/usr/bin/java -Xmx16000000000 -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-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.data.races.in.concurrent.programs true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-25 18:23:07,335 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-25 18:23:07,410 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-VariableLbe.epf [2023-08-25 18:23:07,415 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-25 18:23:07,416 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-25 18:23:07,452 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-25 18:23:07,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-25 18:23:07,454 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-25 18:23:07,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-25 18:23:07,458 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-25 18:23:07,458 INFO L153 SettingsManager]: * Use SBE=true [2023-08-25 18:23:07,458 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-25 18:23:07,459 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-25 18:23:07,460 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-25 18:23:07,460 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-25 18:23:07,460 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-25 18:23:07,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-25 18:23:07,461 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-25 18:23:07,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-25 18:23:07,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-25 18:23:07,461 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-25 18:23:07,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-25 18:23:07,462 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-25 18:23:07,462 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-25 18:23:07,463 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-25 18:23:07,463 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-25 18:23:07,463 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-25 18:23:07,463 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:23:07,464 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-25 18:23:07,464 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-25 18:23:07,465 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-25 18:23:07,465 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-25 18:23:07,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-25 18:23:07,465 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-25 18:23:07,466 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-25 18:23:07,466 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of data races in concurrent programs -> true [2023-08-25 18:23:07,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-25 18:23:07,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-25 18:23:07,837 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-25 18:23:07,838 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-25 18:23:07,838 INFO L274 PluginConnector]: CDTParser initialized [2023-08-25 18:23:07,840 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-25 18:23:09,066 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-25 18:23:09,334 INFO L384 CDTParser]: Found 1 translation units. [2023-08-25 18:23:09,335 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_79-equ_racefree.i [2023-08-25 18:23:09,349 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb9de7015/afe54b475f0f48cf814f8177d65c90a1/FLAG3954eb54e [2023-08-25 18:23:09,362 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fb9de7015/afe54b475f0f48cf814f8177d65c90a1 [2023-08-25 18:23:09,364 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-25 18:23:09,365 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-25 18:23:09,366 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-25 18:23:09,366 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-25 18:23:09,369 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-25 18:23:09,369 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:23:09" (1/1) ... [2023-08-25 18:23:09,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dd0a03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:09, skipping insertion in model container [2023-08-25 18:23:09,370 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 06:23:09" (1/1) ... [2023-08-25 18:23:09,406 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-25 18:23:09,863 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:23:09,879 INFO L201 MainTranslator]: Completed pre-run [2023-08-25 18:23:09,906 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:23:09,907 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-25 18:23:09,950 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-25 18:23:10,020 INFO L206 MainTranslator]: Completed translation [2023-08-25 18:23:10,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10 WrapperNode [2023-08-25 18:23:10,021 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-25 18:23:10,022 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-25 18:23:10,022 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-25 18:23:10,022 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-25 18:23:10,028 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,106 INFO L138 Inliner]: procedures = 271, calls = 57, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 275 [2023-08-25 18:23:10,107 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-25 18:23:10,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-25 18:23:10,108 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-25 18:23:10,108 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-25 18:23:10,117 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,117 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,140 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,141 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,174 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,175 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-25 18:23:10,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-25 18:23:10,179 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-25 18:23:10,179 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-25 18:23:10,180 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (1/1) ... [2023-08-25 18:23:10,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-25 18:23:10,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-25 18:23:10,207 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) [2023-08-25 18:23:10,212 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 [2023-08-25 18:23:10,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-25 18:23:10,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-25 18:23:10,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-25 18:23:10,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-25 18:23:10,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-25 18:23:10,248 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-25 18:23:10,363 INFO L236 CfgBuilder]: Building ICFG [2023-08-25 18:23:10,365 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-25 18:23:10,702 INFO L277 CfgBuilder]: Performing block encoding [2023-08-25 18:23:10,709 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-25 18:23:10,709 INFO L302 CfgBuilder]: Removed 22 assume(true) statements. [2023-08-25 18:23:10,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:23:10 BoogieIcfgContainer [2023-08-25 18:23:10,712 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-25 18:23:10,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-25 18:23:10,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-25 18:23:10,716 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-25 18:23:10,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 06:23:09" (1/3) ... [2023-08-25 18:23:10,717 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724cd1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:23:10, skipping insertion in model container [2023-08-25 18:23:10,717 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 06:23:10" (2/3) ... [2023-08-25 18:23:10,718 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724cd1b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 06:23:10, skipping insertion in model container [2023-08-25 18:23:10,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 06:23:10" (3/3) ... [2023-08-25 18:23:10,719 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_79-equ_racefree.i [2023-08-25 18:23:10,734 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-25 18:23:10,734 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-25 18:23:10,735 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-25 18:23:10,812 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-25 18:23:10,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 285 transitions, 578 flow [2023-08-25 18:23:11,068 INFO L124 PetriNetUnfolderBase]: 46/401 cut-off events. [2023-08-25 18:23:11,068 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-25 18:23:11,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 401 events. 46/401 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1627 event pairs, 0 based on Foata normal form. 0/332 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-25 18:23:11,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 257 places, 285 transitions, 578 flow [2023-08-25 18:23:11,093 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 278 transitions, 561 flow [2023-08-25 18:23:11,097 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:11,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 252 places, 278 transitions, 561 flow [2023-08-25 18:23:11,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 252 places, 278 transitions, 561 flow [2023-08-25 18:23:11,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 278 transitions, 561 flow [2023-08-25 18:23:11,196 INFO L124 PetriNetUnfolderBase]: 44/394 cut-off events. [2023-08-25 18:23:11,196 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:23:11,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 399 conditions, 394 events. 44/394 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1605 event pairs, 0 based on Foata normal form. 0/326 useless extension candidates. Maximal degree in co-relation 216. Up to 8 conditions per place. [2023-08-25 18:23:11,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 23180 [2023-08-25 18:23:18,928 INFO L134 LiptonReduction]: Checked pairs total: 120734 [2023-08-25 18:23:18,928 INFO L136 LiptonReduction]: Total number of compositions: 189 [2023-08-25 18:23:18,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:18,945 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:18,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:18,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:18,950 INFO L124 PetriNetUnfolderBase]: 8/35 cut-off events. [2023-08-25 18:23:18,950 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-25 18:23:18,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:18,951 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-25 18:23:18,951 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:18,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:18,955 INFO L85 PathProgramCache]: Analyzing trace with hash -348266882, now seen corresponding path program 1 times [2023-08-25 18:23:18,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:18,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446597488] [2023-08-25 18:23:18,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:19,079 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:19,126 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:19,127 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:19,128 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:19,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-25 18:23:19,133 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:23:19,139 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:19,140 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:19,140 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-25 18:23:19,196 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-25 18:23:19,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 342 places, 382 transitions, 782 flow [2023-08-25 18:23:19,303 INFO L124 PetriNetUnfolderBase]: 77/645 cut-off events. [2023-08-25 18:23:19,303 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:23:19,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 645 events. 77/645 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3228 event pairs, 0 based on Foata normal form. 0/530 useless extension candidates. Maximal degree in co-relation 403. Up to 12 conditions per place. [2023-08-25 18:23:19,313 INFO L82 GeneralOperation]: Start removeDead. Operand has 342 places, 382 transitions, 782 flow [2023-08-25 18:23:19,318 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 341 places, 380 transitions, 778 flow [2023-08-25 18:23:19,319 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:19,319 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 341 places, 380 transitions, 778 flow [2023-08-25 18:23:19,319 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 341 places, 380 transitions, 778 flow [2023-08-25 18:23:19,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 341 places, 380 transitions, 778 flow [2023-08-25 18:23:19,414 INFO L124 PetriNetUnfolderBase]: 76/643 cut-off events. [2023-08-25 18:23:19,414 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-25 18:23:19,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 643 events. 76/643 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3256 event pairs, 0 based on Foata normal form. 0/529 useless extension candidates. Maximal degree in co-relation 401. Up to 12 conditions per place. [2023-08-25 18:23:19,454 INFO L119 LiptonReduction]: Number of co-enabled transitions 66500 [2023-08-25 18:23:25,861 INFO L134 LiptonReduction]: Checked pairs total: 323155 [2023-08-25 18:23:25,861 INFO L136 LiptonReduction]: Total number of compositions: 244 [2023-08-25 18:23:25,863 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:25,864 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:25,864 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:25,874 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:25,874 INFO L124 PetriNetUnfolderBase]: 24/124 cut-off events. [2023-08-25 18:23:25,874 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-25 18:23:25,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:25,875 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-25 18:23:25,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:25,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash -872469948, now seen corresponding path program 1 times [2023-08-25 18:23:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:25,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355655133] [2023-08-25 18:23:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:25,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:25,909 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:25,944 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:25,945 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:25,945 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:25,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-25 18:23:25,945 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:23:25,946 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:25,946 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:25,946 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-25 18:23:25,993 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-25 18:23:25,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 479 transitions, 988 flow [2023-08-25 18:23:26,201 INFO L124 PetriNetUnfolderBase]: 113/934 cut-off events. [2023-08-25 18:23:26,201 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:23:26,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 962 conditions, 934 events. 113/934 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5136 event pairs, 1 based on Foata normal form. 0/767 useless extension candidates. Maximal degree in co-relation 653. Up to 16 conditions per place. [2023-08-25 18:23:26,216 INFO L82 GeneralOperation]: Start removeDead. Operand has 427 places, 479 transitions, 988 flow [2023-08-25 18:23:26,224 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 426 places, 477 transitions, 984 flow [2023-08-25 18:23:26,224 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:26,225 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 426 places, 477 transitions, 984 flow [2023-08-25 18:23:26,225 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 426 places, 477 transitions, 984 flow [2023-08-25 18:23:26,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 426 places, 477 transitions, 984 flow [2023-08-25 18:23:26,417 INFO L124 PetriNetUnfolderBase]: 112/932 cut-off events. [2023-08-25 18:23:26,417 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:23:26,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 932 events. 112/932 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 5158 event pairs, 1 based on Foata normal form. 0/766 useless extension candidates. Maximal degree in co-relation 651. Up to 16 conditions per place. [2023-08-25 18:23:26,486 INFO L119 LiptonReduction]: Number of co-enabled transitions 127680 [2023-08-25 18:23:32,514 INFO L134 LiptonReduction]: Checked pairs total: 628274 [2023-08-25 18:23:32,514 INFO L136 LiptonReduction]: Total number of compositions: 289 [2023-08-25 18:23:32,516 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:32,517 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:32,517 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:32,536 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:32,536 INFO L124 PetriNetUnfolderBase]: 37/227 cut-off events. [2023-08-25 18:23:32,536 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2023-08-25 18:23:32,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:32,536 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-25 18:23:32,537 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:32,537 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:32,537 INFO L85 PathProgramCache]: Analyzing trace with hash 708882056, now seen corresponding path program 1 times [2023-08-25 18:23:32,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:32,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284599253] [2023-08-25 18:23:32,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:32,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:32,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:32,566 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:32,594 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:32,595 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:32,595 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-25 18:23:32,595 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:23:32,596 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:32,596 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:32,596 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-25 18:23:32,633 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-25 18:23:32,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 512 places, 576 transitions, 1196 flow [2023-08-25 18:23:32,905 INFO L124 PetriNetUnfolderBase]: 161/1315 cut-off events. [2023-08-25 18:23:32,907 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:23:32,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1370 conditions, 1315 events. 161/1315 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7689 event pairs, 6 based on Foata normal form. 0/1084 useless extension candidates. Maximal degree in co-relation 954. Up to 32 conditions per place. [2023-08-25 18:23:32,945 INFO L82 GeneralOperation]: Start removeDead. Operand has 512 places, 576 transitions, 1196 flow [2023-08-25 18:23:32,967 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 511 places, 574 transitions, 1192 flow [2023-08-25 18:23:32,967 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:32,967 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 511 places, 574 transitions, 1192 flow [2023-08-25 18:23:32,968 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 511 places, 574 transitions, 1192 flow [2023-08-25 18:23:32,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 511 places, 574 transitions, 1192 flow [2023-08-25 18:23:33,227 INFO L124 PetriNetUnfolderBase]: 160/1313 cut-off events. [2023-08-25 18:23:33,227 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-25 18:23:33,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 1313 events. 160/1313 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 7667 event pairs, 6 based on Foata normal form. 0/1083 useless extension candidates. Maximal degree in co-relation 952. Up to 32 conditions per place. [2023-08-25 18:23:33,327 INFO L119 LiptonReduction]: Number of co-enabled transitions 207480 [2023-08-25 18:23:39,943 INFO L134 LiptonReduction]: Checked pairs total: 1044797 [2023-08-25 18:23:39,943 INFO L136 LiptonReduction]: Total number of compositions: 353 [2023-08-25 18:23:39,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:39,946 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:39,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:39,974 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:39,975 INFO L124 PetriNetUnfolderBase]: 58/353 cut-off events. [2023-08-25 18:23:39,975 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-25 18:23:39,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:39,975 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:39,975 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:39,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:39,976 INFO L85 PathProgramCache]: Analyzing trace with hash 320880082, now seen corresponding path program 1 times [2023-08-25 18:23:39,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:39,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754433802] [2023-08-25 18:23:39,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:39,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:40,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:40,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:40,043 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:40,043 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:40,043 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:40,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-25 18:23:40,044 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:23:40,046 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:40,046 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:40,046 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-25 18:23:40,110 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-25 18:23:40,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 597 places, 673 transitions, 1406 flow [2023-08-25 18:23:40,543 INFO L124 PetriNetUnfolderBase]: 237/1884 cut-off events. [2023-08-25 18:23:40,543 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:23:40,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1995 conditions, 1884 events. 237/1884 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11655 event pairs, 23 based on Foata normal form. 0/1565 useless extension candidates. Maximal degree in co-relation 1360. Up to 80 conditions per place. [2023-08-25 18:23:40,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 597 places, 673 transitions, 1406 flow [2023-08-25 18:23:40,619 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 596 places, 671 transitions, 1402 flow [2023-08-25 18:23:40,619 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:40,619 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 596 places, 671 transitions, 1402 flow [2023-08-25 18:23:40,619 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 596 places, 671 transitions, 1402 flow [2023-08-25 18:23:40,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 596 places, 671 transitions, 1402 flow [2023-08-25 18:23:41,027 INFO L124 PetriNetUnfolderBase]: 236/1882 cut-off events. [2023-08-25 18:23:41,028 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-25 18:23:41,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1993 conditions, 1882 events. 236/1882 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 11611 event pairs, 23 based on Foata normal form. 0/1564 useless extension candidates. Maximal degree in co-relation 1358. Up to 80 conditions per place. [2023-08-25 18:23:41,183 INFO L119 LiptonReduction]: Number of co-enabled transitions 305900 [2023-08-25 18:23:48,128 INFO L134 LiptonReduction]: Checked pairs total: 1535530 [2023-08-25 18:23:48,128 INFO L136 LiptonReduction]: Total number of compositions: 393 [2023-08-25 18:23:48,130 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:48,131 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:48,131 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:48,172 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:48,172 INFO L124 PetriNetUnfolderBase]: 80/489 cut-off events. [2023-08-25 18:23:48,172 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-25 18:23:48,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:48,173 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:48,173 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:48,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1295985743, now seen corresponding path program 1 times [2023-08-25 18:23:48,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:48,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417241554] [2023-08-25 18:23:48,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:48,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:48,199 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:48,231 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:48,232 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:48,232 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:48,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-25 18:23:48,232 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:23:48,233 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:48,233 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:48,233 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-25 18:23:48,286 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-25 18:23:48,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 682 places, 770 transitions, 1618 flow [2023-08-25 18:23:49,088 INFO L124 PetriNetUnfolderBase]: 377/2837 cut-off events. [2023-08-25 18:23:49,088 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:23:49,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3069 conditions, 2837 events. 377/2837 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 19305 event pairs, 72 based on Foata normal form. 0/2382 useless extension candidates. Maximal degree in co-relation 1983. Up to 192 conditions per place. [2023-08-25 18:23:49,222 INFO L82 GeneralOperation]: Start removeDead. Operand has 682 places, 770 transitions, 1618 flow [2023-08-25 18:23:49,264 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 681 places, 768 transitions, 1614 flow [2023-08-25 18:23:49,264 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:23:49,264 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 681 places, 768 transitions, 1614 flow [2023-08-25 18:23:49,265 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 681 places, 768 transitions, 1614 flow [2023-08-25 18:23:49,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 681 places, 768 transitions, 1614 flow [2023-08-25 18:23:49,938 INFO L124 PetriNetUnfolderBase]: 376/2835 cut-off events. [2023-08-25 18:23:49,938 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-25 18:23:50,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3067 conditions, 2835 events. 376/2835 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 19331 event pairs, 72 based on Foata normal form. 0/2381 useless extension candidates. Maximal degree in co-relation 1981. Up to 192 conditions per place. [2023-08-25 18:23:50,347 INFO L119 LiptonReduction]: Number of co-enabled transitions 422940 [2023-08-25 18:23:59,725 INFO L134 LiptonReduction]: Checked pairs total: 2365174 [2023-08-25 18:23:59,726 INFO L136 LiptonReduction]: Total number of compositions: 458 [2023-08-25 18:23:59,728 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:23:59,728 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:23:59,728 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:23:59,799 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:23:59,799 INFO L124 PetriNetUnfolderBase]: 102/631 cut-off events. [2023-08-25 18:23:59,799 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-25 18:23:59,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:23:59,799 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:23:59,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:23:59,800 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:23:59,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1992168685, now seen corresponding path program 1 times [2023-08-25 18:23:59,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:23:59,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660098674] [2023-08-25 18:23:59,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:23:59,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:23:59,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:59,844 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:23:59,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:23:59,883 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:23:59,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:23:59,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:23:59,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-25 18:23:59,884 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:23:59,884 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:23:59,885 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:23:59,885 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-25 18:23:59,935 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-25 18:23:59,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 767 places, 867 transitions, 1832 flow [2023-08-25 18:24:01,465 INFO L124 PetriNetUnfolderBase]: 661/4574 cut-off events. [2023-08-25 18:24:01,466 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:24:01,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5072 conditions, 4574 events. 661/4574 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 35098 event pairs, 201 based on Foata normal form. 0/3887 useless extension candidates. Maximal degree in co-relation 3055. Up to 448 conditions per place. [2023-08-25 18:24:01,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 767 places, 867 transitions, 1832 flow [2023-08-25 18:24:01,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 766 places, 865 transitions, 1828 flow [2023-08-25 18:24:01,646 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:24:01,646 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 766 places, 865 transitions, 1828 flow [2023-08-25 18:24:01,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 766 places, 865 transitions, 1828 flow [2023-08-25 18:24:01,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 766 places, 865 transitions, 1828 flow [2023-08-25 18:24:02,932 INFO L124 PetriNetUnfolderBase]: 660/4572 cut-off events. [2023-08-25 18:24:02,933 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-25 18:24:03,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5070 conditions, 4572 events. 660/4572 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 35052 event pairs, 201 based on Foata normal form. 0/3886 useless extension candidates. Maximal degree in co-relation 3053. Up to 448 conditions per place. [2023-08-25 18:24:03,373 INFO L119 LiptonReduction]: Number of co-enabled transitions 558600 [2023-08-25 18:24:11,624 INFO L134 LiptonReduction]: Checked pairs total: 3149861 [2023-08-25 18:24:11,624 INFO L136 LiptonReduction]: Total number of compositions: 520 [2023-08-25 18:24:11,626 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:24:11,626 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:24:11,626 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:24:11,704 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:24:11,705 INFO L124 PetriNetUnfolderBase]: 128/790 cut-off events. [2023-08-25 18:24:11,705 INFO L125 PetriNetUnfolderBase]: For 93/93 co-relation queries the response was YES. [2023-08-25 18:24:11,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:24:11,705 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:24:11,705 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:24:11,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:24:11,706 INFO L85 PathProgramCache]: Analyzing trace with hash -545592822, now seen corresponding path program 1 times [2023-08-25 18:24:11,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:24:11,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101965903] [2023-08-25 18:24:11,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:24:11,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:24:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:24:11,728 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:24:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:24:11,751 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:24:11,751 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:24:11,751 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:24:11,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-25 18:24:11,751 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:24:11,752 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:24:11,752 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:24:11,752 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-25 18:24:11,806 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-25 18:24:11,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 852 places, 964 transitions, 2048 flow [2023-08-25 18:24:14,508 INFO L124 PetriNetUnfolderBase]: 1265/7911 cut-off events. [2023-08-25 18:24:14,508 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:24:14,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8996 conditions, 7911 events. 1265/7911 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 69689 event pairs, 522 based on Foata normal form. 0/6800 useless extension candidates. Maximal degree in co-relation 5056. Up to 1024 conditions per place. [2023-08-25 18:24:14,781 INFO L82 GeneralOperation]: Start removeDead. Operand has 852 places, 964 transitions, 2048 flow [2023-08-25 18:24:14,868 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 851 places, 962 transitions, 2044 flow [2023-08-25 18:24:14,869 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:24:14,869 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 851 places, 962 transitions, 2044 flow [2023-08-25 18:24:14,869 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 851 places, 962 transitions, 2044 flow [2023-08-25 18:24:14,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 851 places, 962 transitions, 2044 flow [2023-08-25 18:24:17,567 INFO L124 PetriNetUnfolderBase]: 1264/7909 cut-off events. [2023-08-25 18:24:17,568 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-25 18:24:17,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8994 conditions, 7909 events. 1264/7909 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 69710 event pairs, 522 based on Foata normal form. 0/6799 useless extension candidates. Maximal degree in co-relation 5054. Up to 1024 conditions per place. [2023-08-25 18:24:18,645 INFO L119 LiptonReduction]: Number of co-enabled transitions 712880 [2023-08-25 18:24:27,524 INFO L134 LiptonReduction]: Checked pairs total: 3601903 [2023-08-25 18:24:27,524 INFO L136 LiptonReduction]: Total number of compositions: 552 [2023-08-25 18:24:27,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:24:27,527 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:24:27,527 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:24:27,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:24:27,632 INFO L124 PetriNetUnfolderBase]: 162/974 cut-off events. [2023-08-25 18:24:27,632 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-25 18:24:27,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:24:27,632 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:24:27,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:24:27,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:24:27,633 INFO L85 PathProgramCache]: Analyzing trace with hash 465498004, now seen corresponding path program 1 times [2023-08-25 18:24:27,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:24:27,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163151802] [2023-08-25 18:24:27,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:24:27,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:24:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:24:27,662 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:24:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:24:27,686 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:24:27,686 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:24:27,686 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:24:27,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-25 18:24:27,686 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:24:27,687 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:24:27,687 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:24:27,687 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-25 18:24:27,749 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-25 18:24:27,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 937 places, 1061 transitions, 2266 flow [2023-08-25 18:24:33,758 INFO L124 PetriNetUnfolderBase]: 2573/14512 cut-off events. [2023-08-25 18:24:33,758 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:24:34,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16889 conditions, 14512 events. 2573/14512 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 147165 event pairs, 1291 based on Foata normal form. 0/12593 useless extension candidates. Maximal degree in co-relation 8978. Up to 2304 conditions per place. [2023-08-25 18:24:34,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 937 places, 1061 transitions, 2266 flow [2023-08-25 18:24:34,521 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 936 places, 1059 transitions, 2262 flow [2023-08-25 18:24:34,521 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:24:34,521 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 936 places, 1059 transitions, 2262 flow [2023-08-25 18:24:34,521 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 936 places, 1059 transitions, 2262 flow [2023-08-25 18:24:34,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 936 places, 1059 transitions, 2262 flow [2023-08-25 18:24:40,486 INFO L124 PetriNetUnfolderBase]: 2572/14510 cut-off events. [2023-08-25 18:24:40,486 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-25 18:24:41,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16887 conditions, 14510 events. 2572/14510 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 147005 event pairs, 1291 based on Foata normal form. 0/12592 useless extension candidates. Maximal degree in co-relation 8976. Up to 2304 conditions per place. [2023-08-25 18:24:42,541 INFO L119 LiptonReduction]: Number of co-enabled transitions 885780 [2023-08-25 18:24:53,741 INFO L134 LiptonReduction]: Checked pairs total: 5006620 [2023-08-25 18:24:53,741 INFO L136 LiptonReduction]: Total number of compositions: 615 [2023-08-25 18:24:53,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:24:53,744 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:24:53,744 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:24:53,898 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:24:53,898 INFO L124 PetriNetUnfolderBase]: 184/1159 cut-off events. [2023-08-25 18:24:53,899 INFO L125 PetriNetUnfolderBase]: For 198/198 co-relation queries the response was YES. [2023-08-25 18:24:53,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:24:53,899 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:24:53,899 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:24:53,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:24:53,899 INFO L85 PathProgramCache]: Analyzing trace with hash 2108947951, now seen corresponding path program 1 times [2023-08-25 18:24:53,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:24:53,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177062869] [2023-08-25 18:24:53,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:24:53,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:24:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:24:53,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:24:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:24:53,947 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:24:53,947 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:24:53,948 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:24:53,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-25 18:24:53,948 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:24:53,948 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:24:53,948 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:24:53,949 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-25 18:24:54,008 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-25 18:24:54,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1022 places, 1158 transitions, 2486 flow [2023-08-25 18:25:05,806 INFO L124 PetriNetUnfolderBase]: 5417/27769 cut-off events. [2023-08-25 18:25:05,807 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:25:07,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32975 conditions, 27769 events. 5417/27769 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 319172 event pairs, 3084 based on Foata normal form. 0/24274 useless extension candidates. Maximal degree in co-relation 16869. Up to 5120 conditions per place. [2023-08-25 18:25:07,269 INFO L82 GeneralOperation]: Start removeDead. Operand has 1022 places, 1158 transitions, 2486 flow [2023-08-25 18:25:08,068 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1021 places, 1156 transitions, 2482 flow [2023-08-25 18:25:08,068 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:25:08,069 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1021 places, 1156 transitions, 2482 flow [2023-08-25 18:25:08,069 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1021 places, 1156 transitions, 2482 flow [2023-08-25 18:25:08,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1021 places, 1156 transitions, 2482 flow [2023-08-25 18:25:19,983 INFO L124 PetriNetUnfolderBase]: 5416/27767 cut-off events. [2023-08-25 18:25:19,983 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-25 18:25:21,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32973 conditions, 27767 events. 5416/27767 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 317556 event pairs, 3084 based on Foata normal form. 0/24273 useless extension candidates. Maximal degree in co-relation 16867. Up to 5120 conditions per place. [2023-08-25 18:25:24,771 INFO L119 LiptonReduction]: Number of co-enabled transitions 1077300 [2023-08-25 18:25:34,415 INFO L134 LiptonReduction]: Checked pairs total: 6148826 [2023-08-25 18:25:34,415 INFO L136 LiptonReduction]: Total number of compositions: 676 [2023-08-25 18:25:34,417 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:25:34,417 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:25:34,417 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:25:34,634 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:25:34,634 INFO L124 PetriNetUnfolderBase]: 231/1399 cut-off events. [2023-08-25 18:25:34,634 INFO L125 PetriNetUnfolderBase]: For 277/277 co-relation queries the response was YES. [2023-08-25 18:25:34,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:25:34,634 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:25:34,634 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:25:34,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:25:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1203608413, now seen corresponding path program 1 times [2023-08-25 18:25:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:25:34,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189134251] [2023-08-25 18:25:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:25:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:25:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:25:34,658 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:25:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:25:34,682 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:25:34,682 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:25:34,683 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:25:34,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-25 18:25:34,683 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:25:34,683 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:25:34,683 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:25:34,683 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-25 18:25:34,748 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-25 18:25:34,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1107 places, 1255 transitions, 2708 flow [2023-08-25 18:26:04,726 INFO L124 PetriNetUnfolderBase]: 11589/54594 cut-off events. [2023-08-25 18:26:04,727 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:26:11,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65958 conditions, 54594 events. 11589/54594 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 695938 event pairs, 7181 based on Foata normal form. 0/47987 useless extension candidates. Maximal degree in co-relation 32953. Up to 11264 conditions per place. [2023-08-25 18:26:11,748 INFO L82 GeneralOperation]: Start removeDead. Operand has 1107 places, 1255 transitions, 2708 flow [2023-08-25 18:26:13,236 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1106 places, 1253 transitions, 2704 flow [2023-08-25 18:26:13,237 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:26:13,237 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1106 places, 1253 transitions, 2704 flow [2023-08-25 18:26:13,237 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1106 places, 1253 transitions, 2704 flow [2023-08-25 18:26:13,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1106 places, 1253 transitions, 2704 flow [2023-08-25 18:26:39,458 INFO L124 PetriNetUnfolderBase]: 11588/54592 cut-off events. [2023-08-25 18:26:39,458 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-25 18:26:44,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65956 conditions, 54592 events. 11588/54592 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 695694 event pairs, 7181 based on Foata normal form. 0/47986 useless extension candidates. Maximal degree in co-relation 32951. Up to 11264 conditions per place. [2023-08-25 18:26:52,223 INFO L119 LiptonReduction]: Number of co-enabled transitions 1287440 [2023-08-25 18:27:02,563 INFO L134 LiptonReduction]: Checked pairs total: 6648674 [2023-08-25 18:27:02,563 INFO L136 LiptonReduction]: Total number of compositions: 737 [2023-08-25 18:27:02,564 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:27:02,565 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:27:02,565 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:27:02,818 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:27:02,818 INFO L124 PetriNetUnfolderBase]: 275/1674 cut-off events. [2023-08-25 18:27:02,818 INFO L125 PetriNetUnfolderBase]: For 382/382 co-relation queries the response was YES. [2023-08-25 18:27:02,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:27:02,818 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:27:02,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:27:02,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:27:02,819 INFO L85 PathProgramCache]: Analyzing trace with hash -2010626839, now seen corresponding path program 1 times [2023-08-25 18:27:02,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:27:02,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328196831] [2023-08-25 18:27:02,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:27:02,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:27:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:27:02,867 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:27:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:27:02,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:27:02,901 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:27:02,901 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:27:02,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-25 18:27:02,902 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:27:02,902 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:27:02,902 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:27:02,902 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-25 18:27:02,969 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-25 18:27:02,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1192 places, 1352 transitions, 2932 flow [2023-08-25 18:28:02,903 INFO L124 PetriNetUnfolderBase]: 24929/109067 cut-off events. [2023-08-25 18:28:02,904 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:28:20,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133758 conditions, 109067 events. 24929/109067 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1649. Compared 1538391 event pairs, 16398 based on Foata normal form. 0/96276 useless extension candidates. Maximal degree in co-relation 65934. Up to 24576 conditions per place. [2023-08-25 18:28:20,218 INFO L82 GeneralOperation]: Start removeDead. Operand has 1192 places, 1352 transitions, 2932 flow [2023-08-25 18:28:24,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 1191 places, 1350 transitions, 2928 flow [2023-08-25 18:28:24,903 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-25 18:28:24,903 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 1191 places, 1350 transitions, 2928 flow [2023-08-25 18:28:24,903 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 1191 places, 1350 transitions, 2928 flow [2023-08-25 18:28:24,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1191 places, 1350 transitions, 2928 flow [2023-08-25 18:29:23,542 INFO L124 PetriNetUnfolderBase]: 24928/109065 cut-off events. [2023-08-25 18:29:23,543 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-25 18:29:39,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133756 conditions, 109065 events. 24928/109065 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1649. Compared 1538452 event pairs, 16398 based on Foata normal form. 0/96275 useless extension candidates. Maximal degree in co-relation 65932. Up to 24576 conditions per place. [2023-08-25 18:30:04,155 INFO L119 LiptonReduction]: Number of co-enabled transitions 1516200 [2023-08-25 18:30:15,338 INFO L134 LiptonReduction]: Checked pairs total: 7825956 [2023-08-25 18:30:15,339 INFO L136 LiptonReduction]: Total number of compositions: 787 [2023-08-25 18:30:15,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-25 18:30:15,341 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=LoopsAndPotentialCycles, 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;@5b2b1fd8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-25 18:30:15,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-25 18:30:15,762 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-25 18:30:15,763 INFO L124 PetriNetUnfolderBase]: 338/2023 cut-off events. [2023-08-25 18:30:15,763 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2023-08-25 18:30:15,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-25 18:30:15,763 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-25 18:30:15,763 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-25 18:30:15,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-25 18:30:15,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1437888270, now seen corresponding path program 1 times [2023-08-25 18:30:15,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-25 18:30:15,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332021805] [2023-08-25 18:30:15,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-25 18:30:15,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-25 18:30:15,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:30:15,791 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-25 18:30:15,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-25 18:30:15,817 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-25 18:30:15,817 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-25 18:30:15,817 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-25 18:30:15,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-25 18:30:15,817 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-25 18:30:15,818 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-25 18:30:15,818 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-25 18:30:15,818 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-25 18:30:15,894 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-25 18:30:15,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 1277 places, 1449 transitions, 3158 flow