/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-wip.dk.datarace-free-lbe-02cf818-m [2023-11-17 15:37:21,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-17 15:37:21,316 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-SemanticLbe.epf [2023-11-17 15:37:21,354 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-17 15:37:21,355 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-17 15:37:21,355 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-17 15:37:21,356 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-17 15:37:21,356 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-17 15:37:21,357 INFO L153 SettingsManager]: * Use SBE=true [2023-11-17 15:37:21,357 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-17 15:37:21,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-17 15:37:21,358 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-17 15:37:21,358 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-17 15:37:21,358 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-17 15:37:21,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-17 15:37:21,359 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-17 15:37:21,359 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-17 15:37:21,360 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-17 15:37:21,360 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-17 15:37:21,360 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-17 15:37:21,361 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-17 15:37:21,361 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-17 15:37:21,361 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-17 15:37:21,362 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-11-17 15:37:21,362 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-17 15:37:21,362 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:21,363 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-17 15:37:21,363 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-17 15:37:21,363 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-17 15:37:21,364 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-17 15:37:21,364 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-17 15:37:21,364 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-17 15:37:21,365 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-11-17 15:37:21,583 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-17 15:37:21,605 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-17 15:37:21,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-17 15:37:21,607 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-17 15:37:21,608 INFO L274 PluginConnector]: CDTParser initialized [2023-11-17 15:37:21,610 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-17 15:37:22,778 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-17 15:37:23,033 INFO L384 CDTParser]: Found 1 translation units. [2023-11-17 15:37:23,034 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_24-sound_lock_racing.i [2023-11-17 15:37:23,052 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3519b51/4185277aa76a46d18015390c16f92370/FLAGbe779f76b [2023-11-17 15:37:23,066 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ba3519b51/4185277aa76a46d18015390c16f92370 [2023-11-17 15:37:23,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-17 15:37:23,069 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-11-17 15:37:23,071 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:23,071 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-17 15:37:23,075 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-17 15:37:23,076 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,077 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@136d2445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23, skipping insertion in model container [2023-11-17 15:37:23,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,130 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-17 15:37:23,390 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_24-sound_lock_racing.i[30176,30189] [2023-11-17 15:37:23,421 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:23,436 INFO L202 MainTranslator]: Completed pre-run [2023-11-17 15:37:23,479 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_24-sound_lock_racing.i[30176,30189] [2023-11-17 15:37:23,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-17 15:37:23,541 INFO L206 MainTranslator]: Completed translation [2023-11-17 15:37:23,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23 WrapperNode [2023-11-17 15:37:23,543 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-17 15:37:23,544 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:23,544 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-17 15:37:23,544 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-17 15:37:23,551 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,589 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,619 INFO L138 Inliner]: procedures = 171, calls = 41, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2023-11-17 15:37:23,619 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-17 15:37:23,620 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-17 15:37:23,620 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-17 15:37:23,620 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-17 15:37:23,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,629 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,647 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,647 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,652 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,655 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,657 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,658 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,660 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-17 15:37:23,674 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-17 15:37:23,674 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-17 15:37:23,674 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-17 15:37:23,675 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (1/1) ... [2023-11-17 15:37:23,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-17 15:37:23,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:23,708 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) [2023-11-17 15:37:23,732 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 [2023-11-17 15:37:23,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-17 15:37:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-17 15:37:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-17 15:37:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-17 15:37:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-17 15:37:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-11-17 15:37:23,742 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-11-17 15:37:23,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-17 15:37:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-17 15:37:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2023-11-17 15:37:23,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-17 15:37:23,743 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-17 15:37:23,744 WARN L211 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-17 15:37:23,861 INFO L239 CfgBuilder]: Building ICFG [2023-11-17 15:37:23,863 INFO L265 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-17 15:37:24,067 INFO L280 CfgBuilder]: Performing block encoding [2023-11-17 15:37:24,102 INFO L302 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-17 15:37:24,103 INFO L307 CfgBuilder]: Removed 10 assume(true) statements. [2023-11-17 15:37:24,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:24 BoogieIcfgContainer [2023-11-17 15:37:24,104 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-17 15:37:24,106 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-17 15:37:24,106 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-17 15:37:24,109 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-17 15:37:24,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.11 03:37:23" (1/3) ... [2023-11-17 15:37:24,110 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bf0ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:24, skipping insertion in model container [2023-11-17 15:37:24,110 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.11 03:37:23" (2/3) ... [2023-11-17 15:37:24,111 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41bf0ef2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.11 03:37:24, skipping insertion in model container [2023-11-17 15:37:24,111 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.11 03:37:24" (3/3) ... [2023-11-17 15:37:24,112 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_24-sound_lock_racing.i [2023-11-17 15:37:24,131 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-17 15:37:24,132 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-17 15:37:24,132 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-17 15:37:24,187 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-11-17 15:37:24,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 123 transitions, 253 flow [2023-11-17 15:37:24,270 INFO L124 PetriNetUnfolderBase]: 18/163 cut-off events. [2023-11-17 15:37:24,270 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-17 15:37:24,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 163 events. 18/163 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 381 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-11-17 15:37:24,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 123 transitions, 253 flow [2023-11-17 15:37:24,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 118 transitions, 240 flow [2023-11-17 15:37:24,285 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:24,303 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 118 transitions, 240 flow [2023-11-17 15:37:24,312 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 118 transitions, 240 flow [2023-11-17 15:37:24,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 118 transitions, 240 flow [2023-11-17 15:37:24,408 INFO L124 PetriNetUnfolderBase]: 17/158 cut-off events. [2023-11-17 15:37:24,412 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:24,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 158 events. 17/158 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 364 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 80. Up to 4 conditions per place. [2023-11-17 15:37:24,418 INFO L119 LiptonReduction]: Number of co-enabled transitions 2852 [2023-11-17 15:37:28,423 INFO L134 LiptonReduction]: Checked pairs total: 4188 [2023-11-17 15:37:28,423 INFO L136 LiptonReduction]: Total number of compositions: 113 [2023-11-17 15:37:28,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:28,444 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@176f5d5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:28,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:28,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:28,449 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:37:28,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:28,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:28,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:28,450 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:28,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:28,455 INFO L85 PathProgramCache]: Analyzing trace with hash 15910582, now seen corresponding path program 1 times [2023-11-17 15:37:28,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:28,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830705701] [2023-11-17 15:37:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:28,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:28,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:28,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:28,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830705701] [2023-11-17 15:37:28,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830705701] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:28,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:28,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:28,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033485716] [2023-11-17 15:37:28,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:28,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:28,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:28,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 236 [2023-11-17 15:37:28,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:28,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:28,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 236 [2023-11-17 15:37:28,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:28,930 INFO L124 PetriNetUnfolderBase]: 83/206 cut-off events. [2023-11-17 15:37:28,931 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:28,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 206 events. 83/206 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 775 event pairs, 21 based on Foata normal form. 9/198 useless extension candidates. Maximal degree in co-relation 387. Up to 112 conditions per place. [2023-11-17 15:37:28,934 INFO L140 encePairwiseOnDemand]: 221/236 looper letters, 17 selfloop transitions, 2 changer transitions 13/34 dead transitions. [2023-11-17 15:37:28,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 34 transitions, 136 flow [2023-11-17 15:37:28,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 329 transitions. [2023-11-17 15:37:28,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4646892655367232 [2023-11-17 15:37:28,954 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 329 transitions. [2023-11-17 15:37:28,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 329 transitions. [2023-11-17 15:37:28,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:28,960 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 329 transitions. [2023-11-17 15:37:28,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:28,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:28,970 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 236.0) internal successors, (944), 4 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:28,972 INFO L175 Difference]: Start difference. First operand has 25 places, 31 transitions, 66 flow. Second operand 3 states and 329 transitions. [2023-11-17 15:37:28,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 34 transitions, 136 flow [2023-11-17 15:37:28,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:28,979 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 48 flow [2023-11-17 15:37:28,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=236, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2023-11-17 15:37:28,988 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-11-17 15:37:28,988 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 48 flow [2023-11-17 15:37:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:28,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:28,989 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-17 15:37:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-17 15:37:28,990 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:28,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:28,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1878445232, now seen corresponding path program 1 times [2023-11-17 15:37:28,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:28,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971070393] [2023-11-17 15:37:28,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:28,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:29,054 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:29,086 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:29,087 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:29,088 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:29,090 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:29,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-17 15:37:29,090 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:37:29,093 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:29,093 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-17 15:37:29,120 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-17 15:37:29,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 156 transitions, 328 flow [2023-11-17 15:37:29,163 INFO L124 PetriNetUnfolderBase]: 32/262 cut-off events. [2023-11-17 15:37:29,163 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:29,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 262 events. 32/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 782 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-11-17 15:37:29,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 141 places, 156 transitions, 328 flow [2023-11-17 15:37:29,170 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 141 places, 156 transitions, 328 flow [2023-11-17 15:37:29,170 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:29,170 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 141 places, 156 transitions, 328 flow [2023-11-17 15:37:29,172 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 141 places, 156 transitions, 328 flow [2023-11-17 15:37:29,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 141 places, 156 transitions, 328 flow [2023-11-17 15:37:29,198 INFO L124 PetriNetUnfolderBase]: 32/262 cut-off events. [2023-11-17 15:37:29,198 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-17 15:37:29,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 262 events. 32/262 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 782 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 165. Up to 8 conditions per place. [2023-11-17 15:37:29,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 8308 [2023-11-17 15:37:33,091 INFO L134 LiptonReduction]: Checked pairs total: 16063 [2023-11-17 15:37:33,092 INFO L136 LiptonReduction]: Total number of compositions: 141 [2023-11-17 15:37:33,094 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:33,095 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@176f5d5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:33,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:33,098 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:33,098 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:37:33,098 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:33,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:33,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:33,099 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:33,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:33,099 INFO L85 PathProgramCache]: Analyzing trace with hash 26058757, now seen corresponding path program 1 times [2023-11-17 15:37:33,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:33,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035590376] [2023-11-17 15:37:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:33,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:33,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035590376] [2023-11-17 15:37:33,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035590376] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:33,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:33,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:33,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358863537] [2023-11-17 15:37:33,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:33,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:33,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:33,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 297 [2023-11-17 15:37:33,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 56 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:33,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:33,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 297 [2023-11-17 15:37:33,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:33,715 INFO L124 PetriNetUnfolderBase]: 3365/5592 cut-off events. [2023-11-17 15:37:33,716 INFO L125 PetriNetUnfolderBase]: For 98/98 co-relation queries the response was YES. [2023-11-17 15:37:33,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11172 conditions, 5592 events. 3365/5592 cut-off events. For 98/98 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 32799 event pairs, 1079 based on Foata normal form. 327/5400 useless extension candidates. Maximal degree in co-relation 8597. Up to 3576 conditions per place. [2023-11-17 15:37:33,735 INFO L140 encePairwiseOnDemand]: 275/297 looper letters, 38 selfloop transitions, 3 changer transitions 29/74 dead transitions. [2023-11-17 15:37:33,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 74 transitions, 313 flow [2023-11-17 15:37:33,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:33,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 424 transitions. [2023-11-17 15:37:33,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47586980920314254 [2023-11-17 15:37:33,738 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 424 transitions. [2023-11-17 15:37:33,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 424 transitions. [2023-11-17 15:37:33,739 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:33,739 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 424 transitions. [2023-11-17 15:37:33,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.33333333333334) internal successors, (424), 3 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:33,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:33,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:33,744 INFO L175 Difference]: Start difference. First operand has 44 places, 56 transitions, 128 flow. Second operand 3 states and 424 transitions. [2023-11-17 15:37:33,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 74 transitions, 313 flow [2023-11-17 15:37:33,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 74 transitions, 313 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:33,750 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 97 flow [2023-11-17 15:37:33,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=97, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-11-17 15:37:33,751 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-11-17 15:37:33,751 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 97 flow [2023-11-17 15:37:33,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:33,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:33,751 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-17 15:37:33,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-17 15:37:33,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:33,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1242005635, now seen corresponding path program 1 times [2023-11-17 15:37:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:33,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091362987] [2023-11-17 15:37:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:33,790 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:33,824 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:33,824 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:33,824 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:33,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:33,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-17 15:37:33,826 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-17 15:37:33,827 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:33,827 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-17 15:37:33,859 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-11-17 15:37:33,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 189 transitions, 405 flow [2023-11-17 15:37:33,913 INFO L124 PetriNetUnfolderBase]: 51/396 cut-off events. [2023-11-17 15:37:33,913 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:33,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 396 events. 51/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1324 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 270. Up to 16 conditions per place. [2023-11-17 15:37:33,916 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 189 transitions, 405 flow [2023-11-17 15:37:33,919 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 189 transitions, 405 flow [2023-11-17 15:37:33,920 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:33,920 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 189 transitions, 405 flow [2023-11-17 15:37:33,920 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 189 transitions, 405 flow [2023-11-17 15:37:33,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 189 transitions, 405 flow [2023-11-17 15:37:33,956 INFO L124 PetriNetUnfolderBase]: 51/396 cut-off events. [2023-11-17 15:37:33,957 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-11-17 15:37:33,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 396 events. 51/396 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1324 event pairs, 1 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 270. Up to 16 conditions per place. [2023-11-17 15:37:33,971 INFO L119 LiptonReduction]: Number of co-enabled transitions 15624 [2023-11-17 15:37:38,297 INFO L134 LiptonReduction]: Checked pairs total: 32161 [2023-11-17 15:37:38,297 INFO L136 LiptonReduction]: Total number of compositions: 165 [2023-11-17 15:37:38,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:38,300 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@176f5d5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:38,300 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:38,303 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:38,303 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:37:38,303 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:38,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:38,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:38,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:38,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:38,304 INFO L85 PathProgramCache]: Analyzing trace with hash 37963670, now seen corresponding path program 1 times [2023-11-17 15:37:38,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:38,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359498916] [2023-11-17 15:37:38,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:38,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:38,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:38,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359498916] [2023-11-17 15:37:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359498916] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:38,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:38,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:38,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080941671] [2023-11-17 15:37:38,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:38,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:38,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:38,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:38,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:38,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 354 [2023-11-17 15:37:38,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 75 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:38,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:38,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 354 [2023-11-17 15:37:38,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:44,580 INFO L124 PetriNetUnfolderBase]: 62246/89013 cut-off events. [2023-11-17 15:37:44,580 INFO L125 PetriNetUnfolderBase]: For 2146/2146 co-relation queries the response was YES. [2023-11-17 15:37:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178001 conditions, 89013 events. 62246/89013 cut-off events. For 2146/2146 co-relation queries the response was YES. Maximal size of possible extension queue 1823. Compared 607018 event pairs, 22949 based on Foata normal form. 6275/89041 useless extension candidates. Maximal degree in co-relation 99434. Up to 60612 conditions per place. [2023-11-17 15:37:44,933 INFO L140 encePairwiseOnDemand]: 324/354 looper letters, 53 selfloop transitions, 4 changer transitions 37/99 dead transitions. [2023-11-17 15:37:44,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 432 flow [2023-11-17 15:37:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-17 15:37:44,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-17 15:37:44,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 505 transitions. [2023-11-17 15:37:44,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4755178907721281 [2023-11-17 15:37:44,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 505 transitions. [2023-11-17 15:37:44,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 505 transitions. [2023-11-17 15:37:44,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:44,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 505 transitions. [2023-11-17 15:37:44,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.33333333333334) internal successors, (505), 3 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:44,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:44,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:44,941 INFO L175 Difference]: Start difference. First operand has 58 places, 75 transitions, 177 flow. Second operand 3 states and 505 transitions. [2023-11-17 15:37:44,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 432 flow [2023-11-17 15:37:44,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 99 transitions, 432 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-17 15:37:44,950 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 138 flow [2023-11-17 15:37:44,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=135, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2023-11-17 15:37:44,952 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-11-17 15:37:44,953 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 138 flow [2023-11-17 15:37:44,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:44,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:44,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-17 15:37:44,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-17 15:37:44,963 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:44,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:44,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1927973539, now seen corresponding path program 1 times [2023-11-17 15:37:44,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:44,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825505856] [2023-11-17 15:37:44,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:44,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:45,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:45,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825505856] [2023-11-17 15:37:45,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825505856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-17 15:37:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8597213] [2023-11-17 15:37:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:45,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-17 15:37:45,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-11-17 15:37:45,061 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) [2023-11-17 15:37:45,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-17 15:37:45,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:45,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-17 15:37:45,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-17 15:37:45,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:45,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-17 15:37:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:45,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8597213] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-17 15:37:45,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-17 15:37:45,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-11-17 15:37:45,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354086753] [2023-11-17 15:37:45,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-17 15:37:45,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-17 15:37:45,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:45,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-17 15:37:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-17 15:37:45,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 354 [2023-11-17 15:37:45,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:45,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:45,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 354 [2023-11-17 15:37:45,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-17 15:37:46,319 INFO L124 PetriNetUnfolderBase]: 8879/14251 cut-off events. [2023-11-17 15:37:46,319 INFO L125 PetriNetUnfolderBase]: For 5427/5427 co-relation queries the response was YES. [2023-11-17 15:37:46,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29451 conditions, 14251 events. 8879/14251 cut-off events. For 5427/5427 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 95803 event pairs, 0 based on Foata normal form. 0/14250 useless extension candidates. Maximal degree in co-relation 19154. Up to 8698 conditions per place. [2023-11-17 15:37:46,429 INFO L140 encePairwiseOnDemand]: 351/354 looper letters, 95 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2023-11-17 15:37:46,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 107 transitions, 481 flow [2023-11-17 15:37:46,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-17 15:37:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-17 15:37:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 866 transitions. [2023-11-17 15:37:46,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077212806026365 [2023-11-17 15:37:46,433 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 866 transitions. [2023-11-17 15:37:46,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 866 transitions. [2023-11-17 15:37:46,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-17 15:37:46,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 866 transitions. [2023-11-17 15:37:46,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 144.33333333333334) internal successors, (866), 6 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:46,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:46,441 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:46,441 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 138 flow. Second operand 6 states and 866 transitions. [2023-11-17 15:37:46,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 107 transitions, 481 flow [2023-11-17 15:37:46,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 107 transitions, 472 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-11-17 15:37:46,449 INFO L231 Difference]: Finished difference. Result has 55 places, 46 transitions, 136 flow [2023-11-17 15:37:46,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=55, PETRI_TRANSITIONS=46} [2023-11-17 15:37:46,451 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2023-11-17 15:37:46,452 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 46 transitions, 136 flow [2023-11-17 15:37:46,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.5) internal successors, (783), 6 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:46,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:46,453 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-11-17 15:37:46,462 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-17 15:37:46,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-17 15:37:46,659 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:46,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash 978391220, now seen corresponding path program 1 times [2023-11-17 15:37:46,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:46,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973548478] [2023-11-17 15:37:46,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:46,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:46,682 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-17 15:37:46,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-17 15:37:46,713 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-17 15:37:46,713 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-17 15:37:46,713 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2023-11-17 15:37:46,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2023-11-17 15:37:46,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-17 15:37:46,714 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-17 15:37:46,715 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-17 15:37:46,715 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-11-17 15:37:46,743 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-11-17 15:37:46,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 222 transitions, 484 flow [2023-11-17 15:37:46,822 INFO L124 PetriNetUnfolderBase]: 82/602 cut-off events. [2023-11-17 15:37:46,822 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:46,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 602 events. 82/602 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2327 event pairs, 6 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-11-17 15:37:46,829 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 222 transitions, 484 flow [2023-11-17 15:37:46,834 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 222 transitions, 484 flow [2023-11-17 15:37:46,834 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2023-11-17 15:37:46,834 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 222 transitions, 484 flow [2023-11-17 15:37:46,835 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 222 transitions, 484 flow [2023-11-17 15:37:46,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 222 transitions, 484 flow [2023-11-17 15:37:47,054 INFO L124 PetriNetUnfolderBase]: 82/602 cut-off events. [2023-11-17 15:37:47,054 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-11-17 15:37:47,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 602 events. 82/602 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2327 event pairs, 6 based on Foata normal form. 0/515 useless extension candidates. Maximal degree in co-relation 416. Up to 32 conditions per place. [2023-11-17 15:37:47,075 INFO L119 LiptonReduction]: Number of co-enabled transitions 25048 [2023-11-17 15:37:51,898 INFO L134 LiptonReduction]: Checked pairs total: 60706 [2023-11-17 15:37:51,898 INFO L136 LiptonReduction]: Total number of compositions: 195 [2023-11-17 15:37:51,900 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-17 15:37:51,900 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@176f5d5b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-17 15:37:51,900 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-17 15:37:51,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-17 15:37:51,902 INFO L124 PetriNetUnfolderBase]: 3/13 cut-off events. [2023-11-17 15:37:51,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-17 15:37:51,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-17 15:37:51,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-11-17 15:37:51,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-17 15:37:51,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-17 15:37:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 51804903, now seen corresponding path program 1 times [2023-11-17 15:37:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-17 15:37:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312530489] [2023-11-17 15:37:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-17 15:37:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-17 15:37:51,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-17 15:37:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-17 15:37:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-17 15:37:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312530489] [2023-11-17 15:37:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312530489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-17 15:37:51,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-17 15:37:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-17 15:37:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737663823] [2023-11-17 15:37:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-17 15:37:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-17 15:37:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-17 15:37:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-17 15:37:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-17 15:37:51,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 417 [2023-11-17 15:37:51,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 94 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 139.33333333333334) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-17 15:37:51,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-17 15:37:51,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 417 [2023-11-17 15:37:51,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand