/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx16000000000 -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/goblint-regression/28-race_reach_36-indirect_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-175f719-m [2023-11-29 19:58:53,266 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 19:58:53,327 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-11-29 19:58:53,352 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 19:58:53,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 19:58:53,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 19:58:53,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 19:58:53,354 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 19:58:53,354 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 19:58:53,357 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 19:58:53,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 19:58:53,357 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 19:58:53,358 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 19:58:53,359 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 19:58:53,360 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 19:58:53,360 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 19:58:53,360 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 19:58:53,361 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-29 19:58:53,361 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 19:58:53,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:58:53,362 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 19:58:53,362 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 19:58:53,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 19:58:53,363 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 19:58:53,363 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 19:58:53,364 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 19:58:53,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 19:58:53,364 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true [2023-11-29 19:58:53,546 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 19:58:53,565 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 19:58:53,567 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 19:58:53,567 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 19:58:53,568 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 19:58:53,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-11-29 19:58:54,598 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 19:58:54,776 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 19:58:54,777 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i [2023-11-29 19:58:54,787 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d33945f1/6d08a0e8713749e0905a2adb13b1d61d/FLAGb8786fb5e [2023-11-29 19:58:54,798 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1d33945f1/6d08a0e8713749e0905a2adb13b1d61d [2023-11-29 19:58:54,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 19:58:54,802 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-29 19:58:54,803 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 19:58:54,803 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 19:58:54,807 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 19:58:54,808 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:58:54" (1/1) ... [2023-11-29 19:58:54,808 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e421ffd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:54, skipping insertion in model container [2023-11-29 19:58:54,809 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:58:54" (1/1) ... [2023-11-29 19:58:54,835 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 19:58:54,997 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2023-11-29 19:58:55,017 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:58:55,028 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 19:58:55,062 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_36-indirect_racefree.i[30176,30189] [2023-11-29 19:58:55,067 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 19:58:55,089 INFO L206 MainTranslator]: Completed translation [2023-11-29 19:58:55,089 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55 WrapperNode [2023-11-29 19:58:55,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 19:58:55,090 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 19:58:55,090 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 19:58:55,090 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 19:58:55,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,106 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,127 INFO L138 Inliner]: procedures = 171, calls = 42, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 87 [2023-11-29 19:58:55,128 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 19:58:55,128 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 19:58:55,128 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 19:58:55,128 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 19:58:55,134 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,134 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,157 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,160 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,161 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 19:58:55,163 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 19:58:55,163 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 19:58:55,163 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 19:58:55,164 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (1/1) ... [2023-11-29 19:58:55,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-29 19:58:55,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:58:55,195 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-29 19:58:55,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-29 19:58:55,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-29 19:58:55,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-29 19:58:55,233 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-29 19:58:55,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 19:58:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 19:58:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-29 19:58:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-29 19:58:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 19:58:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-29 19:58:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-29 19:58:55,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 19:58:55,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 19:58:55,235 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-29 19:58:55,361 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 19:58:55,363 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 19:58:55,512 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 19:58:55,561 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 19:58:55,561 INFO L309 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-29 19:58:55,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:58:55 BoogieIcfgContainer [2023-11-29 19:58:55,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 19:58:55,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 19:58:55,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 19:58:55,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 19:58:55,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:58:54" (1/3) ... [2023-11-29 19:58:55,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e446ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:58:55, skipping insertion in model container [2023-11-29 19:58:55,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:58:55" (2/3) ... [2023-11-29 19:58:55,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e446ed6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:58:55, skipping insertion in model container [2023-11-29 19:58:55,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:58:55" (3/3) ... [2023-11-29 19:58:55,582 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_36-indirect_racefree.i [2023-11-29 19:58:55,594 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 19:58:55,595 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 19:58:55,595 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-29 19:58:55,633 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-29 19:58:55,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 120 transitions, 247 flow [2023-11-29 19:58:55,693 INFO L124 PetriNetUnfolderBase]: 17/162 cut-off events. [2023-11-29 19:58:55,693 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-29 19:58:55,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 162 events. 17/162 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 424 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 82. Up to 4 conditions per place. [2023-11-29 19:58:55,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 111 places, 120 transitions, 247 flow [2023-11-29 19:58:55,701 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 115 transitions, 234 flow [2023-11-29 19:58:55,708 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:58:55,712 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;@50678000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:58:55,712 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:58:55,724 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:58:55,725 INFO L124 PetriNetUnfolderBase]: 5/81 cut-off events. [2023-11-29 19:58:55,725 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:58:55,725 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:58:55,725 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:58:55,726 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:58:55,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:58:55,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1424208841, now seen corresponding path program 1 times [2023-11-29 19:58:55,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:58:55,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453355019] [2023-11-29 19:58:55,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:55,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:58:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:58:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:58:55,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:58:55,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453355019] [2023-11-29 19:58:55,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453355019] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:58:55,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:58:55,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:58:55,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935221751] [2023-11-29 19:58:55,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:58:55,927 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:58:55,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:58:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:58:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:58:55,947 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 120 [2023-11-29 19:58:55,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 115 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:55,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:58:55,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 120 [2023-11-29 19:58:55,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:58:56,074 INFO L124 PetriNetUnfolderBase]: 66/435 cut-off events. [2023-11-29 19:58:56,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:58:56,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 435 events. 66/435 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 2130 event pairs, 6 based on Foata normal form. 69/470 useless extension candidates. Maximal degree in co-relation 541. Up to 132 conditions per place. [2023-11-29 19:58:56,080 INFO L140 encePairwiseOnDemand]: 106/120 looper letters, 23 selfloop transitions, 2 changer transitions 16/111 dead transitions. [2023-11-29 19:58:56,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 111 transitions, 282 flow [2023-11-29 19:58:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:58:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:58:56,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 308 transitions. [2023-11-29 19:58:56,095 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8555555555555555 [2023-11-29 19:58:56,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 308 transitions. [2023-11-29 19:58:56,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 308 transitions. [2023-11-29 19:58:56,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:58:56,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 308 transitions. [2023-11-29 19:58:56,103 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 102.66666666666667) internal successors, (308), 3 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,110 INFO L307 CegarLoopForPetriNet]: 107 programPoint places, 1 predicate places. [2023-11-29 19:58:56,110 INFO L500 AbstractCegarLoop]: Abstraction has has 108 places, 111 transitions, 282 flow [2023-11-29 19:58:56,111 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,111 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:58:56,111 INFO L232 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:58:56,111 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 19:58:56,111 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:58:56,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:58:56,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1086596451, now seen corresponding path program 1 times [2023-11-29 19:58:56,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:58:56,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951345490] [2023-11-29 19:58:56,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:56,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:58:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:58:56,144 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:58:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:58:56,176 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:58:56,177 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:58:56,178 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:58:56,179 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:58:56,179 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 19:58:56,180 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-29 19:58:56,183 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:58:56,183 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-29 19:58:56,209 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-29 19:58:56,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 157 transitions, 330 flow [2023-11-29 19:58:56,239 INFO L124 PetriNetUnfolderBase]: 31/267 cut-off events. [2023-11-29 19:58:56,239 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-29 19:58:56,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279 conditions, 267 events. 31/267 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 862 event pairs, 0 based on Foata normal form. 0/229 useless extension candidates. Maximal degree in co-relation 164. Up to 8 conditions per place. [2023-11-29 19:58:56,242 INFO L82 GeneralOperation]: Start removeDead. Operand has 143 places, 157 transitions, 330 flow [2023-11-29 19:58:56,247 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 157 transitions, 330 flow [2023-11-29 19:58:56,250 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:58:56,251 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;@50678000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:58:56,251 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:58:56,258 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:58:56,258 INFO L124 PetriNetUnfolderBase]: 5/81 cut-off events. [2023-11-29 19:58:56,258 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:58:56,258 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:58:56,258 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:58:56,258 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:58:56,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:58:56,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1659995316, now seen corresponding path program 1 times [2023-11-29 19:58:56,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:58:56,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144959202] [2023-11-29 19:58:56,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:56,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:58:56,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:58:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:58:56,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:58:56,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144959202] [2023-11-29 19:58:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144959202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:58:56,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:58:56,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:58:56,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938173833] [2023-11-29 19:58:56,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:58:56,378 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:58:56,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:58:56,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:58:56,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:58:56,380 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 157 [2023-11-29 19:58:56,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 157 transitions, 330 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:58:56,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 157 [2023-11-29 19:58:56,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:58:56,809 INFO L124 PetriNetUnfolderBase]: 1058/3906 cut-off events. [2023-11-29 19:58:56,810 INFO L125 PetriNetUnfolderBase]: For 104/104 co-relation queries the response was YES. [2023-11-29 19:58:56,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5699 conditions, 3906 events. 1058/3906 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 35058 event pairs, 480 based on Foata normal form. 887/4485 useless extension candidates. Maximal degree in co-relation 724. Up to 1728 conditions per place. [2023-11-29 19:58:56,830 INFO L140 encePairwiseOnDemand]: 137/157 looper letters, 32 selfloop transitions, 2 changer transitions 22/149 dead transitions. [2023-11-29 19:58:56,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 149 transitions, 392 flow [2023-11-29 19:58:56,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:58:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:58:56,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-11-29 19:58:56,833 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8365180467091295 [2023-11-29 19:58:56,833 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-11-29 19:58:56,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-11-29 19:58:56,833 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:58:56,834 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-11-29 19:58:56,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,840 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) [2023-11-29 19:58:56,841 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) [2023-11-29 19:58:56,844 INFO L307 CegarLoopForPetriNet]: 143 programPoint places, 1 predicate places. [2023-11-29 19:58:56,844 INFO L500 AbstractCegarLoop]: Abstraction has has 144 places, 149 transitions, 392 flow [2023-11-29 19:58:56,845 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:56,845 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:58:56,845 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:58:56,845 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 19:58:56,845 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:58:56,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:58:56,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1234999529, now seen corresponding path program 1 times [2023-11-29 19:58:56,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:58:56,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119364669] [2023-11-29 19:58:56,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:56,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:58:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:58:56,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:58:56,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:58:56,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119364669] [2023-11-29 19:58:56,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119364669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:58:56,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497632633] [2023-11-29 19:58:56,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:56,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:58:56,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:58:56,982 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 19:58:56,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 19:58:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:58:57,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:58:57,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:58:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:58:57,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:58:57,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:58:57,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497632633] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:58:57,184 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:58:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:58:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302558808] [2023-11-29 19:58:57,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:58:57,185 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:58:57,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:58:57,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:58:57,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:58:57,188 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 157 [2023-11-29 19:58:57,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 149 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 111.6) internal successors, (1116), 10 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:57,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:58:57,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 157 [2023-11-29 19:58:57,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:58:57,394 INFO L124 PetriNetUnfolderBase]: 492/1266 cut-off events. [2023-11-29 19:58:57,394 INFO L125 PetriNetUnfolderBase]: For 332/632 co-relation queries the response was YES. [2023-11-29 19:58:57,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2902 conditions, 1266 events. 492/1266 cut-off events. For 332/632 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 8211 event pairs, 0 based on Foata normal form. 8/1250 useless extension candidates. Maximal degree in co-relation 383. Up to 754 conditions per place. [2023-11-29 19:58:57,401 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 75 selfloop transitions, 7 changer transitions 0/162 dead transitions. [2023-11-29 19:58:57,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 162 transitions, 658 flow [2023-11-29 19:58:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:58:57,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:58:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1065 transitions. [2023-11-29 19:58:57,404 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7537154989384289 [2023-11-29 19:58:57,404 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1065 transitions. [2023-11-29 19:58:57,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1065 transitions. [2023-11-29 19:58:57,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:58:57,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1065 transitions. [2023-11-29 19:58:57,406 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 118.33333333333333) internal successors, (1065), 9 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:57,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:57,409 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:57,410 INFO L307 CegarLoopForPetriNet]: 143 programPoint places, -27 predicate places. [2023-11-29 19:58:57,411 INFO L500 AbstractCegarLoop]: Abstraction has has 116 places, 162 transitions, 658 flow [2023-11-29 19:58:57,411 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 111.6) internal successors, (1116), 10 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:57,411 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:58:57,412 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:58:57,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 19:58:57,618 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:58:57,619 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:58:57,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:58:57,619 INFO L85 PathProgramCache]: Analyzing trace with hash -1736432953, now seen corresponding path program 1 times [2023-11-29 19:58:57,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:58:57,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270933822] [2023-11-29 19:58:57,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:57,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:58:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:58:57,649 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:58:57,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:58:57,671 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:58:57,671 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:58:57,671 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:58:57,671 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:58:57,672 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 19:58:57,672 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 19:58:57,672 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:58:57,672 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-29 19:58:57,706 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-29 19:58:57,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 194 transitions, 415 flow [2023-11-29 19:58:57,739 INFO L124 PetriNetUnfolderBase]: 50/407 cut-off events. [2023-11-29 19:58:57,739 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-29 19:58:57,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 407 events. 50/407 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1437 event pairs, 1 based on Foata normal form. 0/349 useless extension candidates. Maximal degree in co-relation 275. Up to 16 conditions per place. [2023-11-29 19:58:57,742 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 194 transitions, 415 flow [2023-11-29 19:58:57,745 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 175 places, 194 transitions, 415 flow [2023-11-29 19:58:57,747 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:58:57,750 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;@50678000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:58:57,751 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:58:57,755 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:58:57,755 INFO L124 PetriNetUnfolderBase]: 5/81 cut-off events. [2023-11-29 19:58:57,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:58:57,755 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:58:57,755 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:58:57,755 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:58:57,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:58:57,756 INFO L85 PathProgramCache]: Analyzing trace with hash -957722570, now seen corresponding path program 1 times [2023-11-29 19:58:57,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:58:57,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544902303] [2023-11-29 19:58:57,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:58:57,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:58:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:58:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:58:57,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:58:57,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544902303] [2023-11-29 19:58:57,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544902303] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:58:57,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:58:57,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:58:57,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685088338] [2023-11-29 19:58:57,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:58:57,820 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:58:57,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:58:57,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:58:57,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:58:57,821 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 194 [2023-11-29 19:58:57,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 194 transitions, 415 flow. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:58:57,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:58:57,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 194 [2023-11-29 19:58:57,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:59:01,677 INFO L124 PetriNetUnfolderBase]: 11851/34531 cut-off events. [2023-11-29 19:59:01,677 INFO L125 PetriNetUnfolderBase]: For 877/877 co-relation queries the response was YES. [2023-11-29 19:59:01,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51816 conditions, 34531 events. 11851/34531 cut-off events. For 877/877 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 419890 event pairs, 7555 based on Foata normal form. 9203/42678 useless extension candidates. Maximal degree in co-relation 5993. Up to 16847 conditions per place. [2023-11-29 19:59:01,872 INFO L140 encePairwiseOnDemand]: 168/194 looper letters, 39 selfloop transitions, 2 changer transitions 23/180 dead transitions. [2023-11-29 19:59:01,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 180 transitions, 481 flow [2023-11-29 19:59:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:59:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:59:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-11-29 19:59:01,874 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8195876288659794 [2023-11-29 19:59:01,874 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-11-29 19:59:01,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-11-29 19:59:01,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:59:01,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-11-29 19:59:01,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:01,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:01,876 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 194.0) internal successors, (776), 4 states have internal predecessors, (776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:01,878 INFO L307 CegarLoopForPetriNet]: 175 programPoint places, 1 predicate places. [2023-11-29 19:59:01,878 INFO L500 AbstractCegarLoop]: Abstraction has has 176 places, 180 transitions, 481 flow [2023-11-29 19:59:01,879 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:01,879 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:01,879 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:59:01,879 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 19:59:01,879 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:59:01,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:01,879 INFO L85 PathProgramCache]: Analyzing trace with hash -85656682, now seen corresponding path program 1 times [2023-11-29 19:59:01,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:01,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143529104] [2023-11-29 19:59:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:01,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:01,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:01,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143529104] [2023-11-29 19:59:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143529104] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:59:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262565557] [2023-11-29 19:59:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:01,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:59:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:59:01,955 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 19:59:01,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 19:59:02,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:02,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:59:02,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:59:02,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:02,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:59:02,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:02,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262565557] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:59:02,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:59:02,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:59:02,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204034773] [2023-11-29 19:59:02,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:59:02,078 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:59:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:02,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:59:02,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:59:02,082 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 132 out of 194 [2023-11-29 19:59:02,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 180 transitions, 481 flow. Second operand has 10 states, 10 states have (on average 134.6) internal successors, (1346), 10 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:02,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:02,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 132 of 194 [2023-11-29 19:59:02,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:59:05,223 INFO L124 PetriNetUnfolderBase]: 12227/32033 cut-off events. [2023-11-29 19:59:05,223 INFO L125 PetriNetUnfolderBase]: For 6838/12810 co-relation queries the response was YES. [2023-11-29 19:59:05,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66779 conditions, 32033 events. 12227/32033 cut-off events. For 6838/12810 co-relation queries the response was YES. Maximal size of possible extension queue 824. Compared 359384 event pairs, 905 based on Foata normal form. 7/30011 useless extension candidates. Maximal degree in co-relation 7414. Up to 16943 conditions per place. [2023-11-29 19:59:05,438 INFO L140 encePairwiseOnDemand]: 188/194 looper letters, 106 selfloop transitions, 9 changer transitions 23/253 dead transitions. [2023-11-29 19:59:05,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 253 transitions, 1011 flow [2023-11-29 19:59:05,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 19:59:05,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 19:59:05,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1311 transitions. [2023-11-29 19:59:05,440 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7508591065292096 [2023-11-29 19:59:05,440 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1311 transitions. [2023-11-29 19:59:05,440 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1311 transitions. [2023-11-29 19:59:05,441 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:59:05,441 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1311 transitions. [2023-11-29 19:59:05,443 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 145.66666666666666) internal successors, (1311), 9 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:05,445 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:05,445 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 194.0) internal successors, (1940), 10 states have internal predecessors, (1940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:05,445 INFO L307 CegarLoopForPetriNet]: 175 programPoint places, 9 predicate places. [2023-11-29 19:59:05,445 INFO L500 AbstractCegarLoop]: Abstraction has has 184 places, 253 transitions, 1011 flow [2023-11-29 19:59:05,446 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 134.6) internal successors, (1346), 10 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:05,446 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:05,446 INFO L232 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:59:05,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 19:59:05,651 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 19:59:05,651 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:59:05,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:05,652 INFO L85 PathProgramCache]: Analyzing trace with hash 600024018, now seen corresponding path program 1 times [2023-11-29 19:59:05,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:05,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148938989] [2023-11-29 19:59:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:05,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:05,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:59:05,670 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 19:59:05,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 19:59:05,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 19:59:05,698 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 19:59:05,698 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 19:59:05,698 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 19:59:05,698 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 19:59:05,698 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-29 19:59:05,699 WARN L227 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 19:59:05,699 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-29 19:59:05,725 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-29 19:59:05,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 231 transitions, 502 flow [2023-11-29 19:59:05,768 INFO L124 PetriNetUnfolderBase]: 81/619 cut-off events. [2023-11-29 19:59:05,769 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-29 19:59:05,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 670 conditions, 619 events. 81/619 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2503 event pairs, 6 based on Foata normal form. 0/533 useless extension candidates. Maximal degree in co-relation 427. Up to 32 conditions per place. [2023-11-29 19:59:05,774 INFO L82 GeneralOperation]: Start removeDead. Operand has 207 places, 231 transitions, 502 flow [2023-11-29 19:59:05,776 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 231 transitions, 502 flow [2023-11-29 19:59:05,777 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 19:59:05,778 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;@50678000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 19:59:05,778 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 19:59:05,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 19:59:05,780 INFO L124 PetriNetUnfolderBase]: 5/82 cut-off events. [2023-11-29 19:59:05,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 19:59:05,781 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:05,781 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:59:05,781 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:59:05,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:05,781 INFO L85 PathProgramCache]: Analyzing trace with hash -687427907, now seen corresponding path program 1 times [2023-11-29 19:59:05,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:05,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745839853] [2023-11-29 19:59:05,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:05,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:05,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:05,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:05,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745839853] [2023-11-29 19:59:05,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745839853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 19:59:05,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 19:59:05,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 19:59:05,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689356525] [2023-11-29 19:59:05,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 19:59:05,820 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 19:59:05,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:05,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 19:59:05,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 19:59:05,821 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 231 [2023-11-29 19:59:05,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 231 transitions, 502 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:05,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:05,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 231 [2023-11-29 19:59:05,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 19:59:38,462 INFO L124 PetriNetUnfolderBase]: 116073/285061 cut-off events. [2023-11-29 19:59:38,462 INFO L125 PetriNetUnfolderBase]: For 11989/11989 co-relation queries the response was YES. [2023-11-29 19:59:40,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 441745 conditions, 285061 events. 116073/285061 cut-off events. For 11989/11989 co-relation queries the response was YES. Maximal size of possible extension queue 6082. Compared 4108520 event pairs, 84882 based on Foata normal form. 87197/364970 useless extension candidates. Maximal degree in co-relation 52659. Up to 152541 conditions per place. [2023-11-29 19:59:40,896 INFO L140 encePairwiseOnDemand]: 199/231 looper letters, 46 selfloop transitions, 2 changer transitions 24/211 dead transitions. [2023-11-29 19:59:40,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 211 transitions, 572 flow [2023-11-29 19:59:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 19:59:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-29 19:59:40,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-11-29 19:59:40,899 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.8080808080808081 [2023-11-29 19:59:40,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-11-29 19:59:40,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-11-29 19:59:40,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 19:59:40,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-11-29 19:59:40,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:40,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:40,901 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 231.0) internal successors, (924), 4 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:40,902 INFO L307 CegarLoopForPetriNet]: 207 programPoint places, 1 predicate places. [2023-11-29 19:59:40,902 INFO L500 AbstractCegarLoop]: Abstraction has has 208 places, 211 transitions, 572 flow [2023-11-29 19:59:40,902 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:40,902 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 19:59:40,902 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 19:59:40,902 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 19:59:40,903 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 19:59:40,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 19:59:40,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1031235578, now seen corresponding path program 1 times [2023-11-29 19:59:40,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 19:59:40,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790657212] [2023-11-29 19:59:40,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 19:59:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:40,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 19:59:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790657212] [2023-11-29 19:59:40,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790657212] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 19:59:40,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664296297] [2023-11-29 19:59:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 19:59:40,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 19:59:40,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 19:59:40,943 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 19:59:40,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 19:59:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 19:59:41,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 19:59:41,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 19:59:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:41,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 19:59:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 19:59:41,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664296297] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 19:59:41,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 19:59:41,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-29 19:59:41,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045752452] [2023-11-29 19:59:41,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 19:59:41,082 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 19:59:41,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 19:59:41,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 19:59:41,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-29 19:59:41,083 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 231 [2023-11-29 19:59:41,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 211 transitions, 572 flow. Second operand has 10 states, 10 states have (on average 157.6) internal successors, (1576), 10 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 19:59:41,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 19:59:41,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 231 [2023-11-29 19:59:41,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 20:00:10,827 INFO L124 PetriNetUnfolderBase]: 124548/286510 cut-off events. [2023-11-29 20:00:10,828 INFO L125 PetriNetUnfolderBase]: For 52078/79344 co-relation queries the response was YES. [2023-11-29 20:00:12,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614227 conditions, 286510 events. 124548/286510 cut-off events. For 52078/79344 co-relation queries the response was YES. Maximal size of possible extension queue 5985. Compared 3931780 event pairs, 15472 based on Foata normal form. 7/271986 useless extension candidates. Maximal degree in co-relation 71203. Up to 160442 conditions per place. [2023-11-29 20:00:13,674 INFO L140 encePairwiseOnDemand]: 225/231 looper letters, 119 selfloop transitions, 9 changer transitions 24/290 dead transitions. [2023-11-29 20:00:13,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 290 transitions, 1154 flow [2023-11-29 20:00:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 20:00:13,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-11-29 20:00:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1532 transitions. [2023-11-29 20:00:13,694 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7368927368927369 [2023-11-29 20:00:13,695 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1532 transitions. [2023-11-29 20:00:13,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1532 transitions. [2023-11-29 20:00:13,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 20:00:13,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1532 transitions. [2023-11-29 20:00:13,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 170.22222222222223) internal successors, (1532), 9 states have internal predecessors, (1532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:13,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:13,706 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 231.0) internal successors, (2310), 10 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:13,707 INFO L307 CegarLoopForPetriNet]: 207 programPoint places, 9 predicate places. [2023-11-29 20:00:13,707 INFO L500 AbstractCegarLoop]: Abstraction has has 216 places, 290 transitions, 1154 flow [2023-11-29 20:00:13,708 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 157.6) internal successors, (1576), 10 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:13,708 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 20:00:13,708 INFO L232 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 20:00:13,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 20:00:13,912 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 20:00:13,912 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 20:00:13,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 20:00:13,928 INFO L85 PathProgramCache]: Analyzing trace with hash -371917487, now seen corresponding path program 1 times [2023-11-29 20:00:13,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 20:00:13,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210883638] [2023-11-29 20:00:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:13,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 20:00:13,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 20:00:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 20:00:14,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 20:00:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210883638] [2023-11-29 20:00:14,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210883638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 20:00:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255215522] [2023-11-29 20:00:14,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:14,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 20:00:14,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-29 20:00:14,040 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 20:00:14,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 20:00:14,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 20:00:14,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 20:00:14,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 20:00:14,208 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 20:00:14,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 20:00:14,294 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 20:00:14,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255215522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 20:00:14,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 20:00:14,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-29 20:00:14,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331207873] [2023-11-29 20:00:14,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 20:00:14,295 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 20:00:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 20:00:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 20:00:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2023-11-29 20:00:14,297 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 231 [2023-11-29 20:00:14,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 290 transitions, 1154 flow. Second operand has 18 states, 18 states have (on average 157.77777777777777) internal successors, (2840), 18 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:14,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 20:00:14,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 231 [2023-11-29 20:00:14,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-29 20:00:24,226 INFO L124 PetriNetUnfolderBase]: 52824/93397 cut-off events. [2023-11-29 20:00:24,227 INFO L125 PetriNetUnfolderBase]: For 54505/85525 co-relation queries the response was YES. [2023-11-29 20:00:24,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301423 conditions, 93397 events. 52824/93397 cut-off events. For 54505/85525 co-relation queries the response was YES. Maximal size of possible extension queue 2398. Compared 934222 event pairs, 279 based on Foata normal form. 2333/95584 useless extension candidates. Maximal degree in co-relation 35247. Up to 66806 conditions per place. [2023-11-29 20:00:25,477 INFO L140 encePairwiseOnDemand]: 226/231 looper letters, 261 selfloop transitions, 13 changer transitions 0/400 dead transitions. [2023-11-29 20:00:25,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 400 transitions, 2464 flow [2023-11-29 20:00:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 20:00:25,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-11-29 20:00:25,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2559 transitions. [2023-11-29 20:00:25,487 INFO L542 CegarLoopForPetriNet]: DFA transition density 0.7385281385281385 [2023-11-29 20:00:25,487 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2559 transitions. [2023-11-29 20:00:25,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2559 transitions. [2023-11-29 20:00:25,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-29 20:00:25,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2559 transitions. [2023-11-29 20:00:25,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 170.6) internal successors, (2559), 15 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:25,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 231.0) internal successors, (3696), 16 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:25,497 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 231.0) internal successors, (3696), 16 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:25,498 INFO L307 CegarLoopForPetriNet]: 207 programPoint places, -13 predicate places. [2023-11-29 20:00:25,498 INFO L500 AbstractCegarLoop]: Abstraction has has 194 places, 400 transitions, 2464 flow [2023-11-29 20:00:25,499 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 157.77777777777777) internal successors, (2840), 18 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:25,499 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 20:00:25,499 INFO L232 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 20:00:25,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 20:00:25,704 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 20:00:25,705 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 20:00:25,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 20:00:25,705 INFO L85 PathProgramCache]: Analyzing trace with hash 135389540, now seen corresponding path program 1 times [2023-11-29 20:00:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 20:00:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203111731] [2023-11-29 20:00:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:25,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 20:00:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 20:00:25,717 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-29 20:00:25,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-29 20:00:25,733 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-29 20:00:25,734 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-11-29 20:00:25,734 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-29 20:00:25,734 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-29 20:00:25,734 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 20:00:25,735 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-11-29 20:00:25,735 WARN L227 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-29 20:00:25,735 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-11-29 20:00:25,758 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-11-29 20:00:25,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 268 transitions, 591 flow [2023-11-29 20:00:25,837 INFO L124 PetriNetUnfolderBase]: 140/979 cut-off events. [2023-11-29 20:00:25,838 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-11-29 20:00:25,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1085 conditions, 979 events. 140/979 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4576 event pairs, 23 based on Foata normal form. 0/849 useless extension candidates. Maximal degree in co-relation 664. Up to 80 conditions per place. [2023-11-29 20:00:25,848 INFO L82 GeneralOperation]: Start removeDead. Operand has 239 places, 268 transitions, 591 flow [2023-11-29 20:00:25,852 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 239 places, 268 transitions, 591 flow [2023-11-29 20:00:25,853 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 20:00:25,853 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;@50678000, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 20:00:25,853 INFO L363 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-29 20:00:25,856 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-29 20:00:25,856 INFO L124 PetriNetUnfolderBase]: 5/82 cut-off events. [2023-11-29 20:00:25,856 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-29 20:00:25,856 INFO L224 CegarLoopForPetriNet]: Found error trace [2023-11-29 20:00:25,856 INFO L232 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 20:00:25,856 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-29 20:00:25,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 20:00:25,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1824087991, now seen corresponding path program 1 times [2023-11-29 20:00:25,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 20:00:25,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701844280] [2023-11-29 20:00:25,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 20:00:25,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 20:00:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 20:00:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 20:00:25,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 20:00:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701844280] [2023-11-29 20:00:25,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701844280] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 20:00:25,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 20:00:25,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 20:00:25,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981503297] [2023-11-29 20:00:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 20:00:25,874 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 20:00:25,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 20:00:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 20:00:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 20:00:25,875 INFO L497 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 268 [2023-11-29 20:00:25,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 268 transitions, 591 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 20:00:25,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-29 20:00:25,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 268 [2023-11-29 20:00:25,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand