2023-11-10 11:59:13,524 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3165 transitions. [2023-11-10 11:59:13,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3165 transitions. [2023-11-10 11:59:13,524 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:13,524 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3165 transitions. [2023-11-10 11:59:13,526 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 351.6666666666667) internal successors, (3165), 9 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 452.0) internal successors, (4520), 10 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,528 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 452.0) internal successors, (4520), 10 states have internal predecessors, (4520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,528 INFO L175 Difference]: Start difference. First operand has 395 places, 349 transitions, 862 flow. Second operand 9 states and 3165 transitions. [2023-11-10 11:59:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 359 transitions, 946 flow [2023-11-10 11:59:13,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 359 transitions, 854 flow, removed 45 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:13,533 INFO L231 Difference]: Finished difference. Result has 384 places, 355 transitions, 820 flow [2023-11-10 11:59:13,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=770, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=820, PETRI_PLACES=384, PETRI_TRANSITIONS=355} [2023-11-10 11:59:13,534 INFO L281 CegarLoopForPetriNet]: 393 programPoint places, -9 predicate places. [2023-11-10 11:59:13,534 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 355 transitions, 820 flow [2023-11-10 11:59:13,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 350.4) internal successors, (3504), 10 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:13,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:13,534 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] [2023-11-10 11:59:13,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:13,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-11-10 11:59:13,739 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:13,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:13,739 INFO L85 PathProgramCache]: Analyzing trace with hash 589371336, now seen corresponding path program 1 times [2023-11-10 11:59:13,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:13,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374192316] [2023-11-10 11:59:13,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:13,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:13,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:13,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:13,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374192316] [2023-11-10 11:59:13,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374192316] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:13,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875373327] [2023-11-10 11:59:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:13,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:13,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:13,799 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:13,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-10 11:59:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:13,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-10 11:59:13,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:13,980 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:13,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:14,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875373327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:14,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:14,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-10 11:59:14,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177356841] [2023-11-10 11:59:14,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:14,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-10 11:59:14,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:14,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-10 11:59:14,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-10 11:59:14,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 452 [2023-11-10 11:59:14,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 355 transitions, 820 flow. Second operand has 18 states, 18 states have (on average 350.6666666666667) internal successors, (6312), 18 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:14,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:14,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 452 [2023-11-10 11:59:14,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:14,418 INFO L124 PetriNetUnfolderBase]: 0/482 cut-off events. [2023-11-10 11:59:14,418 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-11-10 11:59:14,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 704 conditions, 482 events. 0/482 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 1274 event pairs, 0 based on Foata normal form. 4/486 useless extension candidates. Maximal degree in co-relation 0. Up to 23 conditions per place. [2023-11-10 11:59:14,419 INFO L140 encePairwiseOnDemand]: 446/452 looper letters, 30 selfloop transitions, 21 changer transitions 0/379 dead transitions. [2023-11-10 11:59:14,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 379 transitions, 1030 flow [2023-11-10 11:59:14,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-10 11:59:14,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-10 11:59:14,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 7363 transitions. [2023-11-10 11:59:14,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7757058575642647 [2023-11-10 11:59:14,423 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 7363 transitions. [2023-11-10 11:59:14,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 7363 transitions. [2023-11-10 11:59:14,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:14,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 7363 transitions. [2023-11-10 11:59:14,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 350.6190476190476) internal successors, (7363), 21 states have internal predecessors, (7363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:14,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 452.0) internal successors, (9944), 22 states have internal predecessors, (9944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:14,432 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 452.0) internal successors, (9944), 22 states have internal predecessors, (9944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:14,432 INFO L175 Difference]: Start difference. First operand has 384 places, 355 transitions, 820 flow. Second operand 21 states and 7363 transitions. [2023-11-10 11:59:14,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 379 transitions, 1030 flow [2023-11-10 11:59:14,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 379 transitions, 1016 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:59:14,437 INFO L231 Difference]: Finished difference. Result has 408 places, 368 transitions, 944 flow [2023-11-10 11:59:14,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=944, PETRI_PLACES=408, PETRI_TRANSITIONS=368} [2023-11-10 11:59:14,438 INFO L281 CegarLoopForPetriNet]: 393 programPoint places, 15 predicate places. [2023-11-10 11:59:14,438 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 368 transitions, 944 flow [2023-11-10 11:59:14,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 350.6666666666667) internal successors, (6312), 18 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:14,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:14,439 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:14,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-10 11:59:14,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:14,642 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:14,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:14,643 INFO L85 PathProgramCache]: Analyzing trace with hash 259614006, now seen corresponding path program 1 times [2023-11-10 11:59:14,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:14,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506486528] [2023-11-10 11:59:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:14,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:14,831 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:14,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:59:14,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506486528] [2023-11-10 11:59:14,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506486528] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:59:14,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191153089] [2023-11-10 11:59:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:14,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:14,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:59:14,833 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:59:14,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-10 11:59:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:59:15,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-10 11:59:15,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:59:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:15,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:59:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:59:15,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191153089] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:59:15,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:59:15,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2023-11-10 11:59:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842924536] [2023-11-10 11:59:15,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:59:15,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-10 11:59:15,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:59:15,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-10 11:59:15,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2023-11-10 11:59:15,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 452 [2023-11-10 11:59:15,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 368 transitions, 944 flow. Second operand has 34 states, 34 states have (on average 350.8235294117647) internal successors, (11928), 34 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:15,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:59:15,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 452 [2023-11-10 11:59:15,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:59:15,665 INFO L124 PetriNetUnfolderBase]: 0/432 cut-off events. [2023-11-10 11:59:15,666 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2023-11-10 11:59:15,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 680 conditions, 432 events. 0/432 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 973 event pairs, 0 based on Foata normal form. 5/437 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:59:15,667 INFO L140 encePairwiseOnDemand]: 447/452 looper letters, 36 selfloop transitions, 34 changer transitions 0/390 dead transitions. [2023-11-10 11:59:15,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 390 transitions, 1232 flow [2023-11-10 11:59:15,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-10 11:59:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-10 11:59:15,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 12603 transitions. [2023-11-10 11:59:15,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7745206489675516 [2023-11-10 11:59:15,674 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 12603 transitions. [2023-11-10 11:59:15,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 12603 transitions. [2023-11-10 11:59:15,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:59:15,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 12603 transitions. [2023-11-10 11:59:15,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 350.0833333333333) internal successors, (12603), 36 states have internal predecessors, (12603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:15,692 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 452.0) internal successors, (16724), 37 states have internal predecessors, (16724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:15,694 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 452.0) internal successors, (16724), 37 states have internal predecessors, (16724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:15,694 INFO L175 Difference]: Start difference. First operand has 408 places, 368 transitions, 944 flow. Second operand 36 states and 12603 transitions. [2023-11-10 11:59:15,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 390 transitions, 1232 flow [2023-11-10 11:59:15,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 390 transitions, 1160 flow, removed 10 selfloop flow, removed 13 redundant places. [2023-11-10 11:59:15,700 INFO L231 Difference]: Finished difference. Result has 420 places, 370 transitions, 1005 flow [2023-11-10 11:59:15,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=452, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=1005, PETRI_PLACES=420, PETRI_TRANSITIONS=370} [2023-11-10 11:59:15,701 INFO L281 CegarLoopForPetriNet]: 393 programPoint places, 27 predicate places. [2023-11-10 11:59:15,701 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 370 transitions, 1005 flow [2023-11-10 11:59:15,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 350.8235294117647) internal successors, (11928), 34 states have internal predecessors, (11928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:59:15,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:59:15,702 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:59:15,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-10 11:59:15,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:59:15,908 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:59:15,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:59:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -372877087, now seen corresponding path program 1 times [2023-11-10 11:59:15,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:59:15,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586998980] [2023-11-10 11:59:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:59:15,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:59:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:15,929 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:59:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:59:15,963 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:59:15,963 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:59:15,963 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:59:15,963 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:59:15,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2023-11-10 11:59:15,964 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:59:15,965 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:59:15,965 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-11-10 11:59:15,993 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-11-10 11:59:15,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 422 places, 486 transitions, 1188 flow