/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.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-a20a710-m [2023-12-09 14:55:19,499 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-09 14:55:19,590 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 14:55:19,621 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-09 14:55:19,622 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-09 14:55:19,622 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-09 14:55:19,625 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-09 14:55:19,626 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-09 14:55:19,626 INFO L153 SettingsManager]: * Use SBE=true [2023-12-09 14:55:19,630 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-09 14:55:19,630 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-09 14:55:19,631 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-09 14:55:19,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-09 14:55:19,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-09 14:55:19,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-09 14:55:19,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-09 14:55:19,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-09 14:55:19,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-09 14:55:19,633 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-09 14:55:19,634 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-09 14:55:19,634 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-09 14:55:19,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-09 14:55:19,635 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-09 14:55:19,635 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-09 14:55:19,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-09 14:55:19,636 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:55:19,637 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-09 14:55:19,637 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-09 14:55:19,637 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-09 14:55:19,637 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-09 14:55:19,638 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-09 14:55:19,638 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-09 14:55:19,639 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-09 14:55:19,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-12-09 14:55:19,872 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-09 14:55:19,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-09 14:55:19,902 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-09 14:55:19,903 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-09 14:55:19,903 INFO L274 PluginConnector]: CDTParser initialized [2023-12-09 14:55:19,904 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-12-09 14:55:21,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-09 14:55:21,307 INFO L384 CDTParser]: Found 1 translation units. [2023-12-09 14:55:21,307 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/39_rand_lock_p0_vs.i [2023-12-09 14:55:21,319 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f6e9306/7ff6195c97b448e98f3d24f5ccafcd7b/FLAG217ba66e3 [2023-12-09 14:55:21,332 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b2f6e9306/7ff6195c97b448e98f3d24f5ccafcd7b [2023-12-09 14:55:21,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-09 14:55:21,334 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-09 14:55:21,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-09 14:55:21,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-09 14:55:21,339 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-09 14:55:21,340 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,341 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c4f6dc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21, skipping insertion in model container [2023-12-09 14:55:21,341 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,378 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-09 14:55:21,664 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.i[30959,30972] [2023-12-09 14:55:21,677 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:55:21,687 INFO L202 MainTranslator]: Completed pre-run [2023-12-09 14:55:21,763 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.i[30959,30972] [2023-12-09 14:55:21,766 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-09 14:55:21,795 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 14:55:21,795 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-09 14:55:21,800 INFO L206 MainTranslator]: Completed translation [2023-12-09 14:55:21,801 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21 WrapperNode [2023-12-09 14:55:21,801 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-09 14:55:21,802 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-09 14:55:21,802 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-09 14:55:21,802 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-09 14:55:21,808 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,825 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,845 INFO L138 Inliner]: procedures = 175, calls = 20, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 75 [2023-12-09 14:55:21,845 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-09 14:55:21,846 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-09 14:55:21,846 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-09 14:55:21,846 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-09 14:55:21,854 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,869 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,870 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,874 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,877 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,878 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,879 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,881 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-09 14:55:21,882 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-09 14:55:21,882 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-09 14:55:21,882 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-09 14:55:21,900 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (1/1) ... [2023-12-09 14:55:21,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-09 14:55:21,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-09 14:55:21,928 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 14:55:21,933 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 14:55:21,953 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-09 14:55:21,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-09 14:55:21,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-09 14:55:21,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-09 14:55:21,956 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 14:55:22,053 INFO L241 CfgBuilder]: Building ICFG [2023-12-09 14:55:22,056 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-09 14:55:22,235 INFO L282 CfgBuilder]: Performing block encoding [2023-12-09 14:55:22,296 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-09 14:55:22,296 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-09 14:55:22,299 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:55:22 BoogieIcfgContainer [2023-12-09 14:55:22,299 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-09 14:55:22,302 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-09 14:55:22,302 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-09 14:55:22,305 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-09 14:55:22,306 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:55:21" (1/3) ... [2023-12-09 14:55:22,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d407fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:55:22, skipping insertion in model container [2023-12-09 14:55:22,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:55:21" (2/3) ... [2023-12-09 14:55:22,307 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52d407fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:55:22, skipping insertion in model container [2023-12-09 14:55:22,307 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:55:22" (3/3) ... [2023-12-09 14:55:22,309 INFO L112 eAbstractionObserver]: Analyzing ICFG 39_rand_lock_p0_vs.i [2023-12-09 14:55:22,327 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-09 14:55:22,327 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-09 14:55:22,327 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-09 14:55:22,378 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:22,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 65 transitions, 134 flow [2023-12-09 14:55:22,470 INFO L124 PetriNetUnfolderBase]: 4/76 cut-off events. [2023-12-09 14:55:22,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:55:22,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 76 events. 4/76 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2023-12-09 14:55:22,479 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 65 transitions, 134 flow [2023-12-09 14:55:22,487 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 65 transitions, 134 flow [2023-12-09 14:55:22,501 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:22,509 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;@2c63a91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:22,510 INFO L363 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-12-09 14:55:22,531 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:22,532 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:55:22,532 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-09 14:55:22,532 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:22,533 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] [2023-12-09 14:55:22,534 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-09 14:55:22,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash -611174826, now seen corresponding path program 1 times [2023-12-09 14:55:22,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:22,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842021042] [2023-12-09 14:55:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:22,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:22,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:22,831 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 14:55:22,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:22,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842021042] [2023-12-09 14:55:22,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842021042] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:22,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:22,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:22,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013135075] [2023-12-09 14:55:22,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:22,842 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:22,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:22,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:22,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:22,870 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 65 [2023-12-09 14:55:22,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 14:55:22,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:22,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 65 [2023-12-09 14:55:22,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:22,899 INFO L124 PetriNetUnfolderBase]: 1/60 cut-off events. [2023-12-09 14:55:22,899 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:22,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 60 events. 1/60 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. 8/67 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2023-12-09 14:55:22,901 INFO L140 encePairwiseOnDemand]: 59/65 looper letters, 5 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2023-12-09 14:55:22,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 130 flow [2023-12-09 14:55:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 175 transitions. [2023-12-09 14:55:22,912 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.8974358974358975 [2023-12-09 14:55:22,912 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 175 transitions. [2023-12-09 14:55:22,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 175 transitions. [2023-12-09 14:55:22,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:22,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 175 transitions. [2023-12-09 14:55:22,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 14:55:22,924 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 14:55:22,925 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 65.0) internal successors, (260), 4 states have internal predecessors, (260), 0 states have call successors, (0), 0 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 14:55:22,927 INFO L308 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-12-09 14:55:22,927 INFO L500 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 130 flow [2023-12-09 14:55:22,928 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 14:55:22,928 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:22,928 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-09 14:55:22,928 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-09 14:55:22,929 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 14:55:22,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:22,929 INFO L85 PathProgramCache]: Analyzing trace with hash 814466019, now seen corresponding path program 1 times [2023-12-09 14:55:22,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:22,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760556793] [2023-12-09 14:55:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:22,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:22,950 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:22,977 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:22,977 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:22,979 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-12-09 14:55:22,980 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-12-09 14:55:22,981 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-12-09 14:55:22,981 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-09 14:55:22,981 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:22,983 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:22,983 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-09 14:55:23,010 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:23,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 105 transitions, 220 flow [2023-12-09 14:55:23,047 INFO L124 PetriNetUnfolderBase]: 7/129 cut-off events. [2023-12-09 14:55:23,048 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-09 14:55:23,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137 conditions, 129 events. 7/129 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 221 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 91. Up to 6 conditions per place. [2023-12-09 14:55:23,052 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 105 transitions, 220 flow [2023-12-09 14:55:23,053 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 105 places, 105 transitions, 220 flow [2023-12-09 14:55:23,055 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:23,056 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;@2c63a91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:23,056 INFO L363 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-12-09 14:55:23,072 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:23,072 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:55:23,072 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:23,072 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:23,073 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] [2023-12-09 14:55:23,073 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 14:55:23,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:23,074 INFO L85 PathProgramCache]: Analyzing trace with hash -188912161, now seen corresponding path program 1 times [2023-12-09 14:55:23,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:23,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114774897] [2023-12-09 14:55:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:23,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:23,145 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 14:55:23,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:23,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114774897] [2023-12-09 14:55:23,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114774897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:23,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:23,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804946825] [2023-12-09 14:55:23,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:23,146 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:23,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:23,148 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 105 [2023-12-09 14:55:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 105 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 14:55:23,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:23,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 105 [2023-12-09 14:55:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:23,264 INFO L124 PetriNetUnfolderBase]: 39/340 cut-off events. [2023-12-09 14:55:23,264 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-12-09 14:55:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 340 events. 39/340 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1410 event pairs, 16 based on Foata normal form. 58/385 useless extension candidates. Maximal degree in co-relation 346. Up to 47 conditions per place. [2023-12-09 14:55:23,271 INFO L140 encePairwiseOnDemand]: 96/105 looper letters, 21 selfloop transitions, 3 changer transitions 0/105 dead transitions. [2023-12-09 14:55:23,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 105 transitions, 273 flow [2023-12-09 14:55:23,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:23,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 292 transitions. [2023-12-09 14:55:23,278 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.926984126984127 [2023-12-09 14:55:23,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 292 transitions. [2023-12-09 14:55:23,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 292 transitions. [2023-12-09 14:55:23,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:23,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 292 transitions. [2023-12-09 14:55:23,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 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 14:55:23,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 14:55:23,287 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 105.0) internal successors, (420), 4 states have internal predecessors, (420), 0 states have call successors, (0), 0 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 14:55:23,288 INFO L308 CegarLoopForPetriNet]: 105 programPoint places, -4 predicate places. [2023-12-09 14:55:23,288 INFO L500 AbstractCegarLoop]: Abstraction has has 101 places, 105 transitions, 273 flow [2023-12-09 14:55:23,289 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 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 14:55:23,289 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:23,289 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] [2023-12-09 14:55:23,289 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-09 14:55:23,291 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 14:55:23,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1114969529, now seen corresponding path program 1 times [2023-12-09 14:55:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:23,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069755531] [2023-12-09 14:55:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:23,323 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:23,350 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:23,351 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:23,351 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-12-09 14:55:23,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2023-12-09 14:55:23,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2023-12-09 14:55:23,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2023-12-09 14:55:23,352 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-09 14:55:23,352 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:23,352 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:23,353 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-09 14:55:23,402 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:23,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 145 transitions, 308 flow [2023-12-09 14:55:23,441 INFO L124 PetriNetUnfolderBase]: 10/182 cut-off events. [2023-12-09 14:55:23,442 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-09 14:55:23,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 182 events. 10/182 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 441 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 133. Up to 8 conditions per place. [2023-12-09 14:55:23,447 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 145 transitions, 308 flow [2023-12-09 14:55:23,450 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 145 places, 145 transitions, 308 flow [2023-12-09 14:55:23,452 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:23,454 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;@2c63a91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:23,454 INFO L363 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-12-09 14:55:23,460 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:23,461 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:55:23,461 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:23,461 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:23,461 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] [2023-12-09 14:55:23,461 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 14:55:23,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1600659721, now seen corresponding path program 1 times [2023-12-09 14:55:23,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:23,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939215557] [2023-12-09 14:55:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:23,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:23,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:23,595 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 14:55:23,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:23,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939215557] [2023-12-09 14:55:23,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939215557] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:23,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:23,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:23,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670815481] [2023-12-09 14:55:23,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:23,597 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:23,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:23,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:23,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:23,600 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 145 [2023-12-09 14:55:23,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 145 transitions, 308 flow. Second operand has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 14:55:23,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:23,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 145 [2023-12-09 14:55:23,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:23,983 INFO L124 PetriNetUnfolderBase]: 522/2367 cut-off events. [2023-12-09 14:55:23,984 INFO L125 PetriNetUnfolderBase]: For 262/262 co-relation queries the response was YES. [2023-12-09 14:55:24,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3370 conditions, 2367 events. 522/2367 cut-off events. For 262/262 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 19709 event pairs, 199 based on Foata normal form. 450/2684 useless extension candidates. Maximal degree in co-relation 2698. Up to 626 conditions per place. [2023-12-09 14:55:24,014 INFO L140 encePairwiseOnDemand]: 133/145 looper letters, 32 selfloop transitions, 4 changer transitions 0/149 dead transitions. [2023-12-09 14:55:24,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 149 transitions, 400 flow [2023-12-09 14:55:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:24,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 403 transitions. [2023-12-09 14:55:24,017 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9264367816091954 [2023-12-09 14:55:24,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 403 transitions. [2023-12-09 14:55:24,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 403 transitions. [2023-12-09 14:55:24,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:24,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 403 transitions. [2023-12-09 14:55:24,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.33333333333334) internal successors, (403), 3 states have internal predecessors, (403), 0 states have call successors, (0), 0 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 14:55:24,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 14:55:24,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 145.0) internal successors, (580), 4 states have internal predecessors, (580), 0 states have call successors, (0), 0 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 14:55:24,024 INFO L308 CegarLoopForPetriNet]: 145 programPoint places, -4 predicate places. [2023-12-09 14:55:24,025 INFO L500 AbstractCegarLoop]: Abstraction has has 141 places, 149 transitions, 400 flow [2023-12-09 14:55:24,025 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.0) internal successors, (357), 3 states have internal predecessors, (357), 0 states have call successors, (0), 0 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 14:55:24,025 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:24,025 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] [2023-12-09 14:55:24,025 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-09 14:55:24,025 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 14:55:24,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:24,030 INFO L85 PathProgramCache]: Analyzing trace with hash -302001892, now seen corresponding path program 1 times [2023-12-09 14:55:24,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:24,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033674542] [2023-12-09 14:55:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:24,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:24,064 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:24,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:24,081 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:24,082 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-12-09 14:55:24,082 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2023-12-09 14:55:24,082 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2023-12-09 14:55:24,083 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2023-12-09 14:55:24,083 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2023-12-09 14:55:24,083 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-09 14:55:24,083 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:24,084 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:24,084 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-12-09 14:55:24,128 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 185 transitions, 398 flow [2023-12-09 14:55:24,164 INFO L124 PetriNetUnfolderBase]: 13/235 cut-off events. [2023-12-09 14:55:24,164 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-12-09 14:55:24,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 235 events. 13/235 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 681 event pairs, 0 based on Foata normal form. 0/213 useless extension candidates. Maximal degree in co-relation 190. Up to 10 conditions per place. [2023-12-09 14:55:24,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 185 places, 185 transitions, 398 flow [2023-12-09 14:55:24,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 185 transitions, 398 flow [2023-12-09 14:55:24,172 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:24,177 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;@2c63a91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:24,177 INFO L363 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-09 14:55:24,183 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:24,184 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:55:24,184 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:24,185 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:24,187 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] [2023-12-09 14:55:24,188 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 14:55:24,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1019073822, now seen corresponding path program 1 times [2023-12-09 14:55:24,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:24,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402781750] [2023-12-09 14:55:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:24,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:24,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:24,264 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 14:55:24,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:24,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402781750] [2023-12-09 14:55:24,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402781750] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:24,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:24,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:24,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962058180] [2023-12-09 14:55:24,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:24,268 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:24,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:24,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:24,270 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 185 [2023-12-09 14:55:24,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 185 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 14:55:24,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:24,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 185 [2023-12-09 14:55:24,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:27,130 INFO L124 PetriNetUnfolderBase]: 5634/17837 cut-off events. [2023-12-09 14:55:27,130 INFO L125 PetriNetUnfolderBase]: For 3085/3085 co-relation queries the response was YES. [2023-12-09 14:55:27,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27289 conditions, 17837 events. 5634/17837 cut-off events. For 3085/3085 co-relation queries the response was YES. Maximal size of possible extension queue 862. Compared 204774 event pairs, 1983 based on Foata normal form. 3568/20155 useless extension candidates. Maximal degree in co-relation 21962. Up to 6832 conditions per place. [2023-12-09 14:55:27,354 INFO L140 encePairwiseOnDemand]: 170/185 looper letters, 43 selfloop transitions, 5 changer transitions 0/193 dead transitions. [2023-12-09 14:55:27,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 193 transitions, 531 flow [2023-12-09 14:55:27,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-12-09 14:55:27,356 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9261261261261261 [2023-12-09 14:55:27,356 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-12-09 14:55:27,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-12-09 14:55:27,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:27,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-12-09 14:55:27,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 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 14:55:27,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 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 14:55:27,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 185.0) internal successors, (740), 4 states have internal predecessors, (740), 0 states have call successors, (0), 0 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 14:55:27,361 INFO L308 CegarLoopForPetriNet]: 185 programPoint places, -4 predicate places. [2023-12-09 14:55:27,361 INFO L500 AbstractCegarLoop]: Abstraction has has 181 places, 193 transitions, 531 flow [2023-12-09 14:55:27,362 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 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 14:55:27,362 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:27,362 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] [2023-12-09 14:55:27,362 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-09 14:55:27,362 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 14:55:27,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1319901708, now seen corresponding path program 1 times [2023-12-09 14:55:27,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:27,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246229279] [2023-12-09 14:55:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:27,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:27,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:27,384 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:27,411 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:27,412 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:27,412 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2023-12-09 14:55:27,412 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2023-12-09 14:55:27,412 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2023-12-09 14:55:27,412 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2023-12-09 14:55:27,412 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2023-12-09 14:55:27,412 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2023-12-09 14:55:27,413 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-09 14:55:27,413 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:27,413 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:27,413 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-12-09 14:55:27,448 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:27,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 225 places, 225 transitions, 490 flow [2023-12-09 14:55:27,489 INFO L124 PetriNetUnfolderBase]: 16/288 cut-off events. [2023-12-09 14:55:27,489 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2023-12-09 14:55:27,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 288 events. 16/288 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 927 event pairs, 0 based on Foata normal form. 0/261 useless extension candidates. Maximal degree in co-relation 248. Up to 12 conditions per place. [2023-12-09 14:55:27,493 INFO L82 GeneralOperation]: Start removeDead. Operand has 225 places, 225 transitions, 490 flow [2023-12-09 14:55:27,495 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 225 places, 225 transitions, 490 flow [2023-12-09 14:55:27,496 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:27,496 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;@2c63a91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:27,496 INFO L363 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-12-09 14:55:27,498 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:27,498 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:55:27,499 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:27,499 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:27,499 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] [2023-12-09 14:55:27,499 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 14:55:27,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:27,499 INFO L85 PathProgramCache]: Analyzing trace with hash 616809173, now seen corresponding path program 1 times [2023-12-09 14:55:27,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:27,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848151605] [2023-12-09 14:55:27,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:27,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:27,530 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 14:55:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848151605] [2023-12-09 14:55:27,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848151605] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:27,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:27,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285084013] [2023-12-09 14:55:27,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:27,531 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:27,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:27,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:27,532 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 225 [2023-12-09 14:55:27,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 225 transitions, 490 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 14:55:27,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:27,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 225 [2023-12-09 14:55:27,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-09 14:55:47,010 INFO L124 PetriNetUnfolderBase]: 54911/139570 cut-off events. [2023-12-09 14:55:47,011 INFO L125 PetriNetUnfolderBase]: For 33569/33569 co-relation queries the response was YES. [2023-12-09 14:55:48,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224772 conditions, 139570 events. 54911/139570 cut-off events. For 33569/33569 co-relation queries the response was YES. Maximal size of possible extension queue 5731. Compared 1923734 event pairs, 18702 based on Foata normal form. 28264/156618 useless extension candidates. Maximal degree in co-relation 181010. Up to 66293 conditions per place. [2023-12-09 14:55:49,719 INFO L140 encePairwiseOnDemand]: 207/225 looper letters, 54 selfloop transitions, 6 changer transitions 0/237 dead transitions. [2023-12-09 14:55:49,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 237 transitions, 666 flow [2023-12-09 14:55:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-09 14:55:49,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-09 14:55:49,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2023-12-09 14:55:49,722 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.9259259259259259 [2023-12-09 14:55:49,722 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2023-12-09 14:55:49,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2023-12-09 14:55:49,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-09 14:55:49,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2023-12-09 14:55:49,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 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 14:55:49,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 14:55:49,726 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 225.0) internal successors, (900), 4 states have internal predecessors, (900), 0 states have call successors, (0), 0 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 14:55:49,728 INFO L308 CegarLoopForPetriNet]: 225 programPoint places, -4 predicate places. [2023-12-09 14:55:49,728 INFO L500 AbstractCegarLoop]: Abstraction has has 221 places, 237 transitions, 666 flow [2023-12-09 14:55:49,729 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 14:55:49,729 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:49,730 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] [2023-12-09 14:55:49,730 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-09 14:55:49,730 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 14:55:49,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:49,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1097314805, now seen corresponding path program 1 times [2023-12-09 14:55:49,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:49,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58047008] [2023-12-09 14:55:49,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:49,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:49,753 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-09 14:55:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-09 14:55:49,785 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-09 14:55:49,786 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-09 14:55:49,786 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2023-12-09 14:55:49,786 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2023-12-09 14:55:49,786 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2023-12-09 14:55:49,786 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2023-12-09 14:55:49,786 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2023-12-09 14:55:49,786 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2023-12-09 14:55:49,787 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2023-12-09 14:55:49,787 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-09 14:55:49,787 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-12-09 14:55:49,788 WARN L227 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-09 14:55:49,788 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-12-09 14:55:49,837 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-09 14:55:49,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 265 places, 265 transitions, 584 flow [2023-12-09 14:55:50,001 INFO L124 PetriNetUnfolderBase]: 19/341 cut-off events. [2023-12-09 14:55:50,002 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-12-09 14:55:50,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 375 conditions, 341 events. 19/341 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1153 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 307. Up to 14 conditions per place. [2023-12-09 14:55:50,006 INFO L82 GeneralOperation]: Start removeDead. Operand has 265 places, 265 transitions, 584 flow [2023-12-09 14:55:50,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 265 places, 265 transitions, 584 flow [2023-12-09 14:55:50,012 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-09 14:55:50,012 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;@2c63a91d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-09 14:55:50,015 INFO L363 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-12-09 14:55:50,019 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-09 14:55:50,019 INFO L124 PetriNetUnfolderBase]: 2/40 cut-off events. [2023-12-09 14:55:50,019 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-12-09 14:55:50,019 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-09 14:55:50,019 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] [2023-12-09 14:55:50,019 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 14:55:50,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-09 14:55:50,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2138354039, now seen corresponding path program 1 times [2023-12-09 14:55:50,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-09 14:55:50,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791010908] [2023-12-09 14:55:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-09 14:55:50,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-09 14:55:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-09 14:55:50,070 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 14:55:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-09 14:55:50,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791010908] [2023-12-09 14:55:50,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791010908] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-09 14:55:50,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-09 14:55:50,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-09 14:55:50,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204564727] [2023-12-09 14:55:50,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-09 14:55:50,071 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-09 14:55:50,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-09 14:55:50,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-09 14:55:50,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-09 14:55:50,074 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 265 [2023-12-09 14:55:50,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 265 transitions, 584 flow. Second operand has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-09 14:55:50,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-09 14:55:50,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 265 [2023-12-09 14:55:50,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand