/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.signed.integer.overflows true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 05:08:40,134 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 05:08:40,202 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 [2023-08-27 05:08:40,206 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 05:08:40,206 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 05:08:40,226 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 05:08:40,227 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 05:08:40,227 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 05:08:40,228 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 05:08:40,228 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 05:08:40,228 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 05:08:40,229 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 05:08:40,229 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 05:08:40,229 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 05:08:40,230 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 05:08:40,230 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 05:08:40,230 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 05:08:40,231 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 05:08:40,231 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 05:08:40,231 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 05:08:40,232 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 05:08:40,238 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 05:08:40,238 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 05:08:40,239 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 05:08:40,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 05:08:40,239 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 05:08:40,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 05:08:40,240 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:08:40,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 05:08:40,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 05:08:40,241 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 05:08:40,241 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 05:08:40,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 05:08:40,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 05:08:40,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 05:08:40,242 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 05:08:40,564 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 05:08:40,598 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 05:08:40,601 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 05:08:40,603 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 05:08:40,603 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 05:08:40,605 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-27 05:08:41,820 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 05:08:42,119 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 05:08:42,119 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_20-callback_racefree.i [2023-08-27 05:08:42,139 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2e0c9dc/f8ee467b6eea46d79e78aa56c6e44a71/FLAGdb6e3eefe [2023-08-27 05:08:42,154 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3e2e0c9dc/f8ee467b6eea46d79e78aa56c6e44a71 [2023-08-27 05:08:42,158 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 05:08:42,161 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 05:08:42,164 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 05:08:42,165 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 05:08:42,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 05:08:42,169 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46af2018 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42, skipping insertion in model container [2023-08-27 05:08:42,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,201 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 05:08:42,525 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:08:42,543 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 05:08:42,571 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-27 05:08:42,572 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-27 05:08:42,602 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 05:08:42,635 WARN L669 CHandler]: The function callback is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 05:08:42,640 INFO L206 MainTranslator]: Completed translation [2023-08-27 05:08:42,641 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42 WrapperNode [2023-08-27 05:08:42,641 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 05:08:42,642 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 05:08:42,642 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 05:08:42,642 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 05:08:42,648 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,660 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,693 INFO L138 Inliner]: procedures = 173, calls = 34, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 151 [2023-08-27 05:08:42,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 05:08:42,697 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 05:08:42,697 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 05:08:42,698 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 05:08:42,705 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,705 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,718 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,728 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,731 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,733 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,734 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,753 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 05:08:42,754 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 05:08:42,754 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 05:08:42,754 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 05:08:42,755 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (1/1) ... [2023-08-27 05:08:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 05:08:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 05:08:42,790 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) [2023-08-27 05:08:42,818 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 [2023-08-27 05:08:42,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-27 05:08:42,833 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 05:08:42,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 05:08:42,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 05:08:42,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 05:08:42,835 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 05:08:42,950 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 05:08:42,952 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 05:08:43,247 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 05:08:43,258 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 05:08:43,259 INFO L302 CfgBuilder]: Removed 11 assume(true) statements. [2023-08-27 05:08:43,262 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:08:43 BoogieIcfgContainer [2023-08-27 05:08:43,262 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 05:08:43,264 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 05:08:43,265 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 05:08:43,267 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 05:08:43,268 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:08:42" (1/3) ... [2023-08-27 05:08:43,268 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330e8431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:08:43, skipping insertion in model container [2023-08-27 05:08:43,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:08:42" (2/3) ... [2023-08-27 05:08:43,269 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@330e8431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:08:43, skipping insertion in model container [2023-08-27 05:08:43,269 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:08:43" (3/3) ... [2023-08-27 05:08:43,270 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2023-08-27 05:08:43,286 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 05:08:43,286 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-27 05:08:43,286 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 05:08:43,357 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-27 05:08:43,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 151 places, 164 transitions, 336 flow [2023-08-27 05:08:43,501 INFO L124 PetriNetUnfolderBase]: 27/249 cut-off events. [2023-08-27 05:08:43,502 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 05:08:43,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 255 conditions, 249 events. 27/249 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 754 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2023-08-27 05:08:43,509 INFO L82 GeneralOperation]: Start removeDead. Operand has 151 places, 164 transitions, 336 flow [2023-08-27 05:08:43,517 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 143 places, 155 transitions, 315 flow [2023-08-27 05:08:43,521 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:08:43,532 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 143 places, 155 transitions, 315 flow [2023-08-27 05:08:43,536 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 143 places, 155 transitions, 315 flow [2023-08-27 05:08:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 143 places, 155 transitions, 315 flow [2023-08-27 05:08:43,586 INFO L124 PetriNetUnfolderBase]: 26/240 cut-off events. [2023-08-27 05:08:43,587 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:08:43,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 240 events. 26/240 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 681 event pairs, 0 based on Foata normal form. 0/195 useless extension candidates. Maximal degree in co-relation 120. Up to 6 conditions per place. [2023-08-27 05:08:43,591 INFO L119 LiptonReduction]: Number of co-enabled transitions 4560 [2023-08-27 05:08:47,360 INFO L134 LiptonReduction]: Checked pairs total: 6536 [2023-08-27 05:08:47,360 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-27 05:08:47,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:08:47,376 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:08:47,376 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:08:47,381 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:08:47,381 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2023-08-27 05:08:47,382 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 05:08:47,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:08:47,382 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 05:08:47,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:08:47,387 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:08:47,387 INFO L85 PathProgramCache]: Analyzing trace with hash 577856155, now seen corresponding path program 1 times [2023-08-27 05:08:47,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:08:47,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131470633] [2023-08-27 05:08:47,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:08:47,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:08:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:47,540 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:08:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:47,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:08:47,603 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:08:47,604 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:08:47,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 05:08:47,606 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:08:47,608 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:08:47,609 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:08:47,609 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-27 05:08:47,627 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 05:08:47,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 190 transitions, 398 flow [2023-08-27 05:08:47,667 INFO L124 PetriNetUnfolderBase]: 45/397 cut-off events. [2023-08-27 05:08:47,667 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:08:47,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 397 events. 45/397 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1518 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 251. Up to 9 conditions per place. [2023-08-27 05:08:47,671 INFO L82 GeneralOperation]: Start removeDead. Operand has 174 places, 190 transitions, 398 flow [2023-08-27 05:08:47,673 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 174 places, 190 transitions, 398 flow [2023-08-27 05:08:47,673 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:08:47,673 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 174 places, 190 transitions, 398 flow [2023-08-27 05:08:47,673 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 174 places, 190 transitions, 398 flow [2023-08-27 05:08:47,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 174 places, 190 transitions, 398 flow [2023-08-27 05:08:47,709 INFO L124 PetriNetUnfolderBase]: 45/397 cut-off events. [2023-08-27 05:08:47,709 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 05:08:47,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 411 conditions, 397 events. 45/397 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1518 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 251. Up to 9 conditions per place. [2023-08-27 05:08:47,719 INFO L119 LiptonReduction]: Number of co-enabled transitions 11184 [2023-08-27 05:08:51,254 INFO L134 LiptonReduction]: Checked pairs total: 17815 [2023-08-27 05:08:51,254 INFO L136 LiptonReduction]: Total number of compositions: 175 [2023-08-27 05:08:51,256 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:08:51,257 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:08:51,258 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:08:51,264 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:08:51,264 INFO L124 PetriNetUnfolderBase]: 19/84 cut-off events. [2023-08-27 05:08:51,264 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 05:08:51,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:08:51,264 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-27 05:08:51,265 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:08:51,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:08:51,265 INFO L85 PathProgramCache]: Analyzing trace with hash -549107488, now seen corresponding path program 1 times [2023-08-27 05:08:51,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:08:51,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274777160] [2023-08-27 05:08:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:08:51,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:08:51,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:51,292 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:08:51,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:51,315 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:08:51,316 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:08:51,316 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:08:51,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 05:08:51,316 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:08:51,317 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:08:51,317 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:08:51,317 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-27 05:08:51,335 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 05:08:51,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 216 transitions, 462 flow [2023-08-27 05:08:51,391 INFO L124 PetriNetUnfolderBase]: 68/586 cut-off events. [2023-08-27 05:08:51,391 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:08:51,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 586 events. 68/586 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2482 event pairs, 1 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 405. Up to 16 conditions per place. [2023-08-27 05:08:51,396 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 216 transitions, 462 flow [2023-08-27 05:08:51,400 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 216 transitions, 462 flow [2023-08-27 05:08:51,400 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:08:51,400 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 216 transitions, 462 flow [2023-08-27 05:08:51,400 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 216 transitions, 462 flow [2023-08-27 05:08:51,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 216 transitions, 462 flow [2023-08-27 05:08:51,454 INFO L124 PetriNetUnfolderBase]: 68/586 cut-off events. [2023-08-27 05:08:51,455 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-27 05:08:51,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 614 conditions, 586 events. 68/586 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2482 event pairs, 1 based on Foata normal form. 0/467 useless extension candidates. Maximal degree in co-relation 405. Up to 16 conditions per place. [2023-08-27 05:08:51,476 INFO L119 LiptonReduction]: Number of co-enabled transitions 18720 [2023-08-27 05:08:55,047 INFO L134 LiptonReduction]: Checked pairs total: 32229 [2023-08-27 05:08:55,047 INFO L136 LiptonReduction]: Total number of compositions: 205 [2023-08-27 05:08:55,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:08:55,050 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:08:55,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:08:55,058 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:08:55,059 INFO L124 PetriNetUnfolderBase]: 32/135 cut-off events. [2023-08-27 05:08:55,059 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 05:08:55,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:08:55,059 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-27 05:08:55,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:08:55,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:08:55,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1088747075, now seen corresponding path program 1 times [2023-08-27 05:08:55,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:08:55,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573792971] [2023-08-27 05:08:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:08:55,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:08:55,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:55,084 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:08:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:55,104 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:08:55,104 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:08:55,104 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:08:55,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 05:08:55,105 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:08:55,105 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:08:55,105 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:08:55,105 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-27 05:08:55,128 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 05:08:55,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 242 transitions, 528 flow [2023-08-27 05:08:55,230 INFO L124 PetriNetUnfolderBase]: 103/859 cut-off events. [2023-08-27 05:08:55,230 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:08:55,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 859 events. 103/859 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3968 event pairs, 6 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 606. Up to 32 conditions per place. [2023-08-27 05:08:55,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 220 places, 242 transitions, 528 flow [2023-08-27 05:08:55,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 220 places, 242 transitions, 528 flow [2023-08-27 05:08:55,250 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:08:55,251 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 220 places, 242 transitions, 528 flow [2023-08-27 05:08:55,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 220 places, 242 transitions, 528 flow [2023-08-27 05:08:55,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 220 places, 242 transitions, 528 flow [2023-08-27 05:08:55,346 INFO L124 PetriNetUnfolderBase]: 103/859 cut-off events. [2023-08-27 05:08:55,347 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-27 05:08:55,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 914 conditions, 859 events. 103/859 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3968 event pairs, 6 based on Foata normal form. 0/684 useless extension candidates. Maximal degree in co-relation 606. Up to 32 conditions per place. [2023-08-27 05:08:55,376 INFO L119 LiptonReduction]: Number of co-enabled transitions 27552 [2023-08-27 05:08:58,969 INFO L134 LiptonReduction]: Checked pairs total: 45659 [2023-08-27 05:08:58,969 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-27 05:08:58,970 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:08:58,971 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:08:58,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:08:58,984 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:08:58,985 INFO L124 PetriNetUnfolderBase]: 48/197 cut-off events. [2023-08-27 05:08:58,985 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2023-08-27 05:08:58,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:08:58,985 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-08-27 05:08:58,985 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:08:58,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:08:58,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1744245355, now seen corresponding path program 1 times [2023-08-27 05:08:58,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:08:58,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904126593] [2023-08-27 05:08:58,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:08:58,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:08:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:59,009 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:08:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:08:59,033 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:08:59,033 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:08:59,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:08:59,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 05:08:59,034 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:08:59,034 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:08:59,034 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:08:59,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2023-08-27 05:08:59,054 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2023-08-27 05:08:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 268 transitions, 596 flow [2023-08-27 05:08:59,257 INFO L124 PetriNetUnfolderBase]: 166/1304 cut-off events. [2023-08-27 05:08:59,257 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:08:59,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 1304 events. 166/1304 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 6790 event pairs, 23 based on Foata normal form. 0/1041 useless extension candidates. Maximal degree in co-relation 904. Up to 80 conditions per place. [2023-08-27 05:08:59,273 INFO L82 GeneralOperation]: Start removeDead. Operand has 243 places, 268 transitions, 596 flow [2023-08-27 05:08:59,282 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 268 transitions, 596 flow [2023-08-27 05:08:59,282 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:08:59,282 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 268 transitions, 596 flow [2023-08-27 05:08:59,283 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 268 transitions, 596 flow [2023-08-27 05:08:59,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 268 transitions, 596 flow [2023-08-27 05:08:59,435 INFO L124 PetriNetUnfolderBase]: 166/1304 cut-off events. [2023-08-27 05:08:59,435 INFO L125 PetriNetUnfolderBase]: For 110/110 co-relation queries the response was YES. [2023-08-27 05:08:59,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1415 conditions, 1304 events. 166/1304 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 6790 event pairs, 23 based on Foata normal form. 0/1041 useless extension candidates. Maximal degree in co-relation 904. Up to 80 conditions per place. [2023-08-27 05:08:59,487 INFO L119 LiptonReduction]: Number of co-enabled transitions 37680 [2023-08-27 05:09:03,126 INFO L134 LiptonReduction]: Checked pairs total: 62744 [2023-08-27 05:09:03,126 INFO L136 LiptonReduction]: Total number of compositions: 249 [2023-08-27 05:09:03,129 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:09:03,131 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:09:03,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:09:03,148 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:09:03,148 INFO L124 PetriNetUnfolderBase]: 61/258 cut-off events. [2023-08-27 05:09:03,148 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-27 05:09:03,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:09:03,149 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:09:03,149 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:09:03,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:09:03,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1138977956, now seen corresponding path program 1 times [2023-08-27 05:09:03,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:09:03,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088313513] [2023-08-27 05:09:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:09:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:09:03,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:03,184 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:09:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:03,206 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:09:03,206 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:09:03,207 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:09:03,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 05:09:03,207 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:09:03,207 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:09:03,207 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:09:03,208 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2023-08-27 05:09:03,229 INFO L144 ThreadInstanceAdder]: Constructed 6 joinOtherThreadTransitions. [2023-08-27 05:09:03,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 294 transitions, 666 flow [2023-08-27 05:09:03,573 INFO L124 PetriNetUnfolderBase]: 293/2101 cut-off events. [2023-08-27 05:09:03,574 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:09:03,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2333 conditions, 2101 events. 293/2101 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 12747 event pairs, 72 based on Foata normal form. 0/1686 useless extension candidates. Maximal degree in co-relation 1403. Up to 192 conditions per place. [2023-08-27 05:09:03,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 266 places, 294 transitions, 666 flow [2023-08-27 05:09:03,609 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 266 places, 294 transitions, 666 flow [2023-08-27 05:09:03,609 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:09:03,609 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 266 places, 294 transitions, 666 flow [2023-08-27 05:09:03,609 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 266 places, 294 transitions, 666 flow [2023-08-27 05:09:03,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 266 places, 294 transitions, 666 flow [2023-08-27 05:09:03,877 INFO L124 PetriNetUnfolderBase]: 293/2101 cut-off events. [2023-08-27 05:09:03,878 INFO L125 PetriNetUnfolderBase]: For 242/242 co-relation queries the response was YES. [2023-08-27 05:09:03,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2333 conditions, 2101 events. 293/2101 cut-off events. For 242/242 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 12747 event pairs, 72 based on Foata normal form. 0/1686 useless extension candidates. Maximal degree in co-relation 1403. Up to 192 conditions per place. [2023-08-27 05:09:03,986 INFO L119 LiptonReduction]: Number of co-enabled transitions 49104 [2023-08-27 05:09:07,847 INFO L134 LiptonReduction]: Checked pairs total: 89021 [2023-08-27 05:09:07,847 INFO L136 LiptonReduction]: Total number of compositions: 266 [2023-08-27 05:09:07,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:09:07,849 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:09:07,849 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:09:07,875 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:09:07,875 INFO L124 PetriNetUnfolderBase]: 83/345 cut-off events. [2023-08-27 05:09:07,875 INFO L125 PetriNetUnfolderBase]: For 79/79 co-relation queries the response was YES. [2023-08-27 05:09:07,875 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:09:07,875 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:09:07,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:09:07,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:09:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash -666091163, now seen corresponding path program 1 times [2023-08-27 05:09:07,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:09:07,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653426882] [2023-08-27 05:09:07,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:09:07,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:09:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:07,910 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:09:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:07,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:09:07,951 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:09:07,951 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:09:07,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 05:09:07,952 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:09:07,956 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:09:07,957 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:09:07,959 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2023-08-27 05:09:07,991 INFO L144 ThreadInstanceAdder]: Constructed 7 joinOtherThreadTransitions. [2023-08-27 05:09:07,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 320 transitions, 738 flow [2023-08-27 05:09:08,554 INFO L124 PetriNetUnfolderBase]: 564/3618 cut-off events. [2023-08-27 05:09:08,554 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:09:08,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 3618 events. 564/3618 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 25896 event pairs, 201 based on Foata normal form. 0/2923 useless extension candidates. Maximal degree in co-relation 2319. Up to 448 conditions per place. [2023-08-27 05:09:08,622 INFO L82 GeneralOperation]: Start removeDead. Operand has 289 places, 320 transitions, 738 flow [2023-08-27 05:09:08,649 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 289 places, 320 transitions, 738 flow [2023-08-27 05:09:08,649 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:09:08,649 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 289 places, 320 transitions, 738 flow [2023-08-27 05:09:08,649 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 289 places, 320 transitions, 738 flow [2023-08-27 05:09:08,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 289 places, 320 transitions, 738 flow [2023-08-27 05:09:09,213 INFO L124 PetriNetUnfolderBase]: 564/3618 cut-off events. [2023-08-27 05:09:09,213 INFO L125 PetriNetUnfolderBase]: For 525/525 co-relation queries the response was YES. [2023-08-27 05:09:09,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4116 conditions, 3618 events. 564/3618 cut-off events. For 525/525 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 25896 event pairs, 201 based on Foata normal form. 0/2923 useless extension candidates. Maximal degree in co-relation 2319. Up to 448 conditions per place. [2023-08-27 05:09:09,371 INFO L119 LiptonReduction]: Number of co-enabled transitions 61824 [2023-08-27 05:09:13,327 INFO L134 LiptonReduction]: Checked pairs total: 111939 [2023-08-27 05:09:13,327 INFO L136 LiptonReduction]: Total number of compositions: 302 [2023-08-27 05:09:13,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:09:13,329 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:09:13,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:09:13,359 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:09:13,359 INFO L124 PetriNetUnfolderBase]: 105/449 cut-off events. [2023-08-27 05:09:13,359 INFO L125 PetriNetUnfolderBase]: For 129/129 co-relation queries the response was YES. [2023-08-27 05:09:13,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:09:13,359 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:09:13,360 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:09:13,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:09:13,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1108570713, now seen corresponding path program 1 times [2023-08-27 05:09:13,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:09:13,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239211099] [2023-08-27 05:09:13,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:09:13,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:09:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:13,382 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:09:13,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:13,402 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:09:13,402 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:09:13,403 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:09:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 05:09:13,403 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:09:13,403 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:09:13,403 WARN L233 ceAbstractionStarter]: 7 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:09:13,403 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 8 thread instances. [2023-08-27 05:09:13,428 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2023-08-27 05:09:13,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 346 transitions, 812 flow [2023-08-27 05:09:14,613 INFO L124 PetriNetUnfolderBase]: 1155/6607 cut-off events. [2023-08-27 05:09:14,614 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:09:14,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 6607 events. 1155/6607 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 56303 event pairs, 522 based on Foata normal form. 0/5376 useless extension candidates. Maximal degree in co-relation 4100. Up to 1024 conditions per place. [2023-08-27 05:09:14,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 312 places, 346 transitions, 812 flow [2023-08-27 05:09:14,724 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 312 places, 346 transitions, 812 flow [2023-08-27 05:09:14,724 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:09:14,724 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 312 places, 346 transitions, 812 flow [2023-08-27 05:09:14,725 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 312 places, 346 transitions, 812 flow [2023-08-27 05:09:14,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 312 places, 346 transitions, 812 flow [2023-08-27 05:09:15,722 INFO L124 PetriNetUnfolderBase]: 1155/6607 cut-off events. [2023-08-27 05:09:15,722 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2023-08-27 05:09:15,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7692 conditions, 6607 events. 1155/6607 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 56303 event pairs, 522 based on Foata normal form. 0/5376 useless extension candidates. Maximal degree in co-relation 4100. Up to 1024 conditions per place. [2023-08-27 05:09:16,103 INFO L119 LiptonReduction]: Number of co-enabled transitions 75840 [2023-08-27 05:09:20,366 INFO L134 LiptonReduction]: Checked pairs total: 151845 [2023-08-27 05:09:20,366 INFO L136 LiptonReduction]: Total number of compositions: 318 [2023-08-27 05:09:20,367 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:09:20,368 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:09:20,368 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:09:20,411 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:09:20,411 INFO L124 PetriNetUnfolderBase]: 138/592 cut-off events. [2023-08-27 05:09:20,411 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-27 05:09:20,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:09:20,411 INFO L208 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:09:20,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:09:20,412 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:09:20,412 INFO L85 PathProgramCache]: Analyzing trace with hash -791792681, now seen corresponding path program 1 times [2023-08-27 05:09:20,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:09:20,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880913827] [2023-08-27 05:09:20,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:09:20,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:09:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:20,433 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:09:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:20,453 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:09:20,454 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:09:20,454 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:09:20,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 05:09:20,454 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:09:20,454 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:09:20,455 WARN L233 ceAbstractionStarter]: 8 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:09:20,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 9 thread instances. [2023-08-27 05:09:20,480 INFO L144 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2023-08-27 05:09:20,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 888 flow [2023-08-27 05:09:22,637 INFO L124 PetriNetUnfolderBase]: 2450/12604 cut-off events. [2023-08-27 05:09:22,638 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:09:22,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 12604 events. 2450/12604 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 124044 event pairs, 1291 based on Foata normal form. 0/10325 useless extension candidates. Maximal degree in co-relation 7674. Up to 2304 conditions per place. [2023-08-27 05:09:22,833 INFO L82 GeneralOperation]: Start removeDead. Operand has 335 places, 372 transitions, 888 flow [2023-08-27 05:09:22,894 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 335 places, 372 transitions, 888 flow [2023-08-27 05:09:22,894 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:09:22,894 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 335 places, 372 transitions, 888 flow [2023-08-27 05:09:22,894 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 335 places, 372 transitions, 888 flow [2023-08-27 05:09:22,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 335 places, 372 transitions, 888 flow [2023-08-27 05:09:25,053 INFO L124 PetriNetUnfolderBase]: 2450/12604 cut-off events. [2023-08-27 05:09:25,053 INFO L125 PetriNetUnfolderBase]: For 2460/2460 co-relation queries the response was YES. [2023-08-27 05:09:25,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14981 conditions, 12604 events. 2450/12604 cut-off events. For 2460/2460 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 124044 event pairs, 1291 based on Foata normal form. 0/10325 useless extension candidates. Maximal degree in co-relation 7674. Up to 2304 conditions per place. [2023-08-27 05:09:25,626 INFO L119 LiptonReduction]: Number of co-enabled transitions 91152 [2023-08-27 05:09:29,979 INFO L134 LiptonReduction]: Checked pairs total: 165632 [2023-08-27 05:09:29,979 INFO L136 LiptonReduction]: Total number of compositions: 352 [2023-08-27 05:09:29,981 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:09:29,981 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:09:29,981 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:09:30,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:09:30,042 INFO L124 PetriNetUnfolderBase]: 185/788 cut-off events. [2023-08-27 05:09:30,042 INFO L125 PetriNetUnfolderBase]: For 309/309 co-relation queries the response was YES. [2023-08-27 05:09:30,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:09:30,042 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:09:30,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:09:30,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:09:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash -955639765, now seen corresponding path program 1 times [2023-08-27 05:09:30,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:09:30,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319101629] [2023-08-27 05:09:30,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:09:30,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:09:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:30,063 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:09:30,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:30,084 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:09:30,084 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:09:30,084 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:09:30,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 05:09:30,084 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:09:30,085 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:09:30,085 WARN L233 ceAbstractionStarter]: 9 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:09:30,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 10 thread instances. [2023-08-27 05:09:30,113 INFO L144 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2023-08-27 05:09:30,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 398 transitions, 966 flow [2023-08-27 05:09:34,888 INFO L124 PetriNetUnfolderBase]: 5281/24745 cut-off events. [2023-08-27 05:09:34,888 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:09:35,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 24745 events. 5281/24745 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 276733 event pairs, 3084 based on Foata normal form. 0/20394 useless extension candidates. Maximal degree in co-relation 14961. Up to 5120 conditions per place. [2023-08-27 05:09:35,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 358 places, 398 transitions, 966 flow [2023-08-27 05:09:35,406 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 358 places, 398 transitions, 966 flow [2023-08-27 05:09:35,407 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:09:35,407 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 358 places, 398 transitions, 966 flow [2023-08-27 05:09:35,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 358 places, 398 transitions, 966 flow [2023-08-27 05:09:35,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 358 places, 398 transitions, 966 flow [2023-08-27 05:09:40,257 INFO L124 PetriNetUnfolderBase]: 5281/24745 cut-off events. [2023-08-27 05:09:40,258 INFO L125 PetriNetUnfolderBase]: For 5330/5330 co-relation queries the response was YES. [2023-08-27 05:09:40,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29951 conditions, 24745 events. 5281/24745 cut-off events. For 5330/5330 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 276733 event pairs, 3084 based on Foata normal form. 0/20394 useless extension candidates. Maximal degree in co-relation 14961. Up to 5120 conditions per place. [2023-08-27 05:09:41,426 INFO L119 LiptonReduction]: Number of co-enabled transitions 107760 [2023-08-27 05:09:46,223 INFO L134 LiptonReduction]: Checked pairs total: 211600 [2023-08-27 05:09:46,223 INFO L136 LiptonReduction]: Total number of compositions: 361 [2023-08-27 05:09:46,224 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:09:46,225 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:09:46,225 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:09:46,313 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:09:46,313 INFO L124 PetriNetUnfolderBase]: 260/1077 cut-off events. [2023-08-27 05:09:46,313 INFO L125 PetriNetUnfolderBase]: For 469/469 co-relation queries the response was YES. [2023-08-27 05:09:46,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:09:46,313 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:09:46,313 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:09:46,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:09:46,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1421249262, now seen corresponding path program 1 times [2023-08-27 05:09:46,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:09:46,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491699276] [2023-08-27 05:09:46,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:09:46,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:09:46,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:46,338 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:09:46,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:09:46,372 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:09:46,372 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:09:46,372 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:09:46,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 05:09:46,373 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:09:46,373 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:09:46,373 WARN L233 ceAbstractionStarter]: 10 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:09:46,373 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 11 thread instances. [2023-08-27 05:09:46,405 INFO L144 ThreadInstanceAdder]: Constructed 11 joinOtherThreadTransitions. [2023-08-27 05:09:46,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 381 places, 424 transitions, 1046 flow [2023-08-27 05:09:58,112 INFO L124 PetriNetUnfolderBase]: 11440/49430 cut-off events. [2023-08-27 05:09:58,112 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:09:59,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60794 conditions, 49430 events. 11440/49430 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 616006 event pairs, 7181 based on Foata normal form. 0/40959 useless extension candidates. Maximal degree in co-relation 29929. Up to 11264 conditions per place. [2023-08-27 05:09:59,664 INFO L82 GeneralOperation]: Start removeDead. Operand has 381 places, 424 transitions, 1046 flow [2023-08-27 05:10:00,122 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 381 places, 424 transitions, 1046 flow [2023-08-27 05:10:00,123 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:10:00,123 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 381 places, 424 transitions, 1046 flow [2023-08-27 05:10:00,123 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 381 places, 424 transitions, 1046 flow [2023-08-27 05:10:00,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 381 places, 424 transitions, 1046 flow [2023-08-27 05:10:10,592 INFO L124 PetriNetUnfolderBase]: 11440/49430 cut-off events. [2023-08-27 05:10:10,593 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2023-08-27 05:10:12,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60794 conditions, 49430 events. 11440/49430 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 779. Compared 616006 event pairs, 7181 based on Foata normal form. 0/40959 useless extension candidates. Maximal degree in co-relation 29929. Up to 11264 conditions per place. [2023-08-27 05:10:14,717 INFO L119 LiptonReduction]: Number of co-enabled transitions 125664 [2023-08-27 05:10:19,439 INFO L134 LiptonReduction]: Checked pairs total: 263144 [2023-08-27 05:10:19,439 INFO L136 LiptonReduction]: Total number of compositions: 389 [2023-08-27 05:10:19,440 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:10:19,440 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:10:19,440 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:10:19,556 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:10:19,556 INFO L124 PetriNetUnfolderBase]: 390/1520 cut-off events. [2023-08-27 05:10:19,556 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2023-08-27 05:10:19,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:10:19,556 INFO L208 CegarLoopForPetriNet]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:10:19,557 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:10:19,557 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:10:19,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1041376022, now seen corresponding path program 1 times [2023-08-27 05:10:19,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:10:19,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300454588] [2023-08-27 05:10:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:10:19,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:10:19,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:10:19,582 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:10:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:10:19,606 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:10:19,607 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:10:19,607 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:10:19,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 05:10:19,607 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:10:19,607 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:10:19,608 WARN L233 ceAbstractionStarter]: 11 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:10:19,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 12 thread instances. [2023-08-27 05:10:19,638 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2023-08-27 05:10:19,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 450 transitions, 1128 flow [2023-08-27 05:10:42,648 INFO L124 PetriNetUnfolderBase]: 24767/99715 cut-off events. [2023-08-27 05:10:42,648 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:10:46,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124406 conditions, 99715 events. 24767/99715 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 1362898 event pairs, 16398 based on Foata normal form. 0/83028 useless extension candidates. Maximal degree in co-relation 60770. Up to 24576 conditions per place. [2023-08-27 05:10:46,785 INFO L82 GeneralOperation]: Start removeDead. Operand has 404 places, 450 transitions, 1128 flow [2023-08-27 05:10:47,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 404 places, 450 transitions, 1128 flow [2023-08-27 05:10:47,855 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 05:10:47,855 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 404 places, 450 transitions, 1128 flow [2023-08-27 05:10:47,855 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 404 places, 450 transitions, 1128 flow [2023-08-27 05:10:47,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 404 places, 450 transitions, 1128 flow [2023-08-27 05:11:12,557 INFO L124 PetriNetUnfolderBase]: 24767/99715 cut-off events. [2023-08-27 05:11:12,557 INFO L125 PetriNetUnfolderBase]: For 24928/24928 co-relation queries the response was YES. [2023-08-27 05:11:16,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124406 conditions, 99715 events. 24767/99715 cut-off events. For 24928/24928 co-relation queries the response was YES. Maximal size of possible extension queue 1477. Compared 1362898 event pairs, 16398 based on Foata normal form. 0/83028 useless extension candidates. Maximal degree in co-relation 60770. Up to 24576 conditions per place. [2023-08-27 05:11:23,221 INFO L119 LiptonReduction]: Number of co-enabled transitions 144864 [2023-08-27 05:11:27,947 INFO L134 LiptonReduction]: Checked pairs total: 270514 [2023-08-27 05:11:27,947 INFO L136 LiptonReduction]: Total number of compositions: 411 [2023-08-27 05:11:27,948 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-27 05:11:27,949 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;@1b464ea0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 05:11:27,949 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-27 05:11:28,094 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 05:11:28,094 INFO L124 PetriNetUnfolderBase]: 603/2195 cut-off events. [2023-08-27 05:11:28,094 INFO L125 PetriNetUnfolderBase]: For 1089/1089 co-relation queries the response was YES. [2023-08-27 05:11:28,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 05:11:28,095 INFO L208 CegarLoopForPetriNet]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 05:11:28,095 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-27 05:11:28,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 05:11:28,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1011081584, now seen corresponding path program 1 times [2023-08-27 05:11:28,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 05:11:28,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532778583] [2023-08-27 05:11:28,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 05:11:28,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 05:11:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:28,140 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-27 05:11:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-27 05:11:28,181 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-27 05:11:28,182 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-27 05:11:28,182 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-27 05:11:28,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 05:11:28,182 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-27 05:11:28,183 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (1/2) [2023-08-27 05:11:28,183 WARN L233 ceAbstractionStarter]: 12 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-27 05:11:28,183 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 13 thread instances. [2023-08-27 05:11:28,218 INFO L144 ThreadInstanceAdder]: Constructed 13 joinOtherThreadTransitions. [2023-08-27 05:11:28,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 427 places, 476 transitions, 1212 flow