/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_05-lockfuns_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.fix-rcfgbuilder-lbe-0ccecc1-m [2023-11-10 11:55:13,334 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-10 11:55:13,384 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 11:55:13,403 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-10 11:55:13,404 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-10 11:55:13,404 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-10 11:55:13,405 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-10 11:55:13,405 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-10 11:55:13,405 INFO L153 SettingsManager]: * Use SBE=true [2023-11-10 11:55:13,406 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-10 11:55:13,406 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-10 11:55:13,406 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-10 11:55:13,407 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-10 11:55:13,407 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-10 11:55:13,407 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-10 11:55:13,408 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-10 11:55:13,408 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-10 11:55:13,408 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-10 11:55:13,409 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-10 11:55:13,409 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-10 11:55:13,409 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-10 11:55:13,410 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-10 11:55:13,410 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-10 11:55:13,410 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-10 11:55:13,411 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-10 11:55:13,411 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:55:13,411 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-10 11:55:13,411 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-10 11:55:13,412 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-10 11:55:13,412 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-10 11:55:13,412 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-10 11:55:13,413 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-10 11:55:13,413 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-10 11:55:13,413 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-10 11:55:13,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-10 11:55:13,614 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-10 11:55:13,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-10 11:55:13,618 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-10 11:55:13,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-10 11:55:13,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-11-10 11:55:14,704 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-10 11:55:14,948 INFO L384 CDTParser]: Found 1 translation units. [2023-11-10 11:55:14,948 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2023-11-10 11:55:14,965 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914ebb285/c9a3467bc9d5499b88d9ef18c271abec/FLAG8e09deb3e [2023-11-10 11:55:14,977 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/914ebb285/c9a3467bc9d5499b88d9ef18c271abec [2023-11-10 11:55:14,978 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-10 11:55:14,980 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-10 11:55:14,981 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-10 11:55:14,981 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-10 11:55:14,987 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-10 11:55:14,988 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:55:14" (1/1) ... [2023-11-10 11:55:14,988 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c7f46d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:14, skipping insertion in model container [2023-11-10 11:55:14,989 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 11:55:14" (1/1) ... [2023-11-10 11:55:15,028 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-10 11:55:15,276 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_05-lockfuns_racefree.i[30176,30189] [2023-11-10 11:55:15,298 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:55:15,311 INFO L202 MainTranslator]: Completed pre-run [2023-11-10 11:55:15,348 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_05-lockfuns_racefree.i[30176,30189] [2023-11-10 11:55:15,371 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-10 11:55:15,410 INFO L206 MainTranslator]: Completed translation [2023-11-10 11:55:15,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15 WrapperNode [2023-11-10 11:55:15,412 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-10 11:55:15,413 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-10 11:55:15,414 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-10 11:55:15,414 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-10 11:55:15,419 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,445 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,475 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 107 [2023-11-10 11:55:15,476 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-10 11:55:15,477 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-10 11:55:15,477 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-10 11:55:15,477 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-10 11:55:15,485 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,485 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,491 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,492 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,506 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,509 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,510 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,511 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,513 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-10 11:55:15,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-10 11:55:15,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-10 11:55:15,514 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-10 11:55:15,514 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (1/1) ... [2023-11-10 11:55:15,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-10 11:55:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:55:15,548 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 11:55:15,567 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 11:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-10 11:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-10 11:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-10 11:55:15,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-10 11:55:15,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-10 11:55:15,590 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-10 11:55:15,590 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-10 11:55:15,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-10 11:55:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-10 11:55:15,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-10 11:55:15,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-10 11:55:15,592 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 11:55:15,699 INFO L236 CfgBuilder]: Building ICFG [2023-11-10 11:55:15,701 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-10 11:55:15,905 INFO L277 CfgBuilder]: Performing block encoding [2023-11-10 11:55:15,913 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-10 11:55:15,913 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-10 11:55:15,917 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:55:15 BoogieIcfgContainer [2023-11-10 11:55:15,917 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-10 11:55:15,920 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-10 11:55:15,922 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-10 11:55:15,924 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-10 11:55:15,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 11:55:14" (1/3) ... [2023-11-10 11:55:15,925 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1205275e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:55:15, skipping insertion in model container [2023-11-10 11:55:15,925 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 11:55:15" (2/3) ... [2023-11-10 11:55:15,926 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1205275e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 11:55:15, skipping insertion in model container [2023-11-10 11:55:15,926 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.11 11:55:15" (3/3) ... [2023-11-10 11:55:15,927 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2023-11-10 11:55:15,941 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-10 11:55:15,942 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-10 11:55:15,942 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-10 11:55:15,995 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-10 11:55:16,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 98 places, 107 transitions, 221 flow [2023-11-10 11:55:16,101 INFO L124 PetriNetUnfolderBase]: 17/147 cut-off events. [2023-11-10 11:55:16,101 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-10 11:55:16,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 147 events. 17/147 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 358 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 75. Up to 4 conditions per place. [2023-11-10 11:55:16,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 98 places, 107 transitions, 221 flow [2023-11-10 11:55:16,111 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 94 places, 102 transitions, 208 flow [2023-11-10 11:55:16,119 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:55:16,124 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;@105f11dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:55:16,124 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:55:16,140 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:55:16,140 INFO L124 PetriNetUnfolderBase]: 3/74 cut-off events. [2023-11-10 11:55:16,140 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:16,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:16,141 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] [2023-11-10 11:55:16,141 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:16,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:16,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1726605702, now seen corresponding path program 1 times [2023-11-10 11:55:16,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:16,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485794509] [2023-11-10 11:55:16,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:16,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:16,453 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 11:55:16,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:16,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485794509] [2023-11-10 11:55:16,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485794509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:16,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:16,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:55:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605345801] [2023-11-10 11:55:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:16,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:55:16,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:16,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:55:16,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:55:16,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 107 [2023-11-10 11:55:16,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:16,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 107 [2023-11-10 11:55:16,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:16,533 INFO L124 PetriNetUnfolderBase]: 0/94 cut-off events. [2023-11-10 11:55:16,533 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:16,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111 conditions, 94 events. 0/94 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 76 event pairs, 0 based on Foata normal form. 30/121 useless extension candidates. Maximal degree in co-relation 0. Up to 8 conditions per place. [2023-11-10 11:55:16,535 INFO L140 encePairwiseOnDemand]: 93/107 looper letters, 9 selfloop transitions, 2 changer transitions 17/92 dead transitions. [2023-11-10 11:55:16,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 92 transitions, 212 flow [2023-11-10 11:55:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:55:16,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:55:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 283 transitions. [2023-11-10 11:55:16,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.881619937694704 [2023-11-10 11:55:16,547 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 283 transitions. [2023-11-10 11:55:16,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 283 transitions. [2023-11-10 11:55:16,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:16,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 283 transitions. [2023-11-10 11:55:16,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,557 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 107.0) internal successors, (428), 4 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,558 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 208 flow. Second operand 3 states and 283 transitions. [2023-11-10 11:55:16,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 92 transitions, 212 flow [2023-11-10 11:55:16,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 92 transitions, 212 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:55:16,566 INFO L231 Difference]: Finished difference. Result has 96 places, 73 transitions, 158 flow [2023-11-10 11:55:16,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=107, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=96, PETRI_TRANSITIONS=73} [2023-11-10 11:55:16,571 INFO L281 CegarLoopForPetriNet]: 94 programPoint places, 2 predicate places. [2023-11-10 11:55:16,571 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 73 transitions, 158 flow [2023-11-10 11:55:16,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:16,572 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] [2023-11-10 11:55:16,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-10 11:55:16,573 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:16,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:16,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1863638133, now seen corresponding path program 1 times [2023-11-10 11:55:16,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:16,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786097194] [2023-11-10 11:55:16,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:16,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:16,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:16,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:55:16,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:16,657 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:55:16,657 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:55:16,659 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:55:16,660 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:55:16,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-10 11:55:16,661 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-10 11:55:16,667 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:55:16,667 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-10 11:55:16,691 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-10 11:55:16,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 139 transitions, 294 flow [2023-11-10 11:55:16,733 INFO L124 PetriNetUnfolderBase]: 31/245 cut-off events. [2023-11-10 11:55:16,733 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-10 11:55:16,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 245 events. 31/245 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 744 event pairs, 0 based on Foata normal form. 0/207 useless extension candidates. Maximal degree in co-relation 149. Up to 8 conditions per place. [2023-11-10 11:55:16,735 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 139 transitions, 294 flow [2023-11-10 11:55:16,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 139 transitions, 294 flow [2023-11-10 11:55:16,739 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:55:16,740 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;@105f11dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:55:16,740 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:55:16,750 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:55:16,750 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-11-10 11:55:16,750 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:16,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:16,750 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] [2023-11-10 11:55:16,750 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:16,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash -131917670, now seen corresponding path program 1 times [2023-11-10 11:55:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:16,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884955017] [2023-11-10 11:55:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:16,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:16,851 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 11:55:16,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:16,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884955017] [2023-11-10 11:55:16,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884955017] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:16,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:16,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:55:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823206170] [2023-11-10 11:55:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:16,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:55:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:55:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:55:16,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 139 [2023-11-10 11:55:16,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 139 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:16,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 139 [2023-11-10 11:55:16,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:16,939 INFO L124 PetriNetUnfolderBase]: 2/194 cut-off events. [2023-11-10 11:55:16,939 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-11-10 11:55:16,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 233 conditions, 194 events. 2/194 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 447 event pairs, 0 based on Foata normal form. 101/287 useless extension candidates. Maximal degree in co-relation 129. Up to 22 conditions per place. [2023-11-10 11:55:16,942 INFO L140 encePairwiseOnDemand]: 119/139 looper letters, 12 selfloop transitions, 2 changer transitions 23/125 dead transitions. [2023-11-10 11:55:16,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 125 transitions, 300 flow [2023-11-10 11:55:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:55:16,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:55:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-11-10 11:55:16,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8776978417266187 [2023-11-10 11:55:16,948 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-11-10 11:55:16,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-11-10 11:55:16,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:16,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-11-10 11:55:16,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,952 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 139.0) internal successors, (556), 4 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,952 INFO L175 Difference]: Start difference. First operand has 125 places, 139 transitions, 294 flow. Second operand 3 states and 366 transitions. [2023-11-10 11:55:16,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 125 transitions, 300 flow [2023-11-10 11:55:16,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 125 transitions, 300 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:55:16,956 INFO L231 Difference]: Finished difference. Result has 127 places, 99 transitions, 218 flow [2023-11-10 11:55:16,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=127, PETRI_TRANSITIONS=99} [2023-11-10 11:55:16,957 INFO L281 CegarLoopForPetriNet]: 125 programPoint places, 2 predicate places. [2023-11-10 11:55:16,957 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 99 transitions, 218 flow [2023-11-10 11:55:16,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:16,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:16,958 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] [2023-11-10 11:55:16,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-10 11:55:16,958 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:16,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:16,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1635471272, now seen corresponding path program 1 times [2023-11-10 11:55:16,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:16,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282567081] [2023-11-10 11:55:16,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:16,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:17,103 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 11:55:17,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282567081] [2023-11-10 11:55:17,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282567081] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:55:17,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745672526] [2023-11-10 11:55:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:17,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:55:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:55:17,109 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 11:55:17,110 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 11:55:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:17,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:55:17,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:55:17,277 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 11:55:17,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:55:17,336 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 11:55:17,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745672526] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:55:17,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:55:17,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:55:17,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809619376] [2023-11-10 11:55:17,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:55:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:55:17,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:55:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:55:17,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 139 [2023-11-10 11:55:17,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 99 transitions, 218 flow. Second operand has 10 states, 10 states have (on average 109.4) internal successors, (1094), 10 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:17,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 139 [2023-11-10 11:55:17,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:17,422 INFO L124 PetriNetUnfolderBase]: 0/98 cut-off events. [2023-11-10 11:55:17,422 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-11-10 11:55:17,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129 conditions, 98 events. 0/98 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 87 event pairs, 0 based on Foata normal form. 2/100 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-11-10 11:55:17,423 INFO L140 encePairwiseOnDemand]: 134/139 looper letters, 9 selfloop transitions, 7 changer transitions 0/92 dead transitions. [2023-11-10 11:55:17,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 92 transitions, 234 flow [2023-11-10 11:55:17,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:55:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:55:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 981 transitions. [2023-11-10 11:55:17,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7841726618705036 [2023-11-10 11:55:17,426 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 981 transitions. [2023-11-10 11:55:17,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 981 transitions. [2023-11-10 11:55:17,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:17,428 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 981 transitions. [2023-11-10 11:55:17,432 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 109.0) internal successors, (981), 9 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,437 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 139.0) internal successors, (1390), 10 states have internal predecessors, (1390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,437 INFO L175 Difference]: Start difference. First operand has 127 places, 99 transitions, 218 flow. Second operand 9 states and 981 transitions. [2023-11-10 11:55:17,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 92 transitions, 234 flow [2023-11-10 11:55:17,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 92 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-10 11:55:17,442 INFO L231 Difference]: Finished difference. Result has 100 places, 88 transitions, 206 flow [2023-11-10 11:55:17,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=139, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=206, PETRI_PLACES=100, PETRI_TRANSITIONS=88} [2023-11-10 11:55:17,445 INFO L281 CegarLoopForPetriNet]: 125 programPoint places, -25 predicate places. [2023-11-10 11:55:17,445 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 88 transitions, 206 flow [2023-11-10 11:55:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.4) internal successors, (1094), 10 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:17,446 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] [2023-11-10 11:55:17,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-10 11:55:17,651 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 11:55:17,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:17,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1161676544, now seen corresponding path program 1 times [2023-11-10 11:55:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:17,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771277728] [2023-11-10 11:55:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:17,679 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:55:17,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:17,706 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:55:17,706 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:55:17,707 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:55:17,707 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:55:17,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-10 11:55:17,707 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:55:17,708 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:55:17,708 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-10 11:55:17,728 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-10 11:55:17,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 152 places, 171 transitions, 369 flow [2023-11-10 11:55:17,768 INFO L124 PetriNetUnfolderBase]: 50/378 cut-off events. [2023-11-10 11:55:17,768 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:55:17,773 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 13. Compared 1282 event pairs, 1 based on Foata normal form. 0/320 useless extension candidates. Maximal degree in co-relation 253. Up to 16 conditions per place. [2023-11-10 11:55:17,773 INFO L82 GeneralOperation]: Start removeDead. Operand has 152 places, 171 transitions, 369 flow [2023-11-10 11:55:17,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 152 places, 171 transitions, 369 flow [2023-11-10 11:55:17,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:55:17,779 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;@105f11dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:55:17,779 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:55:17,785 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:55:17,786 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-11-10 11:55:17,786 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:17,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:17,786 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] [2023-11-10 11:55:17,786 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:17,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:17,787 INFO L85 PathProgramCache]: Analyzing trace with hash 192243386, now seen corresponding path program 1 times [2023-11-10 11:55:17,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:17,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91136983] [2023-11-10 11:55:17,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:17,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:17,858 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 11:55:17,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:17,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91136983] [2023-11-10 11:55:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91136983] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:17,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:17,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:55:17,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354320015] [2023-11-10 11:55:17,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:17,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:55:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:17,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:55:17,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:55:17,869 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 171 [2023-11-10 11:55:17,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 171 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:17,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 171 [2023-11-10 11:55:17,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:17,943 INFO L124 PetriNetUnfolderBase]: 7/312 cut-off events. [2023-11-10 11:55:17,943 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-11-10 11:55:17,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 312 events. 7/312 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 957 event pairs, 1 based on Foata normal form. 278/576 useless extension candidates. Maximal degree in co-relation 233. Up to 41 conditions per place. [2023-11-10 11:55:17,945 INFO L140 encePairwiseOnDemand]: 145/171 looper letters, 13 selfloop transitions, 2 changer transitions 24/151 dead transitions. [2023-11-10 11:55:17,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 151 transitions, 367 flow [2023-11-10 11:55:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:55:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:55:17,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-11-10 11:55:17,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8693957115009746 [2023-11-10 11:55:17,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-11-10 11:55:17,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-11-10 11:55:17,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:17,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-11-10 11:55:17,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,950 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 171.0) internal successors, (684), 4 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,950 INFO L175 Difference]: Start difference. First operand has 152 places, 171 transitions, 369 flow. Second operand 3 states and 446 transitions. [2023-11-10 11:55:17,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 151 transitions, 367 flow [2023-11-10 11:55:17,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 151 transitions, 367 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:55:17,955 INFO L231 Difference]: Finished difference. Result has 154 places, 124 transitions, 276 flow [2023-11-10 11:55:17,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=154, PETRI_TRANSITIONS=124} [2023-11-10 11:55:17,957 INFO L281 CegarLoopForPetriNet]: 152 programPoint places, 2 predicate places. [2023-11-10 11:55:17,957 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 124 transitions, 276 flow [2023-11-10 11:55:17,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:17,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:17,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:55:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-10 11:55:17,959 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:17,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:17,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2026890566, now seen corresponding path program 1 times [2023-11-10 11:55:17,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339277614] [2023-11-10 11:55:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:17,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:18,053 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 11:55:18,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:18,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339277614] [2023-11-10 11:55:18,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339277614] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:55:18,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876520222] [2023-11-10 11:55:18,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:18,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:55:18,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:55:18,057 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 11:55:18,069 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 11:55:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:18,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:55:18,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:55:18,181 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 11:55:18,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:55:18,223 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 11:55:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876520222] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:55:18,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:55:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:55:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981400903] [2023-11-10 11:55:18,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:55:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:55:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:55:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:55:18,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 171 [2023-11-10 11:55:18,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 124 transitions, 276 flow. Second operand has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:18,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 171 [2023-11-10 11:55:18,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:18,339 INFO L124 PetriNetUnfolderBase]: 0/145 cut-off events. [2023-11-10 11:55:18,340 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-11-10 11:55:18,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191 conditions, 145 events. 0/145 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 227 event pairs, 0 based on Foata normal form. 2/147 useless extension candidates. Maximal degree in co-relation 0. Up to 7 conditions per place. [2023-11-10 11:55:18,340 INFO L140 encePairwiseOnDemand]: 165/171 looper letters, 14 selfloop transitions, 9 changer transitions 0/134 dead transitions. [2023-11-10 11:55:18,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 134 transitions, 344 flow [2023-11-10 11:55:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:55:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:55:18,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1204 transitions. [2023-11-10 11:55:18,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7823261858349577 [2023-11-10 11:55:18,344 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1204 transitions. [2023-11-10 11:55:18,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1204 transitions. [2023-11-10 11:55:18,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:18,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1204 transitions. [2023-11-10 11:55:18,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 133.77777777777777) internal successors, (1204), 9 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,352 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 171.0) internal successors, (1710), 10 states have internal predecessors, (1710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,352 INFO L175 Difference]: Start difference. First operand has 154 places, 124 transitions, 276 flow. Second operand 9 states and 1204 transitions. [2023-11-10 11:55:18,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 134 transitions, 344 flow [2023-11-10 11:55:18,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 134 transitions, 340 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-10 11:55:18,357 INFO L231 Difference]: Finished difference. Result has 143 places, 130 transitions, 322 flow [2023-11-10 11:55:18,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=171, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=322, PETRI_PLACES=143, PETRI_TRANSITIONS=130} [2023-11-10 11:55:18,360 INFO L281 CegarLoopForPetriNet]: 152 programPoint places, -9 predicate places. [2023-11-10 11:55:18,360 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 130 transitions, 322 flow [2023-11-10 11:55:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 133.4) internal successors, (1334), 10 states have internal predecessors, (1334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:18,361 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] [2023-11-10 11:55:18,369 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 11:55:18,566 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 11:55:18,566 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:18,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:18,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2033738744, now seen corresponding path program 1 times [2023-11-10 11:55:18,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:18,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086298061] [2023-11-10 11:55:18,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:18,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:18,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:55:18,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:18,610 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:55:18,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:55:18,611 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:55:18,611 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:55:18,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-10 11:55:18,611 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-10 11:55:18,612 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:55:18,612 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-10 11:55:18,653 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-10 11:55:18,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 179 places, 203 transitions, 446 flow [2023-11-10 11:55:18,727 INFO L124 PetriNetUnfolderBase]: 81/583 cut-off events. [2023-11-10 11:55:18,728 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-10 11:55:18,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 634 conditions, 583 events. 81/583 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2300 event pairs, 6 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 398. Up to 32 conditions per place. [2023-11-10 11:55:18,739 INFO L82 GeneralOperation]: Start removeDead. Operand has 179 places, 203 transitions, 446 flow [2023-11-10 11:55:18,744 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 203 transitions, 446 flow [2023-11-10 11:55:18,746 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:55:18,746 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;@105f11dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:55:18,746 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:55:18,752 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:55:18,752 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-11-10 11:55:18,752 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:18,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:18,752 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] [2023-11-10 11:55:18,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:18,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:18,753 INFO L85 PathProgramCache]: Analyzing trace with hash -754122534, now seen corresponding path program 1 times [2023-11-10 11:55:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:18,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3080896] [2023-11-10 11:55:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:18,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:18,804 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 11:55:18,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:18,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3080896] [2023-11-10 11:55:18,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3080896] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:18,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:18,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:55:18,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254983274] [2023-11-10 11:55:18,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:18,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:55:18,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:18,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:55:18,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:55:18,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 203 [2023-11-10 11:55:18,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 203 transitions, 446 flow. Second operand has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:18,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 203 [2023-11-10 11:55:18,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:18,950 INFO L124 PetriNetUnfolderBase]: 20/498 cut-off events. [2023-11-10 11:55:18,950 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2023-11-10 11:55:18,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 630 conditions, 498 events. 20/498 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 2000 event pairs, 6 based on Foata normal form. 643/1117 useless extension candidates. Maximal degree in co-relation 383. Up to 76 conditions per place. [2023-11-10 11:55:18,953 INFO L140 encePairwiseOnDemand]: 171/203 looper letters, 14 selfloop transitions, 2 changer transitions 25/177 dead transitions. [2023-11-10 11:55:18,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 177 transitions, 436 flow [2023-11-10 11:55:18,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:55:18,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:55:18,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 526 transitions. [2023-11-10 11:55:18,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8637110016420362 [2023-11-10 11:55:18,955 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 526 transitions. [2023-11-10 11:55:18,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 526 transitions. [2023-11-10 11:55:18,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:18,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 526 transitions. [2023-11-10 11:55:18,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,958 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 203.0) internal successors, (812), 4 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,958 INFO L175 Difference]: Start difference. First operand has 179 places, 203 transitions, 446 flow. Second operand 3 states and 526 transitions. [2023-11-10 11:55:18,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 177 transitions, 436 flow [2023-11-10 11:55:18,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 177 transitions, 436 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:55:18,962 INFO L231 Difference]: Finished difference. Result has 181 places, 149 transitions, 336 flow [2023-11-10 11:55:18,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=336, PETRI_PLACES=181, PETRI_TRANSITIONS=149} [2023-11-10 11:55:18,962 INFO L281 CegarLoopForPetriNet]: 179 programPoint places, 2 predicate places. [2023-11-10 11:55:18,963 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 149 transitions, 336 flow [2023-11-10 11:55:18,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:18,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:18,963 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] [2023-11-10 11:55:18,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-10 11:55:18,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:18,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash 978377444, now seen corresponding path program 1 times [2023-11-10 11:55:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:18,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572112193] [2023-11-10 11:55:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:18,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:19,049 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 11:55:19,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572112193] [2023-11-10 11:55:19,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572112193] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:55:19,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101901455] [2023-11-10 11:55:19,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:19,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:55:19,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:55:19,052 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 11:55:19,054 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 11:55:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:19,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:55:19,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:55:19,188 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 11:55:19,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:55:19,225 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 11:55:19,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101901455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:55:19,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:55:19,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:55:19,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438292327] [2023-11-10 11:55:19,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:55:19,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:55:19,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:19,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:55:19,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:55:19,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 203 [2023-11-10 11:55:19,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 149 transitions, 336 flow. Second operand has 10 states, 10 states have (on average 157.4) internal successors, (1574), 10 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:19,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:19,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 203 [2023-11-10 11:55:19,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:19,312 INFO L124 PetriNetUnfolderBase]: 0/192 cut-off events. [2023-11-10 11:55:19,312 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-10 11:55:19,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 192 events. 0/192 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 395 event pairs, 0 based on Foata normal form. 2/194 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-11-10 11:55:19,313 INFO L140 encePairwiseOnDemand]: 197/203 looper letters, 15 selfloop transitions, 9 changer transitions 0/159 dead transitions. [2023-11-10 11:55:19,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 159 transitions, 406 flow [2023-11-10 11:55:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:55:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:55:19,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1421 transitions. [2023-11-10 11:55:19,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2023-11-10 11:55:19,317 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1421 transitions. [2023-11-10 11:55:19,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1421 transitions. [2023-11-10 11:55:19,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:19,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1421 transitions. [2023-11-10 11:55:19,321 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.88888888888889) internal successors, (1421), 9 states have internal predecessors, (1421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:19,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:19,325 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 203.0) internal successors, (2030), 10 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:19,325 INFO L175 Difference]: Start difference. First operand has 181 places, 149 transitions, 336 flow. Second operand 9 states and 1421 transitions. [2023-11-10 11:55:19,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 159 transitions, 406 flow [2023-11-10 11:55:19,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 159 transitions, 398 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-11-10 11:55:19,330 INFO L231 Difference]: Finished difference. Result has 170 places, 155 transitions, 378 flow [2023-11-10 11:55:19,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=378, PETRI_PLACES=170, PETRI_TRANSITIONS=155} [2023-11-10 11:55:19,331 INFO L281 CegarLoopForPetriNet]: 179 programPoint places, -9 predicate places. [2023-11-10 11:55:19,331 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 155 transitions, 378 flow [2023-11-10 11:55:19,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.4) internal successors, (1574), 10 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:19,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:19,332 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] [2023-11-10 11:55:19,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-10 11:55:19,537 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 11:55:19,537 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:19,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:19,538 INFO L85 PathProgramCache]: Analyzing trace with hash -429110917, now seen corresponding path program 1 times [2023-11-10 11:55:19,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:19,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439967760] [2023-11-10 11:55:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:19,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:19,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-10 11:55:19,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:19,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439967760] [2023-11-10 11:55:19,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439967760] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:19,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:19,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-10 11:55:19,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859983461] [2023-11-10 11:55:19,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:19,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-10 11:55:19,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-10 11:55:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-10 11:55:19,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 203 [2023-11-10 11:55:19,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 155 transitions, 378 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:19,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:19,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 203 [2023-11-10 11:55:19,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:25,186 INFO L124 PetriNetUnfolderBase]: 16742/41717 cut-off events. [2023-11-10 11:55:25,186 INFO L125 PetriNetUnfolderBase]: For 481/481 co-relation queries the response was YES. [2023-11-10 11:55:25,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64906 conditions, 41717 events. 16742/41717 cut-off events. For 481/481 co-relation queries the response was YES. Maximal size of possible extension queue 1785. Compared 504570 event pairs, 9176 based on Foata normal form. 750/41812 useless extension candidates. Maximal degree in co-relation 64798. Up to 14189 conditions per place. [2023-11-10 11:55:25,514 INFO L140 encePairwiseOnDemand]: 195/203 looper letters, 31 selfloop transitions, 5 changer transitions 53/219 dead transitions. [2023-11-10 11:55:25,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 219 transitions, 699 flow [2023-11-10 11:55:25,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-10 11:55:25,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-10 11:55:25,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1078 transitions. [2023-11-10 11:55:25,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7586206896551724 [2023-11-10 11:55:25,517 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1078 transitions. [2023-11-10 11:55:25,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1078 transitions. [2023-11-10 11:55:25,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:25,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1078 transitions. [2023-11-10 11:55:25,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 154.0) internal successors, (1078), 7 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:25,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 203.0) internal successors, (1624), 8 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:25,524 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 203.0) internal successors, (1624), 8 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:25,524 INFO L175 Difference]: Start difference. First operand has 170 places, 155 transitions, 378 flow. Second operand 7 states and 1078 transitions. [2023-11-10 11:55:25,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 219 transitions, 699 flow [2023-11-10 11:55:25,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 219 transitions, 693 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-10 11:55:25,530 INFO L231 Difference]: Finished difference. Result has 180 places, 159 transitions, 429 flow [2023-11-10 11:55:25,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=203, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=429, PETRI_PLACES=180, PETRI_TRANSITIONS=159} [2023-11-10 11:55:25,532 INFO L281 CegarLoopForPetriNet]: 179 programPoint places, 1 predicate places. [2023-11-10 11:55:25,532 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 159 transitions, 429 flow [2023-11-10 11:55:25,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:25,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:25,532 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] [2023-11-10 11:55:25,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-10 11:55:25,533 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:25,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:25,533 INFO L85 PathProgramCache]: Analyzing trace with hash -692091955, now seen corresponding path program 1 times [2023-11-10 11:55:25,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:25,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5824087] [2023-11-10 11:55:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:25,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:25,557 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:55:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:25,588 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:55:25,588 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:55:25,588 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:55:25,588 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:55:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-10 11:55:25,589 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-10 11:55:25,589 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:55:25,589 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-10 11:55:25,620 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-10 11:55:25,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 235 transitions, 525 flow [2023-11-10 11:55:25,756 INFO L124 PetriNetUnfolderBase]: 140/936 cut-off events. [2023-11-10 11:55:25,756 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-10 11:55:25,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1042 conditions, 936 events. 140/936 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4362 event pairs, 23 based on Foata normal form. 0/806 useless extension candidates. Maximal degree in co-relation 628. Up to 80 conditions per place. [2023-11-10 11:55:25,770 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 235 transitions, 525 flow [2023-11-10 11:55:25,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 235 transitions, 525 flow [2023-11-10 11:55:25,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:55:25,778 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;@105f11dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:55:25,778 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:55:25,782 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:55:25,782 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-11-10 11:55:25,782 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:25,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:25,782 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] [2023-11-10 11:55:25,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:25,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:25,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1323951866, now seen corresponding path program 1 times [2023-11-10 11:55:25,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:25,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27045922] [2023-11-10 11:55:25,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:25,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:25,816 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 11:55:25,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:25,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27045922] [2023-11-10 11:55:25,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27045922] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:25,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:25,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:55:25,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041413202] [2023-11-10 11:55:25,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:25,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:55:25,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:25,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:55:25,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:55:25,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 235 [2023-11-10 11:55:25,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 235 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:25,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:25,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 235 [2023-11-10 11:55:25,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:26,068 INFO L124 PetriNetUnfolderBase]: 53/824 cut-off events. [2023-11-10 11:55:26,068 INFO L125 PetriNetUnfolderBase]: For 270/270 co-relation queries the response was YES. [2023-11-10 11:55:26,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1082 conditions, 824 events. 53/824 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3974 event pairs, 23 based on Foata normal form. 1392/2174 useless extension candidates. Maximal degree in co-relation 630. Up to 147 conditions per place. [2023-11-10 11:55:26,074 INFO L140 encePairwiseOnDemand]: 197/235 looper letters, 15 selfloop transitions, 2 changer transitions 26/203 dead transitions. [2023-11-10 11:55:26,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 203 transitions, 507 flow [2023-11-10 11:55:26,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:55:26,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:55:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2023-11-10 11:55:26,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8595744680851064 [2023-11-10 11:55:26,076 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2023-11-10 11:55:26,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2023-11-10 11:55:26,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:26,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2023-11-10 11:55:26,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,081 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 235.0) internal successors, (940), 4 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,081 INFO L175 Difference]: Start difference. First operand has 206 places, 235 transitions, 525 flow. Second operand 3 states and 606 transitions. [2023-11-10 11:55:26,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 203 transitions, 507 flow [2023-11-10 11:55:26,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 203 transitions, 507 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:55:26,085 INFO L231 Difference]: Finished difference. Result has 208 places, 174 transitions, 398 flow [2023-11-10 11:55:26,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=208, PETRI_TRANSITIONS=174} [2023-11-10 11:55:26,086 INFO L281 CegarLoopForPetriNet]: 206 programPoint places, 2 predicate places. [2023-11-10 11:55:26,087 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 174 transitions, 398 flow [2023-11-10 11:55:26,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 181.33333333333334) internal successors, (544), 3 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:26,087 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] [2023-11-10 11:55:26,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-10 11:55:26,087 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:26,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:26,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1510068094, now seen corresponding path program 1 times [2023-11-10 11:55:26,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:26,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063178773] [2023-11-10 11:55:26,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:26,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:26,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:26,157 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 11:55:26,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:26,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063178773] [2023-11-10 11:55:26,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063178773] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:55:26,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110703980] [2023-11-10 11:55:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:26,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:55:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:55:26,159 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 11:55:26,162 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 11:55:26,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:26,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:55:26,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:55:26,279 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 11:55:26,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:55:26,308 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 11:55:26,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110703980] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:55:26,308 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:55:26,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:55:26,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983687219] [2023-11-10 11:55:26,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:55:26,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:55:26,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:55:26,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:55:26,311 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 235 [2023-11-10 11:55:26,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 174 transitions, 398 flow. Second operand has 10 states, 10 states have (on average 181.4) internal successors, (1814), 10 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:26,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 235 [2023-11-10 11:55:26,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:26,398 INFO L124 PetriNetUnfolderBase]: 0/239 cut-off events. [2023-11-10 11:55:26,398 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2023-11-10 11:55:26,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 239 events. 0/239 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 562 event pairs, 0 based on Foata normal form. 2/241 useless extension candidates. Maximal degree in co-relation 0. Up to 15 conditions per place. [2023-11-10 11:55:26,399 INFO L140 encePairwiseOnDemand]: 229/235 looper letters, 16 selfloop transitions, 9 changer transitions 0/184 dead transitions. [2023-11-10 11:55:26,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 184 transitions, 470 flow [2023-11-10 11:55:26,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:55:26,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:55:26,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1638 transitions. [2023-11-10 11:55:26,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.774468085106383 [2023-11-10 11:55:26,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1638 transitions. [2023-11-10 11:55:26,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1638 transitions. [2023-11-10 11:55:26,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:26,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1638 transitions. [2023-11-10 11:55:26,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 182.0) internal successors, (1638), 9 states have internal predecessors, (1638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,412 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 235.0) internal successors, (2350), 10 states have internal predecessors, (2350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,412 INFO L175 Difference]: Start difference. First operand has 208 places, 174 transitions, 398 flow. Second operand 9 states and 1638 transitions. [2023-11-10 11:55:26,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 184 transitions, 470 flow [2023-11-10 11:55:26,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 184 transitions, 456 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-10 11:55:26,416 INFO L231 Difference]: Finished difference. Result has 197 places, 180 transitions, 434 flow [2023-11-10 11:55:26,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=434, PETRI_PLACES=197, PETRI_TRANSITIONS=180} [2023-11-10 11:55:26,416 INFO L281 CegarLoopForPetriNet]: 206 programPoint places, -9 predicate places. [2023-11-10 11:55:26,416 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 180 transitions, 434 flow [2023-11-10 11:55:26,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 181.4) internal successors, (1814), 10 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:26,418 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] [2023-11-10 11:55:26,427 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 11:55:26,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:55:26,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:26,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:26,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1652093547, now seen corresponding path program 1 times [2023-11-10 11:55:26,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:26,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176576034] [2023-11-10 11:55:26,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:26,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-10 11:55:26,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:26,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176576034] [2023-11-10 11:55:26,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176576034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:26,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:26,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-10 11:55:26,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791312948] [2023-11-10 11:55:26,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:26,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-10 11:55:26,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:26,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-10 11:55:26,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-10 11:55:26,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 235 [2023-11-10 11:55:26,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 180 transitions, 434 flow. Second operand has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:26,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:26,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 235 [2023-11-10 11:55:26,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:55,575 INFO L124 PetriNetUnfolderBase]: 110509/253053 cut-off events. [2023-11-10 11:55:55,575 INFO L125 PetriNetUnfolderBase]: For 2364/2364 co-relation queries the response was YES. [2023-11-10 11:55:57,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 396767 conditions, 253053 events. 110509/253053 cut-off events. For 2364/2364 co-relation queries the response was YES. Maximal size of possible extension queue 8996. Compared 3571270 event pairs, 63940 based on Foata normal form. 3875/253405 useless extension candidates. Maximal degree in co-relation 396658. Up to 88950 conditions per place. [2023-11-10 11:55:58,886 INFO L140 encePairwiseOnDemand]: 226/235 looper letters, 38 selfloop transitions, 6 changer transitions 65/259 dead transitions. [2023-11-10 11:55:58,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 259 transitions, 830 flow [2023-11-10 11:55:58,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-10 11:55:58,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-10 11:55:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1238 transitions. [2023-11-10 11:55:58,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7525835866261398 [2023-11-10 11:55:58,889 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1238 transitions. [2023-11-10 11:55:58,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1238 transitions. [2023-11-10 11:55:58,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:58,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1238 transitions. [2023-11-10 11:55:58,893 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 176.85714285714286) internal successors, (1238), 7 states have internal predecessors, (1238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:58,895 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:58,896 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 235.0) internal successors, (1880), 8 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:58,896 INFO L175 Difference]: Start difference. First operand has 197 places, 180 transitions, 434 flow. Second operand 7 states and 1238 transitions. [2023-11-10 11:55:58,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 259 transitions, 830 flow [2023-11-10 11:55:58,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 259 transitions, 824 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-11-10 11:55:58,902 INFO L231 Difference]: Finished difference. Result has 207 places, 185 transitions, 496 flow [2023-11-10 11:55:58,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=428, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=496, PETRI_PLACES=207, PETRI_TRANSITIONS=185} [2023-11-10 11:55:58,903 INFO L281 CegarLoopForPetriNet]: 206 programPoint places, 1 predicate places. [2023-11-10 11:55:58,903 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 185 transitions, 496 flow [2023-11-10 11:55:58,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 162.6) internal successors, (813), 5 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:58,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:58,904 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-10 11:55:58,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-10 11:55:58,904 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:58,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:58,904 INFO L85 PathProgramCache]: Analyzing trace with hash 162361643, now seen corresponding path program 1 times [2023-11-10 11:55:58,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:58,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401120392] [2023-11-10 11:55:58,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:58,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-10 11:55:59,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:59,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401120392] [2023-11-10 11:55:59,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401120392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:59,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:59,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-10 11:55:59,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751232313] [2023-11-10 11:55:59,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:59,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-10 11:55:59,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:59,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-10 11:55:59,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-10 11:55:59,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 235 [2023-11-10 11:55:59,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 185 transitions, 496 flow. Second operand has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:59,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:55:59,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 235 [2023-11-10 11:55:59,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:55:59,651 INFO L124 PetriNetUnfolderBase]: 343/3720 cut-off events. [2023-11-10 11:55:59,651 INFO L125 PetriNetUnfolderBase]: For 1362/1362 co-relation queries the response was YES. [2023-11-10 11:55:59,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6502 conditions, 3720 events. 343/3720 cut-off events. For 1362/1362 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 36043 event pairs, 265 based on Foata normal form. 1966/5676 useless extension candidates. Maximal degree in co-relation 6273. Up to 1002 conditions per place. [2023-11-10 11:55:59,673 INFO L140 encePairwiseOnDemand]: 222/235 looper letters, 40 selfloop transitions, 13 changer transitions 0/189 dead transitions. [2023-11-10 11:55:59,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 189 transitions, 630 flow [2023-11-10 11:55:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-10 11:55:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-10 11:55:59,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 774 transitions. [2023-11-10 11:55:59,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6587234042553192 [2023-11-10 11:55:59,676 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 774 transitions. [2023-11-10 11:55:59,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 774 transitions. [2023-11-10 11:55:59,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:55:59,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 774 transitions. [2023-11-10 11:55:59,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 154.8) internal successors, (774), 5 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:59,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:59,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 235.0) internal successors, (1410), 6 states have internal predecessors, (1410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:59,681 INFO L175 Difference]: Start difference. First operand has 207 places, 185 transitions, 496 flow. Second operand 5 states and 774 transitions. [2023-11-10 11:55:59,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 189 transitions, 630 flow [2023-11-10 11:55:59,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 189 transitions, 596 flow, removed 14 selfloop flow, removed 5 redundant places. [2023-11-10 11:55:59,691 INFO L231 Difference]: Finished difference. Result has 202 places, 185 transitions, 488 flow [2023-11-10 11:55:59,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=235, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=488, PETRI_PLACES=202, PETRI_TRANSITIONS=185} [2023-11-10 11:55:59,692 INFO L281 CegarLoopForPetriNet]: 206 programPoint places, -4 predicate places. [2023-11-10 11:55:59,692 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 185 transitions, 488 flow [2023-11-10 11:55:59,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 146.16666666666666) internal successors, (877), 6 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:55:59,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:59,693 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] [2023-11-10 11:55:59,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-10 11:55:59,693 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:59,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1314487951, now seen corresponding path program 1 times [2023-11-10 11:55:59,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:59,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889317327] [2023-11-10 11:55:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:59,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:59,713 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-10 11:55:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-10 11:55:59,730 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-10 11:55:59,730 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-10 11:55:59,730 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-10 11:55:59,731 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-10 11:55:59,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-10 11:55:59,731 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-11-10 11:55:59,731 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-10 11:55:59,731 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-11-10 11:55:59,755 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-11-10 11:55:59,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 233 places, 267 transitions, 606 flow [2023-11-10 11:55:59,933 INFO L124 PetriNetUnfolderBase]: 263/1593 cut-off events. [2023-11-10 11:55:59,934 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-11-10 11:55:59,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1819 conditions, 1593 events. 263/1593 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 9087 event pairs, 72 based on Foata normal form. 0/1387 useless extension candidates. Maximal degree in co-relation 1035. Up to 192 conditions per place. [2023-11-10 11:55:59,958 INFO L82 GeneralOperation]: Start removeDead. Operand has 233 places, 267 transitions, 606 flow [2023-11-10 11:55:59,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 233 places, 267 transitions, 606 flow [2023-11-10 11:55:59,969 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-10 11:55:59,969 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;@105f11dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-10 11:55:59,969 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-10 11:55:59,972 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-10 11:55:59,973 INFO L124 PetriNetUnfolderBase]: 3/73 cut-off events. [2023-11-10 11:55:59,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-10 11:55:59,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:55:59,973 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] [2023-11-10 11:55:59,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:55:59,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:55:59,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2131499290, now seen corresponding path program 1 times [2023-11-10 11:55:59,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:55:59,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419556238] [2023-11-10 11:55:59,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:55:59,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:55:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:55:59,997 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 11:55:59,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:55:59,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419556238] [2023-11-10 11:55:59,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419556238] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:55:59,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:55:59,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-10 11:55:59,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762152886] [2023-11-10 11:55:59,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:55:59,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-10 11:55:59,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:55:59,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-10 11:55:59,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-10 11:56:00,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 267 [2023-11-10 11:56:00,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 267 transitions, 606 flow. Second operand has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:00,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 267 [2023-11-10 11:56:00,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:00,243 INFO L124 PetriNetUnfolderBase]: 134/1438 cut-off events. [2023-11-10 11:56:00,243 INFO L125 PetriNetUnfolderBase]: For 626/626 co-relation queries the response was YES. [2023-11-10 11:56:00,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1967 conditions, 1438 events. 134/1438 cut-off events. For 626/626 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 8587 event pairs, 72 based on Foata normal form. 2971/4333 useless extension candidates. Maximal degree in co-relation 1082. Up to 298 conditions per place. [2023-11-10 11:56:00,254 INFO L140 encePairwiseOnDemand]: 223/267 looper letters, 16 selfloop transitions, 2 changer transitions 27/229 dead transitions. [2023-11-10 11:56:00,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 229 transitions, 580 flow [2023-11-10 11:56:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-10 11:56:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-10 11:56:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 686 transitions. [2023-11-10 11:56:00,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.8564294631710362 [2023-11-10 11:56:00,256 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 686 transitions. [2023-11-10 11:56:00,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 686 transitions. [2023-11-10 11:56:00,257 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:00,257 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 686 transitions. [2023-11-10 11:56:00,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 267.0) internal successors, (1068), 4 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,260 INFO L175 Difference]: Start difference. First operand has 233 places, 267 transitions, 606 flow. Second operand 3 states and 686 transitions. [2023-11-10 11:56:00,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 229 transitions, 580 flow [2023-11-10 11:56:00,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 229 transitions, 580 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-10 11:56:00,264 INFO L231 Difference]: Finished difference. Result has 235 places, 199 transitions, 462 flow [2023-11-10 11:56:00,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=235, PETRI_TRANSITIONS=199} [2023-11-10 11:56:00,265 INFO L281 CegarLoopForPetriNet]: 233 programPoint places, 2 predicate places. [2023-11-10 11:56:00,265 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 199 transitions, 462 flow [2023-11-10 11:56:00,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.33333333333334) internal successors, (616), 3 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:00,265 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] [2023-11-10 11:56:00,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-10 11:56:00,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:00,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:00,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1143478752, now seen corresponding path program 1 times [2023-11-10 11:56:00,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:00,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685520046] [2023-11-10 11:56:00,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:00,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:00,309 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:56:00,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:00,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685520046] [2023-11-10 11:56:00,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685520046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-10 11:56:00,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994552025] [2023-11-10 11:56:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:00,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:00,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-10 11:56:00,313 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-10 11:56:00,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-10 11:56:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:00,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-10 11:56:00,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-10 11:56:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:56:00,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-10 11:56:00,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-10 11:56:00,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994552025] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-10 11:56:00,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-10 11:56:00,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-10 11:56:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000895299] [2023-11-10 11:56:00,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-10 11:56:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-10 11:56:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-10 11:56:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-10 11:56:00,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 203 out of 267 [2023-11-10 11:56:00,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 199 transitions, 462 flow. Second operand has 10 states, 10 states have (on average 205.4) internal successors, (2054), 10 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:00,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 203 of 267 [2023-11-10 11:56:00,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-10 11:56:00,572 INFO L124 PetriNetUnfolderBase]: 0/286 cut-off events. [2023-11-10 11:56:00,572 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2023-11-10 11:56:00,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 286 events. 0/286 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 728 event pairs, 0 based on Foata normal form. 2/288 useless extension candidates. Maximal degree in co-relation 0. Up to 19 conditions per place. [2023-11-10 11:56:00,573 INFO L140 encePairwiseOnDemand]: 261/267 looper letters, 17 selfloop transitions, 9 changer transitions 0/209 dead transitions. [2023-11-10 11:56:00,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 209 transitions, 536 flow [2023-11-10 11:56:00,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-10 11:56:00,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-10 11:56:00,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1855 transitions. [2023-11-10 11:56:00,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7719517270079068 [2023-11-10 11:56:00,577 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1855 transitions. [2023-11-10 11:56:00,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1855 transitions. [2023-11-10 11:56:00,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-10 11:56:00,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1855 transitions. [2023-11-10 11:56:00,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 206.11111111111111) internal successors, (1855), 9 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,591 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,592 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 267.0) internal successors, (2670), 10 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,592 INFO L175 Difference]: Start difference. First operand has 235 places, 199 transitions, 462 flow. Second operand 9 states and 1855 transitions. [2023-11-10 11:56:00,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 209 transitions, 536 flow [2023-11-10 11:56:00,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 209 transitions, 514 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-11-10 11:56:00,597 INFO L231 Difference]: Finished difference. Result has 224 places, 205 transitions, 490 flow [2023-11-10 11:56:00,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=267, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=490, PETRI_PLACES=224, PETRI_TRANSITIONS=205} [2023-11-10 11:56:00,599 INFO L281 CegarLoopForPetriNet]: 233 programPoint places, -9 predicate places. [2023-11-10 11:56:00,599 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 205 transitions, 490 flow [2023-11-10 11:56:00,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 205.4) internal successors, (2054), 10 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-10 11:56:00,600 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] [2023-11-10 11:56:00,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-10 11:56:00,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-10 11:56:00,804 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-10 11:56:00,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-10 11:56:00,805 INFO L85 PathProgramCache]: Analyzing trace with hash -847160913, now seen corresponding path program 1 times [2023-11-10 11:56:00,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-10 11:56:00,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122429217] [2023-11-10 11:56:00,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-10 11:56:00,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-10 11:56:00,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-10 11:56:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-11-10 11:56:00,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-10 11:56:00,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122429217] [2023-11-10 11:56:00,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122429217] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-10 11:56:00,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-10 11:56:00,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-10 11:56:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212639502] [2023-11-10 11:56:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-10 11:56:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-10 11:56:00,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-10 11:56:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-10 11:56:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-10 11:56:00,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 267 [2023-11-10 11:56:00,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 205 transitions, 490 flow. Second operand has 5 states, 5 states have (on average 182.6) internal successors, (913), 5 states have internal predecessors, (913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-10 11:56:00,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-10 11:56:00,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 267 [2023-11-10 11:56:00,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand