/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true -i ../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 14:55:07,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 14:55:07,489 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 [2023-12-09 14:55:07,514 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 14:55:07,515 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 14:55:07,515 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 14:55:07,516 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 14:55:07,516 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 14:55:07,516 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 14:55:07,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 14:55:07,520 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 14:55:07,520 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 14:55:07,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 14:55:07,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 14:55:07,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 14:55:07,521 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 14:55:07,522 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 14:55:07,522 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 14:55:07,522 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 14:55:07,522 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 14:55:07,522 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 14:55:07,523 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 14:55:07,523 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 14:55:07,523 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 14:55:07,523 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 14:55:07,524 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:55:07,524 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 14:55:07,525 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 14:55:07,525 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 14:55:07,525 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 14:55:07,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 14:55:07,526 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 14:55:07,526 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 14:55:07,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 14:55:07,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 14:55:07,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 14:55:07,749 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 14:55:07,750 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 14:55:07,750 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 14:55:07,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i [2023-12-09 14:55:08,853 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 14:55:09,092 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 14:55:09,093 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i [2023-12-09 14:55:09,108 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1d144d9/a4c7a5fee8204bf28f6ae160582ebd44/FLAG0d276bb5f [2023-12-09 14:55:09,119 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b1d144d9/a4c7a5fee8204bf28f6ae160582ebd44 [2023-12-09 14:55:09,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 14:55:09,121 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 14:55:09,122 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 14:55:09,122 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 14:55:09,125 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 14:55:09,126 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,126 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@535b2590 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09, skipping insertion in model container [2023-12-09 14:55:09,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,151 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 14:55:09,363 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i[30745,30758] [2023-12-09 14:55:09,374 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:55:09,385 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 14:55:09,411 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs-pthread.i[30745,30758] [2023-12-09 14:55:09,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:55:09,442 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 14:55:09,442 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 14:55:09,447 INFO L206 MainTranslator]: Completed translation [2023-12-09 14:55:09,448 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09 WrapperNode [2023-12-09 14:55:09,448 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 14:55:09,449 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 14:55:09,449 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 14:55:09,449 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 14:55:09,454 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,488 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,510 INFO L138 Inliner]: procedures = 167, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-12-09 14:55:09,510 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 14:55:09,511 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 14:55:09,511 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 14:55:09,511 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 14:55:09,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,523 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,524 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,538 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,542 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 14:55:09,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 14:55:09,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 14:55:09,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 14:55:09,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (1/1) ... [2023-12-09 14:55:09,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:55:09,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:55:09,589 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) [2023-12-09 14:55:09,591 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 [2023-12-09 14:55:09,609 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-09 14:55:09,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-09 14:55:09,610 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 14:55:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-12-09 14:55:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-09 14:55:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 14:55:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 14:55:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 14:55:09,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 14:55:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-09 14:55:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-12-09 14:55:09,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 14:55:09,612 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 14:55:09,613 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-09 14:55:09,699 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 14:55:09,700 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 14:55:09,806 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 14:55:09,851 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 14:55:09,851 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-09 14:55:09,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:55:09 BoogieIcfgContainer [2023-12-09 14:55:09,857 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 14:55:09,873 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 14:55:09,873 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 14:55:09,876 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 14:55:09,876 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:55:09" (1/3) ... [2023-12-09 14:55:09,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3719f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:55:09, skipping insertion in model container [2023-12-09 14:55:09,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:09" (2/3) ... [2023-12-09 14:55:09,877 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e3719f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:55:09, skipping insertion in model container [2023-12-09 14:55:09,877 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:55:09" (3/3) ... [2023-12-09 14:55:09,878 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs-pthread.i [2023-12-09 14:55:09,892 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 14:55:09,892 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-09 14:55:09,892 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 14:55:09,984 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:10,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 73 transitions, 150 flow [2023-12-09 14:55:10,042 INFO L124 PetriNetUnfolderBase]: 4/84 cut-off events. [2023-12-09 14:55:10,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:55:10,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 84 events. 4/84 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 54. Up to 4 conditions per place. [2023-12-09 14:55:10,046 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 73 transitions, 150 flow [2023-12-09 14:55:10,049 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 73 transitions, 150 flow [2023-12-09 14:55:10,056 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:10,060 INFO L362 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=true, 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;@40f39485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:10,060 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-09 14:55:10,069 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:10,069 INFO L124 PetriNetUnfolderBase]: 2/46 cut-off events. [2023-12-09 14:55:10,069 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:55:10,069 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:10,070 INFO L233 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] [2023-12-09 14:55:10,070 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:55:10,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:10,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1166340452, now seen corresponding path program 1 times [2023-12-09 14:55:10,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:10,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822351431] [2023-12-09 14:55:10,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:10,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:55:10,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:10,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822351431] [2023-12-09 14:55:10,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822351431] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:10,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:10,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070846273] [2023-12-09 14:55:10,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:10,400 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:10,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:10,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:10,432 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 73 [2023-12-09 14:55:10,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 73 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:10,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 73 [2023-12-09 14:55:10,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:10,466 INFO L124 PetriNetUnfolderBase]: 1/68 cut-off events. [2023-12-09 14:55:10,467 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:10,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 68 events. 1/68 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 14 event pairs, 0 based on Foata normal form. 8/75 useless extension candidates. Maximal degree in co-relation 50. Up to 5 conditions per place. [2023-12-09 14:55:10,468 INFO L140 encePairwiseOnDemand]: 67/73 looper letters, 5 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-12-09 14:55:10,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 64 transitions, 146 flow [2023-12-09 14:55:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 199 transitions. [2023-12-09 14:55:10,489 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.908675799086758 [2023-12-09 14:55:10,490 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 199 transitions. [2023-12-09 14:55:10,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 199 transitions. [2023-12-09 14:55:10,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:10,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 199 transitions. [2023-12-09 14:55:10,499 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,504 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,504 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 73.0) internal successors, (292), 4 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,507 INFO L308 CegarLoopForPetriNet]: 73 programPoint places, -5 predicate places. [2023-12-09 14:55:10,507 INFO L500 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 146 flow [2023-12-09 14:55:10,508 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,508 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:10,508 INFO L233 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] [2023-12-09 14:55:10,508 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 14:55:10,508 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:55:10,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:10,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1948919992, now seen corresponding path program 1 times [2023-12-09 14:55:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:10,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71032987] [2023-12-09 14:55:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:10,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:10,538 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:10,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:10,567 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:10,568 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:10,569 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-09 14:55:10,571 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-09 14:55:10,571 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-09 14:55:10,571 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-09 14:55:10,572 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:10,574 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:10,574 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 14:55:10,596 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 115 transitions, 240 flow [2023-12-09 14:55:10,619 INFO L124 PetriNetUnfolderBase]: 7/139 cut-off events. [2023-12-09 14:55:10,620 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-09 14:55:10,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 139 events. 7/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 218 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 95. Up to 6 conditions per place. [2023-12-09 14:55:10,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 115 places, 115 transitions, 240 flow [2023-12-09 14:55:10,623 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 115 transitions, 240 flow [2023-12-09 14:55:10,624 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:10,625 INFO L362 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=true, 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;@40f39485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:10,625 INFO L363 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-09 14:55:10,635 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:10,636 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-12-09 14:55:10,636 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:10,636 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:10,636 INFO L233 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] [2023-12-09 14:55:10,636 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:55:10,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:10,637 INFO L85 PathProgramCache]: Analyzing trace with hash 743849239, now seen corresponding path program 1 times [2023-12-09 14:55:10,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:10,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643714334] [2023-12-09 14:55:10,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:10,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:55:10,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:10,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643714334] [2023-12-09 14:55:10,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643714334] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:10,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:10,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:10,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998288645] [2023-12-09 14:55:10,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:10,686 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:10,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:10,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:10,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:10,688 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 115 [2023-12-09 14:55:10,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 115 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:10,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 115 [2023-12-09 14:55:10,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:10,783 INFO L124 PetriNetUnfolderBase]: 39/374 cut-off events. [2023-12-09 14:55:10,783 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-12-09 14:55:10,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 477 conditions, 374 events. 39/374 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1579 event pairs, 16 based on Foata normal form. 58/419 useless extension candidates. Maximal degree in co-relation 372. Up to 47 conditions per place. [2023-12-09 14:55:10,789 INFO L140 encePairwiseOnDemand]: 106/115 looper letters, 21 selfloop transitions, 3 changer transitions 0/115 dead transitions. [2023-12-09 14:55:10,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 115 transitions, 293 flow [2023-12-09 14:55:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 322 transitions. [2023-12-09 14:55:10,794 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9333333333333333 [2023-12-09 14:55:10,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 322 transitions. [2023-12-09 14:55:10,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 322 transitions. [2023-12-09 14:55:10,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:10,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 322 transitions. [2023-12-09 14:55:10,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.33333333333333) internal successors, (322), 3 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,803 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,804 INFO L308 CegarLoopForPetriNet]: 115 programPoint places, -4 predicate places. [2023-12-09 14:55:10,804 INFO L500 AbstractCegarLoop]: Abstraction has has 111 places, 115 transitions, 293 flow [2023-12-09 14:55:10,804 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.0) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:10,804 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:10,805 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:55:10,805 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-09 14:55:10,805 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2023-12-09 14:55:10,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:10,805 INFO L85 PathProgramCache]: Analyzing trace with hash -590802459, now seen corresponding path program 1 times [2023-12-09 14:55:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:10,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742582321] [2023-12-09 14:55:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:10,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:10,827 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:10,850 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:10,851 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:10,852 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-12-09 14:55:10,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-09 14:55:10,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-09 14:55:10,852 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-09 14:55:10,852 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 14:55:10,852 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:10,854 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:10,854 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 14:55:10,898 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:10,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 157 places, 157 transitions, 332 flow [2023-12-09 14:55:10,928 INFO L124 PetriNetUnfolderBase]: 10/194 cut-off events. [2023-12-09 14:55:10,928 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-09 14:55:10,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 194 events. 10/194 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 466 event pairs, 0 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 143. Up to 8 conditions per place. [2023-12-09 14:55:10,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 157 places, 157 transitions, 332 flow [2023-12-09 14:55:10,932 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 157 places, 157 transitions, 332 flow [2023-12-09 14:55:10,933 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:10,936 INFO L362 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=true, 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;@40f39485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:10,936 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 14:55:10,939 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:10,940 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-12-09 14:55:10,940 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:10,940 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:10,940 INFO L233 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] [2023-12-09 14:55:10,941 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:55:10,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash -326653269, now seen corresponding path program 1 times [2023-12-09 14:55:10,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:10,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121398592] [2023-12-09 14:55:10,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:10,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:55:11,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:11,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121398592] [2023-12-09 14:55:11,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121398592] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:11,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:11,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:11,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905085866] [2023-12-09 14:55:11,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:11,014 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:11,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:11,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:11,018 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 157 [2023-12-09 14:55:11,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 157 transitions, 332 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:11,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:11,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 157 [2023-12-09 14:55:11,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:11,356 INFO L124 PetriNetUnfolderBase]: 522/2573 cut-off events. [2023-12-09 14:55:11,356 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2023-12-09 14:55:11,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3576 conditions, 2573 events. 522/2573 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 22167 event pairs, 199 based on Foata normal form. 450/2890 useless extension candidates. Maximal degree in co-relation 2870. Up to 626 conditions per place. [2023-12-09 14:55:11,380 INFO L140 encePairwiseOnDemand]: 145/157 looper letters, 32 selfloop transitions, 4 changer transitions 0/161 dead transitions. [2023-12-09 14:55:11,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 161 transitions, 424 flow [2023-12-09 14:55:11,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-12-09 14:55:11,381 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9320594479830149 [2023-12-09 14:55:11,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-12-09 14:55:11,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-12-09 14:55:11,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:11,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-12-09 14:55:11,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:11,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:11,385 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:11,386 INFO L308 CegarLoopForPetriNet]: 157 programPoint places, -4 predicate places. [2023-12-09 14:55:11,386 INFO L500 AbstractCegarLoop]: Abstraction has has 153 places, 161 transitions, 424 flow [2023-12-09 14:55:11,386 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:11,386 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:11,387 INFO L233 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:55:11,387 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 14:55:11,387 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2023-12-09 14:55:11,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash -925627481, now seen corresponding path program 1 times [2023-12-09 14:55:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:11,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411399715] [2023-12-09 14:55:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:11,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:11,415 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:11,475 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:11,476 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:11,476 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-09 14:55:11,476 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-09 14:55:11,476 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-09 14:55:11,476 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-09 14:55:11,477 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-09 14:55:11,477 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-09 14:55:11,477 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:11,477 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:11,477 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-09 14:55:11,504 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:11,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 199 transitions, 426 flow [2023-12-09 14:55:11,531 INFO L124 PetriNetUnfolderBase]: 13/249 cut-off events. [2023-12-09 14:55:11,531 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-12-09 14:55:11,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 268 conditions, 249 events. 13/249 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 707 event pairs, 0 based on Foata normal form. 0/227 useless extension candidates. Maximal degree in co-relation 202. Up to 10 conditions per place. [2023-12-09 14:55:11,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 199 transitions, 426 flow [2023-12-09 14:55:11,535 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 199 transitions, 426 flow [2023-12-09 14:55:11,535 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:11,536 INFO L362 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=true, 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;@40f39485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:11,536 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-09 14:55:11,539 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:11,539 INFO L124 PetriNetUnfolderBase]: 2/48 cut-off events. [2023-12-09 14:55:11,539 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:11,539 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:11,539 INFO L233 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] [2023-12-09 14:55:11,539 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:55:11,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:11,540 INFO L85 PathProgramCache]: Analyzing trace with hash 141534130, now seen corresponding path program 1 times [2023-12-09 14:55:11,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:11,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899857102] [2023-12-09 14:55:11,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:11,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:55:11,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:11,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899857102] [2023-12-09 14:55:11,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899857102] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:11,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:11,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:11,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054365791] [2023-12-09 14:55:11,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:11,570 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:11,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:11,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:11,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:11,571 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 199 [2023-12-09 14:55:11,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 199 transitions, 426 flow. Second operand has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:11,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:11,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 199 [2023-12-09 14:55:11,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:14,001 INFO L124 PetriNetUnfolderBase]: 5634/18909 cut-off events. [2023-12-09 14:55:14,001 INFO L125 PetriNetUnfolderBase]: For 3085/3085 co-relation queries the response was YES. [2023-12-09 14:55:14,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28361 conditions, 18909 events. 5634/18909 cut-off events. For 3085/3085 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 222598 event pairs, 1983 based on Foata normal form. 3568/21235 useless extension candidates. Maximal degree in co-relation 22882. Up to 6832 conditions per place. [2023-12-09 14:55:14,210 INFO L140 encePairwiseOnDemand]: 184/199 looper letters, 43 selfloop transitions, 5 changer transitions 0/207 dead transitions. [2023-12-09 14:55:14,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 207 transitions, 559 flow [2023-12-09 14:55:14,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:14,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-12-09 14:55:14,212 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.931323283082077 [2023-12-09 14:55:14,212 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-12-09 14:55:14,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-12-09 14:55:14,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:14,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-12-09 14:55:14,214 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 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) [2023-12-09 14:55:14,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:14,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 199.0) internal successors, (796), 4 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:14,216 INFO L308 CegarLoopForPetriNet]: 199 programPoint places, -4 predicate places. [2023-12-09 14:55:14,216 INFO L500 AbstractCegarLoop]: Abstraction has has 195 places, 207 transitions, 559 flow [2023-12-09 14:55:14,217 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:14,217 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:14,217 INFO L233 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:55:14,217 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-09 14:55:14,217 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2023-12-09 14:55:14,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:14,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2144249974, now seen corresponding path program 1 times [2023-12-09 14:55:14,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:14,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547414132] [2023-12-09 14:55:14,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:14,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:14,239 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:14,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:14,259 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:14,259 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:14,259 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-09 14:55:14,260 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-09 14:55:14,260 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-09 14:55:14,260 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-09 14:55:14,260 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-09 14:55:14,260 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-09 14:55:14,260 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-09 14:55:14,260 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:14,261 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:14,261 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-09 14:55:14,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:14,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 241 places, 241 transitions, 522 flow [2023-12-09 14:55:14,429 INFO L124 PetriNetUnfolderBase]: 16/304 cut-off events. [2023-12-09 14:55:14,429 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-12-09 14:55:14,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 330 conditions, 304 events. 16/304 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 947 event pairs, 0 based on Foata normal form. 0/277 useless extension candidates. Maximal degree in co-relation 262. Up to 12 conditions per place. [2023-12-09 14:55:14,432 INFO L82 GeneralOperation]: Start removeDead. Operand has 241 places, 241 transitions, 522 flow [2023-12-09 14:55:14,434 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 241 places, 241 transitions, 522 flow [2023-12-09 14:55:14,434 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:14,435 INFO L362 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=true, 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;@40f39485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:14,435 INFO L363 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-09 14:55:14,437 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:14,437 INFO L124 PetriNetUnfolderBase]: 2/47 cut-off events. [2023-12-09 14:55:14,437 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:14,437 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:14,437 INFO L233 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] [2023-12-09 14:55:14,437 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:55:14,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:14,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1015843281, now seen corresponding path program 1 times [2023-12-09 14:55:14,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:14,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380523577] [2023-12-09 14:55:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:14,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:14,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:55:14,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:14,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380523577] [2023-12-09 14:55:14,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380523577] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:14,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:14,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:14,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305799642] [2023-12-09 14:55:14,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:14,496 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:14,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:14,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:14,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:14,498 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 241 [2023-12-09 14:55:14,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 241 transitions, 522 flow. Second operand has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:14,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:14,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 241 [2023-12-09 14:55:14,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:35,069 INFO L124 PetriNetUnfolderBase]: 54911/147380 cut-off events. [2023-12-09 14:55:35,070 INFO L125 PetriNetUnfolderBase]: For 33569/33569 co-relation queries the response was YES. [2023-12-09 14:55:36,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232582 conditions, 147380 events. 54911/147380 cut-off events. For 33569/33569 co-relation queries the response was YES. Maximal size of possible extension queue 5432. Compared 2093658 event pairs, 18702 based on Foata normal form. 28264/164489 useless extension candidates. Maximal degree in co-relation 187718. Up to 66293 conditions per place. [2023-12-09 14:55:37,827 INFO L140 encePairwiseOnDemand]: 223/241 looper letters, 54 selfloop transitions, 6 changer transitions 0/253 dead transitions. [2023-12-09 14:55:37,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 253 transitions, 698 flow [2023-12-09 14:55:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:37,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:37,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-12-09 14:55:37,830 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9308437067773168 [2023-12-09 14:55:37,830 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-12-09 14:55:37,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-12-09 14:55:37,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:37,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-12-09 14:55:37,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:37,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:37,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 241.0) internal successors, (964), 4 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:37,836 INFO L308 CegarLoopForPetriNet]: 241 programPoint places, -4 predicate places. [2023-12-09 14:55:37,836 INFO L500 AbstractCegarLoop]: Abstraction has has 237 places, 253 transitions, 698 flow [2023-12-09 14:55:37,837 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:37,837 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:37,837 INFO L233 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 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] [2023-12-09 14:55:37,837 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-09 14:55:37,837 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2023-12-09 14:55:37,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:37,838 INFO L85 PathProgramCache]: Analyzing trace with hash -611687746, now seen corresponding path program 1 times [2023-12-09 14:55:37,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:37,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879774017] [2023-12-09 14:55:37,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:37,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:37,858 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:37,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:37,882 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:37,883 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-12-09 14:55:37,883 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-12-09 14:55:37,884 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-09 14:55:37,884 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:37,885 WARN L227 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:37,885 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-12-09 14:55:37,925 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:37,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 283 places, 283 transitions, 620 flow [2023-12-09 14:55:37,967 INFO L124 PetriNetUnfolderBase]: 19/359 cut-off events. [2023-12-09 14:55:37,968 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-12-09 14:55:37,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 359 events. 19/359 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1196 event pairs, 0 based on Foata normal form. 0/327 useless extension candidates. Maximal degree in co-relation 323. Up to 14 conditions per place. [2023-12-09 14:55:37,972 INFO L82 GeneralOperation]: Start removeDead. Operand has 283 places, 283 transitions, 620 flow [2023-12-09 14:55:37,974 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 283 places, 283 transitions, 620 flow [2023-12-09 14:55:37,977 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:37,981 INFO L362 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=true, 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;@40f39485, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:37,981 INFO L363 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-12-09 14:55:37,983 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:37,983 INFO L124 PetriNetUnfolderBase]: 2/47 cut-off events. [2023-12-09 14:55:37,983 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:37,983 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:37,983 INFO L233 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] [2023-12-09 14:55:37,983 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2023-12-09 14:55:37,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:37,984 INFO L85 PathProgramCache]: Analyzing trace with hash -866124957, now seen corresponding path program 1 times [2023-12-09 14:55:37,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:37,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538567779] [2023-12-09 14:55:37,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:37,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-09 14:55:38,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:38,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538567779] [2023-12-09 14:55:38,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538567779] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:38,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:38,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:38,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399887694] [2023-12-09 14:55:38,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:38,017 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:38,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:38,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:38,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:38,018 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 232 out of 283 [2023-12-09 14:55:38,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 283 transitions, 620 flow. Second operand has 3 states, 3 states have (on average 233.0) internal successors, (699), 3 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:38,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:38,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 232 of 283 [2023-12-09 14:55:38,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand